CN108632869B

CN108632869B - Transmission control method and device

Info

Publication number: CN108632869B
Application number: CN201710174295.8A
Authority: CN
Inventors: 刘壮; 高音; 黄河; 刘旸
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2017-03-22
Filing date: 2017-03-22
Publication date: 2023-02-17
Anticipated expiration: 2037-03-22
Also published as: CN108632869A; WO2018171508A1

Abstract

The invention discloses a transmission control method and a transmission control device. The transmission control method comprises the following steps: the centralized processing unit sends the measurement control information of the downlink data transmission quality to the distributed processing unit; and receiving a measurement report or an abnormal transmission quality indication reported by the distributed processing unit. According to the scheme provided by the embodiment of the invention, the centralized processing unit can timely acquire the transmission quality in the distributed processing unit, and further measures can be taken to improve the data transmission quality.

Description

Transmission control method and device

Technical Field

The present invention relates to wireless communication technologies, and in particular, to a transmission control method and apparatus.

Background

Fifth generation (5) ^th Generation, abbreviated as 5G) network architecture has innovativeness and flexibility in networking, and a baseband processing Unit (BBU) on a radio access network side in a 5G network is separated into two functional entities, namely a Centralized processing Unit (CU) and a Distributed processing Unit (DU). By controlling the plurality of DUs by the centralized CU, the baseband centralized processing of the cloud architecture and the remote distributed provision of services for users can be realized. In the network architecture with separated CU-DU, the network function with insensitive time delay is placed in CU, the network function with sensitive time delay is placed in DU, and the CU and DU are transmitted and connected by ideal/non-ideal forward transmission (frontaul), so that the function of multi-point cooperation is realized, and the flexible networking of separated or integrated sites can be supported.

As shown in fig. 1, among the CU-DU separation schemes, there are two schemes, scheme 2 (OPTION 2) and scheme 3 (OPTION 3). In OPTION2, a Packet Data Convergence Protocol (PDCP) layer is located in the CU, a Radio Link Control (RLC) layer and a layer below the RLC layer are located in the DU, and a PDCP PDU (Protocol Data Unit) Data Packet is used for Data plane transmission between the CU and the DU. In OPTION3, the non-delay-sensitive function of the RLC includes functions such as Automatic Repeat Request (ARQ) and the like in the CU, another part of the RLC includes functions such as real-time segmentation and the like which are sensitive to delay in the DU, and RLC PDUs are used for data plane transmission between the CU and the DU. In both OPTION2 and OPTION3, in downlink data transmission, a CU needs to send downlink data (PDCP PDU in OPTION2 and RLC PDU in OPTION 3) delivered to a User Equipment (UE) to a DU, and send the actual DU to the UE. Because the actual transmission capability of the DU is affected by various factors such as air interface resource scheduling and channel quality, a flow control interface of a user plane exists between the CU and the DU, and the DU needs to apply for data from the CU for transmission within a period of time. However, since the CU and the DU are separated, during the data transmission process of the DU, the CU cannot accurately determine the transmission condition of the DU to the buffered data. It is likely that a problem occurs in DU data transmission, and a CU cannot know in time, which results in an increase in data delay and even packet loss. If the link detection of the physical layer is only relied on to monitor whether the transmission link on the DU fails, the DU may have a continuous transmission error of the data packet and an increase in the delay before the physical layer reports the link failure.

Therefore, under the existing CU-DU separation architecture, a CU cannot timely know the transmission condition of downlink buffer data in a DU, and thus the problems of increased data delay and even packet loss occur.

Disclosure of Invention

The invention provides a transmission control method and a transmission control device, which enable a CU to timely acquire the transmission quality of downlink cache data in a DU (data Unit) so as to take corresponding measures and reduce the data transmission delay and the packet loss rate.

In order to achieve the object of the present invention, an embodiment of the present invention provides a transmission control method, including:

the centralized processing unit sends the measurement control information of the downlink data transmission quality to the distributed processing unit;

and receiving a measurement report or a transmission quality abnormal indication reported by the distributed processing unit.

In an optional embodiment of the present invention, the measurement control information includes at least one of:

measurement control information for transmission quality of all service data of the distributed processing unit;

measurement control information for transmission quality of traffic data for one or more user equipments carried on the distributed processing unit.

In an optional embodiment of the present invention, the sending, by the centralized processing unit to the distributed processing unit, the measurement control information of the downlink data transmission quality includes:

the centralized processing unit sends the measurement control information to the distributed processing unit in the cell establishment process;

or, the centralized processing unit sends the measurement control information to the distributed processing unit in a cell modification process;

or, the centralized processing unit sends the measurement control information to the distributed processing unit in the process of establishing service connection between the distributed processing unit and the user equipment;

or, the centralized processing unit sends the measurement control information to the distributed processing unit in a process that the distributed processing unit and the user equipment modify the service bearer.

In an optional embodiment of the invention, the measurement control information comprises a measurement instructing the distributed processing unit to perform at least one of:

the average time delay of downlink cache data in the distributed processing unit, whether the protocol data unit data cached in the distributed processing unit exceeds the maximum time delay configured in the measurement control information, the average retransmission times of a wireless link layer control protocol, whether the retransmission times of a certain wireless link layer control protocol data unit exceeds the maximum retransmission times configured in the measurement control information, the average retransmission times of a hybrid automatic retransmission request, and whether the retransmission times of a certain hybrid automatic retransmission request data packet exceeds the maximum retransmission times configured in the measurement control information.

In an optional embodiment of the present invention, the method further comprises: after the centralized processing unit judges that the distributed processing unit is abnormal in transmission or receives the transmission quality abnormal indication according to the measurement report, if the distributed processing unit is currently in single connection, the centralized processing unit reports the transmission abnormality to a high layer, and executes subsequent processing according to the indication of the high layer.

In an optional embodiment of the present invention, the performing subsequent processing according to the indication of the higher layer includes:

when the centralized processing unit reports that the transmission of the distributed processing unit is abnormal to the high level and the high level judges that the distributed processing unit needs to be released, the centralized processing unit initiates a process of deleting the distributed processing unit to the distributed processing unit;

when the centralized processing unit reports that the service transmission quality of the user equipment is abnormal to the high layer, the service of the user equipment is migrated to other distributed processing units according to the indication of the high layer, or the service of the user equipment is released.

In an optional embodiment of the present invention, the method further comprises: after the centralized processing unit judges that the distributed processing unit is abnormal in transmission or receives an abnormal transmission quality indication according to the measurement report, if the distributed processing unit is currently in multi-connection, the centralized processing unit schedules abnormal service data on the distributed processing unit to another distributed processing unit for transmission.

In an optional embodiment of the present invention, the scheduling, by the centralized processing unit, the abnormal traffic data on the distributed processing unit to another distributed processing unit for transmission includes:

the centralized processing unit sends a protocol data unit state polling packet to user equipment and requires the user equipment to report the receiving condition of a downlink data packet;

after receiving the protocol data unit status report reported by the user equipment, the centralized processing unit determines unsuccessfully transmitted service data according to the protocol data unit status report;

and the centralized processing unit schedules the unsuccessfully transmitted service data to another distributed processing unit for transmission.

An embodiment of the present invention provides a transmission control apparatus, including:

a measurement control configuration module configured to send measurement control information of downlink data transmission quality to the distributed processing unit;

and the measurement report processing module is configured to receive the measurement report or the transmission quality abnormal indication reported by the distributed processing unit.

In an optional embodiment of the present invention, the sending, by the measurement control configuration module, the measurement control information of the downlink data transmission quality to the distributed processing unit includes:

the measurement control configuration module sends the measurement control information to the distributed processing unit in the cell establishing process;

or, the measurement control configuration module sends the measurement control information to the distributed processing unit in a cell modification process;

or, the measurement control configuration module sends the measurement control information to the distributed processing unit in the process of establishing service connection between the distributed processing unit and the user equipment;

or, the measurement control configuration module sends the measurement control information to the distributed processing unit in a process that the distributed processing unit and the user equipment modify a service bearer.

In an optional embodiment of the present invention, the measurement report processing module is further configured to, after determining that the distributed processing unit is abnormal in transmission or receives the indication of abnormal transmission quality according to the measurement report, if the distributed processing unit is currently in single connection, report the abnormal transmission to a higher layer, and execute subsequent processing according to the indication of the higher layer.

In an optional embodiment of the present invention, the performing, by the measurement report processing module according to the indication of the higher layer, subsequent processing includes:

when the transmission abnormality of the distributed processing unit is reported to the high layer and the high layer judges that the distributed processing unit needs to be released, initiating a process of deleting the distributed processing unit to the distributed processing unit;

and when the service transmission quality of the user equipment reported to the high layer is abnormal, migrating the service of the user equipment to other distributed processing units according to the indication of the high layer, or releasing the service of the user equipment.

In an optional embodiment of the present invention, the measurement report processing module is further configured to, after determining that the transmission of the distributed processing unit is abnormal or after receiving an indication of abnormal transmission quality according to the measurement report, schedule the abnormal service data on the distributed processing unit to another distributed processing unit for transmission if the current connection is multi-connection.

In an optional embodiment of the present invention, the scheduling, by the measurement report processing module, the abnormal traffic data on the distributed processing unit to another distributed processing unit for transmission includes:

sending a protocol data unit state polling packet to user equipment, and requesting the user equipment to report the receiving condition of a downlink data packet; receiving a protocol data unit status report reported by the user equipment, and determining unsuccessfully transmitted service data according to the protocol data unit status report; and scheduling the unsuccessfully transmitted service data to another distributed processing unit for transmission.

An embodiment of the present invention provides a transmission control apparatus, including a memory and a processor, where the memory stores a program, and the program, when read and executed by the processor, performs the following operations:

sending measurement control information of downlink data transmission quality to a distributed processing unit;

and receiving a measurement report or an abnormal transmission quality indication reported by the distributed processing unit.

In an optional embodiment of the present invention, the sending the measurement control information of the downlink data transmission quality to the distributed processing unit includes:

sending the measurement control information to the distributed processing unit in a cell establishing process;

or, sending the measurement control information to the distributed processing unit in a cell modification process;

or, in the process of establishing service connection between the distributed processing unit and the user equipment, sending the measurement control information to the distributed processing unit;

or, in the process that the distributed processing unit and the user equipment modify the service bearer, sending the measurement control information to the distributed processing unit.

In an optional embodiment of the invention, the program, when read and executed by the processor, further performs the following: and after judging that the transmission of the distributed processing unit is abnormal or receiving the transmission quality abnormal indication according to the measurement report, if the transmission is currently the single connection, reporting the transmission abnormality to a high layer, and executing subsequent processing according to the indication of the high layer.

In an optional embodiment of the present invention, the performing the subsequent processing according to the indication of the higher layer includes:

In an optional embodiment of the invention, the program, when read and executed by the processor, further performs the following: and after judging that the distributed processing units are abnormal in transmission or receiving an abnormal transmission quality indication according to the measurement report, if the distributed processing units are in multi-connection currently, scheduling the abnormal service data on the distributed processing units to another distributed processing unit for transmission.

In an optional embodiment of the present invention, the scheduling the abnormal traffic data on the distributed processing unit to another distributed processing unit for transmission includes:

An embodiment of the present invention provides a transmission control method, including:

the distributed processing unit receives the measurement control information of the transmission quality of the downlink data sent by the centralized processing unit;

and the distributed processing unit carries out measurement according to the measurement control information and reports a measurement report or an abnormal transmission quality indication to the centralized processing unit.

In an optional embodiment of the present invention, the performing, by the distributed processing unit, the measurement according to the measurement control information at least includes one of:

monitoring the transmission quality of all service data of the distributed processing unit;

and monitoring the transmission quality of the service data of one or more user equipment carried by the distributed processing unit.

In an optional embodiment of the present invention, the reporting of the measurement report or the transmission quality abnormal indication to the centralized processing unit includes at least one of:

periodically reporting a measurement report or an abnormal transmission quality indication to the centralized processing unit;

and reporting a measurement report or an abnormal transmission quality indication to the centralized processing unit in an event manner.

In an optional embodiment of the invention, the measurement comprises at least one of:

the average time delay of downlink cache data in the distributed processing unit, whether the data of the protocol data unit cached in the distributed processing unit exceeds the maximum time delay configured in the measurement control information, the average retransmission times of a wireless link layer control protocol, whether the retransmission times of a certain wireless link layer control protocol data unit exceeds the maximum retransmission times configured in the measurement control information, the average retransmission times of a hybrid automatic retransmission request, and whether the retransmission times of a certain hybrid automatic retransmission request data packet exceeds the maximum retransmission times configured in the measurement control information.

the measurement configuration module is arranged to receive the measurement control information of the downlink data transmission quality sent by the centralized processing unit;

a measurement module configured to perform measurement according to the measurement control information and generate a measurement report or an indication of abnormal transmission quality;

a reporting module configured to report the measurement report or the transmission quality abnormal indication to the centralized processing unit.

In an optional embodiment of the invention, the measuring comprises measuring at least one of:

and monitoring the transmission quality of the service data of one or more user equipments carried by the distributed processing unit.

In an optional embodiment of the present invention, the reporting module reports the measurement report or the transmission quality abnormal indication to the centralized processing unit, where the reporting module at least includes one of:

reporting a measurement report or an abnormal transmission quality indication to the centralized processing unit periodically;

the average time delay of downlink cache data in the distributed processing unit, whether the data of the protocol data unit cached in the distributed processing unit exceeds the maximum time delay configured in the measurement control information, the average retransmission times of a wireless link layer control protocol, whether the retransmission times of a certain wireless link layer control protocol data unit exceeds the maximum retransmission times configured in the measurement control information, the average retransmission times of hybrid automatic retransmission requests, and whether the retransmission times of a certain hybrid automatic retransmission request data packet exceeds the maximum retransmission times configured in the measurement control information.

An embodiment of the present invention provides a transmission control apparatus, including a memory and a processor, where the memory stores a program that, when read and executed by the processor, performs the following operations:

receiving measurement control information of downlink data transmission quality sent by a centralized processing unit;

and measuring according to the measurement control information, and reporting a measurement report or an abnormal transmission quality indication to the centralized processing unit.

In an optional embodiment of the present invention, the performing the measurement according to the measurement control information at least includes one of:

monitoring the transmission quality of all service data of the distributed processing units;

and reporting a measurement report or an abnormal transmission quality indication to the centralized processing unit in an eventuality manner.

In an optional embodiment of the invention, the measuring comprises indicating one of:

Compared with the prior art, in the embodiment of the invention, the centralized processing unit sends the measurement control information of the downlink data transmission quality to the distributed processing unit; and receiving a measurement report or a transmission quality abnormal indication reported by the distributed processing unit. The method of the invention can realize that the CU can actively configure the measurement of the DU downlink data transmission quality, and the DU can correspondingly report a corresponding measurement report or an abnormal indication of the DU transmission quality or a recovery indication of the DU transmission quality according to the measurement configuration of the CU and inform the CU of the service data transmission quality condition of the node in time. The CU can adopt measures such as reporting abnormity to a higher layer according to the measurement report or the transmission quality abnormity indication, or scheduling data to other links with higher transmission quality in time for transmission in the case of double connection or multiple connection, and the like to improve the transmission quality of the user data.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.

FIG. 1 is a schematic diagram of an OPTION2 OPTION3 CU-DU high-level separation scheme data plane interface in the related art;

FIG. 2 is a schematic diagram of a CU-DU measurement control device according to a second embodiment of the present invention;

fig. 3 is a control flow diagram of measurement of a DU initiated by a CU in a process of adding one DU to a cell according to a third embodiment of the present invention;

fig. 4 is a flowchart illustrating that a CU initiates a measurement control modification process on a DU in a cell modification process according to a fourth embodiment of the present invention;

fig. 5 is a control flow diagram of CU initiating measurement on a DU during a process of establishing a service bearer between a UE and a new DU according to a fifth embodiment of the present invention;

fig. 6 is a control flow diagram of CU initiating measurement on DU during UE and new DU service modification according to a sixth embodiment of the present invention;

fig. 7 is a flowchart of processing, by a CU according to a seventh embodiment of the present invention, a downlink data transmission quality measurement report or a transmission quality abnormal indication is reported according to a DU;

fig. 8 is a flowchart of a multi-connection CU according to a downlink data transmission quality measurement report reported by a DU or a transmission quality abnormal indication, where the CU schedules abnormal service data to another DU for transmission in the embodiment of the present invention.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.

Example one

The present embodiment provides a transmission control method, including:

CU sends the measurement control information of the downlink data transmission quality to DU;

and receiving a measurement report or an abnormal transmission quality indication reported by the DU.

In an optional embodiment of the present invention, the CU may configure measurement control information of downlink data transmission quality for the DU through a control plane interface between the CU and the DU. The measurement control information may be a DU node level or a user equipment service level. The DU may support two levels of measurement, or one of the levels of measurement, depending on the measurement control.

Wherein the DU node level refers to: the measurement control of the downlink transmission quality of the DU node indicates that the DU is used as a node concept and the transmission quality of all service data on the DU needs to be measured as a whole;

the user equipment service level refers to: the downlink data transmission quality of one or more services of one or more user equipments carried on the DU node is measured. I.e. the transmission quality of the traffic data of the active device can be measured separately.

In an optional embodiment of the present invention, the sending, by the CU, the measurement control information of the downlink data transmission quality to the DU may be performed in one of the following manners:

in the process of establishing a cell, configuring measurement control information aiming at the downlink transmission quality of user plane data of a DU for the DU under the control of a CU in the cell; wherein, the measurement control for the DU transmission quality in the cell establishment process may be at the level of the DU node;

or, in the cell modification process, modifying the measurement control information of the downlink transmission quality of the user plane data of the DU for the DU controlled by a CU in the cell; wherein, the measurement control for DU transmission quality in the cell modification process may be at the DU node level;

or, when a DU is added to the UE service connection (that is, when the DU establishes the service connection with the UE), the CU may configure measurement control for the downlink data transmission quality of the service carried by the UE in the DU on the DU; wherein, the measurement control for the DU transmission quality in the connection establishment process between the ue and the DU may be for the ue service level;

or, in the middle of the process of the DU and the UE service (for example, in the process of the DU and the UE modifying the service bearer), the measurement control of the downlink data transmission quality for the service carried by the user is modified on the DU. The measurement control modification for the DU transmission quality in the process of the ue and the DU service may be for the ue service level.

The CU-initiated measurement control content includes at least one of:

and the average time delay of downlink buffer data in the DU indicates that the DU receives a certain PDU data of the CU, and the measurement item is buffered in a sending buffer area of the DU to be sent until the PDU is sent out by the DU. The measurement item supports periodic reporting configuration or event type reporting configuration, and the measurement item is for the level of the DU node or the level of the user service.

The PDU data cached in the DU exceeds the maximum time delay configured in the CU measurement control, the measurement item indicates that the DU receives a certain PDU data of the CU, and the PDU data is cached in a sending buffer of the DU to be sent, but the DU does not send the PDU successfully until the maximum time delay configured by the measurement control is overtime. The measurement item only supports event type reporting, and can be reported after the event occurs. The measurement item is for the DU node level and also for the user traffic level.

RLC average number of retransmissions. In CU-DU separation, the RLC layer ARQ is located on the DU side in option2, and the measurement term can be configured in option 2. This measurement indicates the average number of retransmissions of the DU RLC layer when sending RLC packets. The measurement item supports periodic reporting configuration or event type reporting configuration, and the measurement item is for the DU node level or for the user service level.

The number of RLC PDU retransmissions exceeds the CU configured maximum number of retransmissions, and the measurement item can be configured in option 2. The measurement item indicates the maximum retransmission times configured by the CU, which are exceeded by the retransmission times of a certain RLC data packet when the DU RLC layer transmits the data packet. Usually the maximum number of RLC retransmissions configured by the CU is smaller than the maximum number of retransmissions configured by the DU RLC protocol layer. The measurement item only supports event type reporting configuration, and can be reported after the event occurs. The measurement items are for the DU node level and also for the user equipment traffic level.

The measurement item indicates the average retransmission times of the HARQ layer of the DU when transmitting the data packet. The measurement item supports periodic reporting configuration or event type reporting configuration, and the measurement item is for the DU node level or for the user service level.

The retransmission times of a certain HARQ data packet exceed the maximum retransmission times configured in the measurement control configured by the CU. The measurement item indicates that when the DU HARQ layer sends a data packet, the retransmission number of a certain HARQ data packet exceeds the maximum retransmission number configured by the CU. Usually, the maximum number of HARQ retransmissions configured by the CU is smaller than the maximum number of retransmissions configured by the DU HARQ protocol layer. The measurement item only supports event-type reporting configuration, and the measurement item is either for the DU node level or for the user service level.

In an optional embodiment of the invention, the method further comprises: and after the CU judges that the DU is transmitted abnormally or receives a transmission quality abnormal instruction according to the measurement report, if the DU is connected with more than one unit currently, the CU schedules abnormal service data on the distributed processing unit to another distributed processing unit for transmission. If the whole DU is abnormal, all the service data on the DU can be scheduled to another DU for transmission, and if the service of a certain UE on the DU is abnormal, the abnormal service of the UE can be scheduled to the other DU for transmission. The scheduling method comprises the following steps:

the CU sends a PDU status polling packet to the UE and requires the UE to report the receiving condition of the downlink data packet;

after receiving the PDU status report reported by the user equipment, the UE determines unsuccessfully transmitted service data according to the PDU status report;

the CU schedules the unsuccessfully transmitted traffic data to another DU for transmission.

It should be noted that, when all the service data in the failed DU is scheduled to another DU for transmission, a PDU status poll packet needs to be sent to each UE in the DU (failed DU), and the unsuccessfully transmitted service data is determined according to the PDU status report returned by the UE.

In an optional embodiment of the present invention, further comprising: and after the CU judges that the DU transmission is abnormal or receives the transmission quality abnormal indication according to the measurement report, if the DU transmission is currently in single connection, the CU reports the transmission abnormality to a high layer and executes subsequent processing according to the indication of the high layer. In an embodiment, the performing subsequent processing according to the indication of the higher layer includes:

when the CU reports that DU transmission is abnormal to the high layer and the high layer judges that the DU needs to be released, the CU initiates a process of deleting the DU to the DU;

and when the CU reports that the service transmission quality of the UE is abnormal to the high layer, the service of the UE is transferred to other DUs according to the indication of the high layer, or the service of the UE is released.

The following describes processing in each case.

If DU reports transmission quality abnormal indication directly, if node transmission is abnormal:

under the condition of single connection, the CU can report DU transmission abnormity to a high layer and execute subsequent operation according to the high layer indication;

under the condition of multi-connection, the CU can directly schedule the service data of all the user equipment on the failed DU to another DU for transmission;

if the DU reports the transmission quality abnormal indication of the service of a certain UE, then:

under the condition that the UE is in single connection, the CU can report the abnormal service transmission of a certain UE of the DU to a high layer and carry out subsequent processing according to the high layer indication;

in the multi-connection state of the UE, a CU may schedule the abnormal traffic data of the UE to another DU (i.e. another DU to which the UE is connected) for transmission.

If the DU reports a measurement report, the CU may determine whether the DU is abnormal in transmission according to the measurement report. If the CU judges that DU transmission is abnormal:

under the condition of single connection, reporting the CU to a high layer, and executing subsequent operation according to the high layer indication;

under the condition of multi-connection, a CU can directly schedule all user service data on a failed DU to another DU for transmission;

if the reported service transmission quality of a certain UE is abnormal, the following steps are carried out:

under the condition of single connection, the CU can report exception of service transmission of a certain UE of the DU to a high layer and execute subsequent operation according to high layer indication;

in case of multi-connection, CU may schedule the abnormal traffic data of the UE to another DU for transmission.

In another embodiment, there is provided a transmission control method including:

the DU receives the measurement control information of the downlink data transmission quality sent by the CU;

and the DU carries out measurement according to the measurement control information and reports a measurement report or an abnormal transmission quality indication to the CU.

In an optional embodiment of the present invention, the performing, by the DU, the measurement according to the measurement control information at least includes one of:

monitoring the transmission quality of all the service data of the DU;

and monitoring the transmission quality of the service data of one or more user equipments borne by the DU.

Specifically, after receiving measurement control information of the CU about the DU transmission quality, the DU monitors the data transmission quality at the level of the node of the DU or the data transmission quality at the level of the UE service carried by the DU according to the content in the measurement control information during the data transmission of the DU, and feeds back a measurement report or an abnormal transmission quality indication to the CU according to the monitoring result, where the feedback may be periodically reported or event reported according to different configuration items of measurement control.

The DU may report a measurement report to the CU periodically or in an event according to the measurement configuration, and the CU determines whether the DU transmission quality is abnormal. The DU may directly report, according to the measurement control configuration, an indication of abnormal transmission quality of the DU node to the CU after a certain measurement event occurs, for example, after a certain measurement item is greater than or less than a certain threshold, or an indication of abnormal transmission quality of certain service data of a certain UE that is being carried. If the DU reports the abnormal indication once, the DU can determine that the transmission quality has recovered after a certain measurement event occurs, and if a certain measurement event is greater than or less than a certain threshold, directly report a DU node transmission recovery indication or a data transmission recovery indication of a certain UE service to the CU. In addition, if the physical layer reports a link failure indication, the DU may report the physical layer link failure indication to the CU.

the average downlink buffer data time delay in the distributed processing unit, whether PDU data buffered in the distributed processing unit exceeds the maximum time delay configured in the measurement control information, the average RLC retransmission times, whether the retransmission times of a certain RLC PDU exceeds the maximum retransmission times configured in the measurement control information, the average hybrid automatic retransmission request retransmission times, and whether the retransmission times of a certain hybrid automatic retransmission request data packet exceeds the maximum retransmission times configured in the measurement control information.

Example two

As shown in fig. 2, the present embodiment provides a transmission control apparatus 10, which may be disposed on a CU, including:

a measurement control configuration module 101 configured to send measurement control information of downlink data transmission quality to the DU;

the measurement report processing module 102 is configured to receive a measurement report or an indication of abnormal transmission quality reported by a DU.

In an alternative embodiment of the present invention, the measurement report processing module 102 may be further configured to,

and after judging that the DU transmission is abnormal or receiving the transmission quality abnormal indication according to the measurement report, if the DU transmission is currently in single connection, reporting the transmission abnormality to a high layer, and executing subsequent processing according to the indication of the high layer.

The subsequent treatment comprises the following steps:

when reporting that DU transmission is abnormal to the high level and the high level judges that the DU node needs to be released, initiating a process of deleting the DU node to the DU;

and when the service transmission quality of the UE reported to the high layer is abnormal, migrating the service of the UE to other DUs according to the indication of the high layer, or releasing the service of the UE.

In an optional embodiment of the present invention, after determining that the DU is abnormal in transmission or receives an indication of abnormal transmission quality according to the measurement report, if the current connection is multi-connection, all the user service data on the DU is scheduled to another DU for transmission, or the abnormal service data on the DU is scheduled to another DU for transmission.

The present embodiment also provides a transmission control apparatus 20, including:

a measurement configuration module 201 configured to receive measurement control information issued by the CU;

a measurement module 202, configured to perform corresponding measurement according to the measurement control information, and generate a measurement report or a transmission quality indicator (which may be a transmission quality abnormal indicator or a transmission quality normal indicator); wherein, a measurement configuration may be generated according to the measurement control information, and then measurement may be performed according to the measurement configuration;

a reporting module 203, configured to report the measurement report or the transmission quality abnormal indication to the CU.

How each module of the device performs processing is not described herein in detail with reference to the method embodiments.

EXAMPLE III

The present embodiment provides that, in the cell establishment process, a CU initiates a measurement control procedure on a DU. Wherein, the measurement control for the DU transmission quality in the cell establishment procedure is at the level of the DU node.

As shown in fig. 3, includes:

in step 301, a cu initiates a CELL establishment REQUEST (CELL _ SETUP _ REQUEST) message to a DU in a CELL establishment process, where the message carries DU ADDITION information (add DU) information to notify the DU that the DU needs to be added to the CELL, and the CELL _ SETUP _ REQUEST message carries measurement control information for DU downlink data measurement.

In step 302, after receiving the CELL _ SETUP _ REQUEST message, the DU parses the measurement control information therein, establishes measurement configuration for downlink user plane data transmission of the DU node, and sends a CELL SETUP COMPLETE (CELL _ SETUP _ COMPLETE) message to the CU, where the CELL SETUP COMPLETE message carries status information of whether measurement control SETUP is successful or not.

Example four

The present embodiment provides a procedure for CU to initiate measurement control modification on DU during cell modification. Wherein, the measurement control for the DU transmission quality in the cell modification procedure is at the DU node level.

As shown in fig. 4, in the cell modification process provided in this embodiment, the flow of the CU initiating measurement control modification on the DU includes:

in step 401, a cu initiates a CELL MODIFICATION REQUEST (CELL MODIFICATION REQUEST) message to a DU to notify the DU that the DU configuration needs to be modified in a CELL MODIFICATION process, and the CELL MODIFICATION REQUEST message carries measurement control information for DU downlink data measurement.

Step 402: after receiving the CELL _ MODIFICATION _ REQUEST message, the DU parses the measurement control information therein, modifies the measurement configuration for downlink user plane data transmission of the DU node, and returns a CELL MODIFICATION completion (CELL _ MODIFICATION _ COMPLETE) message to the CU, where the CELL MODIFICATION completion message carries state information of whether measurement control MODIFICATION is successful or not.

EXAMPLE five

The present embodiment provides a measurement and control process for CU to transmit quality of a service established by UE on a DU, in a procedure of establishing a service bearer between the UE and a new DU. The measurement control in the process of establishing service bearer by UE and a new DU is directed to the UE service level.

As shown in fig. 5, the UE has already established a service bearer with a DU (the DU is referred to as an original DU, and is not shown in fig. 5), and needs to establish a service bearer with a new DU (referred to as a Target DU, i.e., a Target DU), including:

in step 501, in the process of establishing service connection between the target DU and the UE, the CU initiates a DU ADDITION REQUEST (DU ADDITION REQUEST) message to the target DU to notify the target DU to establish a service bearer of the UE, where the DU ADDITION REQUEST message carries measurement control information for downlink data measurement of the UE service borne by the target DU.

Step 502: after receiving the DU _ ADDITION _ REQUEST message, the target DU parses the measurement control information therein, establishes measurement configuration for downlink user plane data transmission of the UE-specific service, and returns a DU ADDITION _ ACKNOWLEDGE message to the CU, where the DU ADDITION ACKNOWLEDGE message carries status information of whether measurement control is successfully established.

Step 503, the cu sends an RRC Reconfiguration (RRC _ Connection _ Reconfiguration) message to the UE on the original DU path;

step 504, completing the path preparation from the UE to the target DU;

in step 505, the ue returns an RRC Reconfiguration complete (RRC _ Connection _ Reconfiguration) message to the CU on the newly established DU path or the original DU path.

Example six

The present embodiment provides a measurement control procedure related to the CU measuring the transmission quality of the UE modification service on the DU during the UE and DU modification service bearer. The measurement control in the UE and DU service bearer modification procedure is for the UE service level.

As shown in fig. 6, includes:

in step 601, during the process of modifying connection between the DU and the UE service bearer, the CU initiates a DU MODIFICATION REQUEST (DU _ MODIFICATION _ REQUEST) message to the DU to notify the DU to modify the UE service bearer, and in the message, the CU carries measurement control information for downlink data measurement of the UE service borne by the DU.

Step 602, after receiving the DU _ MODIFICATION _ REQUEST message, the DU parses the measurement control information therein, sets the measurement configuration of downlink user plane data transmission of the service specified by the UE according to the measurement control information, and returns a DU MODIFICATION acknowledgement (DU _ MODIFICATION _ acknowledgement) message to the CU, where the DU MODIFICATION acknowledgement message carries information on whether measurement control is successfully established.

Step 603, the cu sends an RRC Reconfiguration (RRC _ Connection _ Reconfiguration) message to the UE on the original DU path;

step 604, ue-to-DU service reconfiguration preparation;

in step 605, the UE sends an RRC reconfiguration complete message to the CU.

EXAMPLE seven

This embodiment provides a method for a CU to perform subsequent processing according to a downlink data transmission quality measurement report or a transmission quality abnormal indication reported by a DU.

As shown in fig. 7, includes:

step 701: the DU measures according to the downlink data measurement control information configured by the CU;

wherein the measuring comprises measuring at least one of:

the average time delay of downlink buffer data in DU, the PDU data buffered in DU exceeds the maximum time delay configured in CU measurement control, the average retransmission times of RLC, the retransmission times of a certain RLC PDU exceeds the maximum retransmission times configured in CU measurement control, the average retransmission times of HARQ, and the retransmission times of a certain HARQ data packet exceeds the maximum retransmission times configured in CU measurement control.

In step 702, the DU reports the measurement report to the CU, or the DU reports the transmission quality abnormal indication to the CU according to the measurement result.

In step 703, the cu determines whether to notify a higher layer (e.g. RRC layer) of the DU about the transmission data exception according to the measurement report reported by the DU or the transmission quality exception indication.

And step 704, the CU performs processing according to the high-level indication, and the processing comprises the following steps:

if the measurement report is at DU level and the high level judges that the whole DU node needs to be released, the CU initiates a process of deleting the whole DU node to the DU;

b, if the measurement report is aimed at the UE service level and the high level judges that the UE service needs to be transferred to other DU, the CU initiates a switching process to the DU;

if the measurement report is for UE service level and the high level judges that the UE service needs to be released from the DU, the CU initiates a service release flow to the DU;

d: if the measurement report is for UE traffic class and is currently in a multi-connection situation, the CU may initiate scheduling of abnormal traffic data onto other DUs for transmission.

Example eight

The present embodiment provides a method for implementing scheduling, by a CU under multiple connections, abnormal service data to other DUs for transmission according to a measurement report of downlink data transmission quality reported by the DUs or an indication of abnormal transmission quality. Different from the sixth embodiment, in the present embodiment, a procedure of scheduling data that cannot be successfully transmitted in the DU to other DUs for transmission under a multi-connection condition for the CU is added.

As shown in fig. 8, includes:

step 801, multi-connection service bearer is established between the UE and DU1 and DU 2.

In step 802, the DU1 performs measurements according to the downstream measurement control configured by the CU.

Wherein the measuring comprises measuring at least one of:

average time delay of downlink buffer data in DU1, the PDU data buffered in DU1 exceeds the maximum time delay configured in CU measurement control, average retransmission times of RLC, the retransmission times of a certain RLC PDU exceeds the maximum retransmission times configured in CU measurement control, the average retransmission times of HARQ, and the retransmission times of a certain HARQ data packet exceeds the maximum retransmission times configured in CU measurement control.

In step 803, the DU1 reports the measurement report to the CU, or the DU1 reports the transmission quality abnormality indication to the CU according to the measurement result.

And step 804, the CU determines whether the DU1 data needs to be scheduled to another DU for transmission according to the measurement report or the transmission quality abnormal indication.

In step 805, when the CU determines to schedule the service data of the abnormal DU (DU 1 in this embodiment) to other DUs for transmission, the CU initiates a PDU POLL packet to the UE, and requests the UE to report the reception condition (ACK, NACK) of the downlink data packet.

Wherein, the PDU POLL data packet is a PDCP status POLL packet in the CU-DU OPTION2 architecture, and the PDU POLL data packet is an RLC POLL packet in the OPTION3 architecture.

In step 806, the UE reports a PDU Status Report (PDU _ Status _ Report) to the CU, where the PDU Status Report carries (ACK, NACK) information, and can notify the CU which data is successfully transmitted and which data is failed to be transmitted.

Wherein, the PDU status report is a PDCP status report in the CU-DU OPTION2 framework, and the PDU status report is an RLC status report in the OPTION3 framework.

In step 807, the CU re-initiates retransmission of data that cannot be successfully transmitted in the source DU (DU 1 in this embodiment) on another DU (DU 2 in this embodiment) according to the PDU status report reported by the UE, and schedules the newly transmitted data to the another DU (DU 2 in this embodiment).

Example nine

The present embodiment provides a transmission control apparatus including a memory and a processor, the memory storing a program that, when read and executed by the processor, performs the following operations:

For technical details, reference is made to the first embodiment, which is not described herein again.

In another embodiment, a centralized processing unit including the transmission control apparatus is also provided.

EXAMPLE ten

In an optional embodiment of the present invention, the reporting of the measurement report or the transmission quality abnormal indication to the centralized processing unit includes:

the average time delay of downlink buffer data in the distributed processing unit, whether PDU data buffered in the distributed processing unit exceeds the maximum time delay configured in the measurement control information, the average retransmission times of RLC, whether the retransmission times of a certain RLC PDU exceeds the maximum retransmission times configured in the measurement control information, the average retransmission times of hybrid automatic retransmission requests, and whether the retransmission times of a certain hybrid automatic retransmission request data packet exceeds the maximum retransmission times configured in the measurement control information.

The invention also provides a distributed processing unit comprising the transmission control device.

In the above embodiments of the present invention, the description of each embodiment has its own emphasis, and reference may be made to the related description of other embodiments for parts that are not described in detail in a certain embodiment.

The above-described means or modules, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A transmission control method, comprising:

receiving a measurement report or a transmission quality abnormal indication reported by the distributed processing unit;

the method further comprises the following steps: and after the centralized processing unit judges that the distributed processing unit is abnormal in transmission or receives the indication of abnormal transmission quality according to the measurement report, if the distributed processing unit is currently in single connection, the centralized processing unit reports the abnormal transmission to a high layer and executes subsequent processing according to the indication of the high layer.

2. The method of claim 1, wherein the measurement control information comprises at least one of:

3. The method of claim 1, wherein the sending, by the centralized processing unit, measurement control information of downlink data transmission quality to the distributed processing units comprises:

4. The method of claim 1, wherein the measurement control information comprises a measurement instructing the distributed processing unit to perform at least one of:

5. The method of claim 1, wherein the performing subsequent processing according to the indication of the higher layer comprises:

6. The method of any of claims 1 to 5, further comprising: after the centralized processing unit judges that the distributed processing unit is abnormal in transmission or receives an abnormal transmission quality indication according to the measurement report, if the distributed processing unit is currently in multi-connection, the centralized processing unit schedules abnormal service data on the distributed processing unit to another distributed processing unit for transmission.

7. The method of claim 6, wherein the centralized processing unit scheduling exception traffic data on the distributed processing unit for transmission on another distributed processing unit comprises:

the centralized processing unit sends a protocol data unit state polling packet to the user equipment and requires the user equipment to report the receiving condition of a downlink data packet;

8. A transmission control apparatus, comprising:

the measurement control configuration module is set to send the measurement control information of the downlink data transmission quality to the distributed processing unit;

a measurement report processing module configured to receive a measurement report or an indication of abnormal transmission quality reported by the distributed processing unit;

the measurement report processing module is further configured to, after determining that the distributed processing unit is abnormal in transmission or receives the transmission quality abnormal indication according to the measurement report, report the transmission abnormality to a higher layer if the current connection is a single connection, and execute subsequent processing according to the indication of the higher layer.

9. The apparatus of claim 8, wherein the measurement control information comprises at least one of:

10. The apparatus of claim 8, wherein the measurement control configuration module sending measurement control information of downlink data transmission quality to a distributed processing unit comprises:

or, the measurement control configuration module sends the measurement control information to the distributed processing unit in a process that the distributed processing unit and the user equipment modify the service bearer.

11. The apparatus of claim 8, wherein the measurement control information comprises measurements instructing the distributed processing unit to perform at least one of:

12. The apparatus of claim 8, wherein the measurement report processing module performing subsequent processing according to the indication of the higher layer comprises:

and when the service transmission quality of the user equipment is abnormal, the service of the user equipment is transferred to other distributed processing units according to the indication of the high layer, or the service of the user equipment is released.

13. The apparatus according to any one of claims 8 to 12, wherein the measurement report processing module is further configured to, after determining that the distributed processing unit is abnormal in transmission or receives an indication of abnormal transmission quality according to the measurement report, schedule abnormal service data on the distributed processing unit to another distributed processing unit for transmission if the distributed processing unit is currently multi-connected.

14. The apparatus of claim 13, wherein the measurement report processing module to schedule exception traffic data on the distributed processing unit for transmission on another distributed processing unit comprises:

15. A transmission control apparatus comprising a memory and a processor, the memory storing a program that, when read and executed by the processor, performs the following:

the program, when read and executed by the processor, further performs the following: and after judging that the transmission of the distributed processing unit is abnormal or receiving the transmission quality abnormal indication according to the measurement report, if the transmission is currently the single connection, reporting the transmission abnormality to a high layer, and executing subsequent processing according to the indication of the high layer.

16. The apparatus of claim 15, wherein the measurement control information comprises at least one of:

17. The apparatus as claimed in claim 15, wherein said sending measurement control information of the downlink data transmission quality to the distributed processing unit comprises:

18. The apparatus of claim 15, wherein the measurement control information comprises a measurement instructing the distributed processing unit to perform at least one of:

19. The apparatus of claim 15, wherein the performing subsequent processing according to the indication of the higher layer comprises:

20. The apparatus of any of claims 15 to 19, wherein the program when read and executed by the processor further performs the operations of: and after judging that the distributed processing units are abnormal in transmission or receiving an abnormal transmission quality indication according to the measurement report, if the distributed processing units are in multi-connection currently, scheduling the abnormal service data on the distributed processing units to another distributed processing unit for transmission.

21. The apparatus of claim 20, wherein said scheduling exception traffic data on the distributed processing unit for transmission on another distributed processing unit comprises:

22. A transmission control method, comprising:

the distributed processing unit measures according to the measurement control information and reports a measurement report or an abnormal transmission quality indication to the centralized processing unit;

the method further comprises the following steps: after the centralized processing unit judges that the distributed processing unit is abnormal in transmission or receives the transmission quality abnormal indication according to the measurement report, if the distributed processing unit is currently in single connection, the centralized processing unit reports the transmission abnormality to a high layer, and executes subsequent processing according to the indication of the high layer.

23. The method of claim 22, wherein the distributed processing unit performing measurements based on the measurement control information comprises at least one of:

24. The method of claim 22, wherein reporting a measurement report or an indication of transmission quality anomaly to the centralized processing unit comprises at least one of:

25. The method of any of claims 22 to 24, wherein the measurement comprises at least one of:

26. A transmission control apparatus, comprising:

and a reporting module configured to report the measurement report or the transmission quality abnormal indication to the centralized processing unit, so that the centralized processing unit determines, according to the measurement report, that the distributed processing unit is abnormal in transmission or receives the transmission quality abnormal indication, and if the distributed processing unit is currently in single connection, the centralized processing unit reports the transmission abnormality to a higher layer, and executes subsequent processing according to the indication of the higher layer.

27. The apparatus of claim 26, wherein the measuring comprises measuring at least one of:

28. The apparatus as claimed in claim 26, wherein said reporting module reporting said measurement report or said transmission quality anomaly indication to said centralized processing unit comprises at least one of:

29. The apparatus of any of claims 26 to 28, wherein the measurement comprises at least one of:

the average time delay of downlink cache data in the distributed processing unit, whether protocol data unit data cached in the distributed processing unit exceeds the maximum time delay configured in the measurement control information, the average retransmission times of a wireless link layer control protocol, whether the retransmission times of a certain wireless link layer control protocol data unit exceeds the maximum retransmission times configured in the measurement control information, the average retransmission times of a hybrid automatic retransmission request, and whether the retransmission times of a certain hybrid automatic retransmission request data packet exceeds the maximum retransmission times configured in the measurement control information.

30. A transmission control apparatus comprising a memory and a processor, the memory storing a program that, when read and executed by the processor, performs the following:

measuring according to the measurement control information, and reporting a measurement report or an abnormal transmission quality indication to the centralized processing unit; and after the centralized processing unit judges that the distributed processing unit is abnormal in transmission or receives the transmission quality abnormal indication according to the measurement report, if the distributed processing unit is currently in single connection, the centralized processing unit reports the transmission abnormality to a high layer and executes subsequent processing according to the indication of the high layer.

31. The apparatus of claim 30, wherein the performing measurements according to the measurement control information comprises at least one of:

32. The apparatus as claimed in claim 30, wherein said reporting of a measurement report or an indication of transmission quality anomaly to said centralized processing unit comprises at least one of:

33. The apparatus of any of claims 30 to 32, wherein the measurement comprises an indication of one of: