CN106031286B - Base station, user equipment and method for implementing LBT based on mobile communication system - Google Patents

Abstract

The invention provides a base station, UE and a method for realizing LBT based on a mobile communication system, which divide the competitive time period of the UE and the base station according to the uplink and downlink transmission section, stipulate that the UE only competes for the unauthorized spectrum in the uplink time period, and the base station only competes for the unauthorized spectrum in the downlink time period, thereby enabling the LBT mechanism to be more efficiently applied to the mobile communication system with independent uplink and downlink time periods. In addition, the embodiment of the invention also provides an LBT base station, UE and a method based on a mobile communication system, after the base station or the UE occupies the channel, whether the channel has carrier signals sent by other base stations is monitored in the collision detection gap by determining a collision detection gap, and whether the signal is continuously sent subsequently is determined according to the monitoring result, thereby reducing the probability of channel occupation collision among a plurality of base stations or a plurality of UE.

Description

Base station, user equipment and method for implementing LBT based on mobile communication system

technical field

The present invention relates to the field of communication technology, in particular to a base station, user equipment and method for realizing LBT based on a mobile communication system.

Background technique

Unlicensed spectrum (English: Unlicensed Spectrum) refers to public spectrum, which can be used by any organization or individual. However, when using unlicensed spectrum, it is necessary to follow the Listen Before Talk (English: Listen Before Talk, referred to as: LBT) mechanism, that is, the communication device first monitors whether other communication devices are sending data on the channel before sending the frame. If the channel is idle, the The station can transmit data; otherwise, the communication device will not send data temporarily, but try again after avoiding it for a period of time. Usually LBT needs to follow the principle of clear channel assessment (English: Clear Channel Assessment, referred to as CCA) and the principle of extended clear channel assessment (English: Extended CCA, referred to as: ECCA). The so-called CCA principle is that the communication device needs to monitor the channel at least one CCA observation time window The length of time, where the CCA observation time window is a predetermined length of time, such as 20 microseconds (unit: us), if the communication device does not monitor the carrier signal within this CCA observation time window, the channel is considered to be an idle channel can use. If the communication device monitors the carrier signal within this CCA observation time window, it considers that the channel is occupied, and thus enters the ECCA stage. In the ECCA phase, the communication device will generate an integer random number R, and then it needs to continuously monitor R CCA observation time windows before using the channel at a channel idle point.

The second-generation mobile communication system (English: 2nd Generation, referred to as: 2G), the third-generation mobile communication system (English: 3nd Generation, referred to as: 3G) and the long-term evolution (Long Term Evolution, LTE) system use licensed spectrum , if the unlicensed spectrum is to be used in the mobile communication system, the LBT mechanism must also be followed. However, the LBT mechanism is generally applied to wireless local area network technology (referred to as: WLAN). If it is directly applied to a mobile communication system, the following problems will arise:

First, in the current LBT mechanism, a user equipment (User Equipment, UE) and a wireless access point (Wireless Access Point, AP) have the same function, and both compete with each other for the right to use unlicensed spectrum at the same time. However, in a mobile communication system, the base station and the UE have their own transmission times and will not compete for channels at the same time. Therefore, the current LBT mechanism is not suitable for mobile communication systems with independent uplink and downlink time periods.

Second, if multiple base stations or multiple UEs compete for channels at the same time according to the LBT mechanism, then multiple base stations or multiple UEs may think that the channel is idle at the same time, so they start to use the channel at the same time, resulting in channel occupation conflicts. As shown in FIG. 1 , it is a schematic diagram of channel occupation conflicts occurring among multiple base stations.

Contents of the invention

Embodiments of the present invention provide a base station, UE and method for implementing LBT based on a mobile communication system, to solve the problem that the current LBT mechanism is not suitable for mobile communication systems with independent uplink and downlink time periods, and multiple base stations or multiple The simultaneous channel competition by the UE according to the LBT mechanism may cause the problem of channel occupation conflict.

In a first aspect, an embodiment of the present invention provides a base station, including:

A configuration unit, configured to configure at least one secondary carrier for the UE, where the secondary carrier works in an unlicensed frequency band;

a determining unit, configured to determine division information of uplink and downlink time periods of the auxiliary carrier, where the division information of uplink and downlink time periods includes division information of downlink time periods and division information of uplink time periods;

The processing unit is configured to perform CCA or ECCA on the channels of the secondary carrier during the downlink time period according to the division information of the uplink and downlink time periods, and stop performing CCA or ECCA on the channels of the secondary carrier during the uplink time period.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the division information of the uplink and downlink time periods further includes division information of conversion gaps between the uplink and downlink time periods;

The processing unit is also used for:

Stop performing CCA or ECCA on the channel of the secondary carrier during the conversion gap.

With reference to the first aspect, in a second possible implementation manner of the first aspect, when performing CCA on the channel of the secondary carrier during the downlink time period, the processing unit is specifically configured to:

During the downlink time period, monitor the channel of the secondary carrier;

If the carrier signal is monitored within the predetermined time length, confirm that the channel of the secondary carrier is occupied, and perform ECCA on the channel of the secondary carrier;

If no carrier signal is detected within the predetermined time period, the channel of the secondary carrier is occupied.

With reference to the second possible implementation of the first aspect, in a third possible implementation of the first aspect, before performing ECCA on the channel of the secondary carrier in the downlink time period, the processing unit is further configured to:

Record the CCA count value at the end of the previous downlink time period;

When performing ECCA on the channel of the secondary carrier, the processing unit is specifically configured to:

Generate an integer random number as the initial CCA count value, or use the recorded CCA count value at the end of the previous downlink time period as the initial CCA count value;

The CCA count is performed according to the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.

In a second aspect, an embodiment of the present invention provides a UE, including:

A first determining unit, configured to determine at least one secondary carrier configured by the base station for the UE, where the secondary carrier works in an unlicensed frequency band;

The second determining unit is configured to determine division information of uplink and downlink time periods of the secondary carrier, where the division information of uplink and downlink time periods includes division information of downlink time periods and division information of uplink time periods;

The processing unit is configured to perform CCA or ECCA on the channels of the secondary carrier during the uplink time period according to the division information of the uplink and downlink time periods, and stop performing CCA or ECCA on the channels of the secondary carrier during the downlink time period.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the division information of the uplink and downlink time periods further includes division information of conversion gaps between the uplink and downlink time periods;

The processing unit is also used for:

Stop performing CCA or ECCA on the channel of the secondary carrier during the conversion gap.

With reference to the second aspect, in a second possible implementation manner of the second aspect, when performing CCA on the channel of the secondary carrier during the uplink time period, the processing unit is specifically configured to:

During the uplink time period, monitor the channel of the secondary carrier;

If the carrier signal is monitored within the predetermined time length, confirm that the channel of the secondary carrier is occupied, and perform ECCA on the channel of the secondary carrier;

If no carrier signal is detected within the predetermined time period, the channel of the secondary carrier is occupied.

With reference to the second possible implementation of the second aspect, in a third possible implementation of the second aspect, before performing ECCA on the channel of the secondary carrier in the uplink time period, the processing unit is further configured to:

Record the CCA count value at the end of the previous uplink time period;

When performing ECCA on the channel of the secondary carrier, the processing unit is specifically configured to:

Generate an integer random number as the initial CCA count value, or use the recorded CCA count value at the end of the previous uplink time period as the initial CCA count value;

The CCA count is performed according to the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.

In a third aspect, an embodiment of the present invention provides a base station, including:

an occupation unit, configured to occupy a channel of a secondary carrier, and the secondary carrier works in an unlicensed frequency band;

A starting unit, configured to start a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied;

A processing unit, configured to monitor whether there is a carrier signal sent by another base station on the channel of the secondary carrier within the conflict detection gap and the strength of the carrier signal is greater than a preset threshold value; if so, stop occupying all the channel of the secondary carrier; otherwise, continue to occupy the channel of the secondary carrier.

In combination with the third aspect, in the first possible implementation of the third aspect,

The N is an integer random number; or,

The N is a preset integer value; or,

The N is determined according to the cell identity corresponding to the secondary carrier.

In a fourth aspect, an embodiment of the present invention provides a UE, including:

an occupation unit, configured to occupy a channel of a secondary carrier, and the secondary carrier works in an unlicensed frequency band;

A starting unit, configured to start a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied;

A processing unit, configured to monitor whether there is a carrier signal sent by another UE on the channel of the secondary carrier within the conflict detection gap and the strength of the carrier signal is greater than a preset threshold value; if so, stop occupying the secondary carrier the channel of the secondary carrier; otherwise, continue to occupy the channel of the secondary carrier.

In combination with the fourth aspect, in the first possible implementation of the fourth aspect,

The N is an integer random number; or,

The N is a preset integer value; or,

The N is determined according to the cell identity corresponding to the secondary carrier.

In a fifth aspect, an embodiment of the present invention provides a base station, including:

A processor, configured to configure at least one secondary carrier for the UE, where the secondary carrier works in an unlicensed frequency band; determine division information of uplink and downlink time periods of the secondary carrier, and the division information of uplink and downlink time periods includes downlink time periods The division information of the uplink time period and the division information of the uplink time period; according to the division information of the uplink and downlink time period, perform CCA or ECCA on the channel of the secondary carrier during the downlink time period, and stop the channel of the secondary carrier during the uplink time period The channel performs CCA or ECCA.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the division information of the uplink and downlink time periods further includes division information of conversion gaps between the uplink and downlink time periods;

The processor is also used to:

Stop performing CCA or ECCA on the channel of the secondary carrier during the conversion gap.

With reference to the fifth aspect, in a second possible implementation manner of the fifth aspect, when performing CCA on the channel of the secondary carrier during the downlink time period, the processor is specifically configured to:

During the downlink time period, monitor the channel of the auxiliary carrier;

If the carrier signal is monitored within the predetermined time length, confirm that the channel of the secondary carrier is occupied, and perform ECCA on the channel of the secondary carrier;

If no carrier signal is detected within the predetermined time period, the channel of the secondary carrier is occupied.

With reference to the second possible implementation of the fifth aspect, in a third possible implementation of the fifth aspect, before performing ECCA on the channel of the secondary carrier in the downlink time period, the processor is further configured to:

Record the CCA count value at the end of the previous downlink time period;

When performing ECCA on the channel of the secondary carrier, the processor is specifically configured to:

Generate an integer random number as the initial CCA count value, or use the recorded CCA count value at the end of the previous downlink time period as the initial CCA count value;

The CCA count is performed according to the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.

In a sixth aspect, an embodiment of the present invention provides = a UE, including:

A processor, configured to determine at least one secondary carrier configured by the base station for the UE, where the secondary carrier works in an unlicensed frequency band; determine division information of the uplink and downlink time periods of the secondary carrier, and the division of the uplink and downlink time periods The information includes the division information of the downlink time period and the division information of the uplink time period; according to the division information of the uplink and downlink time periods, perform CCA or ECCA on the channel of the secondary carrier during the uplink time period, and stop performing CCA or ECCA on the channel of the secondary carrier during the downlink time period. The channel of the secondary carrier performs CCA or ECCA.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the division information of the uplink and downlink time periods further includes division information of conversion gaps between the uplink and downlink time periods;

The processor is also used to:

Stop performing CCA or ECCA on the channel of the secondary carrier during the conversion gap.

With reference to the sixth aspect, in a second possible implementation manner of the sixth aspect, when performing CCA on the channel of the secondary carrier during the uplink time period, the processor is specifically configured to:

During the uplink time period, monitor the channel of the secondary carrier;

If the carrier signal is monitored within the predetermined time length, confirm that the channel of the secondary carrier is occupied, and perform ECCA on the channel of the secondary carrier;

If no carrier signal is detected within the predetermined time period, the channel of the secondary carrier is occupied.

With reference to the second possible implementation of the sixth aspect, in a third possible implementation of the sixth aspect, before performing ECCA on the channel of the secondary carrier during the uplink time period, the processor is further configured to:

Record the CCA count value at the end of the previous uplink time period;

When performing ECCA on the channel of the secondary carrier, the processor is specifically configured to:

Generate an integer random number as the initial CCA count value, or use the recorded CCA count value at the end of the previous uplink time period as the initial CCA count value;

The CCA count is performed according to the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.

In a seventh aspect, an embodiment of the present invention provides a base station, including:

The processor is configured to occupy a channel of a secondary carrier, and the secondary carrier works in an unlicensed frequency band; at the Nth symbol after the channel of the secondary carrier is occupied, start a collision detection gap; in the collision detection gap within, monitor whether there is a carrier signal sent by other base stations on the channel of the secondary carrier and the strength of the carrier signal is greater than the preset threshold value; if so, stop occupying the channel of the secondary carrier; otherwise, continue to occupy the channel of the secondary carrier channel of the secondary carrier.

In combination with the seventh aspect, in the first possible implementation of the seventh aspect,

The N is an integer random number; or,

The N is a preset integer value; or,

The N is determined according to the cell identity corresponding to the secondary carrier.

In an eighth aspect, an embodiment of the present invention provides a UE, including:

The processor is configured to occupy a channel of a secondary carrier, and the secondary carrier works in an unlicensed frequency band; at the Nth symbol after the channel of the secondary carrier is occupied, start a collision detection gap; in the collision detection gap within the period, monitor whether there is a carrier signal sent by other UEs on the channel of the secondary carrier and the strength of the carrier signal is greater than the preset threshold value; if so, stop occupying the channel of the secondary carrier; otherwise, continue to occupy the channel of the secondary carrier channel of the secondary carrier.

In combination with the eighth aspect, in the first possible implementation of the eighth aspect,

The N is an integer random number; or,

The N is a preset integer value; or,

The N is determined according to the cell identity corresponding to the secondary carrier.

In the ninth aspect, the embodiment of the present invention provides a method for implementing LBT based on a mobile communication system, including:

The base station configures at least one secondary carrier for the UE, and the secondary carrier works in an unlicensed frequency band;

determining, by the base station, division information of uplink and downlink time periods of the secondary carrier, where the division information of uplink and downlink time periods includes division information of downlink time periods and division information of uplink time periods;

The base station performs CCA or ECCA on the channels of the auxiliary carrier in the downlink time period according to the division information of the uplink and downlink time periods, and stops performing CCA or ECCA on the channels of the auxiliary carrier in the uplink time period.

With reference to the ninth aspect, in a first possible implementation manner of the ninth aspect, the division information of the uplink and downlink time periods further includes division information of conversion gaps between the uplink and downlink time periods;

The method also includes:

The base station stops performing CCA or ECCA on the channel of the secondary carrier during the switching gap.

With reference to the ninth aspect, in a second possible implementation manner of the ninth aspect, performing CCA on the channel of the secondary carrier during the downlink time period includes:

During the downlink time period, monitor the channel of the auxiliary carrier;

If the carrier signal is monitored within the predetermined time length, confirm that the channel of the secondary carrier is occupied, and perform ECCA on the channel of the secondary carrier;

If no carrier signal is detected within the predetermined time period, the channel of the secondary carrier is occupied.

With reference to the second possible implementation of the ninth aspect, in the third possible implementation of the ninth aspect, before performing ECCA on the channel of the secondary carrier in the downlink time period, the method further includes:

Record the CCA count value at the end of the previous downlink time period;

Execute ECCA on the channel of the auxiliary carrier, including:

Generate an integer random number as the initial CCA count value, or use the recorded CCA count value at the end of the previous downlink time period as the initial CCA count value;

The CCA count is performed according to the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.

In the tenth aspect, the embodiment of the present invention provides a method for implementing LBT based on a mobile communication system, including:

The UE determines at least one secondary carrier configured by the base station for the UE, and the secondary carrier works in an unlicensed frequency band;

The UE determines division information of uplink and downlink time periods of the secondary carrier, where the division information of uplink and downlink time periods includes division information of downlink time periods and division information of uplink time periods;

The UE performs CCA or ECCA on the channels of the secondary carrier during the uplink time period according to the division information of the uplink and downlink time periods, and stops performing CCA or ECCA on the channels of the secondary carrier during the downlink time period.

With reference to the tenth aspect, in a first possible implementation manner of the tenth aspect, the division information of the uplink and downlink time periods further includes division information of conversion gaps between the uplink and downlink time periods;

The method also includes:

The UE stops performing CCA or ECCA on the channel of the secondary carrier during the switching gap.

With reference to the tenth aspect, in a second possible implementation manner of the tenth aspect, performing CCA on the channel of the secondary carrier during the uplink time period includes:

During the uplink time period, monitor the channel of the auxiliary carrier;

If the carrier signal is monitored within the predetermined time length, confirm that the channel of the secondary carrier is occupied, and perform ECCA on the channel of the secondary carrier;

If no carrier signal is detected within the predetermined time period, the channel of the secondary carrier is occupied.

With reference to the second possible implementation of the tenth aspect, in the third possible implementation of the tenth aspect, before performing ECCA on the channel of the secondary carrier during the uplink time period, the method further includes:

Record the CCA count value at the end of the previous uplink time period;

Execute ECCA on the channel of the auxiliary carrier, including:

Generate an integer random number as the initial CCA count value, or use the recorded CCA count value at the end of the previous uplink time period as the initial CCA count value;

The CCA count is performed according to the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.

In the eleventh aspect, the embodiment of the present invention provides a method for implementing LBT based on a mobile communication system, including:

The base station occupies the channel of the secondary carrier, and the secondary carrier works in an unlicensed frequency band;

The base station starts a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied;

The base station monitors whether there is a carrier signal sent by another base station on the secondary carrier channel within the conflict detection gap and the strength of the carrier signal is greater than a preset threshold value;

If so, stop occupying the channel of the secondary carrier;

Otherwise, continue to occupy the channel of the secondary carrier.

In combination with the eleventh aspect, in the first possible implementation of the eleventh aspect,

The N is an integer random number; or,

The N is a preset integer value; or,

The N is determined according to the cell identity corresponding to the secondary carrier.

In a twelfth aspect, the embodiment of the present invention provides a method for implementing LBT based on a mobile communication system, including:

The UE occupies the channel of the secondary carrier, and the secondary carrier works in an unlicensed frequency band;

The UE starts a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied;

The UE monitors whether there is a carrier signal sent by another UE on the channel of the secondary carrier within the conflict detection gap and the strength of the carrier signal is greater than a preset threshold value;

If so, stop occupying the channel of the secondary carrier;

Otherwise, continue to occupy the channel of the secondary carrier.

In combination with the twelfth aspect, in the first possible implementation of the twelfth aspect,

The N is an integer random number; or,

The N is a preset integer value; or,

The N is determined according to the cell identity corresponding to the secondary carrier.

Utilizing the solution provided by the embodiment of the present invention, the competition time period between the UE and the base station is divided according to the uplink and downlink transmission sections, and it is stipulated that the UE only competes for the unlicensed spectrum in the uplink time period, and the base station only competes for the unlicensed spectrum in the downlink time period, so that the LBT mechanism It can be more efficiently applied to a mobile communication system with independent uplink and downlink time periods. In addition, using the solution provided by the embodiment of the present invention, after the base station or UE occupies the channel, by determining a collision detection gap, monitor whether there is a carrier signal sent by other base stations or UEs on the channel in the conflict detection gap, and determine the follow-up channel based on the monitoring result. Whether to continue to send signals, thereby reducing the probability of channel occupation conflicts between multiple base stations or multiple UEs.

Description of drawings

FIG. 1 is a schematic diagram of channel occupancy conflicts occurring among multiple base stations in the prior art;

FIG. 2A, FIG. 2B, and FIG. 2C are system architecture diagrams of application scenarios applicable to embodiments of the present invention;

FIG. 3 is a schematic structural diagram of a base station implementing an LBT mechanism provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a UE implementing an LBT mechanism provided by an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a base station that solves the problem of channel occupancy conflicts between base stations provided by an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a UE that solves the problem of channel occupancy conflicts between UEs provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of another base station implementing an LBT mechanism provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of another UE implementing an LBT mechanism provided by an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of another base station that solves the problem of channel occupancy conflicts between base stations provided by an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of another UE that solves the problem of channel occupancy conflicts between UEs provided by an embodiment of the present invention;

FIG. 11 is a flow chart of a base station side method for implementing the LBT mechanism provided by an embodiment of the present invention;

12 is a schematic diagram of a base station regenerating a random number as an initial CCA count value during a downlink period according to an embodiment of the present invention;

13 is a schematic diagram of a base station using the recorded CCA count value as the initial CCA count value during the downlink time period according to an embodiment of the present invention;

FIG. 14 is a flow chart of a UE-side method for implementing the LBT mechanism provided by an embodiment of the present invention;

FIG. 15 is a schematic diagram of a UE regenerating a random number as an initial CCA count value during an uplink period according to an embodiment of the present invention;

FIG. 16 is a schematic diagram of a UE using the recorded CCA count value as the initial CCA count value during the uplink time period according to an embodiment of the present invention;

FIG. 17 is a flow chart of a method for solving the problem of channel occupancy conflicts between base stations provided by an embodiment of the present invention;

FIG. 18 is a schematic diagram of an effect of reducing the probability of channel occupancy conflicts between base stations provided by an embodiment of the present invention;

FIG. 19 is a flow chart of a method for solving the problem of channel occupancy conflicts between UEs provided by an embodiment of the present invention;

FIG. 20 is a schematic diagram of an effect of reducing the probability of channel occupancy conflicts between UEs provided by an embodiment of the present invention.

Detailed ways

Embodiments of the present invention provide a base station, UE and method for implementing LBT based on a mobile communication system. The competition time period between the UE and the base station is divided according to the uplink and downlink transmission sections. The downlink time period competes for the unlicensed spectrum, so that the LBT mechanism can be more efficiently applied to mobile communication systems with independent uplink and downlink time periods.

The embodiment of the present invention also provides a base station, UE and method for implementing LBT based on a mobile communication system. After the base station or UE occupies a channel, a collision detection gap (English: Collision Detection Gap) is determined to monitor the LBT in the collision detection gap. Whether there are carrier signals sent by other base stations on the channel, and determine whether to continue to send signals according to the monitoring results, thereby reducing the probability of channel occupation conflicts between multiple base stations or multiple UEs.

The technical solutions of the embodiments of the present invention can be applied to the following three system architectures:

Scenario 1: Referring to FIG. 2A , it is a single-base station communication scenario in the LTE system. UE is connected to the core network through a single base station, and the base station is directly connected to the core network.

Scenario 2: As shown in Figure 2B, it is a multi-base station communication scenario in the LTE system. UE is connected to the core network through multiple base stations, and the multiple base stations are kept connected, and at least one of the multiple base stations directly communicates with the core network. network connection.

Scenario 3: Referring to FIG. 2C , it is a communication scenario in other systems (such as 2G, 3G, etc.), UE is connected to a base station controller through a base station, and the base station controller is connected to a core network.

In the technical solution of the present invention, the UE, which can also be referred to as a mobile phone, a mobile terminal (Mobile Terminal) or a mobile device, etc., includes a wireless transceiver function, and can cooperate with network equipment to provide communication services for users.

The base station can be an evolved node (English: eNodeB, abbreviated: eNB) in the LTE system, or a radio network controller (English: Radio Network Controller, abbreviated: RNC) in the 3G system, or a Base station controller (English: Base Station Controller, referred to as: BSC). It is used to receive the data sent by the UE and send it to the base station controller, core network equipment, or the corresponding main base station.

The technical solutions of the present invention will be described below in conjunction with the accompanying drawings and various embodiments.

Embodiment one

As shown in FIG. 3, an embodiment of the present invention provides a base station 3, which can make the LBT mechanism applicable to a mobile communication system with independent uplink and downlink time periods. The base station 3 includes:

The configuration unit 31 is configured to configure at least one secondary carrier for the UE, where the secondary carrier works in an unlicensed frequency band.

The determining unit 32 is configured to determine division information of uplink and downlink time periods of the auxiliary carrier, where the division information of uplink and downlink time periods includes division information of downlink time periods and division information of uplink time periods.

The processing unit 33 is configured to perform CCA or ECCA on the channel of the auxiliary carrier in the downlink time period according to the division information of the uplink and downlink time periods, and stop performing CCA or ECCA on the channel of the auxiliary carrier in the uplink time period .

Optionally, the division information of the uplink and downlink time periods may further include division information of transition gaps (English: GAP) between the uplink and downlink time periods.

Optionally, the processing unit 33 is further configured to: stop performing CCA or ECCA on the channel of the secondary carrier during the switching gap.

Optionally, when performing CCA on the channel of the auxiliary carrier during the downlink time period, the processing unit 33 is specifically configured to: monitor the channel of the auxiliary carrier during the downlink time period; signal, confirm that the channel of the secondary carrier is occupied, and perform ECCA on the channel of the secondary carrier; if no carrier signal is detected within a predetermined time period, then occupy the channel of the secondary carrier.

Optionally, before ECCA is performed on the channel of the secondary carrier in the downlink time period, the processing unit 133 is further configured to: record the CCA count value at the end of the previous downlink time period.

Optionally, when performing ECCA on the channel of the auxiliary carrier, the processing unit 33 is specifically configured to: generate an integer random number as an initial CCA count value, or record the CCA at the end of the previous downlink time period The count value is used as an initial CCA count value; the CCA count is performed according to the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.

For example, the so-called CCA count can be decremented by one according to the following process until the initial CCA count value is reduced to zero: at the end of each predetermined time length, it is judged whether the carrier signal is monitored within the predetermined time length at the end , if yes, decrement the CCA count value by one, otherwise, keep the CCA count value unchanged.

The first embodiment above provides a base station capable of implementing an LBT mechanism in a mobile communication system with independent uplink and downlink time periods.

Embodiment two

As shown in FIG. 4, an embodiment of the present invention provides a UE4, which can make the LBT mechanism applicable to a mobile communication system with independent uplink and downlink time periods. The UE4 includes:

The first determining unit 41 is configured to determine at least one secondary carrier configured by the base station for the UE, where the secondary carrier works in an unlicensed frequency band.

The second determination unit 42 is configured to determine division information of uplink and downlink time periods of the auxiliary carrier, where the division information of uplink and downlink time periods includes division information of downlink time periods and division information of uplink time periods.

The processing unit 43 is configured to perform CCA or ECCA on the channels of the secondary carrier during the uplink time period according to the division information of the uplink and downlink time periods, and stop performing CCA or ECCA on the channels of the secondary carrier during the downlink time period .

Optionally, the division information of the uplink and downlink time periods further includes division information of transition gaps between the uplink and downlink time periods.

Optionally, the processing unit 43 is further configured to: stop performing CCA or ECCA on the channel of the secondary carrier during the conversion gap.

Optionally, when performing CCA on the channel of the secondary carrier during the uplink time period, the processing unit 43 is specifically configured to: monitor the channel of the secondary carrier during the uplink time period; signal, confirm that the channel of the secondary carrier is occupied, and perform ECCA on the channel of the secondary carrier; if no carrier signal is detected within a predetermined time period, then occupy the channel of the secondary carrier.

Optionally, before performing ECCA on the channel of the secondary carrier in the uplink time period, the processing unit 43 is further configured to: record the CCA count value at the end of the previous uplink time period.

Optionally, when performing ECCA on the channel of the auxiliary carrier, the processing unit 43 is specifically configured to: generate an integer random number as an initial CCA count value, or record the CCA at the end of the previous uplink time period The count value is used as an initial CCA count value; the CCA count is performed according to the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.

For example, the so-called CCA count can be decremented by one according to the following process until the initial CCA count value is reduced to zero: at the end of each predetermined time length, it is judged whether the carrier signal is monitored within the predetermined time length at the end , if yes, decrement the CCA count value by one, otherwise, keep the CCA count value unchanged.

The second embodiment above provides a UE capable of implementing the LBT mechanism in a mobile communication system with independent uplink and downlink time periods.

Embodiment Three

As shown in FIG. 5, an embodiment of the present invention provides a base station 5, which can solve the problem of channel occupancy conflicts between base stations. The base station 5 includes:

The occupying unit 51 is configured to occupy a channel of a secondary carrier, and the secondary carrier works in an unlicensed frequency band.

The starting unit 52 is configured to start a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied.

The processing unit 53 is configured to monitor whether there is a carrier signal sent by another base station on the channel of the secondary carrier within the conflict detection gap and the strength of the carrier signal is greater than a preset threshold value; if so, stop occupying the channel of the secondary carrier; otherwise, continue to occupy the channel of the secondary carrier.

Wherein, the N is an integer random number; or, the N is a preset integer value; or, the N is determined according to the cell identity corresponding to the secondary carrier.

Embodiment 3 above provides a base station that can reduce the probability of channel occupation conflicts occurring before multiple base stations after the LBT mechanism is applied to a mobile communication system.

Embodiment Four

As shown in FIG. 6, an embodiment of the present invention provides a UE6 for solving the problem of channel occupation conflict between UEs. The UE6 includes:

The occupying unit 61 is configured to occupy a channel of a secondary carrier, and the secondary carrier works in an unlicensed frequency band.

The starting unit 62 is configured to start a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied.

The processing unit 63 is configured to monitor whether there is a carrier signal sent by other UEs on the channel of the secondary carrier within the conflict detection gap and the strength of the carrier signal is greater than a preset threshold value; if so, stop occupying the channel of the secondary carrier; otherwise, continue to occupy the channel of the secondary carrier.

Wherein, the N is an integer random number; or, the N is a preset integer value; or, the N is determined according to the cell identity corresponding to the secondary carrier.

Embodiment 4 above provides a UE that can reduce the probability of channel occupation conflicts occurring before multiple UEs after the LBT mechanism is applied to the mobile communication system.

Embodiment five

As shown in FIG. 7, an embodiment of the present invention provides a base station 7, which can make the LBT mechanism applicable to a mobile communication system with independent uplink and downlink time periods. The base station 7 includes:

Processor 71, configured to configure at least one secondary carrier for the UE, the secondary carrier works in an unlicensed frequency band; determine the division information of the uplink and downlink time periods of the secondary carrier, and the division information of the uplink and downlink time periods includes downlink time segment division information and uplink time period division information; according to the uplink and downlink time period division information, perform CCA or ECCA on the channel of the secondary carrier during the downlink time period, and stop performing CCA or ECCA on the secondary carrier channel during the uplink time period The channel performs CCA or ECCA.

Optionally, the division information of the uplink and downlink time periods further includes division information of transition gaps between the uplink and downlink time periods.

Optionally, the processor 71 is further configured to: stop performing CCA or ECCA on the channel of the secondary carrier during the conversion gap.

Optionally, when performing CCA on the channel of the auxiliary carrier during the downlink time period, the processor 171 is specifically configured to: monitor the channel of the auxiliary carrier during the downlink time period; signal, confirm that the channel of the secondary carrier is occupied, and perform ECCA on the channel of the secondary carrier; if no carrier signal is detected within a predetermined time period, then occupy the channel of the secondary carrier.

Optionally, before performing ECCA on the channel of the secondary carrier in the downlink time period, the processor 71 is further configured to: record the CCA count value at the end of the previous downlink time period.

Optionally, when performing ECCA on the channel of the auxiliary carrier, the processor 71 is specifically configured to: generate an integer random number as an initial CCA count value, or record the CCA at the end of the previous downlink time period The count value is used as an initial CCA count value; the CCA count is performed according to the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.

For example, the so-called CCA count can be decremented by one according to the following process until the initial CCA count value is reduced to zero: at the end of each predetermined time length, it is judged whether the carrier signal is monitored within the predetermined time length at the end , if yes, decrement the CCA count value by one, otherwise, keep the CCA count value unchanged.

The fifth embodiment above provides a base station capable of implementing an LBT mechanism in a mobile communication system with independent uplink and downlink time periods.

Embodiment six

As shown in FIG. 8, an embodiment of the present invention provides a UE8, which can make the LBT mechanism applicable to a mobile communication system with independent uplink and downlink time periods. The UE8 includes:

The processor 81 is configured to determine at least one secondary carrier configured by the base station for the UE, the secondary carrier works in an unlicensed frequency band; determine division information of the uplink and downlink time periods of the secondary carrier, and the uplink and downlink time periods of the secondary carrier The division information includes the division information of the downlink time period and the division information of the uplink time period; according to the division information of the uplink and downlink time periods, perform CCA or ECCA on the channel of the secondary carrier during the uplink time period, and stop during the downlink time period performing CCA or ECCA on the channels of the secondary carrier.

Optionally, the division information of the uplink and downlink time periods further includes division information of transition gaps between the uplink and downlink time periods.

Optionally, the processor 81 is further configured to: stop performing CCA or ECCA on the channel of the secondary carrier during the conversion gap.

Optionally, when performing CCA on the channel of the auxiliary carrier during the uplink time period, the processor 181 is specifically configured to: monitor the channel of the auxiliary carrier during the uplink time period; signal, confirm that the channel of the secondary carrier is occupied, and perform ECCA on the channel of the secondary carrier; if no carrier signal is detected within a predetermined time period, then occupy the channel of the secondary carrier.

Optionally, before performing ECCA on the channel of the secondary carrier in the uplink time period, the processor 81 is further configured to: record the CCA count value at the end of the previous uplink time period.

Optionally, when performing ECCA on the channel of the auxiliary carrier, the processor 81 is specifically configured to: generate an integer random number as an initial CCA count value, or record the CCA at the end of the previous uplink time period The count value is used as an initial CCA count value; the CCA count is performed according to the initial CCA count value, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.

For example, the so-called CCA count can be decremented by one according to the following process until the initial CCA count value is reduced to zero: at the end of each predetermined time length, it is judged whether the carrier signal is monitored within the predetermined time length at the end , if yes, decrement the CCA count value by one, otherwise, keep the CCA count value unchanged.

The sixth embodiment above provides a UE capable of implementing the LBT mechanism in a mobile communication system with independent uplink and downlink time periods.

Embodiment seven

Referring to FIG. 9, an embodiment of the present invention provides a base station 9 for solving the problem of channel occupation conflicts between base stations. The base station 9 includes:

The processor 91 is configured to occupy a channel of a secondary carrier, the secondary carrier works in an unlicensed frequency band; start a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied; In the gap, monitor whether there is a carrier signal sent by other base stations on the channel of the auxiliary carrier and the strength of the carrier signal is greater than the preset threshold value; if so, stop occupying the channel of the auxiliary carrier; otherwise, continue to occupy The channel of the secondary carrier.

Wherein, the N is an integer random number; or, the N is a preset integer value; or, the N is determined according to the cell identity corresponding to the secondary carrier.

The eleventh embodiment above provides a base station that can reduce the probability of channel occupation conflicts occurring before multiple base stations after the LBT mechanism is applied to a mobile communication system.

Embodiment Eight

As shown in FIG. 10 , an embodiment of the present invention provides a UE10 for solving the problem of channel occupancy conflicts between UEs. The UE10 includes

The processor 101 is configured to occupy a channel of a secondary carrier, and the secondary carrier works in an unlicensed frequency band; start a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied; In the gap, monitor whether there is a carrier signal sent by other UEs on the channel of the secondary carrier and the strength of the carrier signal is greater than the preset threshold value; if so, stop occupying the channel of the secondary carrier; otherwise, continue to occupy The channel of the secondary carrier.

Wherein, the N is an integer random number; or, the N is a preset integer value; or, the N is determined according to the cell identity corresponding to the secondary carrier.

Embodiment nine

Referring to Figure 11, in the embodiment of the present invention, in order to make the LBT mechanism applicable to a mobile communication system with independent uplink and downlink time periods, the implementation process of the base station side is as follows:

Step 1101: the base station configures at least one secondary carrier for the UE, and the secondary carrier works in an unlicensed frequency band.

The secondary carrier is a cell managed by the base station, and the cell can only be configured for the UE to work as the secondary carrier.

Step 1102: The base station determines division information of uplink and downlink time periods of the auxiliary carrier, and the division information of uplink and downlink time periods includes division information of downlink time periods and division information of uplink time periods.

Optionally, the division information of the uplink and downlink time periods may also include division information of transition gaps between uplink and downlink time periods. The division information of the uplink and downlink time periods may be pre-configured inside the UE, and the base station may know it according to the indication information sent by the UE, or the base station may notify the UE after configuration.

Step 1103: The base station performs CCA or ECCA on the channel of the auxiliary carrier in the downlink time period according to the division information of the uplink and downlink time periods, and stops performing CCA or ECCA on the channel of the auxiliary carrier in the uplink time period .

Optionally, if a switching gap is further divided between the uplink and downlink time periods, the base station also needs to stop performing CCA or ECCA on the channel of the secondary carrier during the switching gap.

When entering the downlink time period for the first time, the base station first performs CCA on the channel of the secondary carrier. The specific process is: during the downlink time period, the base station starts CCA and starts to monitor the channel of the secondary carrier. If the carrier signal is monitored on the channel of the secondary carrier within the duration, the base station confirms that the channel of the secondary carrier is occupied, and performs ECCA on the channel of the secondary carrier; if no carrier signal is detected within the predetermined duration, Then the base station occupies the channel of the secondary carrier. The predetermined duration mentioned here is the duration of a CCA observation time window, such as 20us.

After the base station transfers from the CCA stage to the ECCA stage, an integer random number R is first generated as the initial CCA count value, and when R predetermined durations are detected, the channel is considered usable, and the predetermined duration mentioned here is The length of time for a CCA observation window. Specifically, when the base station does not monitor the carrier signal within a CCA observation time window, the current CCA count value is reduced by one, and when the carrier signal is detected within a CCA observation time window, the current CCA count is maintained The value does not change. Further, after the base station decrements the CCA count value by one, it will also judge whether the CCA count value after the decrement is zero, if it is determined that the CCA count value is not zero, then continue to perform CCA counting based on the CCA count value, if it is determined If the CCA count value is zero, the channel of the secondary carrier is occupied.

And if at the end of the downlink time period, the base station still does not occupy the channel of the secondary carrier, the base station can regenerate an integer random number as the initial CCA count value after the start of the next downlink time period, and according to the initial The CCA count value is used for CCA counting, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.

For example, the so-called CCA count can be decremented by one according to the following process until the initial CCA count value is reduced to zero: at the end of each predetermined time length, it is judged whether the carrier signal is monitored within the predetermined time length at the end , if yes, decrement the CCA count value by one, otherwise, keep the CCA count value unchanged.

For example, refer to Figure 12, which is a specific example of the division of uplink and downlink time periods. Assume that the base station fails to perform CCA and transfers to the ECCA stage, and the random number obtained in the ECCA stage is 5. At the end of the downlink time period, the CCA counts If the value is reduced to 3, the base station regenerates a random number after the start of the next downlink time period. Assuming it is 4, the base station starts to monitor the channel again from the state where the CCA count value is 4.

Or, if the base station does not occupy the channel of the secondary carrier at the end of the downlink time period, the base station may also record the previous downlink time before continuing to perform ECCA on the channel of the secondary carrier in the next downlink time period The CCA count value at the end of the segment. After the start of the next downlink time period, the base station will record the CCA count value at the end of the previous downlink time period as the initial CCA count value, and perform CCA counting according to the initial CCA count value, when the initial CCA count value After being reduced to zero, the channel of the secondary carrier is occupied. In this way, the base station does not need to restart the CCA or ECCA in each downlink time period, which improves the access efficiency of the base station to the auxiliary carrier channel.

For example, referring to FIG. 13 , as a specific example of division of uplink and downlink time periods, the base station stops performing CCA or ECCA during a predetermined uplink time period, and starts CCA or ECCA during a predetermined downlink time period. Assuming that the base station fails to perform CCA and transfers to the ECCA stage, and the random number obtained in the ECCA stage is 5, it means that the initial value of the CCA count value is 5, and the base station needs to monitor 5 idle CCA observation time windows (for example: 20us) to occupy channel. Every time the base station monitors an idle CCA observation time window, it subtracts 1 from the CCA count value until the CCA count value decreases to 0, and the base station can occupy the channel. Assuming that when the CCA count value decreases to 3, the current downlink time period ends, the base station records the CCA count of 3 before the next downlink time period starts, and when the next downlink time period begins, the base station continues to start from the CCA count value of 3 The state starts channel monitoring.

The ninth embodiment above divides the competition time period of the base station according to the uplink and downlink transmission sections, and stipulates that the base station only competes for the unlicensed spectrum in the downlink time period, so that the LBT mechanism can be more efficiently applied to the mobile communication system with independent uplink and downlink time periods.

Embodiment ten

Corresponding to the method shown in FIG. 11 , refer to FIG. 14 . In the embodiment of the present invention, in order to make the LBT mechanism applicable to a mobile communication system with independent uplink and downlink time periods, the implementation process on the UE side is as follows:

Step 1401: the UE determines at least one secondary carrier configured by the base station for the UE, and the secondary carrier works in an unlicensed frequency band.

The secondary carrier is a cell managed by the base station, and the cell can only be configured for the UE to work as the secondary carrier.

Step 1402: The UE determines division information of uplink and downlink time periods of the secondary carrier, and the division information of uplink and downlink time periods includes division information of downlink time periods and division information of uplink time periods.

Optionally, the division information of the uplink and downlink time periods may also include division information of transition gaps between uplink and downlink time periods. The division information of the uplink and downlink time periods may be pre-configured inside the UE, or the UE may receive configuration information sent by the base station and determine it according to the configuration information.

Step 1403: The UE performs CCA or ECCA on the channels of the secondary carrier during the uplink time period according to the division information of the uplink and downlink time periods, and stops performing CCA or ECCA on the channels of the secondary carrier during the downlink time period .

Optionally, if a switching gap is further divided between the uplink and downlink time periods, the UE also needs to stop performing CCA or ECCA on the channel of the secondary carrier during the switching gap.

When entering the uplink time period for the first time, the UE first performs CCA on the channel of the secondary carrier. The specific process is: during the uplink time period, the UE starts CCA and starts to monitor the channel of the secondary carrier. If the carrier signal is monitored on the channel of the secondary carrier within the duration, the UE confirms that the channel of the secondary carrier is occupied, and performs ECCA on the channel of the secondary carrier; if no carrier signal is detected within the predetermined duration, Then the UE occupies the channel of the secondary carrier. The predetermined duration mentioned here is the duration of one CCA observation time window.

When the UE transfers from the CCA stage to the ECCA stage, it first generates an integer random number R as the initial CCA count value, and when it monitors for R preset durations, it considers that the channel can be used. The preset duration mentioned here is The length of time for a CCA observation window. Specifically, when the UE does not monitor the carrier signal within a CCA observation time window, the current CCA count value is decremented by one, and when the UE detects the carrier signal within a CCA observation time window, the current CCA count is maintained The value does not change. Further, after the base station decrements the CCA count value by one, it will also judge whether the CCA count value after the decrement is zero, if it is determined that the CCA count value is not zero, then continue to perform CCA counting based on the CCA count value, if it is determined If the CCA count value is zero, the channel of the secondary carrier is occupied.

And if at the end of the uplink time period, the UE still does not occupy the channel of the secondary carrier, the UE can regenerate an integer random number as the initial CCA count value after the start of the next uplink time period, and according to the initial The CCA count value is used for CCA counting, and the channel of the secondary carrier is occupied after the initial CCA count value is reduced to zero.

For example, the so-called CCA count can be decremented by one according to the following process until the initial CCA count value is reduced to zero: at the end of each predetermined time length, it is judged whether the carrier signal is monitored within the predetermined time length at the end , if yes, decrement the CCA count value by one, otherwise, keep the CCA count value unchanged.

For example, refer to Figure 15, which is a specific example of the division of uplink and downlink time periods. Suppose the UE fails to perform CCA and enters the ECCA stage, and the random number obtained in the ECCA stage is 5. At the end of the uplink time period, the CCA counts If the value is reduced to 3, the UE will regenerate a random number after the start of the next uplink time period. Assuming it is 4, the UE will start to monitor the channel again from the state where the CCA count value is 4.

Or, if the UE still does not occupy the channel of the secondary carrier at the end of the uplink time period, the UE may also record the previous uplink time before continuing to perform ECCA on the channel of the secondary carrier in the next uplink time period The CCA count value at the end of the segment. After the start of the next uplink time period, the UE will record the CCA count value at the end of the previous uplink time period as the initial CCA count value, and perform CCA counting according to the initial CCA count value. When the initial CCA count value After being reduced to zero, the channel of the secondary carrier is occupied. In this way, the UE does not need to restart the CCA or ECCA in each uplink time period, which improves the efficiency of the UE in accessing the auxiliary carrier channel.

For example, referring to FIG. 16 , as a specific example of division of uplink and downlink time periods, the UE suspends CCA or ECCA during a predetermined downlink time period, and starts CCA or ECCA during a predetermined uplink time period. Assuming that the UE fails to perform CCA and transfers to the ECCA stage and the random number obtained in the ECCA stage is 5, it means that the initial value of the CCA count value is 5, and the UE needs to monitor 5 idle CCA observation time windows (for example: 20us) to occupy channel. Every time the UE detects an idle CCA observation time window, it subtracts 1 from the CCA count value until the CCA count value decreases to 0, and the UE can occupy the channel. Assuming that when the CCA count value decreases to 3, the current uplink time period ends, the UE records the CCA count of 3 before the start of the next uplink time period, and at the beginning of the next uplink time period, the UE continues to start from the CCA count value of 3 The state starts channel monitoring.

The tenth embodiment above divides the UE's contention time period according to the uplink and downlink transmission sections, and stipulates that the UE only competes for the unlicensed spectrum in the uplink time period, so that the LBT mechanism can be more efficiently applied to the mobile communication system with independent uplink and downlink time periods.

Embodiment Eleven

Referring to Fig. 17, in the embodiment of the present invention, in order to solve the problem of channel occupancy conflicts between base stations after the LBT mechanism is applied to the mobile communication system, the implementation process of the base station side is as follows:

Step 1701: The base station occupies a channel of a secondary carrier; the secondary carrier works in an unlicensed frequency band.

The secondary carrier is a cell managed by the base station, and the cell can only be configured for the UE to work as the secondary carrier.

Step 1702: The base station starts a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied.

Specifically, the N may be an integer random number, or a preset integer value, or may be determined according to the cell identity corresponding to the secondary carrier, and the cell identity includes a public land mobile network (English: Public Land Mobile Network, PLMN for short) identifier and/or physical cell identifier. For example, the cell ID is 125, and if 125 modulo 9=8, then N=8 is determined.

Preferably, the length of the collision detection gap is not greater than the length of one symbol.

Step 1703: The base station monitors whether there is a carrier signal sent by another base station on the secondary carrier channel within the conflict detection gap and the strength of the carrier signal is greater than a preset threshold value; if so, stop occupying the channel of the secondary carrier; otherwise, continue to occupy the channel of the secondary carrier.

For the UE served by the secondary carrier, after determining that the secondary carrier signal starts to be sent, the UE determines a collision detection gap position, and performs data receiving and decoding according to the gap position. Specifically, the UE determines the position of the collision detection gap, that is, determines a collision detection gap started by the base station at the Nth symbol after the channel of the secondary carrier is occupied, and the N is determined by the base station Notify the UE after being determined, the N may be an integer random number, or a preset integer value, or may be determined according to the cell identity corresponding to the secondary carrier, the cell identity Including PLMN ID and/or physical cell ID. For example, the cell ID is 125, and if 125 modulo 9=8, then N=8 is determined. Subsequently, after receiving the secondary carrier signal, the UE performs data decoding after deducting the gap position.

Optionally, further, after the base station stops occupying the channel of the secondary carrier, it further includes notifying UEs served by the secondary carrier to stop receiving signals of the secondary carrier.

As shown in Figure 18, after the base station in the eleventh embodiment above occupies the channel of the auxiliary carrier, by determining a conflict detection gap, the channel monitors whether there are carrier signals sent by other base stations in the conflict detection gap, and determines the follow-up channel according to the monitoring result. Whether to continue to send signals, thereby reducing the probability of channel occupation conflicts among multiple base stations.

Embodiment 12

Corresponding to the method shown in FIG. 17, refer to FIG. 19. In the embodiment of the present invention, in order to solve the problem of channel occupancy conflicts between UEs after the LBT mechanism is applied to the mobile communication system, the implementation process on the UE side is as follows :

Step 1901: UE occupies a channel of a secondary carrier, and the secondary carrier works in an unlicensed frequency band.

The secondary carrier is a cell managed by the base station, and the cell can only be configured for the UE to work as the secondary carrier.

Step 1902: The UE starts a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied.

Specifically, the N may be an integer random number, or a preset integer value, or may be determined according to the cell identity corresponding to the secondary carrier, and the cell identity includes the PLMN identity and/or or physical cell identity. For example, the cell ID is 125, and if 125 modulo 9=8, then N=8 is determined.

Preferably, the length of the collision detection gap is not greater than the length of one symbol.

Step 1903: The UE monitors whether there is a carrier signal sent by other UEs on the channel of the secondary carrier within the conflict detection gap and the strength of the carrier signal is greater than a preset threshold value; if so, stop occupying the channel of the secondary carrier; otherwise, continue to occupy the channel of the secondary carrier.

As shown in FIG. 20 , in the above-mentioned embodiment 12, after occupying the channel of the secondary carrier, the UE determines a collision detection gap, monitors the channel for carrier signals sent by other UEs in the collision detection gap, and determines whether the follow-up Continue to send signals, thereby reducing the probability of channel occupancy conflicts among multiple UEs.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

While preferred embodiments of the invention have been described, additional changes and modifications to these embodiments can be made by those skilled in the art once the basic inventive concept is appreciated. Therefore, it is intended that the appended claims be construed to cover the preferred embodiment as well as all changes and modifications which fall within the scope of the invention.

Apparently, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the embodiments of the present invention. In this way, if the modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (36)

1. A base station, comprising:

a configuration unit, configured to configure at least one secondary carrier for a user equipment, where the secondary carrier operates in an unlicensed frequency band;

a determining unit, configured to determine dividing information of uplink and downlink time periods of the secondary carrier, where the dividing information of the uplink and downlink time periods includes dividing information of the downlink time period and dividing information of the uplink time period;

and the processing unit is used for executing CCA (clear channel assessment) or ECCA (extended clear channel assessment) on the channel of the auxiliary carrier in the downlink time period and stopping executing CCA or ECCA on the channel of the auxiliary carrier in the uplink time period according to the dividing information of the uplink time period and the downlink time period.

2. The base station of claim 1, wherein the division information of the uplink and downlink time periods further includes division information of a transition gap between the uplink and downlink time periods;

the processing unit is further to:

stopping performing CCA or ECCA on the channel of the secondary carrier at the transition gap.

3. The base station of claim 1, wherein when the CCA is performed on the channel of the secondary carrier in the downlink time period, the processing unit is specifically configured to:

monitoring a channel of the auxiliary carrier in a downlink time period;

if a carrier signal is monitored within a preset time, confirming that a channel of the auxiliary carrier is occupied, and executing ECCA on the channel of the auxiliary carrier;

and if the carrier signal is not monitored within the preset time, occupying the channel of the auxiliary carrier.

4. The base station of claim 3, wherein prior to performing ECCA on the channels of the secondary carrier for a downlink time period, the processing unit is further to:

recording a CCA count value of the end moment of the previous downlink time period;

when performing ECCA on the channel of the secondary carrier, the processing unit is specifically configured to:

generating an integer random number as an initial CCA count value, or taking a recorded CCA count value of the end time of the previous downlink time period as an initial CCA count value;

performing CCA counting according to the initial CCA counting value, and occupying the channel of the auxiliary carrier after the initial CCA counting value is reduced to zero;

the performing CCA counting according to the initial CCA count value includes:

and after each preset time length is finished, judging whether the carrier signal is monitored in the finished preset time length, if so, subtracting one from the CCA count value, and otherwise, keeping the CCA count value unchanged.

5. A user device, comprising:

a first determining unit, configured to determine at least one secondary carrier configured by a base station for the user equipment, where the secondary carrier operates in an unlicensed frequency band;

a second determining unit, configured to determine division information of an uplink time period and a downlink time period of the secondary carrier, where the division information of the uplink time period and the downlink time period includes division information of the downlink time period and division information of the uplink time period;

and the processing unit is used for executing CCA (clear channel assessment) or ECCA (extended clear channel assessment) on the channel of the auxiliary carrier in the uplink time period and stopping executing CCA or ECCA on the channel of the auxiliary carrier in the downlink time period according to the dividing information of the uplink time period and the downlink time period.

6. The UE of claim 5, wherein the partitioning information of the uplink and downlink time periods further includes partitioning information of a transition gap between the uplink and downlink time periods;

the processing unit is further to:

stopping performing CCA or ECCA on the channel of the secondary carrier at the transition gap.

7. The ue of claim 5, wherein when performing CCA on the channel of the secondary carrier in the uplink time period, the processing unit is specifically configured to:

monitoring a channel of the auxiliary carrier in an uplink time period;

if a carrier signal is monitored within a preset time, confirming that a channel of the auxiliary carrier is occupied, and executing ECCA on the channel of the auxiliary carrier;

and if the carrier signal is not monitored within the preset time, occupying the channel of the auxiliary carrier.

8. The user equipment of claim 7, wherein prior to performing ECCA on the channel of the secondary carrier in an uplink time period, the processing unit is further to:

recording a CCA count value of the end moment of the previous uplink time period;

when performing ECCA on the channel of the secondary carrier, the processing unit is specifically configured to:

generating an integer random number as an initial CCA count value, or taking a recorded CCA count value of the end time of the previous uplink time period as an initial CCA count value;

performing CCA counting according to the initial CCA counting value, and occupying the channel of the auxiliary carrier after the initial CCA counting value is reduced to zero;

the performing CCA counting according to the initial CCA count value includes:

and after each preset time length is finished, judging whether the carrier signal is monitored in the finished preset time length, if so, subtracting one from the CCA count value, and otherwise, keeping the CCA count value unchanged.

9. A base station, comprising:

an occupation unit, configured to occupy a channel of an auxiliary carrier, where the auxiliary carrier operates in an unlicensed frequency band;

a starting unit, configured to start a collision detection gap at an nth symbol after a channel of the secondary carrier is occupied;

a processing unit, configured to monitor whether a carrier signal sent by another base station exists on a channel of the secondary carrier and an intensity of the carrier signal is greater than a preset threshold in the collision detection gap; if so, stopping occupying the channel of the auxiliary carrier; otherwise, continuing to occupy the channel of the auxiliary carrier.

10. The base station of claim 9,

n is an integer random number; or,

the N is a preset integer value; or,

and the N is determined according to the cell identification corresponding to the auxiliary carrier.

11. A user device, comprising:

an occupation unit, configured to occupy a channel of an auxiliary carrier, where the auxiliary carrier operates in an unlicensed frequency band;

a starting unit, configured to start a collision detection gap at an nth symbol after a channel of the secondary carrier is occupied;

a processing unit, configured to monitor whether a carrier signal sent by another ue exists on a channel of the secondary carrier and an intensity of the carrier signal is greater than a preset threshold in the collision detection gap; if so, stopping occupying the channel of the auxiliary carrier; otherwise, continuing to occupy the channel of the auxiliary carrier.

12. The user equipment of claim 11,

n is an integer random number; or,

the N is a preset integer value; or,

and the N is determined according to the cell identification corresponding to the auxiliary carrier.

13. A base station, comprising:

a processor, configured to configure at least one secondary carrier for a user equipment, where the secondary carrier operates in an unlicensed frequency band; determining division information of uplink and downlink time periods of the auxiliary carrier, wherein the division information of the uplink and downlink time periods comprises division information of the downlink time period and division information of the uplink time period; and according to the division information of the uplink and downlink time periods, performing CCA or ECCA on the channel of the auxiliary carrier in the downlink time period, and stopping performing CCA or ECCA on the channel of the auxiliary carrier in the uplink time period.

14. The base station of claim 13, wherein the division information of the uplink and downlink time periods further includes division information of a transition gap between the uplink and downlink time periods;

the processor is further configured to:

stopping performing CCA or ECCA on the channel of the secondary carrier at the transition gap.

15. The base station of claim 13, wherein when performing CCA for the channel of the secondary carrier for the downlink time period, the processor is specifically configured to:

monitoring a channel of the auxiliary carrier in a downlink time period;

if a carrier signal is monitored within a preset time, confirming that a channel of the auxiliary carrier is occupied, and executing ECCA on the channel of the auxiliary carrier;

and if the carrier signal is not monitored within the preset time, occupying the channel of the auxiliary carrier.

16. The base station of claim 15, wherein prior to performing ECCA on the channel of the secondary carrier for the downlink time period, the processor is further configured to:

recording a CCA count value of the end moment of the previous downlink time period;

when performing ECCA on the channel of the secondary carrier, the processor is specifically configured to:

generating an integer random number as an initial CCA count value, or taking a recorded CCA count value of the end time of the previous downlink time period as an initial CCA count value;

performing CCA counting according to the initial CCA counting value, and occupying the channel of the auxiliary carrier after the initial CCA counting value is reduced to zero;

the performing CCA counting according to the initial CCA count value includes:

and after each preset time length is finished, judging whether the carrier signal is monitored in the finished preset time length, if so, subtracting one from the CCA count value, and otherwise, keeping the CCA count value unchanged.

17. A user device, comprising:

a processor, configured to determine at least one secondary carrier configured by a base station for the user equipment, where the secondary carrier operates in an unlicensed frequency band; determining division information of uplink and downlink time periods of the auxiliary carrier, wherein the division information of the uplink and downlink time periods comprises division information of the downlink time period and division information of the uplink time period; and according to the dividing information of the uplink and downlink time periods, performing CCA or ECCA on the channel of the auxiliary carrier in the uplink time period, and stopping performing CCA or ECCA on the channel of the auxiliary carrier in the downlink time period.

18. The ue of claim 17, wherein the partitioning information of the uplink and downlink time periods further includes partitioning information of a transition gap between the uplink and downlink time periods;

the processor is further configured to:

stopping performing CCA or ECCA on the channel of the secondary carrier at the transition gap.

19. The user equipment of claim 17, wherein when performing CCA on the channel of the secondary carrier in an uplink time period, the processor is specifically configured to:

monitoring a channel of the auxiliary carrier in an uplink time period;

if a carrier signal is monitored within a preset time, confirming that a channel of the auxiliary carrier is occupied, and executing ECCA on the channel of the auxiliary carrier;

and if the carrier signal is not monitored within the preset time, occupying the channel of the auxiliary carrier.

20. The user equipment of claim 19, wherein prior to performing ECCA on the channel of the secondary carrier in an uplink time period, the processor is further configured to:

recording a CCA count value of the end moment of the previous uplink time period;

when performing ECCA on the channel of the secondary carrier, the processor is specifically configured to:

generating an integer random number as an initial CCA count value, or taking a recorded CCA count value of the end time of the previous uplink time period as an initial CCA count value;

performing CCA counting according to the initial CCA counting value, and occupying the channel of the auxiliary carrier after the initial CCA counting value is reduced to zero;

the performing CCA counting according to the initial CCA count value includes:

and after each preset time length is finished, judging whether the carrier signal is monitored in the finished preset time length, if so, subtracting one from the CCA count value, and otherwise, keeping the CCA count value unchanged.

21. A base station, comprising:

a processor, configured to occupy a channel of an auxiliary carrier, where the auxiliary carrier operates in an unlicensed frequency band; starting a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied; monitoring whether carrier signals sent by other base stations exist on the channels of the auxiliary carriers or not in the conflict detection gaps, wherein the strength of the carrier signals is greater than a preset threshold value; if so, stopping occupying the channel of the auxiliary carrier; otherwise, continuing to occupy the channel of the auxiliary carrier.

22. The base station of claim 21,

n is an integer random number; or,

the N is a preset integer value; or,

and the N is determined according to the cell identification corresponding to the auxiliary carrier.

23. A user device, comprising:

a processor, configured to occupy a channel of an auxiliary carrier, where the auxiliary carrier operates in an unlicensed frequency band; starting a collision detection gap at the Nth symbol after the channel of the secondary carrier is occupied; monitoring whether carrier signals sent by other user equipment exist on the channel of the auxiliary carrier or not in the conflict detection gap, wherein the intensity of the carrier signals is greater than a preset threshold value; if so, stopping occupying the channel of the auxiliary carrier; otherwise, continuing to occupy the channel of the auxiliary carrier.

24. The user equipment of claim 23,

n is an integer random number; or,

the N is a preset integer value; or,

and the N is determined according to the cell identification corresponding to the auxiliary carrier.

25. A method for implementing Listen Before Talk (LBT) based on a mobile communication system is characterized by comprising the following steps:

a base station configures at least one auxiliary carrier for user equipment, wherein the auxiliary carrier works in an unauthorized frequency band;

the base station determines the division information of the uplink and downlink time periods of the auxiliary carrier, wherein the division information of the uplink and downlink time periods comprises the division information of the downlink time period and the division information of the uplink time period;

and the base station executes CCA or ECCA on the channel of the auxiliary carrier in the downlink time period according to the division information of the uplink time period and the downlink time period, and stops executing CCA or ECCA on the channel of the auxiliary carrier in the uplink time period.

26. The method of claim 25, wherein the division information of the uplink and downlink time periods further includes division information of a transition gap between the uplink and downlink time periods;

the method further comprises the following steps:

the base station stops performing CCA or ECCA on the channel of the secondary carrier in the switching gap.

27. The method of claim 25, wherein performing a CCA for the channel of the secondary carrier for a downlink time period comprises:

monitoring a channel of the auxiliary carrier in a downlink time period;

if a carrier signal is monitored within a preset time, confirming that a channel of the auxiliary carrier is occupied, and executing ECCA on the channel of the auxiliary carrier;

and if the carrier signal is not monitored within the preset time, occupying the channel of the auxiliary carrier.

28. The method of claim 27, wherein prior to performing ECCA on the channel of the secondary carrier for a downlink time period, further comprising:

recording a CCA count value of the end moment of the previous downlink time period;

performing ECCA on channels of the secondary carrier, including:

generating an integer random number as an initial CCA count value, or taking a recorded CCA count value of the end time of the previous downlink time period as an initial CCA count value;

performing CCA counting according to the initial CCA counting value, and occupying the channel of the auxiliary carrier after the initial CCA counting value is reduced to zero;

the performing CCA counting according to the initial CCA count value includes:

and after each preset time length is finished, judging whether the carrier signal is monitored in the finished preset time length, if so, subtracting one from the CCA count value, and otherwise, keeping the CCA count value unchanged.

29. A method for implementing Listen Before Talk (LBT) based on a mobile communication system is characterized by comprising the following steps:

the method comprises the steps that user equipment determines at least one auxiliary carrier configured for the user equipment by a base station, wherein the auxiliary carrier works in an unauthorized frequency band;

the user equipment determines the division information of the uplink and downlink time periods of the auxiliary carrier, wherein the division information of the uplink and downlink time periods comprises the division information of the downlink time period and the division information of the uplink time period;

and the user equipment executes CCA or ECCA on the channel of the auxiliary carrier in the uplink time period according to the division information of the uplink time period and the downlink time period, and stops executing CCA or ECCA on the channel of the auxiliary carrier in the downlink time period.

30. The method of claim 29, wherein the division information of the uplink and downlink time periods further includes division information of a transition gap between the uplink and downlink time periods;

the method further comprises the following steps:

the user equipment stops performing CCA or ECCA on the channel of the secondary carrier in the switching gap.

31. The method of claim 29, wherein performing CCA on the channel of the secondary carrier during an uplink time period comprises:

monitoring a channel of the auxiliary carrier in an uplink time period;

if a carrier signal is monitored within a preset time, confirming that a channel of the auxiliary carrier is occupied, and executing ECCA on the channel of the auxiliary carrier;

and if the carrier signal is not monitored within the preset time, occupying the channel of the auxiliary carrier.

32. The method of claim 31, wherein prior to performing ECCA on the channel of the secondary carrier in an uplink time period, further comprising:

recording a CCA count value of the end moment of the previous uplink time period;

performing ECCA on channels of the secondary carrier, including:

generating an integer random number as an initial CCA count value, or taking a recorded CCA count value of the end time of the previous uplink time period as an initial CCA count value;

performing CCA counting according to the initial CCA counting value, and occupying the channel of the auxiliary carrier after the initial CCA counting value is reduced to zero;

the performing CCA counting according to the initial CCA count value includes:

and after each preset time length is finished, judging whether the carrier signal is monitored in the finished preset time length, if so, subtracting one from the CCA count value, and otherwise, keeping the CCA count value unchanged.

33. A method for implementing Listen Before Talk (LBT) based on a mobile communication system is characterized by comprising the following steps:

a base station occupies a channel of an auxiliary carrier, and the auxiliary carrier works in an unauthorized frequency band;

the base station starts a collision detection gap at the Nth symbol after the channel of the auxiliary carrier is occupied;

the base station monitors whether carrier signals sent by other base stations exist on the channel of the auxiliary carrier and the strength of the carrier signals is greater than a preset threshold value in the collision detection interval;

if so, stopping occupying the channel of the auxiliary carrier;

otherwise, continuing to occupy the channel of the auxiliary carrier.

34. The method of claim 33,

n is an integer random number; or,

the N is a preset integer value; or,

and the N is determined according to the cell identification corresponding to the auxiliary carrier.

35. A method for implementing Listen Before Talk (LBT) based on a mobile communication system is characterized by comprising the following steps:

the user equipment occupies a channel of an auxiliary carrier, and the auxiliary carrier works in an unauthorized frequency band;

the user equipment starts a collision detection gap at the Nth symbol after the channel of the auxiliary carrier is occupied;

the user equipment monitors whether carrier signals sent by other user equipment exist on the channel of the auxiliary carrier or not in the conflict detection interval, and the strength of the carrier signals is greater than a preset threshold value;

if so, stopping occupying the channel of the auxiliary carrier;

otherwise, continuing to occupy the channel of the auxiliary carrier.

36. The method of claim 35,

n is an integer random number; or,

the N is a preset integer value; or,

and the N is determined according to the cell identification corresponding to the auxiliary carrier.