CN103298118B - A kind of instruction of running time-frequency resource and confirmation method and device - Google Patents
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Abstract
The present invention relates to the communications field, disclose a kind of instruction of running time-frequency resource and confirmation method and device.The method is: base station notifies the system bandwidth of at least two transfer points to UE, therefrom select the system bandwidth of at least one transfer point as target bandwidth again, and be that UE distributes running time-frequency resource according to this target bandwidth, and in downlink signaling, carry out running time-frequency resource instruction based on this target bandwidth, and after UE reception downlink signaling, adopt the mode of blind check from the system bandwidth of at least two transfer points obtained, pick out the target bandwidth of base station use, and based on the running time-frequency resource that the target bandwidth determination base station side obtained is distributed.Like this, just in CoMP transmission, in cooperation set, the system bandwidth possibility of each transfer point is different, achieve the unified instruction of running time-frequency resource, thus ensure that UE can carry out effective data receiver based on the running time-frequency resource obtained, system handling process under perfect CoMP transmission, improves systematic function.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and an apparatus for indicating and confirming time-frequency resources.
Background
An LTE-A (Long time evolved-Advanced) system adopts the same-frequency networking, so that the spectrum utilization rate is greatly improved, the user signals at the edge of a cell are seriously faded and are simultaneously subjected to higher interference from other cells, and the experience of edge users is seriously influenced if the problems of signal fading and interference are not processed. The CoMP (coordinated multiple points) technology not only can improve the signal quality but also can reduce the inter-cell interference by introducing information interaction and joint transmission among multiple cells, thereby greatly improving the data transmission performance of cell edge users.
The current multipoint cooperative transmission schemes can be roughly classified into 3 types: DPS (dynamic transmission point selection), CBF (coordinated beamforming) and JT (joint transmission), or a hybrid scheme of the above 3 types of transmission schemes may be adopted, for example, DPS and CBF are combined, a main transmission point is determined by dynamic selection, and cooperative beamforming is implemented between cooperative transmission points other than the non-main transmission point by joint scheduling.
With CoMP techniques, a serving point (i.e., a master transmission point) and/or one or more other transmission points in a cooperating set may participate in data transmission to a UE (user equipment). In order to ensure that the UE receives data effectively, the UE needs to be informed of the time-frequency resource for data transmission through signaling.
In the existing LTE-a system, only a service point can provide data transmission for a UE, and a DCI (downlink control signaling) is used to notify the UE of a time-frequency resource for data transmission by using one of the following three resource allocation types.
Resource allocation type 0: bandwidth of systemDivision into NRBGRBGs (resource Block group), each RBG containing P RBs (resource Block),whereinRepresenting a minimum integer not less than x, setting NRBGOne bit and NRBGThe RBG pairs are in one-to-one correspondence relationship, and the N is used forRBGBits to indicate whether each RBG is allocated for use by the UE; wherein, the value of P is related to the system bandwidth, and specifically includes:
TABLE 1
Resource allocation type 1: bandwidth of systemDivision into NRBGRBGs, each RBG containing P RBs,and N isRBGDividing each RBG into P RBG sets, adoptingBit indicates whether each RBG set is allocated to UE for use, and settingOne bit and selected RBG setOne RB is in one-to-one correspondence, by whichOne bit to indicate within the selected RBG setWhether each RB in the RBs is allocated to the UE for use; the value of P is related to the system bandwidth, and is specifically shown in table 1.
Resource allocation type 2: indicating the mapping relation of VRB to PRB by 1 bit, adoptingOne bit indicates the VRB used.
For DCI formats 1A, 1B or 1D, RIV (resource indication value) gives the starting-over resource number RB of the VRB usedstartAnd the number L of VRBs usedCRBsWherein, the definition of RIV is:
if the number of the first and second antennas is greater than the predetermined number,then, then
If not, then, wherein L isCRBsNot less than 1 and not more than
For DCI format1C, the RIV corresponds to the VRB starting resource number RBstart＝0, And the number of VRBs used Wherein,the values of (a) are related to the system bandwidth, as shown in table 2.
TABLE 2
It can be seen that the content of the resource indication and the number of bits used are both related to the system bandwidth.
In the prior art, when a CoMP technology is adopted, a serving point and/or one or more other transmission points in a cooperating set may participate in data transmission for a certain UE. Due to differences of application environments and manufacturers, system bandwidths supported by transmission points in a cooperation set during actual work may be different, and contents of resource indication are related to the system bandwidths, in this case (i.e., in CoMP transmission), it is necessary to determine which transmission point in the cooperation set is to be subjected to resource indication according to the system bandwidth.
Disclosure of Invention
The embodiment of the invention provides a method and a device for indicating and confirming time-frequency resources, which are used for realizing unified indication of the time-frequency resources in CoMP transmission.
The embodiment of the invention provides the following specific technical scheme:
a method for indicating time frequency resources comprises the following steps:
a network side notifies a terminal of system bandwidths of at least two transmission points by adopting a high-level signaling or Downlink Control Information (DCI), and selects the system bandwidth of one transmission point as a target bandwidth from the system bandwidths of the at least two transmission points;
a network side determines time-frequency resources used when data transmission is carried out on a terminal;
the network side determines the indication content and the indication mode of the time-frequency resource in the corresponding downlink signaling based on the target bandwidth;
and the network side sends the downlink signaling to the terminal, and the terminal determines the allocated time-frequency resource according to the downlink signaling.
A method for confirming time frequency resources comprises the following steps:
the terminal obtains the system bandwidth of at least two transmission points according to the notification of the network side;
a terminal receives a downlink signaling which is sent by a network side and used for indicating time frequency resources, and performs blind detection on the downlink signaling by adopting the system bandwidths of the at least two transmission points to determine a target bandwidth;
and the terminal determines the time-frequency resource allocated by the network side according to the downlink signaling based on the target bandwidth.
An apparatus for indicating time-frequency resources, comprising:
a first processing unit, configured to notify the terminal of system bandwidths of at least two transmission points by using a high-level signaling or DCI (downlink control information), and select a system bandwidth of one transmission point as a target bandwidth from the system bandwidths of the at least two transmission points;
the second processing unit is used for determining time-frequency resources used when data transmission is carried out on the terminal;
a third processing unit, configured to determine, based on the target bandwidth, indication content and an indication mode of a time-frequency resource in a corresponding downlink control information downlink signaling;
and the communication unit is used for sending the downlink signaling to the terminal and enabling the terminal to determine the allocated time-frequency resource according to the downlink signaling.
An apparatus for confirming time-frequency resources, comprising:
the first control unit is used for obtaining the system bandwidth of at least two transmission points according to the network side notification;
a communication unit, configured to receive a downlink control information downlink signaling sent by a network side and used for performing time-frequency resource indication, and notify the first control unit to perform blind detection on the downlink signaling by using the system bandwidths of the at least two transmission points, so as to determine a target bandwidth;
and the second control unit is used for determining the time-frequency resources allocated by the network side according to the downlink signaling based on the target bandwidth.
In the embodiment of the invention, a base station informs UE of system bandwidths of at least two transmission points, then selects the system bandwidth of at least one transmission point as a target bandwidth, allocates time-frequency resources to the UE according to the target bandwidth, and performs time-frequency resource indication in downlink signaling based on the target bandwidth, and after the UE receives the downlink signaling, the UE selects the target bandwidth used by the base station from the obtained system bandwidths of at least two transmission points by adopting a blind test mode, and analyzes the received downlink signaling based on the obtained target bandwidth, thereby determining the time-frequency resources allocated by the base station side. Therefore, in the CoMP transmission, under the condition that the system bandwidths of the transmission points in the cooperation set are possibly different, the unified indication of the time-frequency resources is realized, so that the UE can be ensured to perform effective data reception based on the obtained time-frequency resources, the system processing flow under the CoMP transmission is perfected, and the system performance is improved.
Drawings
FIG. 1 is a functional block diagram of a base station according to an embodiment of the present invention;
FIG. 2 is a functional block diagram of a terminal according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a time-frequency resource indication performed by a base station to a terminal in an embodiment of the present invention.
Fig. 4 is a flow chart of time-frequency resource confirmation performed by the terminal according to the base station indication in the embodiment of the present invention.
Detailed Description
In order to improve the protocol flow, the embodiment of the invention provides a method for indicating and confirming time-frequency resources in CoMP transmission.
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In an embodiment of the present invention, a transmission point is defined as a group of transmission antennas with the same geographical location, and different sectors of the same site correspond to different transmission points. In CoMP transmission, transmission points directly and/or indirectly participating in data transmission to a UE form a coordinated transmission set, wherein the transmission points transmitting PBCH (physical broadcast channel) signaling to the UE are referred to as serving points, and others may be referred to as non-serving points. Meanwhile, in order to implement CoMP transmission, the UE is also required to feed back channel state information of corresponding transmission points to the network side, and a set of the transmission points fed back with the channel state information by the UE is also called a feedback set.
In the embodiment of the present invention, when the network side indicates time-frequency resources to the UE, the DCI may be used to indicate a resource allocation situation of a PDSCH (physical downlink shared channel) to the UE, or may indicate a resource allocation situation of an enhanced physical downlink control channel (enhanced physical downlink control channel) to the UE-PDCCH through a high layer signaling.
Referring to fig. 1, in the embodiment of the present invention, the base station includes a communication unit 10, a first processing unit 11, a second processing unit 12, and a third processing unit 13, wherein,
a first processing unit 11, configured to notify the UE of system bandwidths of at least two transmission points by using a higher layer signaling or downlink control information DCI, and select a system bandwidth of one transmission point as a target bandwidth from the system bandwidths of the at least two transmission points;
a second processing unit 12, configured to determine a time-frequency resource used when performing data transmission on the UE;
a third processing unit 13, configured to determine, based on the target bandwidth, indication content and an indication mode of a time-frequency resource in corresponding DCI;
and a communication unit 10, configured to send the DCI to the UE, so that the UE determines the allocated time-frequency resource according to the DCI.
Referring to fig. 2, in the embodiment of the present invention, the UE includes a communication unit 20, a first control unit 21, and a second control unit 22, wherein,
a first control unit 21, configured to obtain system bandwidths of at least two transmission points according to the notification;
a communication unit 20, configured to receive DCI for performing time-frequency resource indication sent by a network side, and notify a first control unit 21 to perform blind detection on the DCI by using the system bandwidths of the at least two transmission points, so as to determine a target bandwidth;
and a second control unit 22, configured to determine, based on the target bandwidth, a time-frequency resource allocated by the network side according to the DCI.
Based on the above technical solution, referring to fig. 3, in the embodiment of the present invention, a detailed flow of performing time-frequency resource indication to the UE by the base station is as follows:
step 300: the base station informs the UE of the system bandwidths of at least two transmission points, and selects the system bandwidth of one transmission point as a target bandwidth from the system bandwidths of the at least two transmission points.
In this embodiment, the base station may represent any one or more transmission points in the cooperative transmission set, as long as the time-frequency resource indication can be performed to the UE. When notifying the system bandwidths of at least two transmission points to the UE, the base station notifies the system bandwidths of part or all transmission points in a coordinated transmission set corresponding to the UE; or notifying the system bandwidth of part or all transmission points in the feedback set corresponding to the UE; the base station may transmit the system bandwidths of the at least two transmission points to the UE by using a high-level signaling or DCI, and further, if the base station fails to determine whether the UE receives the system bandwidths of the at least two transmission points, in order to ensure normal operation of the system, the base station may directly determine the system bandwidth of the service point corresponding to the UE as a target bandwidth, and perform time-frequency resource indication to the UE based on the target bandwidth in a subsequent process.
On the other hand, if the UE has successfully received the system bandwidths of the at least two transmission points sent by the base station, the base station selects the system bandwidth of one transmission point as a target bandwidth from the system bandwidths of the at least two transmission points, specifically: the base station may determine a system bandwidth of one transmission point directly transmitting data to the UE as the target bandwidth.
Step 310: and the base station determines time-frequency resources used by the UE for data transmission.
Specifically, the base station may determine, according to the channel state information reported by the UE, the service condition and the network load of the UE, a data transmission scheme used for the UE (i.e., which transmission points in the coordinated transmission set transmit data to the UE), and a time-frequency resource used in the data transmission scheme, which is also referred to as a PDSCH (physical downlink shared channel) resource.
Step 320: and the base station determines the indication content and the indication mode of the time-frequency resource in the DCI based on the target bandwidth.
In this embodiment, the indication content and the indication mode (e.g., bit length) of the time-frequency resource in CoMP transmission adopted in a certain DCI format do not affect the use of other DCI formats (e.g., bit lengths); for example, it is agreed that the DCIformat2C format is adopted to support CoMP transmission, and when the DCIformat2C format is adopted to indicate time frequency resources, the method is adopted to determine the target bandwidth and the indication content and indication mode of the corresponding time frequency resources, and the adopted bit length does not affect the bit length adopted in the DCIformat1A, DCIformat1B and other formats. Wherein, the bit length of other DCI formats may still be determined by the system bandwidth of the UE corresponding to the service point.
On the other hand, in this embodiment, when the base station determines the indication content and the indication mode of the time-frequency resource in the corresponding DCI according to the target bandwidth, the following three implementation modes may be adopted, but are not limited to:
the first mode is as follows: the base station determines each RBG divided in the system according to the target bandwidth and the bit length used for bearing time-frequency resource allocation information in the DCI, and indicates whether each RBG is allowed to be used by the UE or not to the UE through the bit of the corresponding length in the DCI based on the RBG contained in the time-frequency resource allocated to the UE.
For example, the base station indicates the allocation condition of the time-frequency resource by using the resource allocation type 0, which is specifically as follows:
base station allocates resource and indicates target bandwidth used in resourceDivision into NRBGRBGs, each RBG containing P Resource Blocks (RBs),wherein,represents the minimum integer not less than x, and the value of P is related to the target bandwidth, as shown in table 3:
TABLE 3
The base station adopts N in DCIRBGOne bit indicates whether each RBG is allocated to UE for use, NRBGOne bit and NRBGThe RBGs are in a one-to-one correspondence relationship, that is, the value of each bit indicates whether the corresponding RBG is allocated to the UE, for example, "1" indicates allocation, and "0" indicates no allocation.
The second way is: the base station determines each RBG and each RBG set divided in the system according to the target bandwidth, and the bit length used for bearing time-frequency resource allocation information in the DCI, and indicates whether each RBG set allows the UE to use or not and whether each RB in the RBG set allowed to use or not to allow the UE to use or not to use according to the RB corresponding to the RBG contained in the time-frequency resource allocated to the UE in the DCI through the bit with the corresponding length.
For example, the base station indicates the allocation condition of the time-frequency resource by using the resource allocation type 1, which is specifically as follows:
the base station uses the target bandwidth in resource allocation and resource indicationDivision into NRBGRBGs, each RBG containing P RBs,will NRBGEach RBG is divided into P RBG sets, where the value of P is related to the target bandwidth, as shown in table 3.
Base station adoption in DCIOne bit indicates whether each RBG set is allowed to be used by the UE, andthe one bit indicates whether each RB in the RBG set allowed to be used by the UE is allowed to be used by the UE, whichBit and RBG set allowed to be used by UEEach RB is in a one-to-one correspondence, that is, the value of each bit indicates whether the corresponding RB is allocated to the UE, for example, "1" indicates allocation, and "0" indicates no allocation.
The third mode is as follows: the base station indicates the mapping relation from VRB to PBR in DCI, determines the bit length for bearing time-frequency resource allocation information in the DCI according to the target bandwidth, and indicates the starting resource number and the VRB number of VRB to UE through the bit of corresponding length in the DCI based on the target bandwidth and the position of the time-frequency resource allocated to the UE.
For example, the base station indicates the allocation condition of the time-frequency resource by using the resource allocation type 2, which is specifically as follows:
the base station indicates the mapping relation of VRB to PRB through 1 bit in DCI and adopts the sameThe number of bits indicates the starting resource number and the number of VRBs allowed to be used by the UE, wherein,in order to achieve the target bandwidth,
if DCIformat1A, DCIformat1B or DCIformat1D are used to support CoMP transmission, for DCIformat1A, DCIformat1B or DCIformat1D, the base station may be configured as described aboveIn one bit, the starting resource number RB of the VRB allowed for the UE is indicated by RIVstartAnd the number LCRBsWherein, the definition of RIV is:
if the number of the first and second antennas is greater than the predetermined number,then
If not, then, wherein L isCRBsNot less than 1 and not more than
If DCIformat1C is used to support CoMP transmission, for DCIformat1C, the BS can be configured as described aboveIn one bit, the start of the VRB allowed for the UE is indicated by RIVStarting resource number RBstartAnd the number LCRBsWherein RIV
Corresponding VRB starting resource number RBstart＝0, And the number of VRBs to which RIV corresponds Wherein,the value of which is related to the target bandwidth, as shown in table 4:
TABLE 4
In the following embodiments, the RIV is confirmed in the above manner, and will not be described again.
Step 330: and the base station sends the DCI to the UE, and the UE determines the allocated time-frequency resource according to the received DCI.
Based on the foregoing embodiments, referring to fig. 4, correspondingly, in the embodiments of the present invention, a detailed flow for the UE to perform time-frequency resource confirmation according to the indication of the base station is as follows:
step 400: and the UE acquires the system bandwidths of at least two transmission points according to the notification of the base station.
Specifically, the system bandwidths of the at least two transmission points, which are obtained by the UE according to the notification of the base station, may be the system bandwidths of some or all transmission points in the cooperative transmission set corresponding to the UE; or, the system bandwidth of some or all transmission points in the feedback set corresponding to the UE may also be used; the UE may obtain the system bandwidths of the at least two transmission points through a high layer signaling or a DCI notification sent by the base station; further, if the UE fails to receive the system bandwidths of the at least two transmission points notified by the base station, in order to ensure normal operation of the system, the UE may directly determine the system bandwidth of the service point corresponding to the UE as a target bandwidth, and determine the allocation condition of the time-frequency resource based on the target bandwidth in a subsequent process.
Step 410: and the UE receives DCI (downlink control information) which is sent by the base station and used for indicating time-frequency resources, and performs blind detection on the received DCI by adopting the system bandwidths of the at least two transmission points so as to determine a target bandwidth.
The method specifically comprises the following steps: the UE reads the system bandwidth of any transmission point from the obtained system bandwidths of at least two transmission points, determines the bit length for bearing the time-frequency resource allocation information in the DCI based on the system bandwidth, then judges whether the obtained bit length can be used for obtaining the time-frequency resource allocation information in the received DCI, and if so, determines the system bandwidth of any transmission point as a target bandwidth; otherwise, reading the system bandwidth of the next transmission point, repeating the above operation, and continuing to judge until the target bandwidth is obtained.
For example, the base station notifies the UE of the system bandwidths of the three transmission points, which are respectively referred to as a system bandwidth a, a system bandwidth b, and a system bandwidth c, the UE assumes that the system bandwidth a is a target bandwidth, calculates a bit length a for carrying time-frequency resource allocation information in the DCI according to the system bandwidth a, and reads the time-frequency resource allocation information from the DCI according to the bit length a, and if the reading fails, the UE determines that the system bandwidth a is not the target bandwidth; and then, the UE continuously assumes that the system bandwidth b is the target bandwidth, calculates the bit length b used for bearing the time-frequency resource allocation information in the DCI according to the system bandwidth b, and reads the time-frequency resource allocation information from the DCI according to the bit length b, and if the reading is successful, the UE determines that the system bandwidth b is the target bandwidth without reading the system bandwidth c.
Step 420: and the UE determines the time-frequency resources allocated by the network side according to the received DCI based on the target bandwidth.
In the embodiment of the present invention, corresponding to step 320, when performing step 420, the UE may adopt, but is not limited to, the following three implementation manners:
the first mode is as follows: and the UE determines each RBG divided in the system according to the target bandwidth and the bit length used for bearing the time-frequency resource allocation information in the DCI, and determines whether each RBG is allowed to be used or not through the bits with the corresponding length.
For example: the UE determines the allocation of the time-frequency resource according to the resource allocation type 0, which specifically includes:
UE target bandwidthDivision into NRBGRBGs, each RBG containing P RBs,wherein,represents the minimum integer not less than x, and the value of P is related to the target bandwidth, as shown in table 3.
UE in received DCIBy NRBGOne bit determines whether each RBG can be used, NRBGOne bit and NRBGThe RBGs are in a one-to-one correspondence relationship, that is, the value of each bit indicates whether the corresponding RBG is allocated to the UE, for example, "1" indicates allocation, and "0" indicates no allocation. On the other hand, NRBGThe reading position of the bit in the DCI may be indicated by the base station to the UE, or agreed by the base station and the UE, or executed according to a protocol, which is not described herein again.
The second way is: and the UE determines each RGB and each RBG set divided in the system and the bit length for carrying time-frequency resource allocation information in the DCI according to the target bandwidth, and respectively determines whether each RBG set is allowed to be used or not and whether each RB in the RGB set allowed to be used is allowed to be used or not through the bits with corresponding length.
For example, the UE determines the allocation of the time-frequency resource according to the resource allocation type 1, which is specifically as follows:
UE target bandwidthDivision into NRBGRBGs, each RBG containing P RBs,will NRBGEach RBG is divided into P RBG sets, where the value of P is related to the target bandwidth, as shown in table 3.
UE passing in DCIBit to determine whether each RBG set is allowed to be used, and throughOne bit determines whether each RB in the RBG set allowed to be used is allowed to be used, whichBit and RBG set allowed to be used by UEEach RB is in a one-to-one correspondence, that is, the value of each bit indicates whether the corresponding RB is allocated to the UE, for example, "1" indicates allocation, and "0" indicates no allocation. On the other hand, in the case of a liquid,a bit sumThe reading position of the bit in the DCI may be indicated by the base station to the UE, or agreed by the base station and the UE, or executed according to a protocol, which is not described herein again.
The third mode is as follows: and the UE determines the mapping relation from the VRB to the PBR according to the received DCI, determines the bit length for bearing time-frequency resource allocation information in the DCI according to the target bandwidth, and determines the starting resource number and the VRB number of the VRB through the bits with corresponding length.
For example, the UE determines the allocation of the time-frequency resource according to the resource allocation type 2, which is specifically as follows:
the UE determines the mapping relation from the VRB to the PRB according to the 1-bit indication information carried by the DCI, and the mapping relation is passed through in the DCIThe number of bits determines the starting resource number and number of VRBs allowed to be used, wherein,in order to achieve the target bandwidth,
for DCIformat1A, DCIformat1B, DCIformat1D and DCIformat1C, the UE can all pass the aboveRIV determination carried by a single bit for use by a UEStarting resource number RB of VRBstartAnd the number LCRBsWherein, the definition of RIV is the same as that of the base station side, and is not described herein again.
In summary, in the embodiment of the present invention, a base station notifies a UE of system bandwidths of at least two transmission points by using a high-level signaling or downlink control information DCI, selects the system bandwidth of at least one transmission point as a target bandwidth, allocates a time-frequency resource to the UE according to the target bandwidth, and performs time-frequency resource indication in a downlink signaling based on the target bandwidth, and after receiving the downlink signaling, the UE selects a target bandwidth used by the base station from the obtained system bandwidths of the at least two transmission points by using a blind detection method, and analyzes the received downlink signaling based on the obtained target bandwidth, thereby determining the time-frequency resource allocated by the base station. Therefore, in the CoMP transmission, under the condition that the system bandwidths of the transmission points in the cooperation set are possibly different, the unified indication of the time-frequency resources is realized, so that the UE can be ensured to perform effective data reception based on the obtained time-frequency resources, the system processing flow under the CoMP transmission is perfected, and the system performance is improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (22)
1. A method for indicating time-frequency resources is characterized by comprising the following steps:
a network side notifies a terminal of system bandwidths of at least two transmission points by adopting a high-level signaling or Downlink Control Information (DCI), and selects the system bandwidth of one transmission point as a target bandwidth from the system bandwidths of the at least two transmission points;
a network side determines time-frequency resources used when data transmission is carried out on a terminal;
the network side determines the indication content and the indication mode of the time-frequency resource in the corresponding downlink signaling based on the target bandwidth;
and the network side sends the downlink signaling to the terminal, and the terminal determines the allocated time-frequency resource according to the downlink signaling.
2. The method of claim 1, wherein the network side informing the terminal of the system bandwidths of the at least two transmission points comprises:
the network side informs the terminal of the system bandwidth of part or all transmission points in the cooperative transmission set corresponding to the terminal; or notifying the system bandwidth of part or all transmission points in the feedback set corresponding to the terminal.
3. The method of claim 1, wherein after a network side notifies a terminal of system bandwidths of at least two transmission points by using higher layer signaling or DCI, if it is not determined whether the terminal receives the system bandwidths of the at least two transmission points, the system bandwidth of a service point in a coordinated transmission set corresponding to the terminal is determined as a target bandwidth.
4. The method of claim 1, wherein the network side selects the system bandwidth of at least one transmission point as the target bandwidth from the system bandwidths of the at least two transmission points, and comprises:
and the network side determines the system bandwidth of one transmission point which directly transmits data to the terminal as the target bandwidth from the system bandwidths of the at least two transmission points.
5. The method according to any of claims 1-4, wherein when the network side determines the indication content and the indication mode of the time-frequency resource in the downlink signaling based on the target bandwidth, the method comprises:
the network side determines each resource block group RBG divided in the system according to the target bandwidth, and the bit length used for bearing time-frequency resource allocation information in the downlink signaling, and indicates whether each RBG is allowed to be used by the terminal or not to the terminal through the bit with the corresponding length in the downlink signaling based on the RBG contained in the time-frequency resource allocated to the terminal;
or
The network side determines each RBG and each RBG set divided in the system according to the target bandwidth, and the bit length used for bearing time-frequency resource allocation information in the downlink signaling, and indicates whether each RBG set allows the terminal to use and whether each RB in the RBG set allowed to use allows the terminal to use through the bits with corresponding length in the downlink signaling based on the resource block RB corresponding to the RBG contained in the time-frequency resource allocated to the terminal;
or
And the network side indicates the mapping relation from the virtual resource block VRB to the physical resource block PBR in the downlink signaling, determines the bit length for bearing time-frequency resource allocation information in the downlink signaling according to the target bandwidth, and indicates the initial resource number and the VRB number of the VRB to the terminal through the bit with the corresponding length in the downlink signaling based on the target bandwidth and the position of the time-frequency resource allocated to the terminal.
6. A method for confirming time frequency resources is characterized by comprising the following steps:
the terminal obtains the system bandwidth of at least two transmission points according to the notification of the network side;
a terminal receives a downlink signaling which is sent by a network side and used for indicating time frequency resources, and performs blind detection on the downlink signaling by adopting the system bandwidths of the at least two transmission points to determine a target bandwidth;
and the terminal determines the time-frequency resource allocated by the network side according to the downlink signaling based on the target bandwidth.
7. The method of claim 6, wherein the terminal obtains the system bandwidths of at least two transmission points according to the network side notification, comprising:
the terminal obtains the system bandwidth of part or all transmission points in the cooperative transmission set corresponding to the terminal according to the notification of the network side; or, the system bandwidth of part or all transmission points in the feedback set corresponding to the terminal is obtained.
8. The method of claim 7, wherein the terminal obtains the system bandwidths of the at least two transmission points according to a higher layer signaling or a notification of downlink control information DCI sent by a network side.
9. The method of claim 8, wherein if the terminal fails to receive a higher layer signaling or DCI sent by the network side, determining a system bandwidth of a service point in a coordinated transmission set corresponding to the terminal as a target bandwidth.
10. The method of claim 6, wherein the terminal performs blind detection on the downlink signaling by using the system bandwidths of the at least two transmission points to determine a target bandwidth, comprising:
the terminal reads the system bandwidth of any transmission point from the system bandwidths of the at least two transmission points, and determines the bit length used for bearing the time-frequency resource allocation information in the downlink signaling based on the system bandwidth;
the terminal judges whether the bit length can be adopted to obtain time frequency resource allocation information in the downlink signaling or not, and if so, determines the system bandwidth of any transmission point as a target bandwidth; otherwise, reading the system bandwidth of the next transmission point and continuing to judge until the target bandwidth is obtained.
11. The method according to any of claims 6-10, wherein the terminal determines the time-frequency resources allocated by the network side according to the downlink signaling based on the target bandwidth, including:
the terminal determines each resource block group RBG divided in the system according to the target bandwidth, and the bit length used for bearing time-frequency resource allocation information in the downlink signaling, and determines whether each RBG is allowed to be used or not through the bit of the corresponding length;
or,
the terminal determines each RGB and each RBG set divided in the system according to the standard bandwidth, and the bit length used for bearing time-frequency resource allocation information in the downlink signaling, and determines whether each RBG set is allowed to be used or not and whether each RB in the RBG set allowed to be used is allowed to be used or not according to the bits with corresponding length;
or,
and the terminal determines the mapping relation from the VRB to the PBR according to the downlink signaling, determines the bit length for bearing time-frequency resource allocation information in the downlink signaling according to the target bandwidth, and determines the initial resource number and the VRB number of the VRB through the bit with the corresponding length.
12. An apparatus for indicating time-frequency resources, comprising:
a first processing unit, configured to notify the terminal of system bandwidths of at least two transmission points by using a high-level signaling or DCI (downlink control information), and select a system bandwidth of one transmission point as a target bandwidth from the system bandwidths of the at least two transmission points;
the second processing unit is used for determining time-frequency resources used when data transmission is carried out on the terminal;
a third processing unit, configured to determine, based on the target bandwidth, indication content and an indication mode of a time-frequency resource in a corresponding downlink signaling;
and the communication unit is used for sending the downlink signaling to the terminal and enabling the terminal to determine the allocated time-frequency resource according to the downlink signaling.
13. The apparatus of claim 12, wherein the first processing unit notifies the terminal of the system bandwidths of the at least two transmission points, comprising:
the first processing unit informs the terminal of the system bandwidth of part or all transmission points in the cooperative transmission set corresponding to the terminal; or notifying the system bandwidth of part or all transmission points in the feedback set corresponding to the terminal.
14. The apparatus of claim 12, wherein after notifying the system bandwidths of at least two transmission points to the terminal by using higher layer signaling or DCI, if it is not determined whether the terminal receives the system bandwidths of the at least two transmission points, the first processing unit determines the system bandwidth of the service point in the coordinated transmission set corresponding to the terminal as the target bandwidth.
15. The apparatus of claim 12, wherein the first processing unit selects a system bandwidth of at least one transmission point as a target bandwidth from the system bandwidths of the at least two transmission points, comprising:
and the first processing unit determines the system bandwidth of one transmission point which directly transmits data to the terminal as a target bandwidth in the system bandwidths of the at least two transmission points.
16. The apparatus according to any of claims 12-15, wherein the determining, by the third processing unit, the content and the manner of indicating the time-frequency resource in the downlink signaling based on the target bandwidth includes:
the third processing unit determines, based on the target bandwidth and according to the target bandwidth, each resource block group RBG divided in the system, and a bit length used for carrying time-frequency resource allocation information in the downlink signaling, and indicates, based on the RBGs included in the time-frequency resource allocated to the terminal, whether each RBG is allowed to be used by the terminal to the terminal through bits of corresponding length in the downlink signaling;
or
The third processing unit determines, based on the target bandwidth, each RBG and each RBG set divided in the system according to the target bandwidth, and a bit length used for carrying time-frequency resource allocation information in the downlink signaling, and indicates, based on a resource block RB corresponding to an RBG included in a time-frequency resource allocated to a terminal, whether each RBG set is allowed to be used by the terminal and whether each RB in the allowed RBG set is allowed to be used by the terminal, respectively, through bits of corresponding lengths in the downlink signaling;
or
The third processing unit indicates the mapping relation from the virtual resource block VRB to the physical resource block PBR in the downlink signaling based on the target bandwidth, determines the bit length used for bearing time-frequency resource allocation information in the downlink signaling according to the target bandwidth, and indicates the starting resource number and the VRB number of the VRB to the terminal through the bits with corresponding lengths in the downlink signaling based on the target bandwidth and the position of the time-frequency resource allocated to the terminal.
17. An apparatus for determining time-frequency resources, comprising:
the first control unit is used for obtaining the system bandwidth of at least two transmission points according to the network side notification;
a communication unit, configured to receive a downlink signaling sent by a network side and used for performing time-frequency resource indication, and notify the first control unit to perform blind detection on the downlink signaling by using the system bandwidths of the at least two transmission points, so as to determine a target bandwidth;
and the second control unit is used for determining the time-frequency resources allocated by the network side according to the downlink signaling based on the target bandwidth.
18. The apparatus of claim 17, wherein the first control unit obtains system bandwidths of at least two transmission points according to a network side notification, comprising:
the first control unit obtains the system bandwidth of part or all transmission points in the cooperative transmission set corresponding to the device according to the notification of the network side; or, the system bandwidth of part or all transmission points in the feedback set corresponding to the device is obtained.
19. The apparatus of claim 18, wherein the first control unit obtains the system bandwidths of the at least two transmission points according to a higher layer signaling or a notification of downlink control information DCI sent by a network side.
20. The apparatus of claim 19, wherein if the first control unit fails to receive a higher layer signaling or DCI transmitted by a network side, the first control unit determines a system bandwidth of a service point in a coordinated transmission set corresponding to the apparatus as a target bandwidth.
21. The apparatus of claim 17, wherein the first control unit performs blind detection on the downlink signaling by using system bandwidths of the at least two transmission points to determine a target bandwidth, comprising:
the first control unit reads the system bandwidth of any one transmission point from the system bandwidths of the at least two transmission points, and determines the bit length for bearing the time-frequency resource allocation information in the downlink signaling based on the system bandwidth;
the first control unit judges whether the bit length can be used for acquiring time-frequency resource allocation information in the downlink signaling, and if so, determines the system bandwidth of any transmission point as a target bandwidth; otherwise, reading the system bandwidth of the next transmission point and continuing to judge until the target bandwidth is obtained.
22. The apparatus of any one of claims 17 to 21, wherein the determining, by the second control unit, the time-frequency resource allocated by the network side according to the downlink signaling based on the target bandwidth comprises:
the second control unit determines each RBG divided in the system according to the target bandwidth and the bit length used for bearing time-frequency resource allocation information in the downlink signaling, and determines whether each RBG is allowed to be used or not through the bits with the corresponding length;
or,
the second control unit determines each RBG and each RBG set divided in the system according to the standard bandwidth, and the bit length used for bearing time-frequency resource allocation information in downlink signaling, and determines whether each RBG set is allowed to be used by the terminal or not and whether each RB in the RBG set allowed to be used is allowed to be used or not according to the bit of the corresponding length;
or,
and the second control unit determines the mapping relation from the VRB to the PBR according to the downlink signaling, determines the bit length for bearing time-frequency resource allocation information in the downlink signaling according to the target bandwidth, and determines the starting resource number and the VRB number of the VRB through the bits with corresponding length.
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| KR102197441B1 (en) * | 2015-12-31 | 2020-12-31 | 후아웨이 테크놀러지 컴퍼니 리미티드 | Method for transmitting downlink feedback information, base station and terminal equipment |
| CN107302796B (en) | 2016-03-31 | 2023-04-18 | 华为技术有限公司 | Data transmission method, network side equipment and terminal equipment |
| CN114828252A (en) * | 2016-04-08 | 2022-07-29 | 华为技术有限公司 | Method and device for multi-transmission point data transmission |
| CN107306177B (en) | 2016-04-22 | 2023-11-10 | 华为技术有限公司 | Method for transmitting data, user equipment and network equipment |
| CN114189321B (en) | 2016-11-14 | 2023-09-19 | 瑞典爱立信有限公司 | Methods for wireless devices and network nodes, such wireless devices and network nodes, and computer programs thereof |
| CN108513356B (en) * | 2017-02-27 | 2020-01-07 | 维沃软件技术有限公司 | A resource allocation indication method, base station and terminal |
| CN107154835B (en) * | 2017-05-05 | 2020-05-19 | 宇龙计算机通信科技(深圳)有限公司 | Data sending method and device |
| CN111107643B (en) * | 2017-06-16 | 2021-04-09 | 华为技术有限公司 | Bandwidth resource allocation method, device and system |
| CN109391417B (en) | 2017-08-11 | 2022-05-13 | 华为技术有限公司 | Method, device and system for transmitting downlink control information |
| WO2019095225A1 (en) * | 2017-11-16 | 2019-05-23 | Oppo广东移动通信有限公司 | Resource indication method, user equipment, network device and computer storage medium |
| WO2020077644A1 (en) | 2018-10-19 | 2020-04-23 | 北京小米移动软件有限公司 | Resource switching method, and resource allocation method, apparatus, device and system |
| US12074752B2 (en) | 2019-05-17 | 2024-08-27 | Samsung Electronics Co., Ltd. | Method and apparatus for transmitting and receiving data in a wireless communication system |
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