WO2018028391A1 - 进行重传处理的方法和装置 - Google Patents

进行重传处理的方法和装置 Download PDF

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Publication number
WO2018028391A1
WO2018028391A1 PCT/CN2017/093300 CN2017093300W WO2018028391A1 WO 2018028391 A1 WO2018028391 A1 WO 2018028391A1 CN 2017093300 W CN2017093300 W CN 2017093300W WO 2018028391 A1 WO2018028391 A1 WO 2018028391A1
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WO
WIPO (PCT)
Prior art keywords
base station
user equipment
information
data
secondary base
Prior art date
Application number
PCT/CN2017/093300
Other languages
English (en)
French (fr)
Inventor
孙文琦
谭巍
晋英豪
韩锋
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP17838521.7A priority Critical patent/EP3468083B1/en
Publication of WO2018028391A1 publication Critical patent/WO2018028391A1/zh
Priority to US16/272,527 priority patent/US10903941B2/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1685—Details of the supervisory signal the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1858—Transmission or retransmission of more than one copy of acknowledgement message
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0097—Relays

Definitions

  • the present application relates to the field of communications, and in particular, to a method and apparatus for performing retransmission processing.
  • the primary evolved Node B (MeNB) allocates data to the secondary base station, and the secondary base station determines the data by sending the inquiry information to the user equipment and according to the response information of the inquiry information sent by the user equipment. Whether retransmission is required, after the data transmission is successful, the information of successful data transmission is fed back to the primary base station.
  • the existing retransmission mechanism is applied to the 5G NR multi-connection.
  • the retransmission timing is not flexible.
  • the primary base station may not detect the secondary base station transmission failure in time, and use other transmission quality.
  • a retransmission is initiated on the preferred secondary base station, causing the user equipment to have a longer reception delay.
  • the embodiment of the present application provides a method and an apparatus for performing retransmission processing, which can overcome the problem that the receiving time of the user equipment is large due to inflexibility of the retransmission timing.
  • a method for performing a retransmission process includes: the primary base station sending, to the first secondary base station, indication information, where the indication information is used to indicate that the first secondary base station sends data to the user equipment, The primary base station sends the feedback information; the primary base station receives the feedback information sent by the first secondary base station according to the indication information, where the feedback information is used to indicate that the first secondary base station has sent the data to the user equipment; The feedback information is subjected to retransmission processing of the data.
  • the retransmission process may include the following aspects: when the primary base station estimates, according to the feedback information, that the data transmission sent by the first secondary base station is successful, the primary base station may not retransmit the data sent by the first secondary base station; when the primary base station is configured according to When the feedback information estimates that the data transmission sent by the first secondary base station fails, the primary base station may determine that the data sent by the first secondary base station needs to be retransmitted, so that the primary base station may select which secondary base station to retransmit the data that fails to be transmitted.
  • the data sent by the first secondary base station may be all data allocated by the primary base station, or may be part, which is not limited in this application.
  • the secondary base station After the secondary base station is instructed, the secondary base station sends feedback to the primary base station after the data is sent to the user equipment, so that the primary base station can timely grasp the transmission status of each secondary base station, and when estimating data loss on a certain link, the primary The base station performs retransmission processing, making full use of the flexibility of multiple connections, thereby overcoming the inflexibility of retransmission timing.
  • the problem that the reordering delay of the user equipment is large.
  • the method further includes: the primary base station sending, according to the feedback information, query information to the user equipment, where the query information is used to query whether the user equipment is Correctly receiving the data sent by the first secondary base station; the primary base station receives the response information of the query information sent by the user equipment; the primary base station performs a retransmission process according to the feedback information, including: the primary base station according to the feedback The response information of the inquiry information determined by the information is subjected to retransmission processing of the data.
  • the first secondary base station may be one or multiple.
  • the primary base station may also query the user equipment whether the data transmitted by the primary base station to the user equipment is correctly received.
  • the primary base station may also query the user equipment for the transmission status of the multiple base stations at a time, where the primary base station and the multiple secondary base stations may be included.
  • the user equipment can give the transmission status of multiple base stations in the response information of the inquiry information.
  • the primary base station sends the query information to the user equipment based on the feedback information, and performs retransmission processing according to the response information of the received query information, so that the primary base station can detect whether each secondary base station has data loss in time, so as to utilize other data when there is data loss.
  • the retransmission is initiated on the secondary base station with better transmission quality, which can fully utilize the flexibility of multiple connections, thereby reducing the reordering delay.
  • the indication information is further used to indicate that the first secondary base station does not perform the data sent by the first secondary base station Pass processing.
  • the primary base station can query the user equipment for the transmission situation of the multiple secondary base stations at one time, thereby avoiding the problem that the air interface resources are wasted due to the interaction between the secondary secondary base stations and the user equipment.
  • the primary base station performs retransmission processing of the data according to the response information of the query information determined by the feedback information
  • the method includes: the primary base station determines, according to the response information of the query information, that the user equipment does not correctly receive data sent by the first secondary base station; the primary base station sends the data to the second secondary base station, where the second secondary base station is used to send the data The user equipment sends the data.
  • the primary base station may select a suitable secondary base station for retransmission according to the data loss condition, and avoid using the secondary base station with poor transmission status, resulting in a large reordering delay.
  • the primary base station performs retransmission processing of the data according to the response information of the query information determined by the feedback information, The primary base station determines, according to the response information of the query information, that the user equipment does not correctly receive the data sent by the first secondary base station; the primary base station sends a notification message to the first secondary base station, where the notification message is used to indicate the first A secondary base station resends the data to the user equipment.
  • the original secondary base station retransmits data, which can reduce the interface traffic between the base station and the base station.
  • the primary base station sends the query information to the user equipment according to the feedback information, including: the primary base station passes the third auxiliary The base station sends the query information; the primary base station receives the response information of the query information sent by the user equipment, and the primary base station receives the response information of the query information sent by the user equipment by using the third secondary base station.
  • the third secondary base station may be the first secondary base station or the second secondary base station, and may be any one of the multiple connection scenarios.
  • the primary base station may also directly send the inquiry information to the user equipment, and the user equipment directly sends the response information of the inquiry information to the primary base station.
  • the method Before receiving the response information of the inquiry information sent by the user equipment, the method further includes: the primary base station instructing the user equipment to send the response information of the inquiry information to the primary base station by using the fourth secondary base station.
  • the fourth secondary base station may be the first secondary base station, the second secondary base station, or the third secondary base station, and may be any one of the multiple connection scenarios.
  • the primary base station may also instruct the user equipment to directly send response information of the inquiry information to the primary base station.
  • the user equipment is directed by the primary base station, and the path of the response information sent by the user equipment can be indicated in a dynamic or static manner, so that the response information can be transmitted on a more reliable path, and the flexibility of multiple connections is fully utilized.
  • the primary base station sends the query information to the user equipment according to the feedback information, including: the primary base station according to the feedback information And the sending window status of the first secondary base station, and sending the query information to the user equipment.
  • the primary base station may determine the status of the sending window of the secondary base station at this time. If the sending window is not blocked, the primary base station may not send the query information to the user equipment, and if the sending window is blocked at this time, The primary base station sends inquiry information to the user equipment.
  • the indication information may be carried in an add request message or a modify request message sent by the primary base station to the secondary base station, where the feedback information may be carried in the downlink data transmission status message.
  • a second aspect provides a method for performing a retransmission process, where the method includes: the first secondary base station receiving the indication information sent by the primary base station, where the indication information is used to indicate that the first secondary base station sends the first data to the user equipment. And sending, by the first base station, the feedback information to the primary base station, where the first secondary base station sends the feedback information to the primary base station according to the indication information, where the feedback information is used by the primary base station to perform the feedback information. Retransmission processing of the first data.
  • the secondary base station By indicating the secondary base station, the secondary base station feeds back to the primary base station after transmitting the data to the user equipment, so that the primary base station can timely grasp the transmission status of each secondary base station, thereby overcoming the problem of inflexibility of the retransmission timing.
  • the indication information is further used to indicate that the first secondary base station does not perform retransmission processing on the first data sent by the first secondary base station, where The method further includes: the first secondary base station does not perform retransmission processing on the first data according to the indication information.
  • the primary base station can query the user equipment for the transmission situation of the multiple secondary base stations at one time, thereby avoiding the problem that the air interface resources are wasted due to the interaction between the secondary secondary base stations and the user equipment.
  • the method further includes: receiving, by the first secondary base station, a notification message sent by the primary base station, where the notification message is used to indicate The first secondary base station resends the first data to the user equipment.
  • the original secondary base station retransmits data, which can reduce the interface traffic between the base station and the base station.
  • the method further includes: the first secondary base station receiving, by the primary base station, the second secondary base station that is not successfully transmitted. Data; the first secondary base station sends the second data to the user equipment.
  • the primary base station may select a suitable secondary base station for retransmission according to the data loss condition, and avoid using the secondary base station with poor transmission status, resulting in a large reordering delay.
  • a method for performing a retransmission process includes: receiving, by a user equipment, query information that is sent by a primary base station based on feedback information, where the feedback information is used to indicate that the first secondary base station has sent data to the user equipment, The query information is used to query whether the user equipment correctly receives data sent by the first secondary base station; and the user equipment sends response information of the inquiry information to the primary base station.
  • the user equipment receives the inquiry information sent by the primary base station based on the feedback information, and sends the response information of the inquiry information to the primary base station, so that the primary base station can detect whether each secondary base station has data loss in time, so as to adopt other transmission quality when data is lost.
  • a better secondary base station initiates retransmission, making full use of the flexibility of multiple connections, thereby reducing reordering delay.
  • the user equipment receives the query information sent by the primary base station, where the user equipment receives the query information that is sent by the primary base station by using the second secondary base station; The user equipment sends the response information of the inquiry information to the primary base station, and the user equipment sends the response information of the inquiry information to the primary base station by using the second secondary base station.
  • the method before the user equipment sends the response information of the query information to the primary base station, the method further includes: the user equipment And receiving the indication information sent by the primary base station, where the indication information is used to indicate that the user equipment sends the response information of the inquiry information to the primary base station by using the third secondary base station.
  • the user equipment is directed by the primary base station, and the path of the response information sent by the user equipment can be indicated in a dynamic or static manner, so that the response information can be transmitted on a more reliable path, and the flexibility of multiple connections is fully utilized.
  • a fourth aspect provides a method for performing a retransmission process, where the method includes: a packet data convergence protocol PDCP entity of a user equipment receives feedback information sent by a first radio link control RLC entity of the user equipment, where the feedback information is used by And indicating that the first RLC entity has sent data to the primary base station; the PDCP entity of the user equipment performs retransmission processing of the data according to the feedback information.
  • a packet data convergence protocol PDCP entity of a user equipment receives feedback information sent by a first radio link control RLC entity of the user equipment, where the feedback information is used by And indicating that the first RLC entity has sent data to the primary base station; the PDCP entity of the user equipment performs retransmission processing of the data according to the feedback information.
  • the retransmission process may include the following aspects: when the PDCP entity of the user equipment estimates that the data transmission sent by the first RLC entity is successful according to the feedback information, the PDCP entity of the user equipment may not send the data to the first RLC entity. Re-transmitting; when the PDCP entity of the user equipment estimates that the data transmission sent by the first RLC entity fails according to the feedback information, the PDCP entity of the user equipment may determine that the data sent by the first RLC entity needs to be retransmitted, so that the user equipment The PDCP entity may choose which RLC entity to use to retransmit the data for which the transmission failed.
  • the data sent by the first RLC entity may be all data allocated by the PDCP entity of the user equipment, or may be a part, which is not limited in this application.
  • the RLC entity of the user equipment feeds back to the PDCP entity of the user equipment after the data is sent to the primary base station, so that the PDCP entity of the user equipment can timely grasp the transmission status of each RLC entity of the user equipment, thereby overcoming the problem of retransmission timing inflexibility. .
  • the method further includes: the PDCP entity of the user equipment sends, according to the feedback information, query information to the primary base station, where the query information is used to query the Whether the primary base station correctly receives the data sent by the first RLC entity of the user equipment; the PDCP entity of the user equipment receives the response information of the query information sent by the primary base station; and the PDCP entity of the user equipment performs the feedback information according to the
  • the retransmission process includes: the PDCP entity of the user equipment performs retransmission processing of the data according to the response information of the inquiry information determined by the feedback information.
  • the first RLC entity may be one or multiple.
  • the PDCP entity of the user equipment may query the primary base station for the transmission status of multiple RLC entities at a time.
  • the primary base station gives the transmission status of the plurality of RLC entities in the response information of the inquiry information.
  • the PDCP entity of the user equipment sends the query information to the primary base station based on the feedback information, and performs retransmission processing according to the response information of the received query information, so that the PDCP entity of the user equipment can detect whether each RLC entity has data loss in time, so as to facilitate When data loss occurs, retransmission is initiated by using other RLC entities with better transmission quality, which can fully utilize the flexibility of multiple connections, thereby reducing the reordering delay.
  • the PDCP entity of the user equipment performs the weight of the data according to the response information of the query information determined by the feedback information. And the PDCP entity of the user equipment determines, according to the response information of the query information, that the primary base station does not correctly receive data sent by the first RLC entity of the user equipment; and the PDCP entity of the user equipment sends the data to the user equipment The second RLC entity sends the data, and the second RLC entity of the user equipment is used to send the data to the primary base station.
  • the PDCP entity of the user equipment can select an appropriate RLC entity for retransmission according to the data loss, and avoid the continuous use of the RLC entity with poor transmission status, resulting in reordering delay.
  • the PDCP entity of the user equipment performs retransmission processing according to the response information of the query information determined by the feedback information,
  • the PDCP entity of the user equipment determines that the primary base station does not correctly receive data sent by the first RLC entity of the user equipment according to the response information of the query information; the PDCP entity of the user equipment sends a first RLC entity to the user equipment.
  • sending a notification message the notification message is used to indicate that the first RLC entity of the user equipment resends the data to the primary base station.
  • the PDCP entity of the user equipment sends the query information to the primary base station according to the feedback information, including: the user equipment The PDCP entity sends the inquiry information to the primary base station according to the feedback information and the transmission window status of the first RLC entity of the user equipment.
  • the PDCP entity of the user equipment may determine the status of the sending window of the first RLC entity after receiving the feedback information. If the sending window is not blocked, the PDCP entity of the user equipment may not send the query information to the primary base station. If the transmission window is blocked at this time, the PDCP entity of the user equipment sends the inquiry information to the primary base station.
  • a fifth aspect provides a method for performing a retransmission process, where the method includes: receiving, by a first RLC entity of the user equipment, indication information sent by the primary base station, where the indication information is used to indicate that the first RLC entity of the user equipment is in the direction After the first base station sends the first data, the primary base station sends feedback information to the PDCP entity of the user equipment.
  • the first RLC entity of the user equipment sends a PDCP to the user equipment after transmitting the first data to the primary base station according to the indication information.
  • the entity sends the feedback information, and the feedback information is used by the PDCP entity of the user equipment to perform retransmission processing of the first data.
  • the PDCP entity of the user equipment can timely grasp the transmission status of each RLC entity, thereby overcoming the problem of retransmission timing inflexibility. .
  • the indication information is further used to indicate that the first RLC entity of the user equipment does not retransmit the first data sent by the first RLC entity.
  • the method further includes: the first RLC entity of the user equipment does not perform retransmission processing on the first data according to the indication information.
  • the PDCP entity of the user equipment can query the primary base station for the transmission status of the multiple RLC entities at one time, thereby avoiding the interaction between the respective RLC entities and the primary base station, thereby causing the air interface.
  • the problem of wasting resources By indicating that the RLC entity of the user equipment does not perform the retransmission process, the PDCP entity of the user equipment can query the primary base station for the transmission status of the multiple RLC entities at one time, thereby avoiding the interaction between the respective RLC entities and the primary base station, thereby causing the air interface. The problem of wasting resources.
  • the method further includes: receiving, by the first RLC entity of the user equipment, a notification message sent by the PDCP entity of the user equipment, where the notification message is used to indicate that the first RLC entity of the user equipment resends the first data to the primary base station.
  • the method further includes: receiving, by the first RLC entity of the user equipment, the user equipment that is sent by the PDCP entity of the user equipment The second RLC entity does not transmit the succeeding second data; the first RLC entity of the user equipment sends the second data to the primary base station.
  • the PDCP entity of the user equipment can select an appropriate RLC entity for retransmission according to the data loss, and avoid the continuous use of the RLC entity with poor transmission status, resulting in a large reordering delay.
  • a method for performing a retransmission process includes: the primary base station receiving the query information sent by the PDCP entity of the user equipment based on the feedback information, where the feedback information is used to indicate that the first RLC entity of the user equipment has been Sending data to the primary base station, the query information is used to query whether the primary base station correctly receives data sent by the first RLC entity; and the primary base station sends response information of the query information to the PDCP entity of the user equipment.
  • the primary base station receives the query information sent by the PDCP entity of the user equipment based on the feedback information, and sends the response information of the query information to the PDCP entity of the user equipment, so that the PDCP entity of the user equipment can detect whether each RLC entity has data loss in time.
  • the retransmission is initiated by using other RLC entities with better transmission quality, which can fully utilize the flexibility of multiple connections, thereby reducing the reordering delay.
  • apparatus for performing a retransmission process for performing the method of any of the first aspect or the first aspect of the first aspect.
  • the apparatus comprises means for performing the method of any of the above-described first aspect or any of the possible implementations of the first aspect.
  • apparatus for performing a retransmission process for performing the method of any of the above-described second aspect or any of the possible implementations of the second aspect.
  • the apparatus comprises means for performing the method of any of the above-described second aspect or any of the possible implementations of the second aspect.
  • an apparatus for performing a retransmission process for performing the method of any of the above-described third or third aspects of the possible implementation comprises means for performing the method of any of the possible implementations of the third aspect or the third aspect described above.
  • an apparatus for performing a retransmission process for performing the method of any of the above-described fourth aspect or any of the possible implementations of the fourth aspect comprises means for performing the method of any of the above-described fourth or fourth aspects of the fourth aspect.
  • an apparatus for performing a retransmission process for performing the method of any of the above fifth aspect or any of the possible implementations of the fifth aspect.
  • the apparatus comprises means for performing the method of any of the possible implementations of the fifth or fifth aspect above.
  • an apparatus for performing a retransmission process for performing the method of any of the sixth or sixth aspect of the foregoing comprises means for performing the method of any of the possible implementations of the sixth or sixth aspect described above.
  • an apparatus comprising: a memory, a processor, a transceiver, a communication interface, and a bus system.
  • the memory, the processor, the transceiver, and the communication interface are connected by a bus system for storing instructions for executing instructions stored by the memory, and when the instructions are executed, the processor is executed by the communication interface.
  • an apparatus comprising: a memory, a processor, a transceiver, a communication interface, and a bus system.
  • the memory, the processor, the transceiver, and the communication interface are connected by a bus system for storing instructions for executing instructions stored by the memory, and when the instructions are executed, the processor is executed by the communication interface.
  • an apparatus comprising: a memory, a processor, a transceiver, a communication interface, and a bus system.
  • the memory, the processor, the transceiver, and the communication interface are connected by a bus system for storing instructions for executing instructions stored by the memory, and when the instructions are executed, the processor is executed by the communication interface.
  • an apparatus comprising: a memory, a processor, a transceiver, a communication interface, and a bus system.
  • the memory, the processor, the transceiver, and the communication interface are connected by a bus system for storing instructions for executing instructions stored by the memory, and when the instructions are executed, the processor is executed by the communication interface.
  • an apparatus comprising: a memory, a processor, a transceiver, a communication interface, and a bus system.
  • the memory, the processor, the transceiver, and the communication interface are connected by a bus system for storing instructions for executing instructions stored by the memory, and when the instructions are executed, the processor is executed by the communication interface.
  • an apparatus comprising: a memory, a processor, a transceiver, a communication interface, and a bus system.
  • the memory, the processor, the transceiver, and the communication interface are connected by a bus system for storing instructions for executing instructions stored by the memory, and when the instructions are executed, the processor is executed by the communication interface.
  • a computer storage medium for storing computer software instructions for use in the method of the first aspect above, comprising a program designed to perform the aspects of the first aspect described above.
  • a computer storage medium for storing computer software instructions for use in the method of the second aspect above, comprising a program for performing the second aspect described above.
  • a twenty-first aspect a computer storage medium for storing computer software instructions for use in the method of the third aspect above, comprising a program for performing the third aspect described above.
  • a twenty-second aspect a computer storage medium for storing computer software instructions for use in the method of the above fourth aspect, comprising a program for performing the fourth aspect described above.
  • a computer storage medium for storing computer software instructions for use in the method of the above fifth aspect, comprising a program for performing the fifth aspect described above.
  • a computer storage medium for storing computer software instructions for use in the method of the above sixth aspect, comprising a program for performing the sixth aspect described above.
  • the names of the base station, the user equipment, the PDCP entity, and the RLC entity are not limited to the device or the entity itself. In actual implementation, the devices or entities may appear under other names. As long as the functions of the respective devices are similar to the present application, they are within the scope of the claims and their equivalents.
  • FIG. 1 is a schematic diagram showing an application scenario of the present application
  • FIG. 2 shows a schematic block diagram of a protocol stack architecture in a multi-connection scenario
  • FIG. 3 is a schematic diagram showing a problem that the receiving end reordering delay is long in the prior art
  • FIG. 4 is a schematic block diagram showing a method for performing a retransmission process according to an embodiment of the present application
  • FIG. 5 is a schematic flowchart of a method for performing a retransmission process according to an embodiment of the present application
  • FIG. 6 shows a PDCP header format indicating that the receiving end responds to the PDCP layer inquiry of the transmitting end
  • FIG. 7 is another schematic flowchart of a method for performing a retransmission process according to an embodiment of the present application.
  • FIG. 8 is a schematic block diagram of an apparatus for performing a retransmission process according to an embodiment of the present application.
  • FIG. 9 is another schematic block diagram of an apparatus for performing a retransmission process according to an embodiment of the present application.
  • FIG. 10 is still another schematic block diagram of an apparatus for performing a retransmission process according to an embodiment of the present application.
  • FIG. 11 is still another schematic block diagram of an apparatus for performing a retransmission process according to an embodiment of the present application.
  • FIG. 12 is still another schematic block diagram of an apparatus for performing a retransmission process according to an embodiment of the present application.
  • FIG. 13 is still another schematic block diagram of an apparatus for performing a retransmission process according to an embodiment of the present application.
  • FIG. 14 is still another schematic block diagram of an apparatus for performing a retransmission process according to an embodiment of the present application.
  • FIG. 15 is still another schematic block diagram of an apparatus for performing a retransmission process according to an embodiment of the present application.
  • FIG. 16 is still another schematic block diagram of an apparatus for performing a retransmission process according to an embodiment of the present application.
  • FIG. 17 is still another schematic block diagram of an apparatus for performing a retransmission process according to an embodiment of the present application.
  • FIG. 18 is still another schematic block diagram of an apparatus for performing a retransmission process according to an embodiment of the present application.
  • FIG. 19 is still another schematic block diagram of an apparatus for performing a retransmission process according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • 5G fifth-generation mobile Communication technology
  • the technical solutions of the embodiments of the present application can be applied to various communication systems based on non-orthogonal multiple access technologies, such as a sparse code multiple access (SCMA) system, and a low-density signature (Low). Density Signature (LDS) system, etc., of course, the SCMA system and the LDS system may also be referred to as other names in the communication field; further, the technical solution of the embodiment of the present application can be applied to multi-carrier using non-orthogonal multiple access technology.
  • SCMA sparse code multiple access
  • LDS Density Signature
  • the transmission system uses, for example, non-orthogonal multiple access technology, Orthogonal Frequency Division Multiplexing (OFDM), Filter Bank Multi-Carrier (FBMC), Generalized Frequency Division Multiplexing (GFDM), Filtered Orthogonal Frequency Division Multiplexing (Filtered-OFDM, F-OFDM) system, and the like.
  • OFDM Orthogonal Frequency Division Multiplexing
  • FBMC Filter Bank Multi-Carrier
  • GFDM Generalized Frequency Division Multiplexing
  • Filtered-OFDM Filtered-OFDM, F-OFDM
  • the terminal device may be referred to as a User Equipment (UE), a terminal device, a Mobile Station (MS), a Mobile Terminal (MT), or a future 5G network.
  • a terminal device or the like the terminal device can communicate with one or more core networks via a Radio Access Network (RAN), for example, the terminal can be a mobile phone (or "cellular" phone) or have The computer or the like of the mobile terminal, for example, the terminal may also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges voice and/or data with the wireless access network.
  • RAN Radio Access Network
  • the terminal can be a mobile phone (or "cellular" phone) or have
  • the computer or the like of the mobile terminal for example, the terminal may also be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges voice and/or data with the wireless access network.
  • the network device may be a Global System of Mobile communication (GSM) or a Base Transceiver Station (BTS) in Code Division Multiple Access (CDMA), or may be a Wideband Code Division Multiple Access (Wideband).
  • GSM Global System of Mobile communication
  • BTS Base Transceiver Station
  • CDMA Code Division Multiple Access
  • Wideband Wideband Code Division Multiple Access
  • FIG. 1 is a schematic diagram of an application scenario of the present application.
  • the network device around the terminal device 130 includes a primary network device 110 and at least one secondary network device 120.
  • the at least one secondary network device 120 is respectively connected to the primary network device 110 to form a multi-connection, and is respectively connected to the terminal device 130 to provide services thereto.
  • the primary network device 110 can be an LTE network
  • the secondary network device 120 can be an NR network.
  • the primary network device 110 may be an NR network
  • the secondary network device 120 may be an LTE network.
  • both the primary network device 110 and the secondary network device 120 are NR networks.
  • the application scenario of the technical solution is not limited in this application.
  • the terminal device 130 can establish a connection through the primary network device 110 and the secondary network device 120 at the same time.
  • the connection established between the terminal device 130 and the primary network device 110 is a primary connection
  • the connection established between the terminal device 130 and the secondary network device 120 is a secondary connection.
  • the control signaling of the terminal device 130 can be transmitted through the primary connection
  • the data of the terminal device can be transmitted simultaneously through the primary connection and the secondary connection, or can be transmitted only through the secondary connection.
  • the primary network device 110 may select the secondary network device 120 that meets the preset condition to transmit the data of the terminal device 130, thereby further reducing the load of the primary network device 110.
  • the preset condition may be that the link quality between the secondary network device 120 and the terminal device 130 satisfies the data transmission condition.
  • the secondary network device 120 can be flexibly deployed according to service requirements and user density. Its role may be to assist the primary network device 110 to share data.
  • the deployment of the secondary network device 120 may be discontinuous, and the adjacent secondary cells may also have a large area overlap. This embodiment of the present application does not limit this.
  • the bearer is a basic unit for controlling the capacity, delay, and bit rate of the user service on the radio access network (RAN) side.
  • RAN radio access network
  • the primary base station may be, for example, a macro base station (Macrocell), and the secondary base station may be, for example, a microcell base station (Microcell), a picocell base station (Picocell), or a femtocell base station (Femtocell), but the embodiment of the present application Not limited to this.
  • Mocrocell macro base station
  • Pocell picocell base station
  • Femtocell femtocell base station
  • the primary base station may be an LTE base station
  • the secondary base station is an NR base station
  • the primary base station and the secondary base station may also be NR base stations.
  • the embodiment of the present application is not limited thereto, and the primary base station may also be a GSM network device, a CDMA network device, or the like, and the secondary base station may also be a GSM network device, a CDMA network device, etc., which is not limited in this embodiment of the present application. .
  • the NR protocol stack is based on the LTE protocol stack, and the protocol functions are combined and optimized. If the NR still adopts the LTE protocol layer (Packet Data Convergence Protocol (PDCP)/Wireless) Link Control (Rain Link Control, RLC) / Medium Access Control (MAC)), the multi-connection protocol stack architecture is shown in Figure 2.
  • PDCP Packet Data Convergence Protocol
  • RLC Link Control
  • MAC Medium Access Control
  • the primary base station PDCP entity divides the downlink data into multiple shares and sends the downlink data to the RLC entity of the primary base station and/or the RLC entity of the multiple secondary base stations, and each RLC entity that receives the downlink data sends the downlink data to the user equipment, and each RLC entity Some information is fed back to the PDCP entity of the primary base station through the downlink data transmission state procedure.
  • the information may include at least one of the following: a highest PDCP sequence number received by the user equipment, an E-UTRAN Radio Access Bearer (E-RAB), and a PDCP entity indicating that the primary base station can continue to send to the RLC entity.
  • E-RAB E-UTRAN Radio Access Bearer
  • the amount of data the packet loss of the interface between the base station and the base station, and the like. If there is uplink data, it can also be sent to the PDCP entity of the primary base station along with the downlink data transmission status.
  • the PDCP layer is a data aggregation layer, which can fully utilize the primary evolved Node B (MeNB) and the secondary evolved Node B (SeNB).
  • the radio resource increases the bandwidth that the user equipment (User Equipment, UE) can obtain.
  • retransmission actions may occur at the following three levels.
  • Hybrid Automatic Repeat Request occurring at the MeNB/SeNB MAC layer
  • the bottom layer retransmission is the HARQ of the MAC layer, which quickly recovers data, and HARQ occurs in each MAC entity.
  • the RLC acknowledgment mode is required to be configured.
  • the MAC layer HARQ cannot detect the transmission error, it is processed by the ARQ of the RLC layer, and each RLC layer has an RLC entity.
  • the RLC entity on the network side asks the RLC entity on the user equipment side whether the RLC entity on the user equipment side correctly receives the data, and the RLC entity on the user equipment side sends the response information to the RLC entity on the network side, indicating the data. Correct reception and failure reception.
  • the core network device when there is downlink data transmission on the network side, sends the downlink data to be transmitted to the primary base station, and the PDCP entity of the primary base station can set 9 PDCP Protocol Data Units (PDUs).
  • PDUs PDCP Protocol Data Units
  • the PDCP PDUs of sequence numbers 1 to 3 may be allocated to the RLC entity of the primary base station as shown in FIG. 2, and the PDCP PDUs of sequence numbers 4 to 6 may be allocated to the RLC entity of the secondary base station 1, and the sequence numbers 7 to 9 will be used.
  • the PDCP PDU is allocated to the RLC entity of the secondary base station 2.
  • each RLC entity on the network side After each RLC entity on the network side sends data to each RLC entity of the user equipment, each RLC entity on the network side separately asks the RLC entity of the user equipment whether to correctly receive the corresponding data, and each RLC entity of the user equipment receives the data according to the The query responds to the RLC entity on the corresponding network side.
  • the underlying protocol stack cannot perform data acknowledgement and retransmission due to reconstruction, etc., and the PDCP entity performs data recovery.
  • the PDCP entity retransmits the PDCP PDU that has not been successfully acknowledged by the RLC entity after the handover. This type of retransmission is also supported in the dual connectivity scenario.
  • a new PDCP entity action is added—data recovery.
  • the user equipment After the secondary cell group (SCG) is released/changed, the user equipment retransmits the data confirmed by the RLC entity that has not been reconstructed, and sends the data. Directly inform the transmission status of each RLC entity of the PDCP entity of the primary base station, and the PDCP entity of the primary base station retransmits the lost data due to the path handover.
  • SCG secondary cell group
  • 5G NR has some characteristics different from LTE.
  • 5G NR may use high frequency, and high frequency signal is easy. Under the influence of obstacles, unstable phenomena such as sudden deterioration of link quality may occur. Therefore, directly applying the above retransmission mechanism to the 5G NR multi-connection may cause the following problems.
  • the RLC entity at the transmitting end corresponds to multiple RLC entities
  • the RLC entity is characterized by its own retransmission and reordering functions, but the data from the RLC entities on different links may be out of order, so the receiving end needs to use the reordering function.
  • the PDCP entity of the UE receives data from three RLC entities of the MeNB, the SeNB1, and the SeNB2, respectively. If the quality of the link on the SeNB2 suddenly deteriorates at a certain time t1, the RLC entity on the link After repeated data retransmission, it is confirmed, even if it has not been confirmed, and the maximum number of retransmissions of the RLC is reached.
  • SCG release occurs at time t2, and the receiver performs PDCP data recovery to send a PDCP status report.
  • the PDCP entity retransmits the data that was not correctly received according to the PDCP status report.
  • other links are working normally. Multiple retransmissions and data recovery of the SeNB2 may affect that the correctly transmitted data on other links cannot be submitted to the upper layer in time. The reordering process is completed until time t3, resulting in a long reordering delay, which will have a serious impact on applications with real-time requirements.
  • the retransmission of the RLC layer relies on query and status report feedback.
  • the sender sends an inquiry request under certain conditions, and the receiver responds to the inquiry request and feeds back the RLC status report.
  • the conditions for sending the inquiry include: the number of sent PDUs is greater than a predetermined threshold, the number of bytes sent is greater than a predetermined threshold, the transmission buffer and the retransmission buffer are all empty, and no new data can be transmitted. Wait.
  • the RLC entity generates an inquiry and an RLC status report regardless of whether there is data loss or retransmission, and for multiple connections, each link has its own RLC entity, and thus is in multiple links. Generating queries and RLC status reports are a more redundant approach.
  • the PDCP layer divides the data into several parts and transmits them on the MeNB and multiple SeNBs respectively. In order to confirm a piece of data, it may be all correctly received data, but it needs to be generated on multiple links.
  • the data packets of the RLC query and status report waste the air interface resources, and a higher level of inquiry and retransmission can be considered, that is, the PDCP entity performs inquiry and retransmission, and saves the status report on each link.
  • the present application proposes a new retransmission mechanism, which is mainly applied to the scenario of the future 5G network and NR multi-connection, but the application is not limited thereto.
  • the primary network device and the secondary network device may be macro base stations with larger coverage in the NR system and small base stations with supplementary coverage, and the UE is in an overlapping area covered by multiple base stations, and resources of multiple base stations may be used.
  • the present application takes the NR multi-connection as an example, but the application is not limited thereto.
  • the macro base station and the small base station may be LTE base stations or the like.
  • system and “network” are used interchangeably herein.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • FIG. 4 is a schematic block diagram of a method 200 for performing retransmission processing provided by an embodiment of the present application.
  • the method 200 of FIG. 4 can be applied to the multi-connection scenario shown in FIG. 1 above.
  • the primary base station in the method 200 is the primary network device described above
  • the secondary base station is the secondary network device described above
  • the user equipment is the terminal device described above.
  • the method 200 includes:
  • the primary base station sends indication information to the first secondary base station.
  • the indication information is used to indicate that the first secondary base station sends feedback information to the primary base station after transmitting data to the user equipment.
  • the first secondary base station receives the feedback information sent by the primary base station.
  • the first secondary base station sends the feedback information to the primary base station after transmitting the data to the user equipment according to the indication information sent by the primary base station.
  • the primary base station receives the feedback information sent by the first secondary base station.
  • the primary base station sends the query information to the user equipment according to the received feedback information, and the primary base station asks the user equipment whether the user equipment correctly receives the data sent by the first secondary base station.
  • the user equipment receives the inquiry information sent by the primary base station.
  • the user equipment sends response information of the inquiry information to the primary base station.
  • the primary base station receives response information of the inquiry information sent by the user equipment.
  • the primary base station performs retransmission processing of the data according to the response information of the query information sent by the user equipment.
  • the retransmission process may include the following aspects: when the primary base station estimates, according to the feedback information, that the data transmission sent by the first secondary base station is successful, the primary base station may not retransmit the data sent by the first secondary base station; when the primary base station is configured according to When the feedback information estimates that the data transmission sent by the first secondary base station fails, the primary base station may determine that the data sent by the first secondary base station needs to be retransmitted, so that the primary base station may select which secondary base station to retransmit the data that fails to be transmitted.
  • first secondary base station may be one or multiple, which is not limited in this application.
  • the data sent by the first secondary base station may be all data allocated by the primary base station, or may be part, which is not limited in this application.
  • the PDCP entity of the primary base station is used for retransmission processing, and after the RLC entity on each link transmits data, Feedback to the PDCP entity of the primary base station, so that the PDCP entity of the primary base station can fully utilize the flexibility of the multi-link, select a more reliable link for retransmission, and avoid the heavy use of the poor quality link to cause the user equipment to receive data.
  • the sorting delay is large.
  • a method 300 of performing retransmission processing according to an embodiment of the present application will be described in detail below in conjunction with the flow in FIG. details as follows:
  • the primary base station may send indication information to the secondary base station 1 and/or the secondary base station 2.
  • the secondary base station 1 and/or the secondary base station 2 receive the indication information.
  • the secondary base station 1 and/or the secondary base station 2 send feedback information to the primary base station after transmitting data to the user equipment according to the indication information sent by the primary base station. Similarly, the primary base station receives feedback information sent by the secondary base station 1 and/or the secondary base station 2.
  • the primary base station sends, according to the feedback information sent by the secondary base station 1 and/or the secondary base station 2, query information to the user equipment, where the query information is used to query the user equipment whether to correctly receive the data sent by the secondary base station 1 and/or the secondary base station 2. .
  • the user equipment receives the inquiry information sent by the primary base station.
  • the primary base station may send, to the user equipment, a path indicating sending the response query information, and the user equipment may receive the information indicating the path of the response to the inquiry information.
  • the user equipment may send response information of the inquiry information to the primary base station, where the primary base station receives the response information.
  • the primary base station After receiving the response information sent by the user equipment, the primary base station finds that the data sent by the secondary base station 1 is not correctly received by the user equipment, and needs to be retransmitted. The lost data can be retransmitted by the schemes in steps S308 and S309.
  • the secondary base station 1 transmitting the lost data may have a link failure, and is no longer suitable for retransmission.
  • the primary base station may send the retransmitted data as new data to the secondary base station. 2. Transmission by the secondary base station 2.
  • the secondary base station 2 receives the data lost by the secondary base station 1 transmitted by the primary base station, and transmits the data lost by the secondary base station 1 to the user equipment.
  • the primary base station notifies the secondary base station 1 to retransmit the data in the buffer. After receiving the notification message, the secondary base station 1 transmits the lost data to the user equipment again.
  • whether the PDCP entity of the primary base station uses the ARQ according to the RRC protocol may be that a parameter ARQ_Enableflag is added to the PDCP entity of the primary base station, and when the value is set to 1, the PDCP entity uses the ARQ. When the value is set to 0, the PDCP entity is consistent with the traditional LTE PDCP entity and does not use ARQ.
  • the RLC entity of the primary base station may also be instructed to send feedback information to the PDCP entity of the primary base station after transmitting the data to the user equipment.
  • the PDCP entity of the primary base station may allocate downlink data to be sent to at least one link according to the size of the data volume, where one link corresponds to one RLC sending entity, which may be the primary base station.
  • the RLC entity may also be an RLC entity of the secondary base station.
  • the secondary base station 1 and/or the secondary base station 2 can also receive the indication information sent by the primary base station to implement configuration of the protocol stack. For example, after the secondary base station 1 and the secondary base station 2 send the data allocated by the primary base station, they may be partial data or all data. It is also possible to configure the secondary base station 1 and/or the secondary base station 2 to feed back to the primary base station once every n PDCP PDUs are transmitted. That is, the secondary base station 1 and/or the secondary base station 2 are configured to trigger feedback under certain conditions, and the data plane is notified to the primary base station through the data plane of the interface between the base station and the base station, so that the primary base station can determine the inquiry and retransmission timing. Alternatively, the query can be a poll.
  • the RLC entity of the primary base station may also be configured to feed back to the PDCP entity of the primary base station after the data is transmitted.
  • the indication information indicates that the secondary base station 1 and/or the secondary base station 2 send feedback information to the primary base station after transmitting 50% of the data allocated by the primary base station.
  • the indication information may also indicate that the secondary base station 1 and/or the secondary base station 2 send feedback information to the primary base station after transmitting one PDU.
  • the feedback information may be a sequence number at which the secondary base station 1 or the secondary base station 2 transmits the data at this time.
  • the primary base station can receive the feedback information sent by the secondary base station 1 and the secondary base station 2 at the same time, and can also receive the feedback information sent by the secondary base station 1 and the secondary base station 2 in sequence, and the receiving sequence is not limited.
  • the indication information sent by the primary base station to the secondary base station 1 and/or the secondary base station 2 may be carried in the add request message/modification request message to implement new and reconfiguration of the data radio bearer (DRB).
  • the indication information may also be carried in other existing messages.
  • the present application does not impose any restriction on the information carried by the indication information, as long as the information that the primary base station can send to the secondary base station can carry the indication information, and the existing message is used to carry the indication information.
  • the indication information can be reconfigured by the primary base station to the secondary base station without adding new resources to avoid unnecessary waste of resources.
  • the feedback information sent by the secondary base station 1 and/or the secondary base station 2 to the primary base station may also be carried in an existing message, for example, carried in a downlink data transmission state.
  • the indication information is further used to indicate that the secondary base station 1 and/or the secondary base station 2 do not perform retransmission processing.
  • the indication information is further used to indicate the secondary base station 1 and/or Or the secondary base station 2 does not use ARQ.
  • the primary base station can query the transmission status of the multiple secondary base stations to the user equipment at one time, thereby avoiding the problem that the air interface resources are wasted due to the interaction between the secondary secondary base stations and the user equipment.
  • the embodiment of the present application may also configure the secondary base station by using a core network device or other network device, which is not limited in this application.
  • the receiving and sending feedback information herein may be a direct action between the primary base station and the secondary base station, and it may be said that the feedback information is generated by the secondary base station, but is transmitted from the secondary base station to the primary base station in a certain manner.
  • the primary base station receives the feedback information again and uses the feedback information.
  • the receiving and transmitting feedback information mentioned in the embodiments of the present application is not limited to being directly received and transmitted.
  • the primary base station may directly perform retransmission processing according to the feedback information.
  • the primary base station may set a time window. If the primary base station does not receive the feedback information of the first secondary base station in the time window, or receives the time window The feedback information, the primary base station can estimate that the link transmitting the data is relatively congested, and the primary base station can instruct the other secondary base station to retransmit the part of the data sent by the first secondary base station.
  • the primary base station may send the query information to the user equipment according to the feedback information, and may simultaneously query the user equipment whether the data sent by the secondary base station 1 and the secondary base station 2 is correctly received, and the primary base station may also be in the After receiving the feedback information sent by the secondary base station 1 or the secondary base station 2, the user equipment is directly inquired whether the user equipment correctly receives the data sent by the secondary base station 1 or the secondary base station 2. Under normal circumstances, the user equipment does not respond to the PDCP inquiry of the primary base station.
  • the embodiment of the present application can indicate whether the primary base station needs the user equipment to respond to the inquiry information by setting an inquiry bit in the PDCP header using the 18-bit serial number.
  • PDCP header is a format of a PDCP PDU, where D/C is used to identify a control PDU or a data PDU, P bit can be a certain bit in the first byte, R is a reserved bit, and PDCP SN is sent.
  • the serial number of the PDCP data, DATA indicates the uncompressed PDCP input data/compressed PDCP input data. If the P bit is 1, it means that the user equipment needs to feed back the PDCP status report.
  • Other indications indicating that the user equipment responds to the inquiry information may also be added to the PDCP header. For example, the response of the user equipment to the PDCP challenge of the primary base station can be achieved by setting the R bits in other formats to P bits.
  • the primary base station may also query the user equipment whether the data sent by the primary base station to the user equipment is correctly received.
  • the primary base station queries the user equipment for the transmission status of the plurality of base stations at a time.
  • the user equipment can give the transmission status of multiple base stations in the response information.
  • the primary base station may add a new cell to the PDCP configuration information content of the RRC connection reconfiguration message. If the cell is 1, the primary base station is instructed to configure a static inquiry information feedback path for the user equipment to the primary base station. Specifically, the primary base station may instruct the user equipment to send the response information of the inquiry information to the primary base station by using the secondary base station 1. In other words, as long as the primary base station does not re-instruct the user equipment, the user equipment sends the response information of the inquiry information to the primary base station by the secondary base station 1 by default.
  • the primary base station can select a relatively stable link and initiate an inquiry to the user equipment. In this manner, the user equipment can be directed to send the response information of the inquiry information on a relatively stable link, so as to avoid the response of the inquiry information. Problems such as loss of information. For example, if the primary base station determines that the secondary base station 1 is relatively stable, the primary base station may send the query information to the user equipment through the secondary base station 1. In this case, the user equipment may also send the query information to the primary base station through the secondary base station 1. Response information.
  • the response information of the query information may be the transmission status of multiple secondary base stations, for example, the transmission status of the secondary base station 1 and the secondary base station 2, and the primary base station may learn the transmission status of the secondary base station 1 and the secondary base station 2, thereby Make sure you don't need to resend the data.
  • the response information of the inquiry information received by the primary base station may further include a transmission status of the primary base station.
  • the primary base station after the primary base station determines that the data transmitted by the secondary base station 1 is lost, the primary base station sends the lost data to the secondary base station 2, instructing the secondary base station 2 to resend the data to the user equipment.
  • the secondary base station 2 After receiving the data lost by the secondary base station 1 transmitted by the primary base station, the secondary base station 2 transmits the data as the new data to the user equipment.
  • This retransmission mode is suitable when the quality of the secondary base station that originally transmitted the data becomes poor.
  • the primary base station determines that the data on the secondary base station 1 may be lost, the primary base station notifies the secondary base station 1 to retransmit the data in the buffer. After receiving the notification message, the secondary base station 1 transmits the lost data to the user equipment again.
  • This method is suitable for individual data loss, not for data loss due to link instability or even timeliness.
  • each secondary base station may not send feedback information to the primary base station, that is, does not provide auxiliary information, and may all decide, by the primary base station, when to send the query information to the user equipment, and receive the user.
  • the response information of the inquiry information sent by the device determines whether it is necessary to retransmit the data.
  • the embodiment of the present application may also feed back information about the link status in other manners. For example, the secondary base station may notify the primary base station that the link is in a bad state, and may notify the primary base station by using a parameter, and the primary base station receives the feedback link. After the bad quality information, you can try to retransmit the data on the link on other links.
  • the secondary base station does not consider the current transmission situation, but can determine the link status by a mechanism capable of fully understanding the current link quality, for example, setting the parameter SeNB_link_degradation, and setting the parameter when the link status is not good. If the parameter is 1, and the parameter is fed back to the primary base station, when the primary base station receives the parameter from a secondary base station, it indicates that the possibility of data loss on the secondary base station is relatively large, and the primary base station can allocate the original base station to the secondary base station. The transmitted data is distributed to other secondary base stations for retransmission. When the link status is not good, the parameter SeNB_link_degradation can also be set to zero. The present application does not limit the parameter setting value indicating that the link quality is not good.
  • the primary base station sends the query information to the user equipment according to the feedback information, where the primary base station sends the query information to the user according to the feedback information and the sending window status of the first secondary base station.
  • the device sends the inquiry information.
  • the primary base station receives the feedback information, and can determine the status of the sending window of the secondary base station at this time. If the sending window is not blocked, the primary base station may not send the query information to the user equipment. If the sending window is blocked at this time, the primary base station may Send inquiry information to the user equipment.
  • the primary base station can also use a sliding window mechanism to maintain a transmission window. Regardless of whether multiple secondary base stations send data, the user equipment is only queried according to the situation of the sending window. For example, the sending window cannot be swiped backward, or the data transmission is reached. Half the size of the window, etc.
  • the user equipment feeds back an indication information, and the primary base station does not need to send the inquiry information to the user equipment, and the user equipment can send the response information of the inquiry information to the primary base station.
  • the primary base station may also send the inquiry information to the user equipment by using other trigger conditions, which is not limited by this application.
  • FIG. 5 illustrates detailed steps or operations of the method of performing the retransmission process, but these steps or operations are merely examples, and other operations may be performed in the embodiments of the present application, or variations of the operations in FIG. Moreover, the various steps in FIG. 5 may be performed in a different order than that presented in FIG. 5, and it is possible that not all operations in FIG. 5 are to be performed.
  • the method for performing retransmission processing is performed by the PDCP entity of the primary base station, and the flexibility of selecting a retransmission link is improved, and the PDCP entity of the primary base station can be sent according to multiple links.
  • the data loss caused by the quality deterioration of one of the links is estimated in time, and the retransmission is initiated on other links, and the PDCP entity reordering delay of the user equipment is reduced.
  • the RLC entity does not adopt the ARQ, saves the query information sent by the RLC entity to the user equipment on multiple links, and multiple RLC status reports sent by the user equipment, but is replaced by a response message of the PDCP entity responding to the primary base station.
  • the purpose of the response information is to indicate whether the data is correctly received.
  • the PDCP entity retransmission mechanism does not care which link the data is transmitted on, but queries the current receiving state of the user equipment from a global perspective.
  • the user equipment can respond to the inquiry information sent by the PDCP entity of the primary base station, and can select a path to send the response information of the inquiry information according to the guidance of the network, so that the response information of the inquiry information is transmitted on the link with good quality, and the information is fully utilized.
  • the flexibility of multiple connections is possible.
  • the method for transmitting the downlink data from the network side to the user equipment side is taken as an example to describe the method for performing the retransmission process in the embodiment of the present application.
  • the following is an example of the method in which the user equipment sends the uplink data to the network side as an example.
  • the method of retransmission processing will be described.
  • a method 500 of performing a retransmission process according to an embodiment of the present application will be described in detail below in conjunction with the flow in FIG. details as follows:
  • the PDCP entity of the user equipment receives the first indication information sent by the primary base station, and indicates that the PDCP layer of the user equipment uses the ARQ function.
  • the PDCP entity of the user equipment receives the first indication information, and configures the PDCP entity of the user equipment.
  • the RLC1 and/or the RLC2 of the user equipment respectively receive the second indication information sent by the primary base station, and indicate that the RLC1 and/or the RLC2 of the user equipment send the feedback information to the PDCP entity of the user equipment after sending the data to the network side.
  • the RLC1 and/or the RLC2 of the user equipment respectively send the uplink data 1 and the uplink data 2 to the secondary base station 1 and/or the secondary base station 2.
  • the secondary base station 1 and/or the secondary base station 2 respectively receive the uplink data 1 and the uplink data 2 transmitted by the RLC1 and/or the RLC2 of the user equipment.
  • the secondary base station 1 and/or the secondary base station 2 respectively send the received uplink data 1 and uplink data 2 to the primary base station.
  • the primary base station receives the uplink data 1 and the uplink data 2 through an interface between the base station and the base station, respectively.
  • the RLC1 and/or the RLC2 of the user equipment After sending the uplink data 1 and the uplink data 2 to the network side, the RLC1 and/or the RLC2 of the user equipment send the feedback information to the PDCP entity of the user equipment. Likewise, the PDCP entity of the user equipment receives feedback information sent by RLC1 and/or RLC2.
  • the PDCP layer of the user equipment sends the inquiry information to the primary base station according to the feedback information sent by the RLC1 of the user equipment and/or the RLC2 of the user equipment. Similarly, the primary base station receives the inquiry information sent by the PDCP layer of the user equipment.
  • the primary base station may send response information of the inquiry information to the PDCP layer of the user equipment, and the primary base station receives the response information.
  • the PDCP layer of the user equipment After receiving the response information sent by the primary base station, the PDCP layer of the user equipment determines that the data sent by the RLC1 is not correctly received by the primary base station, and needs to be retransmitted. The lost data can be retransmitted by the schemes in steps S509 and S510.
  • the PDCP entity of the user equipment can send the retransmitted data as new data to the RLC2 and transmit it by the RLC2.
  • the PDCP entity of the user equipment notifies the RLC1 to retransmit the data in the cache. After receiving the notification message, RLC1 transmits the lost data to the primary base station.
  • first RLC entity may be one or multiple, which is not limited in this application.
  • the data sent by the first RLC entity of the user equipment may be all data allocated by the PDCP entity of the user equipment, or may be part, which is not limited in this application.
  • the first indication information may be configuration information, that is, the primary base station configures the PDCP entity of the user equipment to use the ARQ, and specifically, may notify the user equipment by using the parameter that needs to be changed, and the user equipment performs the PDCP entity according to the indication of the primary base station. Change the mode.
  • the procedure for configuring the PDCP entity of the user equipment to use the ARQ is similar to the procedure for configuring the PDCP entity of the primary base station to use the ARQ in the foregoing method 300. For brevity, no further details are provided herein.
  • RLC1 and/or RLC2 of the user equipment configure RLC1 and/or RLC2 of the user equipment.
  • RLC1 and/or RLC2 may be configured to be partial data or all data after transmitting data allocated by the PDCP layer of the user equipment. It is also possible to configure RLC1 and/or RLC2 to feed back to the PDCP entity of the user equipment once every n PDCP PDUs are sent. That is, RLC1 and RLC2 are configured to trigger feedback under certain conditions, and inform the PDCP entity of the user equipment of the data transmission situation, so that the PDCP entity of the user equipment determines the inquiry and retransmission timing.
  • the indication information sent by the primary base station to the user equipment may be carried in the RRC connection reconfiguration message to implement new and reconfiguration of the data radio bearer (DRB).
  • the indication information may also be carried in other existing messages.
  • the present application does not impose any restriction on the information carried by the indication information, as long as the information that the primary base station can send to the user equipment can carry the indication information, and utilize the existing message bearer.
  • the indication information can be reconfigured by the primary base station to the secondary base station without adding new resources to avoid unnecessary waste of resources.
  • the indication information is further used to indicate that the RLC1 and the RLC2 do not use the ARQ function.
  • the PDCP entity of the user equipment can query the primary base station for the transmission of multiple RLC entities at one time, thereby avoiding interaction between the respective RLC entities and the primary base station, thereby causing air interface resources. The problem of wasting.
  • the user equipment may be configured by using the core network device or other network devices in the embodiment of the present application.
  • each link has one RLC entity at the transmitting end and one RLC entity at the receiving end, that is, when the uplink data is sent, the RLC entity of the user equipment will data. It is a RLC entity that is directly sent to the network side, and may be the RLC entity of the primary base station or the RLC entity of the secondary base station.
  • the RLC1 of the user equipment is corresponding to the secondary base station 1, and the RLC2 and the auxiliary equipment of the user equipment are used.
  • Base station 2 corresponds.
  • the receiving and sending feedback information herein may be a direct action between the PDCP entity of the user equipment and the RLC entity of the user equipment, and the feedback information may be generated by the RLC entity of the user equipment, but The method is transmitted from the RLC entity to the PDCP entity, and the PDCP entity receives the feedback information and uses the feedback information.
  • the receiving and transmitting feedback information mentioned in the embodiments of the present application is not limited to being directly received and transmitted.
  • the PDCP entity of the user equipment may send the primary base station according to the feedback information.
  • the PDCP entity of the user equipment can directly query the user equipment whether the primary base station correctly receives the RLC1 of the user equipment and/or the user equipment after receiving the feedback information sent by the RLC1 of the user equipment and/or the RLC2 of the user equipment.
  • the primary base station may send response information of the inquiry information to the PDCP entity of the user equipment.
  • the response information may be the transmission status of the RLC entities of the multiple user equipments, for example, the transmission status of the RLC1 and the RLC2, and the PDCP entity of the user equipment may know the transmission status of the RLC1 and the RLC2, so that it may be determined that the data need not be retransmitted.
  • Step S304 and step S305 of the above method 300 when the uplink data is sent, the process of the PDCP entity of the user equipment inquiring to the primary base station is similar to the process of the PDCP entity of the primary base station inquiring to the user equipment, and the detailed process is not described here. Step S304 and step S305 of the above method 300.
  • the PDCP entity of the user equipment sends the lost data to the RLC2, indicating that the RLC2 is resent to the primary base station.
  • the RLC2 After receiving the lost data of RLC1 sent by the PDCP entity of the user equipment, the RLC2 sends the data to the primary base station as new data.
  • This retransmission mode is suitable when the RLC quality of the original transmission data becomes poor.
  • the PDCP entity of the user equipment determines that the data on the RLC1 may be lost, the PDCP entity of the user equipment notifies the RLC1 to retransmit the data in the buffer. After receiving the notification message, RLC1 transmits the lost data to the primary base station again. This method is suitable for individual data loss, not for data loss due to link instability or even timeliness.
  • each RLC entity may not send feedback information to the PDCP entity of the user equipment, that is, does not provide auxiliary information, and may all be determined by the PDCP entity of the user equipment when to send the query information to the primary base station. And receiving response information of the inquiry information sent by the primary base station to determine whether it is necessary to retransmit the data.
  • the embodiment of the present application may also feed back information about the link status in other manners. For example, the RLC entity may notify the PDCP entity of the user equipment that the current state of the link is not good, and may notify the primary base station, the PDCP entity of the user equipment, by using one parameter. After receiving the information with poor feedback link quality, you can try to retransmit the data on the link on other links.
  • the PDCP entity of the user equipment sends the query information to the primary base station according to the feedback information, including: the PDCP entity of the user equipment, according to the feedback information, and the sending by the first RLC entity The window status, the inquiry information is sent to the primary base station.
  • the PDCP entity of the user equipment receives the feedback information, and can determine the status of the sending window of the RLC entity of the user equipment at this time. If the sending window is not blocked, the PDCP entity of the user equipment may not send the query information to the primary base station. When the transmission window is blocked, the PDCP entity of the user equipment can send inquiry information to the primary base station. The PDCP entity of the user equipment can also use a sliding window mechanism to maintain a transmission window. Regardless of whether multiple RLC entities send data, the primary base station is only queried according to the situation of the sending window. For example, the sending window cannot be swiped backward. Or the data is sent to half the size of the window.
  • the primary base station may send the response information of the inquiry information to the PDCP entity of the user equipment.
  • the PDCP entity of the user equipment may also send the inquiry information to the primary base station by using other trigger conditions, which is not limited in this application.
  • FIG. 7 shows detailed steps or operations of the method of performing the retransmission process, but these steps or operations are merely examples, and other operations may be performed in the embodiments of the present application, or variations of the operations in FIG. Moreover, the various steps in FIG. 7 may be performed in a different order than that presented in FIG. 7, and it is possible that not all operations in FIG. 7 are to be performed.
  • the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be implemented in the present application.
  • the implementation of the examples constitutes any limitation.
  • the method for retransmission processing of the downlink data is applicable to the retransmission processing of the uplink data.
  • the embodiment of the retransmission processing of the downlink data may be specifically referred to, and details are not described herein again.
  • the method for performing the retransmission process is performed by the PDCP entity, and the flexibility of retransmission link selection is improved, and the PDCP entity of the user equipment can be estimated in time according to the transmission condition of multiple links.
  • One of the links is lost due to the quality of the data, and the retransmission is initiated on the other links.
  • the PDCP entity reordering delay of the primary base station is reduced.
  • the RLC entity does not use ARQ, which saves the RLC entity in multiple
  • the interrogation interaction with the primary base station on the link is replaced by the interrogation interaction between the PDCP entity of the user equipment and the primary base station.
  • the PDCP entity retransmission mechanism does not care which link the data is transmitted on, but queries from a global perspective.
  • the current receiving status of the user equipment; the primary base station is capable of responding to the inquiry information sent by the PDCP entity of the user equipment.
  • FIG. 8 shows a schematic block diagram of an apparatus 1000 for performing a retransmission process in accordance with an embodiment of the present application. As shown in FIG. 8, the apparatus 1000 includes:
  • the sending unit 1100 is configured to send, to the first secondary base station, the indication information, where the indication information is used to indicate that the first secondary base station sends the feedback information to the device 1000 after sending the data to the user equipment;
  • the receiving unit 1200 is configured to receive the feedback information that is sent by the first secondary base station according to the indication information, where the feedback information is used to indicate that the first secondary base station has sent the data to the user equipment.
  • the processing unit 1300 is configured to perform retransmission processing of the data according to the feedback information.
  • the foregoing first secondary base station may be one or multiple, which is not limited in this application.
  • the foregoing apparatus 1000 may be a primary base station in a multiple connectivity scenario.
  • the retransmission function can be located in a higher PDCP entity and after the RLC entity on each link transmits data. That is, the PDCP entity of the primary base station feeds back, so that the PDCP entity of the primary base station can fully utilize the flexibility of the multi-link, select a more reliable link for retransmission, and avoid the continuous use of the poor quality link to cause the user equipment to receive data.
  • the reordering delay is large.
  • the processing unit 1300 is specifically configured to:
  • the query information Sending, according to the feedback information, the query information to the user equipment, where the query information is used to query whether the user equipment correctly receives the data sent by the first secondary base station;
  • the data is retransmitted based on the response information of the inquiry information.
  • the device for performing the retransmission process provided by the embodiment of the present application sends the inquiry information to the user equipment based on the feedback information, and performs retransmission processing according to the response information of the received inquiry information, so that the device 1000 can detect whether each of the secondary base stations has a timely detection.
  • the data is lost, so that when there is data loss, the retransmission is initiated by using other secondary base stations with better transmission quality, which can fully utilize the flexibility of multiple connections, thereby reducing the reordering delay.
  • the indication information is further used to indicate that the first secondary base station does not perform retransmission processing on the data sent by the first secondary base station.
  • the device 1000 can be used to query the user equipment for the transmission status of the multiple secondary base stations at one time, thereby avoiding the problem that the air interface resources are wasted due to the interaction between the secondary secondary base stations and the user equipment.
  • the processing unit 1300 is specifically configured to:
  • the second secondary base station may be one or multiple, and the application is not limited thereto.
  • the determining unit may determine one or according to the buffering condition of the other secondary base station or the amount of data that the first secondary base station does not successfully transmit.
  • the plurality of second secondary base stations send the data to the user equipment.
  • the determining unit may select a suitable secondary base station to perform retransmission according to the data loss condition, and avoid using the secondary base station with poor transmission status to cause the reordering delay.
  • the processing unit 1300 is specifically configured to:
  • the primary base station Determining, by the response information of the query information, that the user equipment does not correctly receive the data sent by the first secondary base station; the primary base station sends a notification message to the first secondary base station, where the notification message is used to indicate that the first secondary base station is re- The data is sent to the user device.
  • the original secondary base station retransmits data, which can reduce the interface traffic between the base station and the base station.
  • the determining unit sends the query information to the user equipment according to the feedback information, including: sending the query information by using a third secondary base station; the determining unit receiving the query sent by the user equipment
  • the response information of the information includes: receiving, by the third secondary base station, response information of the query information sent by the user equipment.
  • the apparatus 1000 further includes:
  • the indication unit is configured to instruct the user equipment to send the response information of the inquiry information to the device 1000 through the fourth secondary base station.
  • the user equipment is directed by the device 1000, and the path of the response information sent by the user equipment can be indicated in a dynamic or static manner, so that the response information can be transmitted on a more reliable path, and the flexibility of multiple connections is fully utilized.
  • the apparatus 1000 may correspond to the primary base station in the method 200 and method 300 for performing retransmission processing of the embodiments of the present application, and the above and other operations and/or functions of the respective modules in the apparatus 1000.
  • the corresponding processes of the primary base station in each method of FIG. 4 and FIG. 5 are respectively implemented. For brevity, details are not described herein again.
  • FIG. 9 illustrates an apparatus 2000 for performing a retransmission process in accordance with an embodiment of the present application.
  • the device 2000 includes:
  • the first receiving unit 2100 is configured to receive the indication information that is sent by the primary base station, where the indication information is used to indicate that the first secondary base station sends the feedback information to the primary base station after sending the first data to the user equipment;
  • the first sending unit 2200 is configured to send, according to the indication information, the feedback information to the primary base station after the first at least part of the data is sent to the user equipment, where the feedback information is used by the primary base station to perform the first data. Retransmission processing.
  • the indication device 2000 After the data is sent to the user equipment, the indication device 2000 sends feedback to the primary base station, so that the primary base station can grasp the transmission status of each secondary base station in time, thereby overcoming the problem that the retransmission timing is inflexible.
  • the indication information is further used to indicate that the device 2000 does not advance the sent data.
  • the apparatus 2000 further includes: a configuration unit 2300, configured to perform no retransmission processing on the transmitted data according to the indication information.
  • the primary base station can be used to query the user equipment for the transmission status of the plurality of devices 2000 at one time, thereby avoiding the problem that the air interface resources are wasted due to the interaction between the respective devices 2000 and the user equipment.
  • the device 2000 further includes:
  • the second receiving unit 2400 is configured to receive a notification message sent by the primary base station, where the notification message is used to instruct the device 2000 to resend the first data to the user equipment.
  • the original device 2000 When the individual data is lost, rather than the data loss caused by the link instability, the original device 2000 retransmits the data, and the interface traffic between the base station and the base station can be reduced.
  • the device 2000 further includes:
  • the third receiving unit 2500 is configured to receive second data that is not successfully transmitted by the other device 2000 sent by the primary base station;
  • the second sending unit 2600 is configured to send the second data to the user equipment.
  • the primary base station can select a suitable device 2000 for retransmission according to the data loss condition, so as to avoid the continuous use of the device 2000 with poor transmission status, resulting in reordering delay.
  • the apparatus 2000 may correspond to the first secondary base station in the methods 200 and 300 for performing the retransmission processing of the embodiment of the present application, and the foregoing and other operations of the respective modules in the apparatus 2000 and/or
  • the functions of the first secondary base station in the respective methods of FIG. 4 and FIG. 5 are respectively omitted.
  • FIG. 10 illustrates an apparatus 3000 for performing a retransmission process in accordance with an embodiment of the present application.
  • the apparatus 3000 includes:
  • the first receiving unit 3100 is configured to receive the query information that is sent by the primary base station based on the feedback information, where the feedback information is used to indicate that the first secondary base station has sent data to the user equipment, where the query information is used to query whether the user equipment correctly receives the The data sent by the first secondary base station;
  • the sending unit 3200 is configured to send response information of the inquiry information to the primary base station.
  • first secondary base station may be one or multiple, and is not limited in this application.
  • the retransmission is initiated on the secondary base station, which can make full use of the flexibility of multiple connections, thereby reducing the reordering delay.
  • the first receiving unit 3100 is specifically configured to:
  • the sending unit 3200 is specifically configured to:
  • the response information of the inquiry information is sent to the primary base station by the second secondary base station.
  • the apparatus 3000 further includes:
  • the second receiving unit 3300 is configured to receive the indication information sent by the primary base station, where the indication information is used to indicate that the apparatus 3000 sends the response information of the inquiry information to the primary base station by using the third secondary base station.
  • the device 3000 is directed by the primary base station, and the path of the response information can be indicated by the device 3000 in a dynamic or static manner, so that the response information can be transmitted on a more reliable path, making full use of the flexibility of multiple connections.
  • the apparatus 3000 may correspond to the party that performs the retransmission processing of the embodiment of the present application.
  • the user equipments of the methods 200 and 300, and the above-described and other operations and/or functions of the respective modules in the apparatus 3000 are respectively implemented in order to implement the respective processes of the user equipment in the respective methods in FIGS. 4 and 5, for the sake of brevity, no longer here. Narration.
  • the retransmission processing is performed by the PDCP entity, which improves the flexibility of retransmission link selection, and the primary base station can estimate one of the chains in time according to the transmission condition of multiple links.
  • the data caused by the deterioration of the quality of the road is lost, and the retransmission is initiated on other links to reduce the reordering delay of the PDCP entity of the user equipment.
  • the RLC entity does not use ARQ, which saves the RLC entity on multiple links.
  • the query information sent to the user equipment and the multiple RLC status reports sent by the user equipment are replaced by a response message of the PDCP entity responding to the primary base station, the purpose of the response information is to indicate whether the data is correctly received, and the PDCP entity retransmission mechanism is not Regardless of which link the data is transmitted on, the user's current receiving state is queried from a global perspective; the user equipment can respond to the inquiry information sent by the PDCP entity of the primary base station, and can select a path to send an inquiry according to the guidance of the network.
  • the response information of the information so that the response information of the inquiry information is transmitted on the link with good quality, and is fully beneficial Multi-connectivity flexibility.
  • FIG. 11 illustrates an apparatus 4000 for performing a retransmission process in accordance with an embodiment of the present application.
  • the device 4000 includes:
  • the receiving unit 4100 is configured to receive feedback information sent by the first radio link control RLC entity of the user equipment, where the feedback information is used to indicate that the first RLC entity has sent data to the primary base station;
  • the processing unit 4200 is configured to perform retransmission processing of the data according to the feedback information.
  • the RLC entity of the user equipment feeds back to the device 4000 after transmitting data to the primary base station, so that the device 4000 can timely grasp the transmission status of each RLC entity of the user equipment, thereby overcoming the problem of inflexibility of the retransmission timing.
  • first RLC entity may be one or multiple, which is not limited in this application.
  • processing unit 4200 is specifically configured to:
  • the retransmission is initiated on the RLC entity with better transmission quality, which can make full use of the flexibility of multiple connections, thereby reducing the reordering delay.
  • the determining unit 4200 is specifically configured to:
  • the device 4000 may select an appropriate RLC entity for retransmission according to the data loss condition, and avoid using the RLC entity with poor transmission status to cause the reordering delay.
  • the determining unit 4200 is specifically configured to:
  • the determining unit 4200 is specifically configured to:
  • the inquiry information is sent to the primary base station according to the feedback information and the transmission window status of the first RLC entity of the user equipment.
  • FIG. 12 illustrates an apparatus 5000 for performing a retransmission process in accordance with an embodiment of the present application.
  • the apparatus 5000 includes:
  • the first receiving unit 5100 is configured to receive the indication information sent by the primary base station, where the indication information is used to indicate that the apparatus 5000 sends the feedback information to the PDCP entity of the user equipment after sending the first data to the primary base station;
  • the first sending unit 5200 is configured to send, according to the indication information, the feedback information to the PDCP entity of the user equipment after the first data is sent to the primary base station, where the feedback information is used by the PDCP entity of the user equipment to perform the A data retransmission process.
  • the indication device 5000 feeds back to the PDCP entity of the user equipment, so that the PDCP entity of the user equipment can grasp the transmission status of each device 5000 in time, thereby overcoming the problem of inflexibility of the retransmission timing.
  • the indication information is further used to indicate that the apparatus 5000 does not perform retransmission processing on the sent data, and the apparatus 5000 further includes:
  • the configuration unit 5300 is configured to perform retransmission processing on the transmitted data according to the indication information.
  • the retransmission process is not performed on the first data by the indication device 5000, and the PDCP entity of the user equipment can be used to query the primary base station for the transmission status of the multiple devices 5000 at one time, thereby avoiding the interaction between the respective devices 5000 and the primary base station. This causes a waste of air interface resources.
  • the apparatus 5000 further includes:
  • the second receiving unit 5400 is configured to receive a notification message sent by the PDCP entity of the user equipment, where the notification message is used to instruct the device 5000 to resend the first data to the primary base station.
  • the apparatus 5000 further includes:
  • a third receiving unit 5500 configured to receive second data that is not successfully transmitted by another device 5000 sent by the PDCP entity of the user equipment;
  • the second sending unit 5600 is configured to send the second data to the primary base station.
  • the PDCP entity of the user equipment may select a suitable device 5000 for retransmission according to the data loss condition, so as to avoid continuous use of the device 5000 with poor transmission status, resulting in a large reordering delay.
  • FIG. 13 illustrates an apparatus 6000 for performing a retransmission process in accordance with an embodiment of the present application.
  • the device 6000 includes:
  • the receiving unit 6100 is configured to receive the query information sent by the PDCP entity of the user equipment, where the query information is used to query whether the device 6000 correctly receives the data sent by the first RLC entity of the user equipment;
  • the sending unit 6200 is configured to send the response information of the inquiry information to the PDCP entity of the user equipment.
  • the PDCP entity of the user equipment receives the query information sent by the PDCP entity of the user equipment based on the feedback information, and the PDCP entity of the user equipment sends the response information of the query information, so that the PDCP entity of the user equipment can detect whether each RLC entity has data loss in time, so as to have data.
  • the retransmission is initiated by using other RLC entities with better transmission quality, which can fully utilize the flexibility of multiple connections, thereby reducing the reordering delay.
  • the retransmission processing is performed by the PDCP entity,
  • the flexibility of the high-retransmission link selection the PDCP entity of the user equipment can timely estimate the data loss caused by the quality deterioration of one of the links according to the transmission condition of multiple links, and quickly initiate retransmission on other links.
  • the PDCP entity reordering delay of the primary base station is reduced.
  • the RLC entity does not use the ARQ, which saves the RLC entity from interrogating and interacting with the primary base station on multiple links, but is performed by the PDCP entity of the user equipment and the primary base station.
  • the PDCP entity retransmission mechanism does not care which link the data is transmitted on, but queries the current receiving state of the user equipment from a global perspective; the primary base station can respond to the inquiry information sent by the PDCP entity of the user equipment.
  • FIG. 14 shows a schematic block diagram of an apparatus 10 in accordance with an embodiment of the present application.
  • the apparatus 10 shown in FIG. 14 includes a memory 11, a processor 12, a transceiver 13, a communication interface 14, and a bus system 15.
  • the memory 11, the processor 12, the transceiver 13, and the communication interface 14 are connected by a bus system 15 for storing instructions for executing instructions stored in the memory 11 to control the transceiver 13 to receive The input data and information, output operation results and the like, and control the communication interface 14 to transmit signals.
  • the processor 12 is configured to send, by using the transceiver, indication information to the first secondary base station, where the indication information is used to indicate that the first secondary base station sends feedback information to the processor after sending data to the user equipment; Receiving, by the transceiver, the feedback information that is sent by the first secondary base station according to the indication information; and performing retransmission processing of the data according to the feedback information.
  • the processor 12 may be a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • communication interface 14 implements communication between device 10 and other devices or communication networks using transceivers such as, but not limited to, transceivers.
  • the memory 11 can include read only memory and random access memory and provides instructions and data to the processor 12.
  • a portion of processor 12 may also include a non-volatile random access memory.
  • processor 12 may also store information of the type of device.
  • the bus system 15 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as the bus system 15 in the figure.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processor 12 or an instruction in the form of software.
  • the method for wireless communication disclosed in the embodiments of the present application may be directly implemented as a hardware processor to perform, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 11, and the processor 12 reads the information in the memory 11 and performs the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the apparatus 10 may correspond to the primary base station in each method of performing retransmission processing of the embodiment of the present application, and may correspond to the apparatus 1000 according to the embodiment of the present application, and each of the apparatuses 1000
  • the above and other operations and/or functions of the module are respectively implemented in order to implement the respective processes of the respective methods in FIGS. 4 and 5. It is concise and will not be repeated here.
  • FIG. 15 shows a schematic block diagram of an apparatus 20 in accordance with an embodiment of the present application.
  • the apparatus 20 shown in FIG. 15 includes a memory 21, a processor 22, a transceiver 23, a communication interface 24, and a bus system 25.
  • the memory 21, the processor 22, the transceiver 23 and the communication interface 24 are connected by a bus system 25 for storing instructions for executing instructions stored by the memory 21 to control the transceiver 23 to receive.
  • the processor 22 is configured to receive the indication information sent by the primary base station by using the transceiver, where the indication information is used to indicate that the first secondary base station sends the feedback information to the primary base station after sending the first data to the user equipment. And sending, according to the indication information, the feedback information to the primary base station by using the transceiver, after the sending the first data to the user equipment, where the feedback information is used by the primary base station to perform the A data retransmission process.
  • the processor 22 may be a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • communication interface 24 enables communication between device 20 and other devices or communication networks using transceivers such as, but not limited to, transceivers.
  • the memory 21 can include read only memory and random access memory and provides instructions and data to the processor 22.
  • a portion of processor 22 may also include a non-volatile random access memory.
  • processor 22 may also store information of the type of device.
  • the bus system 25 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as the bus system 25 in the figure.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processor 22 or an instruction in the form of software.
  • the method for wireless communication disclosed in the embodiments of the present application may be directly implemented as a hardware processor to perform, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 21, and the processor 22 reads the information in the memory 21 and performs the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the apparatus 20 may correspond to the first secondary base station in each method of performing retransmission processing in the embodiment of the present application, and may correspond to the apparatus 2000 according to the embodiment of the present application, and the apparatus 2000
  • the above and other operations and/or functions of the respective modules are respectively implemented in order to implement the corresponding processes of the methods in FIG. 4 and FIG. 5, and are not described herein again for brevity.
  • FIG. 16 shows a schematic block diagram of an apparatus 30 in accordance with an embodiment of the present application.
  • the apparatus 30 shown in FIG. 16 includes a memory 31, a processor 32, a transceiver 33, a communication interface 34, and a bus system 35.
  • the memory 31, the processor 32, the transceiver 33 and the communication interface 34 are connected by a bus system 35 for storing instructions for executing instructions stored in the memory 31 for controlling the transceiver 33 to receive.
  • the input data and information, the output operation result and the like are outputted, and the communication interface 34 is controlled to transmit a signal.
  • the processor 32 is configured to receive, by using the transceiver, query information that is sent by the primary base station based on the feedback information, where the feedback information is used to indicate that the first secondary base station has sent data to the user equipment, where the query information is used to query the location Whether the user equipment correctly receives the data sent by the first secondary base station; and sends, by the transceiver, response information of the inquiry information to the primary base station.
  • the processor 32 may be a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • communication interface 34 implements communication between device 30 and other devices or communication networks using transceivers such as, but not limited to, transceivers.
  • the memory 31 can include read only memory and random access memory and provides instructions and data to the processor 32.
  • a portion of processor 32 may also include a non-volatile random access memory.
  • processor 32 may also store information of the type of device.
  • the bus system 35 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 35 in the figure.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processor 32 or an instruction in the form of software.
  • the method for wireless communication disclosed in the embodiments of the present application may be directly implemented as a hardware processor to perform, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 31, and the processor 32 reads the information in the memory 31 and performs the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the apparatus 30 according to the embodiment of the present application may correspond to the user equipment in each method of the retransmission processing of the embodiment of the present application, and may correspond to the apparatus 3000 according to the embodiment of the present application, and each of the apparatuses 3000
  • the above and other operations and/or functions of the modules are respectively implemented in order to implement the corresponding processes of the methods in FIG. 4 and FIG. 5, and are not described herein again for brevity.
  • the retransmission processing is performed by the PDCP entity, which improves the flexibility of retransmission link selection, and the primary base station can estimate one of the chains in time according to the transmission condition of multiple links.
  • the data caused by the deterioration of the quality of the road is lost, and the retransmission is initiated on other links to reduce the reordering delay of the PDCP entity of the user equipment.
  • the RLC entity does not use ARQ, which saves the RLC entity on multiple links.
  • the query information sent to the user equipment and the multiple RLC status reports sent by the user equipment are replaced by a response message of the PDCP entity responding to the primary base station, the purpose of the response information is to indicate whether the data is correctly received, and the PDCP entity retransmission mechanism is not Regardless of which link the data is transmitted on, the user's current receiving state is queried from a global perspective; the user equipment can respond to the inquiry information sent by the PDCP entity of the primary base station, and can select a path to send an inquiry according to the guidance of the network.
  • the response information of the information so that the response information of the inquiry information is transmitted on the link with good quality, and is fully beneficial Multi-connectivity flexibility.
  • FIG. 17 shows a schematic block diagram of an apparatus 40 in accordance with an embodiment of the present application.
  • the apparatus 40 shown in FIG. 17 includes a memory 41, a processor 42, a transceiver 43, a communication interface 44, and a bus system 45.
  • the memory 41, the processor 42, the transceiver 43, and the communication interface 44 are connected by a bus system 45 for storing instructions for executing instructions stored by the memory 41 to control the transceiver 43 to receive.
  • the input data and information, the output operation result and the like are outputted, and the communication interface 44 is controlled to transmit a signal.
  • the processor 42 is configured to receive the feedback information sent by the first radio link control RLC entity of the user equipment, where the feedback information is used to indicate that the first RLC entity has sent data to the primary base station; and the data is performed according to the feedback information. Retransmission processing.
  • the processor 42 can adopt a general-purpose central processing unit (Central).
  • Central central processing unit
  • CPU central processing unit
  • microprocessor microprocessor
  • ASIC application specific integrated circuit
  • communication interface 44 enables communication between device 40 and other devices or communication networks using transceivers such as, but not limited to, transceivers.
  • the memory 41 can include read only memory and random access memory and provides instructions and data to the processor 42.
  • a portion of processor 42 may also include a non-volatile random access memory.
  • processor 42 may also store information of the type of device.
  • the bus system 45 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 45 in the figure.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processor 42 or an instruction in the form of software.
  • the method for wireless communication disclosed in the embodiments of the present application may be directly implemented as a hardware processor to perform, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 41, and the processor 42 reads the information in the memory 41 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the apparatus 40 may correspond to the PDCP entity of the user equipment in each method of performing the retransmission processing of the embodiment of the present application, and may correspond to the apparatus 4000 according to the embodiment of the present application, and the apparatus 4000
  • the above and other operations and/or functions of the respective modules in order to implement the corresponding processes of the method in FIG. 7 are omitted for brevity.
  • FIG. 18 shows a schematic block diagram of an apparatus 50 in accordance with an embodiment of the present application.
  • the apparatus 50 shown in FIG. 18 includes a memory 51, a processor 52, a transceiver 53, a communication interface 54, and a bus system 55.
  • the memory 51, the processor 52, the transceiver 53 and the communication interface 54 are connected by a bus system 55 for storing instructions for executing instructions stored in the memory 51 for controlling the transceiver 53 to receive.
  • the processor 52 is configured to receive the indication information sent by the primary base station, where the indication information is used to indicate that the first RLC entity of the user equipment sends the feedback information to the PDCP entity of the user equipment after sending the first data to the primary base station; And sending the feedback information to the PDCP entity of the user equipment, where the feedback information is used by the PDCP entity of the user equipment to perform retransmission processing of the first data, according to the indication information.
  • the processor 52 may be a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • communication interface 54 implements communication between device 50 and other devices or communication networks using transceivers such as, but not limited to, transceivers.
  • the memory 51 can include read only memory and random access memory and provides instructions and data to the processor 52.
  • a portion of processor 52 may also include a non-volatile random access memory.
  • processor 52 may also store information of the type of device.
  • the bus system 55 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 55 in the figure.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processor 52 or an instruction in the form of software.
  • the method for wireless communication disclosed in the embodiments of the present application may be directly implemented as a hardware processor to perform, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 51, and the processor 52 reads the information in the memory 51 and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the apparatus 50 may correspond to the first RLC entity of the user equipment in each method of performing the retransmission processing in the embodiment of the present application, and may correspond to the apparatus 5000 according to the embodiment of the present application, and The above and other operations and/or functions of the respective modules in the device 5000 are respectively omitted in order to implement the corresponding processes of the method in FIG. 7 for brevity.
  • FIG. 19 shows a schematic block diagram of an apparatus 60 in accordance with an embodiment of the present application.
  • the apparatus 60 shown in FIG. 19 includes a memory 61, a processor 62, a transceiver 63, a communication interface 64, and a bus system 65.
  • the memory 61, the processor 62, the transceiver 63 and the communication interface 64 are connected by a bus system 65 for storing instructions for executing instructions stored in the memory 61 for controlling the transceiver 63 to receive.
  • the processor 62 is configured to receive the query information sent by the PDCP entity of the user equipment, where the query information is used to query whether the primary base station correctly receives data sent by the first RLC entity of the user equipment, and send the data to the PDCP entity of the user equipment.
  • the response information of the inquiry information is configured to receive the query information sent by the PDCP entity of the user equipment, where the query information is used to query whether the primary base station correctly receives data sent by the first RLC entity of the user equipment, and send the data to the PDCP entity of the user equipment.
  • the response information of the inquiry information is configured to receive the query information sent by the PDCP entity of the user equipment, where the query information is used to query whether the primary base station correctly receives data sent by the first RLC entity of the user equipment, and send the data to the PDCP entity of the user equipment.
  • the processor 62 may be a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • communication interface 64 implements communication between device 60 and other devices or communication networks using transceivers such as, but not limited to, transceivers.
  • the memory 61 can include read only memory and random access memory and provides instructions and data to the processor 62.
  • a portion of processor 62 may also include a non-volatile random access memory.
  • processor 62 may also store information of the type of device.
  • the bus system 65 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 65 in the figure.
  • each step of the above method may be completed by an integrated logic circuit of hardware in the processor 62 or an instruction in the form of software.
  • the method for wireless communication disclosed in the embodiments of the present application may be directly implemented as a hardware processor to perform, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 61, and the processor 62 reads the information in the memory 61 and performs the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the apparatus 60 according to the embodiment of the present application may correspond to the primary base station in each method of performing retransmission processing in the embodiment of the present application, and may correspond to the apparatus 6000 according to the embodiment of the present application, and each of the apparatuses 6000
  • the foregoing and other operations and/or functions of the modules are respectively implemented in order to implement the corresponding processes of the method in FIG. 7, and are not described herein again for brevity.
  • the retransmission processing is performed by the PDCP entity,
  • the flexibility of the high-retransmission link selection the PDCP entity of the user equipment can timely estimate the data loss caused by the quality deterioration of one of the links according to the transmission condition of multiple links, and quickly initiate retransmission on other links.
  • the PDCP entity reordering delay of the primary base station is reduced.
  • the RLC entity does not use the ARQ, which saves the RLC entity from interrogating and interacting with the primary base station on multiple links, but is performed by the PDCP entity of the user equipment and the primary base station.
  • the PDCP entity retransmission mechanism does not care which link the data is transmitted on, but queries the current receiving state of the user equipment from a global perspective; the primary base station can respond to the inquiry information sent by the PDCP entity of the user equipment.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution sequence, and the order of execution of each process should be determined by its function and internal logic, and should not be applied to the embodiment of the present application.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a USB flash drive, a mobile hard disk, and a read-only memory (Read-Only Memory, ROM, random access memory (RAM), disk or optical disk, and other media that can store program code.

Abstract

本申请实施例公开了一种进行重传处理的方法和装置。该方法包括：主基站向第一辅基站发送指示信息，该指示信息用于指示该第一辅基站在向用户设备发送数据后，向该主基站发送反馈信息；该主基站接收该第一辅基站根据该指示信息发送的该反馈信息；该主基站根据该反馈信息，进行该数据的重传处理。本申请实施例的进行重传处理的方法和装置，能够及时获取各个链路的情况，并在估计某条链路上的数据丢失时，主基站来进行重传处理，从而可以克服重传时机不灵活，导致用户设备的接收时延较大的问题。

Description

进行重传处理的方法和装置
本申请要求于2016年8月11日提交中国专利局、申请号为201610664988.0、发明名称为“进行重传处理的方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，尤其涉及进行重传处理的方法和装置。
背景技术
随着移动互联网的飞速发展，移动流量呈现爆炸式增长，为应对流量的压力，网络设备的部署愈加密集，宏基站和小基站的异构部署也愈加广泛。为了使用户设备能够同时利用宏基站和小基站的资源，在目前第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)讨论的第五代移动通信技术(5G)新空口(New Radio，NR)提出了多连接的概念，类似于双连接，利用多个基站上的无线资源，为一个用户设备提供服务。
在现有的双连接中，主基站(Master evolved Node B，MeNB)将数据分配给辅基站，辅基站通过向用户设备发送询问信息，并根据用户设备发送的该询问信息的响应信息来判断数据是否需要进行重传，在数据传输成功之后，向主基站反馈数据传输成功的信息。
现有的重传机制应用到5G NR多连接中，重传时机不灵活，在某个辅基站发送数据失败时，可能会出现由于主基站没有及时检测到辅基站传输失败，并利用其它传输质量较好的辅基站上发起重传，导致用户设备有较长的接收时延。
发明内容
有鉴于此，本申请实施例提供了一种进行重传处理的方法和装置，可以克服由于重传时机不灵活，而导致用户设备接收时延较大的问题。
第一方面，提供了一种进行重传处理的方法，该方法包括：主基站向第一辅基站发送指示信息，该指示信息用于指示该第一辅基站在向用户设备发送数据后，向该主基站发送反馈信息；该主基站接收该第一辅基站根据该指示信息发送的该反馈信息，该反馈信息用于指示该第一辅基站已向该用户设备发送该数据；该主基站根据该反馈信息，进行该数据的重传处理。
可选地，重传处理可以包括以下几个方面：当主基站根据反馈信息估计第一辅基站发送的数据传输成功时，主基站可以不对该第一辅基站发送的数据进行重传；当主基站根据反馈信息估计该第一辅基站发送的数据传输失败时，主基站则可以确定该第一辅基站发送的数据需要进行重传，从而主基站可以选择利用哪个辅基站重传该传输失败的数据。
可选地，该第一辅基站发送的数据可以是主基站分配的全部数据，也可以是部分，本申请不作限定。
通过指示辅基站，使得辅基站在向用户设备发送数据之后即向主基站进行反馈，以便于主基站能够及时掌握各个辅基站的发送情况，并在估计某条链路上的数据丢失时，主基站来进行重传处理，充分利用了多连接的灵活性，从而可以克服重传时机不灵活， 导致用户设备的重排序时延较大的问题。
结合第一方面，在第一方面的第一种可能的实现方式中，该方法还包括：该主基站根据该反馈信息，向该用户设备发送询问信息，该询问信息用于询问该用户设备是否正确接收到该第一辅基站发送的数据；该主基站接收该用户设备发送的该询问信息的响应信息；该主基站根据该反馈信息，进行重传处理，包括：该主基站根据由该反馈信息确定的该询问信息的响应信息，进行该数据的重传处理。
可选地，该第一辅基站可以是一个，也可以是多个。主基站也可以针对向用户设备询问主基站向用户设备发送的数据是否被正确接收。主基站还可以向用户设备一次询问多个基站的发送情况，其中，可以包括主基站和多个辅基站。而用户设备在询问信息的响应信息中可以给出多个基站的传输情况。
主基站基于反馈信息向用户设备发送询问信息，并根据接收到的询问信息的响应信息进行重传处理，使得主基站能够及时检测到各个辅基站是否有数据丢失，以便于有数据丢失时利用其他传输质量较好的辅基站上发起重传，可以充分利用到多连接的灵活性，从而减少了重排序时延。
结合第一方面的上述可能的实现方式，在第一方面的第二种可能的实现方式中，该指示信息还用于指示该第一辅基站对该第一辅基站发送的该数据不进行重传处理。
通过指示辅基站不作重传处理，利用主基站可以向用户设备一次询问多个辅基站的传输情况，避免了由于各个辅基站与用户设备之间的交互，从而造成空口资源浪费的问题。
结合第一方面的上述可能的实现方式，在第一方面的第三种可能的实现方式中，该主基站根据由该反馈信息确定的该询问信息的响应信息，进行该数据的重传处理，包括：该主基站根据该询问信息的响应信息，确定该用户设备未正确接收该第一辅基站发送的数据；该主基站向第二辅基站发送该数据，该第二辅基站用于向该用户设备发送该数据。
当丢失的数据较多时，主基站可以根据数据丢失的情况，选择一个合适的辅基站进行重传，避免持续使用传输状态不好的辅基站，造成重排序时延较大。
结合第一方面的上述可能的实现方式，在第一方面的第四种可能的实现方式中，该主基站根据由该反馈信息确定的该询问信息的响应信息，进行该数据的重传处理，包括：该主基站根据该询问信息的响应信息，确定该用户设备未正确接收该第一辅基站发送的数据；该主基站向该第一辅基站发送通知消息，该通知消息用于指示该第一辅基站重新向该用户设备发送该数据。
当个别数据丢失，而不是因为链路不稳定导致的数据丢失时，利用原有的辅基站重传数据，可以减少基站与基站之间的接口流量。
结合第一方面的上述可能的实现方式，在第一方面的第五种可能的实现方式中，该主基站根据该反馈信息，向该用户设备发送询问信息，包括：该主基站通过第三辅基站发送该询问信息；该主基站接收该用户设备发送的该询问信息的响应信息，包括：该主基站通过该第三辅基站接收该用户设备发送的该询问信息的响应信息。
可选地，该第三辅基站可以是第一辅基站，也可以是第二辅基站，可以是多连接场景中的任意一个辅基站。主基站也可以直接向用户设备发送询问信息，而用户设备直接向主基站发送该询问信息的响应信息。
结合第一方面的上述可能的实现方式，在第一方面的第六种可能的实现方式中，该 主基站在接收该用户设备发送的该询问信息的响应信息之前，该方法还包括：该主基站指示该用户设备通过第四辅基站向该主基站发送该询问信息的响应信息。
可选地，该第四辅基站可以是第一辅基站、可以是第二辅基站，还可以是第三辅基站，可以是多连接场景中的任意一个辅基站。主基站也可以指示用户设备直接向主基站发送询问信息的响应信息。
由主基站来指引用户设备，可以通过动态或者静态的方式指示用户设备发送响应信息的路径，可以使得响应信息能够在更可靠的路径上传输，充分利用多连接的灵活性。
结合第一方面的上述可能的实现方式，在第一方面的第七种可能的实现方式中，该主基站根据该反馈信息，向该用户设备发送询问信息，包括：该主基站根据该反馈信息以及该第一辅基站的发送窗口状况，向该用户设备发送该询问信息。
可选地，主基站可以在接收到反馈信息后，判断此时辅基站的发送窗口状况，若发送窗口未堵塞，则主基站可以不向用户设备发送询问信息，若此时发送窗口堵塞，则主基站向用户设备发送询问信息。
可选地，该指示信息可以承载于主基站向辅基站发送的添加请求消息或修改请求消息中，该反馈信息可以承载于下行数据传输状态消息中。
第二方面，提供了一种进行重传处理的方法，该方法包括：第一辅基站接收主基站发送的指示信息，该指示信息用于指示该第一辅基站在向用户设备发送第一数据后，向该主基站发送反馈信息；该第一辅基站根据该指示信息，在向该用户设备发送该第一数据后，向该主基站发送该反馈信息，该反馈信息用于该主基站进行该第一数据的重传处理。
通过指示辅基站，使得辅基站在向用户设备发送数据之后即向主基站进行反馈，使得主基站能够及时掌握各个辅基站的发送情况，从而可以克服重传时机不灵活的问题。
结合第二方面，在第二方面的第一种可能的实现方式中，该指示信息还用于指示该第一辅基站对该第一辅基站发送的该第一数据不进行重传处理，该方法还包括：该第一辅基站根据该指示信息，对该第一数据不进行重传处理。
通过指示辅基站不作重传处理，利用主基站可以向用户设备一次询问多个辅基站的传输情况，避免了由于各个辅基站与用户设备之间的交互，从而造成空口资源浪费的问题。
结合第二方面的上述可能的实现方式，在第二方面的第二种可能的实现方式中，该方法还包括：该第一辅基站接收该主基站发送的通知消息，该通知消息用于指示该第一辅基站重新向该用户设备发送该第一数据。
当个别数据丢失，而不是因为链路不稳定导致的数据丢失时，利用原有的辅基站重传数据，可以减少基站与基站之间的接口流量。
结合第二方面的上述可能的实现方式，在第二方面的第三种可能的实现方式中，该方法还包括：该第一辅基站接收主基站发送的第二辅基站未传输成功的第二数据；该第一辅基站向该用户设备发送该第二数据。
当丢失的数据较多时，主基站可以根据数据丢失的情况，选择一个合适的辅基站进行重传，避免持续使用传输状态不好的辅基站，造成重排序时延较大。
第三方面，提供了一种进行重传处理的方法，该方法包括：用户设备接收主基站基于反馈信息发送的询问信息，该反馈信息用于指示第一辅基站已向该用户设备发送数据， 该询问信息用于询问该用户设备是否正确接收该第一辅基站发送的数据；该用户设备向该主基站发送该询问信息的响应信息。
用户设备接收主基站基于反馈信息发送的询问信息，并向主基站发送该询问信息的响应信息，使得主基站能够及时检测到各个辅基站是否有数据丢失，以便于有数据丢失时采用其他传输质量较好的辅基站上发起重传，充分利用到多连接的灵活性，从而减少了重排序时延。
结合第三方面，在第三方面的第一种可能的实现方式中，该用户设备接收主基站发送的询问信息，包括：该用户设备接收该主基站通过第二辅基站发送的该询问信息；该用户设备向该主基站发送该询问信息的响应信息，包括：该用户设备通过该第二辅基站向该主基站发送该询问信息的响应信息。
结合第三方面的上述可能的实现方式，在第三方面的第二种可能的实现方式中，该用户设备在向该主基站发送该询问信息的响应信息之前，该方法还包括：该用户设备接收该主基站发送的指示信息，该指示信息用于指示该用户设备通过第三辅基站向该主基站发送该询问信息的响应信息。
由主基站来指引用户设备，可以通过动态或者静态的方式指示用户设备发送响应信息的路径，可以使得响应信息能够在更可靠的路径上传输，充分利用多连接的灵活性。
第四方面，提供了一种进行重传处理的方法，该方法包括：用户设备的分组数据汇聚协议PDCP实体接收该用户设备的第一无线链路控制RLC实体发送的反馈信息，该反馈信息用于指示该第一RLC实体已向主基站发送数据；该用户设备的PDCP实体根据该反馈信息，进行该数据的重传处理。
可选地，重传处理可以包括以下几个方面：当用户设备的PDCP实体根据反馈信息估计第一RLC实体发送的数据传输成功时，用户设备的PDCP实体可以不对该第一RLC实体发送的数据进行重传；当用户设备的PDCP实体根据反馈信息估计该第一RLC实体发送的数据传输失败时，用户设备的PDCP实体则可以确定该第一RLC实体发送的数据需要进行重传，从而用户设备的PDCP实体可以选择利用哪个RLC实体重传该传输失败的数据。
可选地，该第一RLC实体发送的数据可以是用户设备的PDCP实体分配的全部数据，也可以是部分，本申请不作限定。
用户设备的RLC实体在向主基站发送数据之后即向用户设备的PDCP实体进行反馈，使得用户设备的PDCP实体能够及时掌握用户设备各个RLC实体的发送情况，从而可以克服重传时机不灵活的问题。
结合第四方面，在第四方面的第一种可能的实现方式中，该方法还包括：该用户设备的PDCP实体根据该反馈信息，向该主基站发送询问信息，该询问信息用于询问该主基站是否正确接收到该用户设备的第一RLC实体发送的该数据；该用户设备的PDCP实体接收该主基站发送的该询问信息的响应信息；该用户设备的PDCP实体根据该反馈信息，进行重传处理，包括：该用户设备的PDCP实体根据由该反馈信息确定的该询问信息的响应信息，进行该数据的重传处理。
可选地，该第一RLC实体可以是一个，也可以是多个。用户设备的PDCP实体可以向主基站一次询问多个RLC实体的传输情况。而主基站在该询问信息的响应信息中给出多个RLC实体的传输情况。
用户设备的PDCP实体基于反馈信息向主基站发送询问信息，并根据接收到的询问信息的响应信息进行重传处理，使得用户设备的PDCP实体能够及时检测到各个RLC实体是否有数据丢失，以便于有数据丢失时采用其他传输质量较好的RLC实体上发起重传，可以充分利用到多连接的灵活性，从而减少了重排序时延。
结合第四方面的上述可能的实现方式，在第四方面的第二种可能的实现方式中，该用户设备的PDCP实体根据有该反馈信息确定的该询问信息的响应信息，进行该数据的重传处理，包括：该用户设备的PDCP实体根据该询问信息的响应信息，确定该主基站未正确接收该用户设备的第一RLC实体发送的数据；该用户设备的PDCP实体向该用户设备的第二RLC实体发送该数据，该用户设备的第二RLC实体用于向该主基站发送该数据。
当丢失的数据较多时，用户设备的PDCP实体可以根据数据丢失的情况，选择一个合适的RLC实体进行重传，避免持续使用传输状态不好的RLC实体，造成重排序时延。
结合第四方面的上述可能的实现方式，在第四方面的第三种可能的实现方式中，该用户设备的PDCP实体根据由该反馈信息确定的该询问信息的响应信息，进行重传处理，包括：该用户设备的PDCP实体根据该询问信息的响应信息，确定该主基站未正确接收该用户设备的第一RLC实体发送的数据；该用户设备的PDCP实体向该用户设备的第一RLC实体发送通知消息，该通知消息用于指示该用户设备的第一RLC实体重新向主基站发送该数据。
结合第四方面的上述可能的实现方式，在第四方面的第四种可能的实现方式中，该用户设备的PDCP实体根据该反馈信息，向该主基站发送询问信息，包括：该用户设备的PDCP实体根据该反馈信息以及该用户设备的第一RLC实体的发送窗口状况，向该主基站发送该询问信息。
可选地，用户设备的PDCP实体可以在接收到反馈信息后，判断此时第一RLC实体的发送窗口状况，若发送窗口未堵塞，则用户设备的PDCP实体可以不向主基站发送询问信息，若此时发送窗口堵塞，则用户设备的PDCP实体向主基站发送询问信息。
第五方面，提供了一种进行重传处理的方法，该方法包括：用户设备的第一RLC实体接收主基站发送的指示信息，该指示信息用于指示该用户设备的第一RLC实体在向该主基站发送第一数据后，向该用户设备的PDCP实体发送反馈信息；该用户设备的第一RLC实体根据该指示信息，在向主基站发送该第一数据后，向该用户设备的PDCP实体发送该反馈信息，该反馈信息用于该用户设备的PDCP实体进行该第一数据的重传处理。
通过指示用户设备的RLC实体在向主基站发送数据之后即向用户设备的PDCP实体进行反馈，使得用户设备的PDCP实体能够及时掌握各个RLC实体的传输情况，从而可以克服重传时机不灵活的问题。
结合第五方面，在第五方面的第一种可能的实现方式中，该指示信息还用于指示该用户设备的第一RLC实体对该第一RLC实体发送的该第一数据不进行重传处理，该方法还包括：该用户设备的第一RLC实体根据该指示信息，对该第一数据不进行重传处理。
通过指示用户设备的RLC实体不作重传处理，利用用户设备的PDCP实体可以向主基站一次询问多个RLC实体的传输情况，避免了由于各个RLC实体分别与主基站之间的交互，从而造成空口资源浪费的问题。
结合第五方面的上述可能的实现方式，在第五方面的第二种可能的实现方式中，该 方法还包括：该用户设备的第一RLC实体接收该用户设备的PDCP实体发送的通知消息，该通知消息用于指示该用户设备的第一RLC实体重新向主基站发送该第一数据。
结合第五方面的上述可能的实现方式，在第五方面的第三种可能的实现方式中，该方法还包括：该用户设备的第一RLC实体接收该用户设备的PDCP实体发送的该用户设备的第二RLC实体未传输成功的第二数据；该用户设备的第一RLC实体向该主基站发送该第二数据。
当丢失的数据较多时，用户设备的PDCP实体可以根据数据丢失的情况，选择一个合适的RLC实体进行重传，避免持续使用传输状态不好的RLC实体，造成重排序时延较大。
第六方面，提供了一种进行重传处理的方法，该方法包括：主基站接收用户设备的PDCP实体基于反馈信息发送的询问信息，该反馈信息用于指示该用户设备的第一RLC实体已向主基站发送数据，该询问信息用于询问该主基站是否正确接收该第一RLC实体发送的数据；该主基站向该用户设备的PDCP实体发送该询问信息的响应信息。
主基站接收用户设备的PDCP实体基于反馈信息发送的询问信息，并向用户设备的PDCP实体发送该询问信息的响应信息，使得用户设备的PDCP实体能够及时检测到各个RLC实体是否有数据丢失，以便于有数据丢失时采用其他传输质量较好的RLC实体上发起重传，可以充分利用到多连接的灵活性，从而减少了重排序时延。
第七方面，提供了一种进行重传处理的装置，用于执行上述第一方面或第一方面的任意可能的实现方式中的方法。具体地，该装置包括用于执行上述第一方面或第一方面的任意可能的实现方式中的方法的单元。
第八方面，提供了一种进行重传处理的装置，用于执行上述第二方面或第二方面的任意可能的实现方式中的方法。具体地，该装置包括用于执行上述第二方面或第二方面的任意可能的实现方式中的方法的单元。
第九方面，提供了一种进行重传处理的装置，用于执行上述第三方面或第三方面的任意可能的实现方式中的方法。具体地，该装置包括用于执行上述第三方面或第三方面的任意可能的实现方式中的方法的单元。
第十方面，提供了一种进行重传处理的装置，用于执行上述第四方面或第四方面的任意可能的实现方式中的方法。具体地，该装置包括用于执行上述第四方面或第四方面的任意可能的实现方式中的方法的单元。
第十一方面，提供了一种进行重传处理的装置，用于执行上述第五方面或第五方面的任意可能的实现方式中的方法。具体地，该装置包括用于执行上述第五方面或第五方面的任意可能的实现方式中的方法的单元。
第十二方面，提供了一种进行重传处理的装置，用于执行上述第六方面或第六方面的任意可能的实现方式中的方法。具体地，该装置包括用于执行上述第六方面或第六方面的任意可能的实现方式中的方法的单元。
第十三方面，提供了一种装置，该装置包括：存储器、处理器、收发器、通信接口和总线系统。其中，存储器、处理器、收发器和通信接口通过总线系统相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，当该指令被执行时，该处理器通过该通信接口执行第一方面的方法，并控制收发器接收输入的数据和信息，输出操作结果等数据。
第十四方面，提供了一种装置，该装置包括：存储器、处理器、收发器、通信接口和总线系统。其中，存储器、处理器、收发器和通信接口通过总线系统相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，当该指令被执行时，该处理器通过该通信接口执行第二方面的方法，并控制收发器接收输入的数据和信息，输出操作结果等数据。
第十五方面，提供了一种装置，该装置包括：存储器、处理器、收发器、通信接口和总线系统。其中，存储器、处理器、收发器和通信接口通过总线系统相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，当该指令被执行时，该处理器通过该通信接口执行第三方面的方法，并控制收发器接收输入的数据和信息，输出操作结果等数据。
第十六方面，提供了一种装置，该装置包括：存储器、处理器、收发器、通信接口和总线系统。其中，存储器、处理器、收发器和通信接口通过总线系统相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，当该指令被执行时，该处理器通过该通信接口执行第四方面的方法，并控制收发器接收输入的数据和信息，输出操作结果等数据。
第十七方面，提供了一种装置，该装置包括：存储器、处理器、收发器、通信接口和总线系统。其中，存储器、处理器、收发器和通信接口通过总线系统相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，当该指令被执行时，该处理器通过该通信接口执行第五方面的方法，并控制收发器接收输入的数据和信息，输出操作结果等数据。
第十八方面，提供了一种装置，该装置包括：存储器、处理器、收发器、通信接口和总线系统。其中，存储器、处理器、收发器和通信接口通过总线系统相连，该存储器用于存储指令，该处理器用于执行该存储器存储的指令，当该指令被执行时，该处理器通过该通信接口执行第六方面的方法，并控制收发器接收输入的数据和信息，输出操作结果等数据。
第十九方面，提供了一种计算机存储介质，用于储存为上述第一方面的方法所用的计算机软件指令，其包含用于执行上述第一方面方面所设计的程序。
第二十方面，提供了一种计算机存储介质，用于储存为上述第二方面的方法所用的计算机软件指令，其包含用于执行上述第二方面所设计的程序。
第二十一方面，提供了一种计算机存储介质，用于储存为上述第三方面的方法所用的计算机软件指令，其包含用于执行上述第三方面所设计的程序。
第二十二方面，提供了一种计算机存储介质，用于储存为上述第四方面的方法所用的计算机软件指令，其包含用于执行上述第四方面所设计的程序。
第二十三方面，提供了一种计算机存储介质，用于储存为上述第五方面的方法所用的计算机软件指令，其包含用于执行上述第五方面所设计的程序。
第二十四方面，提供了一种计算机存储介质，用于储存为上述第六方面的方法所用的计算机软件指令，其包含用于执行上述第六方面所设计的程序。
本申请中，基站、用户设备、PDCP实体以及RLC实体等的名字对设备或实体本身不构成限定，在实际实现中，这些设备或实体可以以其他名称出现。只要各个设备的功能和本申请类似，属于本申请权利要求及其等同技术的范围之内。
本申请的这些方面或其他方面在以下实施例的描述中会更加简明易懂。
附图说明
图1示出了本申请的一个应用场景的示意图；
图2示出了多连接场景下的一种协议栈架构的示意性框图；
图3示出了现有技术中存在的接收端重排序时延较长的问题的示意图；
图4示出了本申请实施例的进行重传处理的方法的示意性框图；
图5示出了本申请实施例的进行重传处理的方法的示意性流程图；
图6示出了指示接收端响应发送端PDCP层询问的PDCP header格式；
图7示出了本申请实施例的进行重传处理的方法的另一示意性流程图；
图8示出了本申请实施例的进行重传处理的装置的示意性框图；
图9示出了本申请实施例的进行重传处理的装置的另一示意性框图；
图10示出了本申请实施例的进行重传处理的装置的再一示意性框图；
图11示出了本申请实施例的进行重传处理的装置的再一示意性框图；
图12示出了本申请实施例的进行重传处理的装置的再一示意性框图；
图13示出了本申请实施例的进行重传处理的装置的再一示意性框图；
图14示出了本申请实施例的进行重传处理的装置的再一示意性框图；
图15示出了本申请实施例的进行重传处理的装置的再一示意性框图；
图16示出了本申请实施例的进行重传处理的装置的再一示意性框图；
图17示出了本申请实施例的进行重传处理的装置的再一示意性框图；
图18示出了本申请实施例的进行重传处理的装置的再一示意性框图；
图19示出了本申请实施例的进行重传处理的装置的再一示意性框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。
应理解，本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、LTE频分双工(Frequency Division Duplex，FDD)系统、LTE时分双工(Time Division Duplex，TDD)、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、全球互联微波接入(Worldwide Interoperability for Microwave Access，WiMAX)通信系统或未来的第五代移动通信技术(5G)系统等。
特别地，本申请实施例的技术方案可以应用于各种基于非正交多址接入技术的通信系统，例如稀疏码多址接入(Sparse Code Multiple Access，SCMA)系统、低密度签名(Low Density Signature，LDS)系统等，当然SCMA系统和LDS系统在通信领域也可以被称为其他名称；进一步地，本申请实施例的技术方案可以应用于采用非正交多址接入技术的多载波传输系统，例如采用非正交多址接入技术正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)、滤波器组多载波(Filter Bank Multi-Carrier，FBMC)、 通用频分复用(Generalized Frequency Division Multiplexing，GFDM)、滤波正交频分复用(Filtered-OFDM，F-OFDM)系统等。
还应理解，在本申请实施例中，终端设备可以称之为用户设备(User Equipment，UE)、终端设备、移动台(Mobile Station，MS)、移动终端(Mobile Terminal，MT)或未来5G网络中的终端设备等，该终端设备可以经无线接入网(Radio Access Network，RAN)与一个或多个核心网进行通信，例如，终端可以是移动电话(或称为“蜂窝”电话)或具有移动终端的计算机等，例如，终端还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语音和/或数据。
网络设备可以是全球移动通讯(Global System of Mobile communication，GSM)或码分多址(Code Division Multiple Access，CDMA)中的基站(Base Transceiver Station，BTS)，也可以是宽带码分多址(Wideband Code Division Multiple Access，WCDMA)中的基站(NodeB，NB)，还可以是LTE中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者中继站或接入点，或者车载设备、可穿戴设备以及未来5G网络中的接入网设备。
图1示出了本申请的一个应用场景的示意图，终端设备130周围网络设备包括主网络设备110和至少一个辅网络设备120。该至少一个辅网络设备120分别与主网络设备110相连，构成多连接，并分别与终端设备130连接为其提供服务。该主网络设备110可以为LTE网络，该辅网络设备120可以为NR网络。或者该主网络设备110可以为NR网络，该辅网络设备120可以为LTE网络。或者该主网络设备110和该辅网络设备120都为NR网络。本申请对技术方案的应用场景不作限定。终端设备130可以通过主网络设备110和辅网络设备120同时建立连接。终端设备130和主网络设备110建立的连接为主连接，终端设备130与辅网络设备120建立的连接为辅连接。终端设备130的控制信令可以通过主连接进行传输，而终端设备的数据可以通过主连接和辅连接同时传输，也可以只通过辅连接进行传输。在本申请实施例中主网络设备110可以选择满足预设条件的辅网络设备120传输终端设备130的数据，从而能够进一步减轻主网络设备110的负荷。例如，该预设条件可以为辅网络设备120与终端设备130之间的链路质量满足数据传输条件。
在本申请实施例中，辅网络设备120可以根据业务需求和用户密度灵活部署。其作用可以是辅助主网络设备110分担数据。辅网络设备120的部署可以不连续，相邻辅小区间也可有较大面积重叠，本申请实施例对此不作限定。
承载是无线接入网(Radio Access Network，RAN)侧对用户业务的容量、时延、比特率进行控制的基本单位。一个用户可以使用多个承载开展不同的业务。
在本申请实施例中，主基站例如可以是宏基站(Macrocell)，辅基站例如可以为微蜂窝基站(Microcell)、微微蜂窝基站(Picocell)、毫微微蜂窝基站(Femtocell)，但本申请实施例不限于此。
更具体地，该主基站可以为LTE基站，该辅基站为NR基站，该主基站和该辅基站也可以都为NR基站。应理解，本申请实施例并不限于此，该主基站还可以为GSM网络设备，CDMA网络设备等，该辅基站也可以为GSM网络设备，CDMA网络设备等，本申请实施例对此不作限制。
为了便于理解，先结合图2和图3简单介绍重传机制以及重传机制应用在多连接场 景中可能出现的一些问题，下面以发送下行数据为例进行说明。
在目前3GPP讨论的5G NR中，NR协议栈以LTE协议栈为基础，进行协议功能的组合和优化，若NR仍采用LTE的协议层次(分组数据汇聚协议(Packet Data Convergence Protocol，PDCP)/无线链路控制(Radio Link Control，RLC)/媒体访问控制(Medium Access Control，MAC))，则多连接的协议栈架构如图2所示。主基站PDCP实体将下行数据分成多份，分别发送给主基站的RLC实体和/或多个辅基站的RLC实体，接收到下行数据的各RLC实体将下行数据发送给用户设备，并且各RLC实体通过下行数据传输状态过程向主基站的PDCP实体反馈若干信息。该若干信息可以包括以下至少一种：收到用户设备确认的最高PDCP序号、无线接入承载(E-UTRAN Radio Access Bearer,E-RAB)、指示主基站的PDCP实体可以继续发送到RLC实体的数据量、基站与基站之间接口的丢包情况等。若有上行数据，还可以与下行数据传输状态一同发给主基站的PDCP实体。
在使用多连接的场景下，数据分别在不同的链路上传输，PDCP层是数据汇聚层，能够充分利用主基站(Master evolved Node B，MeNB)和辅基站(Secondary evolved Node B，SeNB)的无线资源，提高用户设备(User Equipment，UE)能够获得的带宽。
以某种协议栈架构为例，重传动作可能发生在以下三个层次。
(1)发生在MeNB/SeNB MAC层的混合自动重传请求(Hybrid Automatic Repeat Request，HARQ)
最底层的重传为MAC层的HARQ，快速的恢复数据，HARQ发生在每个MAC实体。
(2)发生在MeNB/SeNB RLC层的自动重传请求(Automatic Repeat Request，ARQ)
双连接场景下，要求配置使用RLC确认模式，当MAC层HARQ不能够检错出传输错误时，由RLC层的ARQ来处理，每个RLC层都有一个RLC实体。网络侧的RLC实体在满足一定的条件下，向用户设备侧的RLC实体询问用户设备侧的RLC实体是否正确接收到数据，用户设备侧的RLC实体向网络侧的RLC实体发送响应信息，指示数据的正确接收和失败接收情况。如图2所示，当网络侧有下行数据传输时，核心网设备将需要传输的下行数据发送给主基站，主基站的PDCP实体可以将其中9个PDCP协议数据单元(Protocol Data Unit，PDU)分配给辅基站1、辅基站2以及主基站，使得辅基站1、辅基站2和主基站分别向用户设备传输。可以如图2所示的将序列号为1至3的PDCP PDU分配给主基站的RLC实体，将序列号为4至6的PDCP PDU分配给辅基站1的RLC实体，将序列号7至9的PDCP PDU分配给辅基站2的RLC实体。当网络侧的各个RLC实体向用户设备的各个RLC实体发完数据之后，网络侧的各个RLC实体分别向用户设备的RLC实体询问是否正确接收相应的数据，用户设备的各个RLC实体分别根据接收到的询问响应相应网络侧的RLC实体。
(3)发生在MeNB/SeNB PDCP层的数据恢复
在一些场景下，底层协议栈由于发生重建等原因，无法进行数据的确认和重传，则由PDCP实体，执行数据恢复的动作。在单连接场景下，为了实现无损切换，PDCP实体在切换之后，重传未得到RLC实体确认成功传输的PDCP PDU，这类重传动作在双连接场景下同样支持。在双连接场景下，新增一个PDCP实体的动作——数据恢复，当辅小区组(Secondary cell group，SCG)释放/改变后，用户设备重传未得到重建的RLC实体确认的数据，并且发送直接告知主基站的PDCP实体各个RLC实体的传输情况，主基站的PDCP实体重传因通路切换丢失的数据。
尽管在多连接场景下可以使用上述的重传机制，但是随着通信系统的不断向前演进，5G NR具有一些与LTE不同的特性，例如5G NR可能较为普遍地使用高频，高频信号容易受到障碍物的影响，可能出现链路质量突然变差等不稳定的现象。因此直接将上述的重传机制应用到5G NR多连接中可能产生如下问题。
1、接收端的重排序时延
由于发送端的PDCP实体对应着多个RLC实体，RLC实体的特点是自身具有重传和重排序功能，但是来自不同链路上的RLC实体的数据可能乱序，因此接收端需使用重排序功能。以图3为例进行说明，UE的PDCP实体分别接收来自MeNB、SeNB1、SeNB2三个RLC实体的数据，如果在某一时刻t1，SeNB2上链路的质量突然变差，该链路上RLC实体经过多次重传数据后才得到确认，甚至始终没有得到确认，达到了RLC最大的重传次数，最后在t2时刻发生了SCG释放，则接收端执行PDCP数据恢复的过程发送PDCP状态报告，MeNB的PDCP实体在此时根据PDCP状态报告重新传输没有被正确接收的数据。然而，除了SeNB2上的链路发生了问题之外，其它链路均在正常工作，SeNB2的多次重传、以及数据恢复，可能影响到其它链路上正确传输的数据不能及时地提交给上层，重排序过程直到t3时刻完成，造成较长的重排序时延，对有实时性要求的应用来说，将产生严重的影响。
2、各条链路上RLC状态报告的冗余
RLC层的重传依赖询问和状态报告反馈，发送方在一定的条件下发送询问请求，接收方响应询问请求，反馈RLC状态报告。发送询问的条件包括：已发送的PDU数量大于某一预设定的阈值、发送的字节数量大于某一预设定的阈值、传输缓冲和重传缓冲均为空、没有新的数据可以传输等。
由此可见，无论是否有数据丢失、是否需要重传，RLC实体都会产生询问和RLC状态报告，而对于多连接来说，每条链路上具有各自的RLC实体，因此分别在多个链路上产生询问和RLC状态报告，属于一种较为冗余的方式。如图2所示，PDCP层将数据分为几部分，分别在MeNB和多个SeNB上传输，为了确认一段数据，有可能是全部正确接收的数据，却需要在多条链路上，产生多个RLC询问和状态报告的数据包，浪费空口资源，可以考虑采用更高层次的询问和重传，即PDCP实体进行询问和重传，节省各个链路上的状态报告。
基于上述重传机制在多连接场景下的应用可能的出现的问题，本申请提出了一种新的重传机制，主要应用于未来5G网络，NR多连接的场景，但本申请并不限于此。如图1所示，主网络设备与辅网络设备可以分别为NR系统中覆盖范围较大的宏基站以及补充覆盖的小基站，UE处于多个基站覆盖的重叠区域，可以使用多个基站的资源，为描述方便，本申请以NR多连接为例，但本申请不限于此。例如，宏基站和小基站可以是LTE基站等。
应理解，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
下面将结合图4至图7分别描述本申请实施例提供的进行重传处理的各种方法。先描述对下行数据进行重传处理的方法。
图4示出了本申请实施例提供的进行重传处理的方法200的示意性框图。其中，图4的方法200可应用于上文图1所示的多连接场景中。其中，方法200中的主基站为上文所述的主网络设备，辅基站为上文所述的辅网络设备，用户设备为上文所述的终端设备。如图4所示，该方法200包括：
S210，主基站向第一辅基站发送指示信息。该指示信息用于指示该第一辅基站在向用户设备发送数据后，向该主基站发送反馈信息。第一辅基站接收主基站发送的反馈信息。
S220，第一辅基站根据主基站发送的指示信息，在向用户设备发送数据之后，向主基站发送反馈信息。主基站接收第一辅基站发送的反馈信息。
S230，该主基站根据接收的反馈信息，向用户设备发送询问信息，主基站向用户设备询问用户设备是否正确接收该第一辅基站发送的数据。用户设备接收主基站发送的询问信息。
S240，用户设备向主基站发送该询问信息的响应信息。主基站接收该用户设备发送的询问信息的响应信息。
S250，主基站根据用户设备发送的该询问信息的响应信息，进行该数据的重传处理。
可选地，重传处理可以包括以下几个方面：当主基站根据反馈信息估计第一辅基站发送的数据传输成功时，主基站可以不对该第一辅基站发送的数据进行重传；当主基站根据反馈信息估计该第一辅基站发送的数据传输失败时，主基站则可以确定该第一辅基站发送的数据需要进行重传，从而主基站可以选择利用哪个辅基站重传该传输失败的数据。
应理解，上述第一辅基站可以是一个，也可以是多个，本申请对此不作限定。
可选地，该第一辅基站发送的数据可以是主基站分配的全部数据，也可以是部分，本申请不作限定。
为了充分利用多连接的灵活性，并使得主基站能够及时掌握各条链路的传输情况，利用主基站的PDCP实体来进行重传处理，并在每条链路上的RLC实体发送数据之后即向主基站的PDCP实体反馈，使得主基站的PDCP实体能够充分利用多链路的灵活性，选择更可靠的链路进行重传，避免持续使用质量较差的链路造成用户设备接收数据的重排序时延较大。
下面将结合图5中的流程详细描述根据本申请实施例的进行重传处理的方法300。具体如下：
S301，首先根据无线资源控制(Radio Resource Control，RRC)协议配置主基站上的PDCP层使用ARQ。
S302，主基站可以向辅基站1和/或辅基站2发送指示信息。辅基站1和/或辅基站2接收该指示信息。
S303，辅基站1和/或辅基站2根据主基站发送的指示信息，在向用户设备发送数据之后，向主基站发送反馈信息。同样地，主基站接收辅基站1和/或辅基站2发送的反馈信息。
S304，主基站根据辅基站1和/或辅基站2发送的反馈信息，向用户设备发送询问信息，该询问信息用于向用户设备询问是否正确接收辅基站1和/或辅基站2发送的数据。同样地，用户设备接收主基站发送的询问信息。
S305，主基站可以向用户设备发送指示发送响应询问信息的路径，用户设备可以接收该指示发送响应询问信息路径的信息。
S306，用户设备可以向主基站发送该询问信息的响应信息，主基站接收该响应信息。
S307，主基站在接收到用户设备发送的响应信息后，发现辅基站1发送的数据没有被用户设备正确接收，需要重传。可以通过步骤S308和步骤S309中的方案重新传输丢失的数据。
S308，若丢失的数据较多，意味着传输丢失数据的辅基站1可能出现了链路故障，不再适合做重传，此时，主基站可以将重传数据作为新的数据发送给辅基站2，由辅基站2传输。辅基站2接收到主基站发送的辅基站1丢失的数据，并且向用户设备传输该辅基站1丢失的数据。
S309，主基站通知辅基站1重新传输缓存里的数据。辅基站1在接收到该通知消息之后，再次向用户设备发送丢失的数据。
具体地，根据RRC协议配置主基站的PDCP实体是否使用ARQ，可以是在主基站的PDCP实体增加一个参数ARQ_Enableflag，当该值置为1时，PDCP实体使用ARQ。当该值置为0的时候，PDCP实体与传统的LTE PDCP实体一致，不采用ARQ。也可以指示主基站的RLC实体向用户设备发送数据之后，就向主基站的PDCP实体发送反馈信息。应理解，在本申请实施例中，主基站的PDCP实体可以根据数据量的大小，将要发送的下行数据分配给至少一个链路，这里的一个链路对应一个RLC发送实体，可以为主基站的RLC实体，也可以为辅基站的RLC实体。
辅基站1和/或辅基站2还可以接收主基站发送的指示信息，实现对协议栈的配置。例如，可以配置辅基站1和辅基站2每发送完主基站分配的数据后，可以是部分数据，也可以是全部数据。还可以配置辅基站1和/或辅基站2每发送完n个PDCP PDU向主基站反馈一次。即配置辅基站1和/或辅基站2在一定条件下触发反馈，通过基站与基站之间接口的数据平面向主基站告知数据发送情况，以便于主基站判断询问和重传时机。可选地，询问可以是轮询。还可以配置主基站的RLC实体在数据发送完毕之后，也向主基站的PDCP实体反馈。举例来说，指示信息中指示辅基站1和/或辅基站2在发送主基站分配数据的50％的数据之后，就向主基站发送反馈信息。指示信息还可以指示辅基站1和/或辅基站2在发送一个PDU之后，就向主基站发送反馈信息。该反馈信息可以是辅基站1或辅基站2此时数据发送完毕的序列号。主基站可以同时接收辅基站1和辅基站2发送的反馈信息，也可以依次接收辅基站1和辅基站2发送的反馈信息，对于接收顺序不限定。
应理解，主基站向辅基站1和/或辅基站2发送的指示信息可以承载在添加请求消息/修改请求消息中，实现对无线数据承载(data radio bearer，DRB)的新建和重配，该指示信息还可以承载在其他现有消息中，本申请对指示信息承载的消息不作任何限制，只要是主基站能向辅基站发送的消息中都可以承载该指示信息，利用现有的消息承载该指示信息，不需要增加新的资源即可实现主基站对辅基站的重配置，以避免造成不必要的资源浪费。另外，辅基站1和/或辅基站2向主基站发送的反馈信息也可以承载在现有消息中，例如下行数据传输状态中携带。
可选地，作为本申请的一个实施例，该指示信息还用于指示辅基站1和/或辅基站2不进行重传处理，换句话说，该指示信息还用于指示辅基站1和/或辅基站2不使用ARQ。
通过配置辅基站不进行重传处理，并利用主基站可以向用户设备一次询问多个辅基站的传输情况，避免了由于各个辅基站与用户设备之间的交互，从而造成空口资源浪费的问题。
本申请实施例还可以通过核心网设备或者其他网络设备对辅基站进行配置，本申请对此不够成限定。
需要说明的是，这里的接收和发送反馈信息可以是主基站和辅基站之间的直接动作，也可以说这个反馈信息是由辅基站产生的，但是以一定的方式从辅基站传输给主基站的，主基站再接收该反馈信息，并利用这个反馈信息。换句话说，本申请实施例提到的接收和发送反馈信息并不限于是直接接收和发送。
可选地，主基站可以根据反馈信息直接进行重传处理，例如，主基站可以设定一个时间窗，若在时间窗内主基站未收到第一辅基站的反馈信息，或时间窗外收到该反馈信息，主基站可以估计传输该数据的链路比较拥塞，那么主基站可以指示其他辅基站重传该第一辅基站发送的这部分数据。
可选地，在本申请实施例中，主基站可以根据反馈信息，向用户设备发送询问信息，可以同时向用户设备询问是否正确接收辅基站1和辅基站2发送的数据，主基站还可以在先接到辅基站1或辅基站2发送的反馈信息之后，直接向用户设备询问用户设备是否正确接收辅基站1或辅基站2发送的数据。在通常情况下，用户设备是不响应主基站的PDCP询问的。本申请实施例可以通过在使用18位序列号的PDCP头部中设置一个询问位，来指示主基站是否需要用户设备响应该询问信息。若该位置为1则意味着需要用户设备响应该询问信息。也可以在PDCP头部添加其他指示用户设备响应该询问信息的指示信息。图6是一种PDCP PDU的格式，其中D/C用于标识为控制PDU或数据PDU，P位可以是第一个字节中的某一比特位，R为保留位，PDCP SN是发送的PDCP数据的序列号，DATA表示未压缩PDCP输入数据/压缩PDCP输入数据，若P位为1则意味着需要用户设备反馈PDCP状态报告。也可以在PDCP头部添加其他指示用户设备响应该询问信息的指示信息。例如，可以通过将其他格式中的R位设定为P位来实现用户设备对主基站的PDCP询问的响应。
可选地，主基站也可以向用户设备询问主基站向用户设备发送的数据是否被正确接收。在一个实施例中，主基站向用户设备一次询问多个基站的发送情况。而用户设备可以在响应信息中给出多个基站的发送情况。
可选地，在本申请的一个实施例中，主基站可以在RRC连接重配置消息的PDCP配置信息内容中增加一个新的信元。若该信元为1，则指示主基站为用户设备配置了静态的询问信息反馈路径给主基站。具体地，该主基站可以指示该用户设备通过辅基站1向主基站发送该询问信息的响应信息。换句话说，只要主基站不再重新指示用户设备，那么用户设备默认通过辅基站1向主基站发送该询问信息的响应信息。若新增的信元配置为0，则没有给用户设备配置默认的响应信息反馈路径，则用户设备在每次收到主基站发送的询问信息的路径上发送该询问信息的响应信息。这样的话，主基站可以选择一条较为稳定的链路，向用户设备发起询问，通过这样的方式，可以指引用户设备在较为稳定的链路发送该询问信息的响应信息，以免出现该询问信息的响应信息出现丢失等问题。举例来说，若主基站判断出来辅基站1比较稳定，那么主基站可以通过辅基站1向用户设备发送询问信息，这样的话，用户设备也可以通过辅基站1向主基站发送该询问信息的 响应信息。
应理解，该询问信息的响应信息可以是多个辅基站的传输状况，例如，辅基站1和辅基站2的传输状况，主基站可以了解到辅基站1和辅基站2的传输情况，从而可以确定需不需要重新发送数据。主基站接收的该询问信息的响应信息还可以包括主基站的传输情况。
可选地，在本申请实施例中，当主基站确定该辅基站1传输的数据丢失后，主基站将丢失的数据发送给辅基站2，指示辅基站2重新向用户设备发送。辅基站2在接收到主基站发送的辅基站1丢失的数据后，将其作为新的数据向用户设备发送。这种重传方式适合于原来传输数据的辅基站质量变得较差的情况下。当主基站判断辅基站1上的数据可能有丢失的情况下，主基站通知辅基站1重新传输缓存里的数据。辅基站1在接收到该通知消息之后，再次向用户设备发送丢失的数据。这种方法适用于个别的数据丢失，而不是因为链路不稳定、甚至时效导致的数据丢失。
在本申请实施例中，各个辅基站在发送数据后，可以不向主基站发送反馈信息，即不提供辅助信息，可以全部由主基站决定何时向用户设备发送询问信息，并在接收到用户设备发送的询问信息的响应信息确定是否需要重传数据。本申请实施例还可以通过其他的方式反馈链路状态的信息，例如，辅基站可以通知主基站该链路目前状态不好，可以通过一个参数来通知主基站，主基站在接收到反馈链路质量不好的信息之后，可以尝试对该链路上的数据放于其他链路做重传。具体地，辅基站不考虑当前的发送情况，而是可以通过能够充分了解当前链路质量的机制，判断其链路状态，例如设定参数SeNB_link_degradation，当链路状态不好时，将该参数设置为1，并将该参数反馈给主基站，主基站从某一辅基站收到该参数时，说明该辅基站上的数据丢失的可能性比较大，则主基站可以将原来分配给该辅基站发送的数据，分配给其他的辅基站重新发送。当链路状态不好时，也可以设定参数SeNB_link_degradation为0。本申请对指示链路质量不好的参数设定值不作限定。
可选地，在本申请实施例中，该主基站根据该反馈信息，向该用户设备发送询问信息，包括：该主基站根据该反馈信息以及该第一辅基站的发送窗口状况，向该用户设备发送该询问信息。
具体地，主基站接收到反馈信息，可以判断此时辅基站的发送窗口状况，若发送窗口不堵塞，则主基站可以不向用户设备发送询问信息，若此时发送窗口堵塞，则主基站可以向用户设备发送询问信息。主基站还可以采用滑动窗口机制，维持一个发送窗口，无论多个辅基站是否将数据发送完毕，都只根据发送窗口的情况向用户设备询问，例如：发送窗口无法向后滑动，或者数据发送达到了窗口大小的一半等。或者当辅基站的发送缓存为空时，向用户设备反馈一个指示信息，不需要主基站向用户设备发送询问信息，用户设备即可将该询问信息的响应信息发送给主基站。主基站还可以通过其他触发条件向用户设备发送询问信息，本申请对此不够成限定。
应理解，图5示出了进行重传处理的方法的详细的步骤或操作，但这些步骤或操作仅是示例，本申请实施例还可以执行其他操作，或者图5中各操作的变形。此外，图5中的各个步骤可以按照与图5呈现的不同顺序来执行，并且有可能并非要执行图5中的全部操作。
还应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺 序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
因此，本申请实施例提供的进行重传处理的方法，重传处理由主基站的PDCP实体执行，提高重传链路选择的灵活性，主基站的PDCP实体可根据多个链路的发送情况，及时估计其中一条链路因质量变差而导致的数据丢失，并快速在其它链路发起重传，降低用户设备的PDCP实体重排序时延。另外，RLC实体不采用ARQ，节省了RLC实体在多条链路上向用户设备发送的询问信息以及用户设备发送的多条RLC状态报告，而是由一条响应主基站的PDCP实体的响应信息取代，响应信息的目的是指示数据是否正确接收，PDCP实体重传机制不关心数据在哪条链路上传输，而是从全局的角度询问用户设备当前的接收状态。用户设备能够响应主基站的PDCP实体发送的询问信息，并且能够根据网络的指引，选择一条路径发送询问信息的响应信息，使得该询问信息的响应信息在质量较好的链路上传输，充分利用多连接的灵活性。
上述以由网络侧向用户设备侧发送下行数据为例对本申请实施例的进行重传处理的方法进行了详细描述，下面将以用户设备侧向网络侧发送上行数据为例对本申请实施例的进行重传处理的方法进行说明。
下面将结合图7中的流程详细描述根据本申请实施例的进行重传处理的方法500。具体如下：
S501，用户设备的PDCP实体接收主基站发送的第一指示信息，指示用户设备的PDCP层使用ARQ功能。用户设备的PDCP实体接收到该第一指示信息，对用户设备的PDCP实体进行配置。
S502，用户设备的RLC1和/或RLC2分别接收主基站发送的第二指示信息，指示用户设备的RLC1和/或RLC2在向网络侧发送数据之后，向用户设备的PDCP实体发送反馈信息。
S503，用户设备的RLC1和/或RLC2分别向辅基站1和/或辅基站2发送上行数据1和上行数据2。辅基站1和/或辅基站2分别接收用户设备的RLC1和/或RLC2发送的上行数据1和上行数据2。
S504，辅基站1和/或辅基站2分别将接收到的上行数据1和上行数据2发送给主基站。主基站通过基站与基站之间的接口分别接收该上行数据1和该上行数据2。
S505，用户设备的RLC1和/或RLC2在向网络侧发送上行数据1和上行数据2之后，向用户设备的PDCP实体发送反馈信息。同样地，用户设备的PDCP实体接收RLC1和/或RLC2发送的反馈信息。
S506，用户设备的PDCP层根据用户设备的RLC1和/或用户设备的RLC2发送的反馈信息，向主基站发送询问信息，同样地，主基站接收用户设备的PDCP层发送的询问信息。
S507，主基站可以向用户设备的PDCP层发送该询问信息的响应信息，主基站接收该响应信息。
S508，用户设备的PDCP层在接收到主基站发送的响应信息后，确定RLC1发送的数据没有被主基站正确接收，需要重传。可以通过步骤S509和步骤S510中的方案重新传输丢失的数据。
S509，若丢失的数据较多，意味着传输丢失数据的RLC1可能出现了链路故障，不 再适合做重传，此时，用户设备的PDCP实体可以将重传数据作为新的数据发送给RLC2，由RLC2传输。
S510，用户设备的PDCP实体通知RLC1重新传输缓存里的数据。RLC1在接收到该通知消息之后，在此向主基站发送丢失的数据。
应理解，上述第一RLC实体可以是一个，也可以是多个，本申请对此不作限定。
可选地，该用户设备的第一RLC实体发送的数据可以是用户设备的PDCP实体分配的全部数据，也可以是部分，本申请不作限定。
可选地，该第一指示信息可以是配置信息，即主基站配置用户设备的PDCP实体使用ARQ，具体地，可以通过将需要改变的参数告诉用户设备，用户设备根据主基站的指示对PDCP实体改变模式。配置用户设备的PDCP实体使用ARQ的具体流程同上述方法300中配置主基站的PDCP实体使用ARQ的流程是类似，为了简洁，在此不再赘述。
用户设备的RLC1和/或RLC2在接收到该第二指示信息之后，对用户设备的RLC1和/或RLC2进行配置。具体地，可以配置RLC1和/或RLC2每发送完用户设备的PDCP层分配的数据后，可以是部分数据，也可以是全部数据。还可以配置RLC1和/或RLC2每发送完n个PDCP PDU向用户设备的PDCP实体反馈一次。即配置RLC1和RLC2在一定条件下触发反馈，向用户设备的PDCP实体告知数据发送情况，以便于用户设备的PDCP实体判断询问和重传时机。
可选地，在本申请的一个实施例中，主基站向用户设备发送的指示信息可以承载在RRC连接重配置消息中，实现对无线数据承载(data radio bearer，DRB)的新建和重配，该指示信息还可以承载在其他现有消息中，本申请对指示信息承载的消息不作任何限制，只要是主基站能向用户设备发送的消息中都可以承载该指示信息，利用现有的消息承载该指示信息，不需要增加新的资源即可实现主基站对辅基站的重配置，以避免造成不必要的资源浪费。
可选地，作为本申请的一个实施例，该指示信息还用于指示RLC1和RLC2不使用ARQ功能。通过配置用户设备的RLC实体不使用ARQ功能，利用用户设备的PDCP实体可以向主基站一次询问多个RLC实体的传输情况，避免了由于各个RLC实体与主基站之间的交互，从而造成空口资源浪费的问题。
本申请实施例还可以通过核心网设备或者其他网络设备对用户设备进行配置，本申请对此不够成限定。
本领域技术人员理解，在多连接场景中，如图2所示，每条链路上有一个发送端的RLC实体和一个接收端的RLC实体，即在发送上行数据时，用户设备的RLC实体将数据是直接发送给网络侧的各个RLC实体，可以是主基站的RLC实体，也可以是辅基站的RLC实体，为了便于描述，这里将用户设备的RLC1与辅基站1对应，用户设备的RLC2与辅基站2对应。
需要说明的是，这里的接收和发送反馈信息可以是用户设备的PDCP实体和用户设备的RLC实体之间的直接动作，也可以说这个反馈信息是由用户设备的RLC实体产生的，但是以一定的方式从RLC实体传输给PDCP实体的，PDCP实体再接收该反馈信息，并利用这个反馈信息。换句话说，本申请实施例提到的接收和发送反馈信息并不限于是直接接收和发送。
可选地，在本申请实施例中，用户设备的PDCP实体可以根据反馈信息，向主基站 发送询问信息，用户设备的PDCP实体可以在接到用户设备的RLC1和/或用户设备的RLC2发送的反馈信息之后，直接向用户设备询问主基站是否正确接收用户设备的RLC1和/或用户设备的RLC2发送的数据。主基站可以向用户设备的PDCP实体发送该询问信息的响应信息。该响应信息可以是多个用户设备的RLC实体的传输状况，例如，RLC1和RLC2的传输状况，用户设备的PDCP实体可以了解到RLC1和RLC2的传输情况，从而可以确定需不需要重新发送数据。
应理解，发送上行数据时，用户设备的PDCP实体向主基站询问的过程，与发送下行数据时，主基站的PDCP实体向用户设备进行询问的过程类似，详细流程在此不再赘述，可参考上述方法300的步骤S304和步骤S305。
可选地，作为一个实施例，当主基站确定RLC1传输的数据丢失后，用户设备的PDCP实体将丢失的数据发送给RLC2，指示RLC2重新向主基站发送。RLC2在接收到用户设备的PDCP实体发送的RLC1丢失的数据后，将其作为新的数据向主基站发送。这种重传方式适合于原来传输数据的RLC质量变得较差的情况下。作为另一个实施例，当用户设备的PDCP实体判断RLC1上的数据可能有丢失的情况下，用户设备的PDCP实体通知RLC1重新传输缓存里的数据。RLC1在接收到该通知消息之后，再次向主基站发送丢失的数据。这种方法适用于个别的数据丢失，而不是因为链路不稳定、甚至时效导致的数据丢失。
在本申请实施例中，各个RLC实体在发送数据后，可以不向用户设备的PDCP实体发送反馈信息，即不提供辅助信息，可以全部由用户设备的PDCP实体决定何时向主基站发送询问信息，并在接收到主基站发送的询问信息的响应信息确定是否需要重传数据。本申请实施例还可以通过其他的方式反馈链路状态的信息，例如，RLC实体可以通知用户设备的PDCP实体该链路目前状态不好，可以通过一个参数来通知主基站，用户设备的PDCP实体在接收到反馈链路质量不好的信息之后，可以尝试对该链路上的数据放于其他链路做重传。
可选地，在本申请实施例中，该用户设备的PDCP实体根据该反馈信息，向该主基站发送询问信息，包括：该用户设备的PDCP实体根据该反馈信息以及该第一RLC实体的发送窗口状况，向该主基站发送该询问信息。
具体地，用户设备的PDCP实体接收到反馈信息，可以判断此时用户设备的RLC实体的发送窗口状况，若发送窗口未堵塞，则用户设备的PDCP实体可以不向主基站发送询问信息，若此时发送窗口堵塞，则用户设备的PDCP实体可以向主基站发送询问信息。用户设备的PDCP实体还可以采用滑动窗口机制，维持一个发送窗口，无论多个RLC实体是否将数据发送完毕，都只根据发送窗口的情况向主基站进行询问，例如：发送窗口无法向后滑动，或者数据发送达到了窗口大小的一半等。或者当RLC的发送缓存为空时，向主基站反馈一个指示信息，不需要用户设备的PDCP实体向主基站发送询问信息，主基站即可将该询问信息的响应信息发送给用户设备的PDCP实体。用户设备的PDCP实体还可以通过其他触发条件向主基站发送询问信息，本申请对此不够成限定。
应理解，图7示出了进行重传处理的方法的详细的步骤或操作，但这些步骤或操作仅是示例，本申请实施例还可以执行其他操作，或者图7中各操作的变形。此外，图7中的各个步骤可以按照与图7呈现的不同顺序来执行，并且有可能并非要执行图7中的全部操作。
还应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
需要说明的是，对下行数据的重传处理的方法适用于对上行数据的重传处理，为了简洁，可具体参考对下行数据的重传处理的实施例，在此不再赘述。
因此，本申请实施例提供的进行重传处理的方法，重传处理由PDCP实体执行，提高重传链路选择的灵活性，用户设备的PDCP实体可根据多个链路的发送情况，及时估计其中一条链路因质量变差而导致的数据丢失，并快速在其它链路发起重传，降低主基站的PDCP实体重排序时延；另外，RLC实体不采用ARQ，节省了RLC实体在多条链路上的与主基站进行询问交互，而是由用户设备的PDCP实体与主基站进行询问交互取代，PDCP实体重传机制不关心数据在哪条链路上传输，而是从全局的角度询问用户设备当前的接收状态；主基站能够响应用户设备的PDCP实体发送的询问信息。
上文中结合图4至图7，详细描述了根据本申请实施例的进行重传处理的方法，下面将结合图8至图19，描述根据本申请实施例的进行重传处理的装置，方法实施例所描述的技术特征可以适用于以下装置实施例。
图8示出了根据本申请实施例的进行重传处理的装置1000的示意性框图。如图8所示，该装置1000包括：
发送单元1100，用于向第一辅基站发送指示信息，该指示信息用于指示该第一辅基站在向用户设备发送数据后，向装置1000发送反馈信息；
接收单元1200，用于接收该第一辅基站根据该指示信息发送的该反馈信息，该反馈信息用于指示该第一辅基站已向用户设备发送该数据；
处理单元1300，用于根据该反馈信息，进行该数据的重传处理。
应理解，上述第一辅基站可以是一个，也可以是多个，本申请对此不作限定，上述装置1000可以是多连接场景中的主基站。
为了充分利用到多连接的灵活性，并使得主基站能够及时掌握各条链路的传输情况，可以将重传功能位于较高的PDCP实体，并在每条链路上的RLC实体发送数据之后即向主基站的PDCP实体反馈，使得主基站的PDCP实体能够充分利用多链路的灵活性，选择更可靠的链路进行重传，避免持续使用质量较差的链路造成用户设备接收数据的重排序时延较大。
可选地，在本申请实施例中，该处理单元1300具体用于：
根据该反馈信息，向该用户设备发送询问信息，该询问信息用于询问该用户设备是否正确接收到该第一辅基站发送的该数据；
接收该用户设备发送的该询问信息的响应信息；
根据该询问信息的响应信息，进行该数据的重传处理。
本申请实施例提供的进行重传处理的装置，基于反馈信息向用户设备发送询问信息，并根据接收到的询问信息的响应信息进行重传处理，使得装置1000能够及时检测到各个辅基站是否有数据丢失，以便于有数据丢失时采用其他传输质量较好的辅基站上发起重传，可以充分利用到多连接的灵活性，从而减少了重排序时延。
可选地，在本申请实施例中，该指示信息还用于指示该第一辅基站对该第一辅基站发送的该数据不进行重传处理。
通过指示辅基站不启用ARQ功能，可以利用装置1000向用户设备一次询问多个辅基站的传输情况，避免了由于各个辅基站与用户设备之间的交互，从而造成空口资源浪费的问题。
可选地，在本申请实施例中，该处理单元1300具体用于：
根据该询问信息的响应信息，确定该用户设备未正确接收该第一辅基站发送的该数据；向第二辅基站发送该数据，该第二辅基站用于向该用户设备发送该数据。
与第一辅基站类似，该第二辅基站可以是一个，也可以是多个，本申请不限于此。
具体地，当确定单元确定该用户设备未正确接收该第一辅基站发送的数据，该确定单元可以根据其他辅基站的缓存情况或者第一辅基站未传输成功的数据量的大小，确定一个或多个第二辅基站向用户设备发送该数据。
当丢失的数据较多时，确定单元可以根据数据丢失的情况，选择一个合适的辅基站进行重传，避免持续使用传输状态不好的辅基站，造成重排序时延。
可选地，在本申请实施例中，该处理单元1300具体用于：
根据该询问信息的响应信息，确定该用户设备未正确接收该第一辅基站发送的该数据；该主基站向该第一辅基站发送通知消息，该通知消息用于指示该第一辅基站重新向用户设备发送该数据。
当个别数据丢失，而不是因为链路不稳定导致的数据丢失时，利用原有的辅基站重传数据，可以减少基站与基站之间的接口流量。
可选地，在本申请实施例中，该确定单元根据该反馈信息，向该用户设备发送询问信息，包括：通过第三辅基站发送该询问信息；该确定单元接收该用户设备发送的该询问信息的响应信息，包括：通过该第三辅基站接收该用户设备发送的该询问信息的响应信息。
可选地，在本申请实施例中，该装置1000还包括：
指示单元，用于指示该用户设备通过第四辅基站向该装置1000发送该询问信息的响应信息。
由装置1000来指引用户设备，可以通过动态或者静态的方式指示用户设备发送响应信息的路径，可以使得响应信息能够在更可靠的路径上传输，充分利用多连接的灵活性。
应理解，根据本申请实施例的装置1000可对应于本申请实施例的进行重传处理的方法200和方法300中的主基站，并且装置1000中的各个模块的上述和其它操作和/或功能分别为了实现图4和图5的各个方法中主基站相应流程，为了简洁，在此不再赘述。
图9示出了根据本申请实施例的进行重传处理的装置2000。如图9所示，该装置2000包括：
第一接收单元2100，用于接收主基站发送的指示信息，该指示信息用于指示该第一辅基站在向用户设备发送第一数据后，向该主基站发送反馈信息；
第一发送单元2200，用于根据该指示信息，在向该用户设备发送该第一至少部分数据后，向该主基站发送该反馈信息，该反馈信息用于该主基站进行该第一数据的重传处理。
通过指示装置2000在向用户设备发送数据之后即向主基站进行反馈，使得主基站能够及时掌握各个辅基站的发送情况，从而可以克服重传时机不灵活的问题。
可选地，在本申请实施例中，该指示信息还用于指示该装置2000对发送的数据不进 行重传处理，该装置2000还包括：配置单元2300，用于根据该指示信息，对发送的数据不进行重传处理。
通过指示装置2000不作重传处理，可以利用主基站向用户设备一次询问多个装置2000的传输情况，避免了由于各个装置2000与用户设备之间的交互，从而造成空口资源浪费的问题。
可选地，在本申请实施例中，该装置2000还包括：
第二接收单元2400，用于接收该主基站发送的通知消息，该通知消息用于指示该装置2000重新向该用户设备发送该第一数据。
当个别数据丢失，而不是因为链路不稳定导致的数据丢失时，利用原有的装置2000重传数据，可以减少基站与基站之间的接口流量。
可选地，在本申请实施例中，该装置2000还包括：
第三接收单元2500，用于接收主基站发送的其他装置2000未传输成功的第二数据；
第二发送单元2600，用于向该用户设备发送该第二数据。
当丢失的数据较多时，主基站可以根据数据丢失的情况，选择一个合适的装置2000进行重传，避免持续使用传输状态不好的装置2000，造成重排序时延。
应理解，根据本申请实施例的装置2000可对应于本申请实施例的进行重传处理的方法200和300的中的第一辅基站，并且装置2000中的各个模块的上述和其它操作和/或功能分别为了实现图4和图5的各个方法中第一辅基站的相应流程，为了简洁，在此不再赘述。
图10示出了根据本申请实施例的进行重传处理的装置3000。如图10所示，该装置3000包括：
第一接收单元3100，用于接收主基站基于反馈信息发送的询问信息，该反馈信息用于指示第一辅基站已向该用户设备发送数据，该询问信息用于询问该用户设备是否正确接收该第一辅基站发送的该数据；
发送单元3200，用于向该主基站发送该询问信息的响应信息。
应理解，上述第一辅基站可以是一个，也可以是多个，本申请不作限定。
接收主基站基于反馈信息发送的询问信息，并向主基站发送该询问信息的响应信息，使得主基站能够及时检测到各个辅基站是否有数据丢失，以便于有数据丢失时采用其他传输质量较好的辅基站上发起重传，可以充分利用到多连接的灵活性，从而减少了重排序时延。
可选地，在本申请实施例中，该第一接收单元3100具体用于：
接收该主基站通过第二辅基站发送的该询问信息；
该发送单元3200具体用于：
通过该第二辅基站向该主基站发送该询问信息的响应信息。
可选地，在本申请实施例中，该装置3000还包括：
第二接收单元3300，用于接收该主基站发送的指示信息，该指示信息用于指示该装置3000通过第三辅基站向该主基站发送该询问信息的响应信息。
由主基站来指引装置3000，可以通过动态或者静态的方式指示装置3000发送响应信息的路径，可以使得响应信息能够在更可靠的路径上传输，充分利用多连接的灵活性。
应理解，根据本申请实施例的装置3000可对应于本申请实施例的进行重传处理的方 法200和300的用户设备，并且装置3000中的各个模块的上述和其它操作和/或功能分别为了实现图4和图5中的各个方法中用户设备的相应流程，为了简洁，在此不再赘述。
因此，本申请实施例提供的进行重传处理的装置，重传处理由PDCP实体执行，提高重传链路选择的灵活性，主基站可根据多个链路的发送情况，及时估计其中一条链路因质量变差而导致的数据丢失，并快速在其它链路发起重传，降低用户设备的PDCP实体重排序时延；另外，RLC实体不采用ARQ，节省了RLC实体在多条链路上向用户设备发送的询问信息以及用户设备发送的多条RLC状态报告，而是由一条响应主基站的PDCP实体的响应信息取代，响应信息的目的是指示数据是否正确接收，PDCP实体重传机制不关心数据在哪条链路上传输，而是从全局的角度询问用户设备当前的接收状态；用户设备能够响应主基站的PDCP实体发送的询问信息，并且能够根据网络的指引，选择一条路径发送询问信息的响应信息，使得该询问信息的响应信息在质量较好的链路上传输，充分利用多连接的灵活性。
图11示出了根据本申请实施例的进行重传处理的装置4000。如图11所示，该装置4000包括：
接收单元4100，用于接收该用户设备的第一无线链路控制RLC实体发送的反馈信息，该反馈信息用于指示该第一RLC实体已向主基站发送数据；
处理单元4200，用于根据该反馈信息，进行该数据的重传处理。
用户设备的RLC实体在向主基站发送数据之后即向装置4000进行反馈，使得装置4000能够及时掌握用户设备各个RLC实体的发送情况，从而可以克服重传时机不灵活的问题。
应理解，上述第一RLC实体可以是一个，也可以是多个，本申请对此不作限定。
可选地，在本申请实施例中，该处理单元4200具体用于：
根据该反馈信息，向该主基站发送询问信息，该询问信息用于询问该主基站是否正确接收到该用户设备的第一RLC实体发送的该数据；接收该主基站发送的该询问信息的响应信息；根据该询问信息的响应信息，进行该数据的重传处理。
基于反馈信息向主基站发送询问信息，并根据接收到的询问信息的响应信息进行重传处理，使得装置4000能够及时检测到用户设备各个RLC实体是否有数据丢失，以便于有数据丢失时采用其他传输质量较好的RLC实体上发起重传，可以充分利用到多连接的灵活性，从而减少了重排序时延。
可选地，在本申请实施例中，该确定单元4200具体用于：
根据该询问信息的响应信息，确定该主基站未正确接收该用户设备的第一RLC实体发送的该数据；向该用户设备的第二RLC实体发送该数据，该用户设备的第二RLC实体用于向该主基站发送该数据。
当丢失的数据较多时，装置4000可以根据数据丢失的情况，选择一个合适的RLC实体进行重传，避免持续使用传输状态不好的RLC实体，造成重排序时延。
可选地，在本申请实施例中，该确定单元4200具体用于：
根据该询问信息的响应信息，确定该主基站未正确接收该用户设备的第一RLC实体发送的该至少部分数据；向该用户设备的第一RLC实体发送通知消息，该通知消息用于指示该用户设备的第一RLC实体重新发送该数据。
可选地，在本申请实施例中，该确定单元4200具体用于：
根据该反馈信息以及该用户设备的第一RLC实体的发送窗口状况，向该主基站发送该询问信息。
应理解，本申请实施例中对下行数据的重传处理与对上行数据的重传处理属于同一构思，其具体实现过程详见发送下行数据时的方法实施例，这里不再赘述。
图12示出了根据本申请实施例的进行重传处理的装置5000。如图12所示，该装置5000包括：
第一接收单元5100，用于接收主基站发送的指示信息，该指示信息用于指示该装置5000在向该主基站发送第一数据后，向该用户设备的PDCP实体发送反馈信息；
第一发送单元5200，用于根据该指示信息，在向主基站发送该第一数据后，向该用户设备的PDCP实体发送该反馈信息，该反馈信息用于该用户设备的PDCP实体进行该第一数据的重传处理。
通过指示装置5000在向主基站发送数据之后即向用户设备的PDCP实体进行反馈，使得用户设备的PDCP实体能够及时掌握各个装置5000的发送情况，从而可以克服重传时机不灵活的问题。
可选地，在本申请实施例中，该指示信息还用于指示该装置5000对发送的数据不进行重传处理，该装置5000还包括：
配置单元5300，用于根据该指示信息，对发送的数据不进行重传处理。
通过指示装置5000对该第一数据不进行重传处理，可以利用用户设备的PDCP实体向主基站一次询问多个装置5000的传输情况，避免了由于各个装置5000分别与主基站之间的交互，从而造成空口资源浪费的问题。
可选地，在本申请实施例中，该装置5000还包括：
第二接收单元5400，用于接收该用户设备的PDCP实体发送的通知消息，该通知消息用于指示该装置5000重新向主基站发送该第一数据。
可选地，在本申请实施例中，该装置5000还包括：
第三接收单元5500，用于接收该用户设备的PDCP实体发送的其他装置5000未传输成功的第二数据；
第二发送单元5600，用于向该主基站发送该第二数据。
当丢失的数据较多时，用户设备的PDCP实体可以根据数据丢失的情况，选择一个合适的装置5000进行重传，避免持续使用传输状态不好的装置5000，造成重排序时延较大。
图13示出了根据本申请实施例的进行重传处理的装置6000。如图13所示，该装置6000包括：
接收单元6100，用于接收用户设备的PDCP实体发送的询问信息，该询问信息用于询问该装置6000是否正确接收该用户设备的第一RLC实体发送的数据；
发送单元6200，用于向该用户设备的PDCP实体发送该询问信息的响应信息。
接收用户设备的PDCP实体基于反馈信息发送的询问信息，并用户设备的PDCP实体发送该询问信息的响应信息，使得用户设备的PDCP实体能够及时检测到各个RLC实体是否有数据丢失，以便于有数据丢失时采用其他传输质量较好的RLC实体上发起重传，可以充分利用到多连接的灵活性，从而减少了重排序时延。
因此，本申请实施例提供的进行重传处理的装置，重传处理由PDCP实体执行，提 高重传链路选择的灵活性，用户设备的PDCP实体可根据多个链路的发送情况，及时估计其中一条链路因质量变差而导致的数据丢失，并快速在其它链路发起重传，降低主基站的PDCP实体重排序时延；另外，RLC实体不采用ARQ，节省了RLC实体在多条链路上的与主基站进行询问交互，而是由用户设备的PDCP实体与主基站进行询问交互取代，PDCP实体重传机制不关心数据在哪条链路上传输，而是从全局的角度询问用户设备当前的接收状态；主基站能够响应用户设备的PDCP实体发送的询问信息。
需要说明的一点是，上述实施例提供的装置在实现其功能时，仅以上述各功能单元的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能单元完成，即将设备的内部结构划分成不同的功能单元，以完成以上描述的全部或者部分功能。另外，上述实施例提供的装置与方法实施例属于同一构思，其具体实现过程详见方法实施例，这里不再赘述。
图14示出了根据本申请实施例的装置10的示意性框图。图14所示的装置10包括：存储器11、处理器12、收发器13、通信接口14和总线系统15。其中，存储器11、处理器12、收发器13和通信接口14通过总线系统15相连，该存储器11用于存储指令，该处理器12用于执行该存储器11存储的指令，以控制收发器13接收输入的数据和信息，输出操作结果等数据，并控制通信接口14发送信号。
处理器12，用于通过所述收发器向第一辅基站发送指示信息，所述指示信息用于指示所述第一辅基站在向用户设备发送数据后，向所述处理器发送反馈信息；并通过所述收发器接收所述第一辅基站根据所述指示信息发送的所述反馈信息；以及根据所述反馈信息，进行该数据的重传处理。
应理解，在本申请实施例中，该处理器12可以采用通用的中央处理器(Central Processing Unit，CPU)，微处理器，应用专用集成电路(Application Specific Integrated Circuit，ASIC)，或者一个或多个集成电路，用于执行相关程序，以实现本申请实施例所提供的技术方案。
还应理解，通信接口14使用例如但不限于收发器一类的收发装置，来实现装置10与其他设备或通信网络之间的通信。
该存储器11可以包括只读存储器和随机存取存储器，并向处理器12提供指令和数据。处理器12的一部分还可以包括非易失性随机存取存储器。例如，处理器12还可以存储设备类型的信息。
该总线系统15除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统15。
在实现过程中，上述方法的各步骤可以通过处理器12中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的无线通信的方法可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器11，处理器12读取存储器11中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应理解，根据本申请实施例的装置10可对应于本申请实施例的进行重传处理的各个方法中的主基站，并可以对应于根据本申请实施例的装置1000，并且装置1000中的各个模块的上述和其它操作和/或功能分别为了实现图4和图5中的各个方法的相应流程，为 了简洁，在此不再赘述。
图15示出了根据本申请实施例的装置20的示意性框图。图15所示的装置20包括：存储器21、处理器22、收发器23、通信接口24和总线系统25。其中，存储器21、处理器22、收发器23和通信接口24通过总线系统25相连，该存储器21用于存储指令，该处理器22用于执行该存储器21存储的指令，以控制收发器23接收输入的数据和信息，输出操作结果等数据，并控制通信接口24发送信号。
处理器22，用于通过所述收发器接收主基站发送的指示信息，所述指示信息用于指示所述第一辅基站在向用户设备发送第一数据后，向所述主基站发送反馈信息；根据所述指示信息，在向所述用户设备发送所述第一数据后，通过所述收发器向所述主基站发送所述反馈信息，所述反馈信息用于所述主基站进行该第一数据的重传处理。
应理解，在本申请实施例中，该处理器22可以采用通用的中央处理器(Central Processing Unit，CPU)，微处理器，应用专用集成电路(Application Specific Integrated Circuit，ASIC)，或者一个或多个集成电路，用于执行相关程序，以实现本申请实施例所提供的技术方案。
还应理解，通信接口24使用例如但不限于收发器一类的收发装置，来实现装置20与其他设备或通信网络之间的通信。
该存储器21可以包括只读存储器和随机存取存储器，并向处理器22提供指令和数据。处理器22的一部分还可以包括非易失性随机存取存储器。例如，处理器22还可以存储设备类型的信息。
该总线系统25除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统25。
在实现过程中，上述方法的各步骤可以通过处理器22中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的无线通信的方法可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器21，处理器22读取存储器21中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应理解，根据本申请实施例的装置20可对应于本申请实施例的进行重传处理的各个方法中的第一辅基站，并可以对应于根据本申请实施例的装置2000，并且装置2000中的各个模块的上述和其它操作和/或功能分别为了实现图4和图5中的方法的相应流程，为了简洁，在此不再赘述。
图16示出了根据本申请实施例的装置30的示意性框图。图16所示的装置30包括：存储器31、处理器32、收发器33、通信接口34和总线系统35。其中，存储器31、处理器32、收发器33和通信接口34通过总线系统35相连，该存储器31用于存储指令，该处理器32用于执行该存储器31存储的指令，以控制收发器33接收输入的数据和信息，输出操作结果等数据，并控制通信接口34发送信号。
处理器32，用于通过所述收发器接收主基站基于反馈信息发送的询问信息，所述反馈信息用于指示第一辅基站已向所述用户设备发送数据，所述询问信息用于询问所述用户设备是否正确接收所述第一辅基站发送的所述数据；通过所述收发器向所述主基站发送所述询问信息的响应信息。
应理解，在本申请实施例中，该处理器32可以采用通用的中央处理器(Central Processing Unit，CPU)，微处理器，应用专用集成电路(Application Specific Integrated Circuit，ASIC)，或者一个或多个集成电路，用于执行相关程序，以实现本申请实施例所提供的技术方案。
还应理解，通信接口34使用例如但不限于收发器一类的收发装置，来实现装置30与其他设备或通信网络之间的通信。
该存储器31可以包括只读存储器和随机存取存储器，并向处理器32提供指令和数据。处理器32的一部分还可以包括非易失性随机存取存储器。例如，处理器32还可以存储设备类型的信息。
该总线系统35除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统35。
在实现过程中，上述方法的各步骤可以通过处理器32中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的无线通信的方法可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器31，处理器32读取存储器31中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应理解，根据本申请实施例的装置30可对应于本申请实施例的进行重传处理的各个方法中的用户设备，并可以对应于根据本申请实施例的装置3000，并且装置3000中的各个模块的上述和其它操作和/或功能分别为了实现图4和图5中的方法的相应流程，为了简洁，在此不再赘述。
因此，本申请实施例提供的进行重传处理的装置，重传处理由PDCP实体执行，提高重传链路选择的灵活性，主基站可根据多个链路的发送情况，及时估计其中一条链路因质量变差而导致的数据丢失，并快速在其它链路发起重传，降低用户设备的PDCP实体重排序时延；另外，RLC实体不采用ARQ，节省了RLC实体在多条链路上向用户设备发送的询问信息以及用户设备发送的多条RLC状态报告，而是由一条响应主基站的PDCP实体的响应信息取代，响应信息的目的是指示数据是否正确接收，PDCP实体重传机制不关心数据在哪条链路上传输，而是从全局的角度询问用户设备当前的接收状态；用户设备能够响应主基站的PDCP实体发送的询问信息，并且能够根据网络的指引，选择一条路径发送询问信息的响应信息，使得该询问信息的响应信息在质量较好的链路上传输，充分利用多连接的灵活性。
图17示出了根据本申请实施例的装置40的示意性框图。图17所示的装置40包括：存储器41、处理器42、收发器43、通信接口44和总线系统45。其中，存储器41、处理器42、收发器43和通信接口44通过总线系统45相连，该存储器41用于存储指令，该处理器42用于执行该存储器41存储的指令，以控制收发器43接收输入的数据和信息，输出操作结果等数据，并控制通信接口44发送信号。
处理器42，用于接收该用户设备的第一无线链路控制RLC实体发送的反馈信息，该反馈信息用于指示该第一RLC实体已向主基站发送数据；根据该反馈信息，进行该数据的重传处理。
应理解，在本申请实施例中，该处理器42可以采用通用的中央处理器(Central  Processing Unit，CPU)，微处理器，应用专用集成电路(Application Specific Integrated Circuit，ASIC)，或者一个或多个集成电路，用于执行相关程序，以实现本申请实施例所提供的技术方案。
还应理解，通信接口44使用例如但不限于收发器一类的收发装置，来实现装置40与其他设备或通信网络之间的通信。
该存储器41可以包括只读存储器和随机存取存储器，并向处理器42提供指令和数据。处理器42的一部分还可以包括非易失性随机存取存储器。例如，处理器42还可以存储设备类型的信息。
该总线系统45除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统45。
在实现过程中，上述方法的各步骤可以通过处理器42中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的无线通信的方法可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器41，处理器42读取存储器41中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应理解，根据本申请实施例的装置40可对应于本申请实施例的进行重传处理的各个方法中的用户设备的PDCP实体，并可以对应于根据本申请实施例的装置4000，并且装置4000中的各个模块的上述和其它操作和/或功能分别为了实现图7中的方法的相应流程，为了简洁，在此不再赘述。
图18示出了根据本申请实施例的装置50的示意性框图。图18所示的装置50包括：存储器51、处理器52、收发器53、通信接口54和总线系统55。其中，存储器51、处理器52、收发器53和通信接口54通过总线系统55相连，该存储器51用于存储指令，该处理器52用于执行该存储器51存储的指令，以控制收发器53接收输入的数据和信息，输出操作结果等数据，并控制通信接口54发送信号。
处理器52，用于接收主基站发送的指示信息，该指示信息用于指示该用户设备的第一RLC实体在向该主基站发送第一数据后，向该用户设备的PDCP实体发送反馈信息；根据该指示信息，在向主基站发送该第一数据后，向该用户设备的PDCP实体发送该反馈信息，该反馈信息用于该用户设备的PDCP实体进行该第一数据的重传处理。
应理解，在本申请实施例中，该处理器52可以采用通用的中央处理器(Central Processing Unit，CPU)，微处理器，应用专用集成电路(Application Specific Integrated Circuit，ASIC)，或者一个或多个集成电路，用于执行相关程序，以实现本申请实施例所提供的技术方案。
还应理解，通信接口54使用例如但不限于收发器一类的收发装置，来实现装置50与其他设备或通信网络之间的通信。
该存储器51可以包括只读存储器和随机存取存储器，并向处理器52提供指令和数据。处理器52的一部分还可以包括非易失性随机存取存储器。例如，处理器52还可以存储设备类型的信息。
该总线系统55除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统55。
在实现过程中，上述方法的各步骤可以通过处理器52中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的无线通信的方法可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器51，处理器52读取存储器51中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应理解，根据本申请实施例的装置50可对应于本申请实施例的进行重传处理的各个方法中的用户设备的第一RLC实体，并可以对应于根据本申请实施例的装置5000，并且装置5000中的各个模块的上述和其它操作和/或功能分别为了实现图7中的方法的相应流程，为了简洁，在此不再赘述。
图19示出了根据本申请实施例的装置60的示意性框图。图19所示的装置60包括：存储器61、处理器62、收发器63、通信接口64和总线系统65。其中，存储器61、处理器62、收发器63和通信接口64通过总线系统65相连，该存储器61用于存储指令，该处理器62用于执行该存储器61存储的指令，以控制收发器63接收输入的数据和信息，输出操作结果等数据，并控制通信接口64发送信号。
处理器62，用于接收用户设备的PDCP实体发送的询问信息，所述询问信息用于询问该主基站是否正确接收该用户设备的第一RLC实体发送的数据；向该用户设备的PDCP实体发送该询问信息的响应信息。
应理解，在本申请实施例中，该处理器62可以采用通用的中央处理器(Central Processing Unit，CPU)，微处理器，应用专用集成电路(Application Specific Integrated Circuit，ASIC)，或者一个或多个集成电路，用于执行相关程序，以实现本申请实施例所提供的技术方案。
还应理解，通信接口64使用例如但不限于收发器一类的收发装置，来实现装置60与其他设备或通信网络之间的通信。
该存储器61可以包括只读存储器和随机存取存储器，并向处理器62提供指令和数据。处理器62的一部分还可以包括非易失性随机存取存储器。例如，处理器62还可以存储设备类型的信息。
该总线系统65除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。但是为了清楚说明起见，在图中将各种总线都标为总线系统65。
在实现过程中，上述方法的各步骤可以通过处理器62中的硬件的集成逻辑电路或者软件形式的指令完成。结合本申请实施例所公开的无线通信的方法可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器61，处理器62读取存储器61中的信息，结合其硬件完成上述方法的步骤。为避免重复，这里不再详细描述。
应理解，根据本申请实施例的装置60可对应于本申请实施例的进行重传处理的各个方法中的主基站，并可以对应于根据本申请实施例的装置6000，并且装置6000中的各个模块的上述和其它操作和/或功能分别为了实现图7中的方法的相应流程，为了简洁，在此不再赘述。
因此，本申请实施例提供的进行重传处理的装置，重传处理由PDCP实体执行，提 高重传链路选择的灵活性，用户设备的PDCP实体可根据多个链路的发送情况，及时估计其中一条链路因质量变差而导致的数据丢失，并快速在其它链路发起重传，降低主基站的PDCP实体重排序时延；另外，RLC实体不采用ARQ，节省了RLC实体在多条链路上的与主基站进行询问交互，而是由用户设备的PDCP实体与主基站进行询问交互取代，PDCP实体重传机制不关心数据在哪条链路上传输，而是从全局的角度询问用户设备当前的接收状态；主基站能够响应用户设备的PDCP实体发送的询问信息。
应理解，在本申请实施例中，“与A相应的B”表示B与A相关联，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。
应理解，本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。
应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理模块中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory， ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (30)

  1. 一种进行重传处理的方法，其特征在于，包括：
    主基站向第一辅基站发送指示信息，所述指示信息用于指示所述第一辅基站在向用户设备发送数据后，向所述主基站发送反馈信息；
    所述主基站接收所述第一辅基站根据所述指示信息发送的所述反馈信息，所述反馈信息用于指示所述第一辅基站已向所述用户设备发送所述数据；
    所述主基站根据所述反馈信息，进行所述数据的重传处理。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    所述主基站根据所述反馈信息，向所述用户设备发送询问信息，所述询问信息用于询问所述用户设备是否正确接收到所述第一辅基站发送的所述数据；
    所述主基站接收所述用户设备发送的所述询问信息的响应信息；
    所述主基站根据所述反馈信息，进行所述数据的重传处理，包括：
    所述主基站根据由所述反馈信息确定的所述询问信息的响应信息，进行所述数据的重传处理。
  3. 根据权利要求2所述的方法，其特征在于，所述主基站根据由所述反馈信息确定的所述询问信息的响应信息，进行所述数据的重传处理，包括：
    所述主基站根据所述询问信息的响应信息，确定所述用户设备未正确接收所述第一辅基站发送的所述数据；
    所述主基站向第二辅基站发送所述数据，所述第二辅基站用于向所述用户设备发送所述数据。
  4. 根据权利要求2所述的方法，其特征在于，所述主基站根据由所述反馈信息确定的所述询问信息的响应信息，进行所述数据的重传处理，包括：
    所述主基站根据所述询问信息的响应信息，确定所述用户设备未正确接收所述第一辅基站发送的所述数据；
    所述主基站向所述第一辅基站发送通知消息，所述通知消息用于指示所述第一辅基站重新向所述用户设备发送所述数据。
  5. 根据权利要求2至4中任一项所述的方法，其特征在于，所述主基站根据所述反馈信息，向所述用户设备发送询问信息，包括：
    所述主基站通过第三辅基站向所述用户设备发送所述询问信息；
    所述主基站接收所述用户设备发送的所述询问信息的响应信息，包括：
    所述主基站通过所述第三辅基站接收所述用户设备发送的所述询问信息的响应信息。
  6. 根据权利要求2至4中任一项所述的方法，其特征在于，所述主基站在接收所述用户设备发送的所述询问信息的响应信息之前，所述方法还包括：
    所述主基站指示所述用户设备通过第四辅基站向所述主基站发送所述询问信息的响应信息。
  7. 根据权利要求2至6中任一项所述的方法，其特征在于，所述主基站根据所述反馈信息，向所述用户设备发送询问信息，包括：
    所述主基站根据所述反馈信息以及所述第一辅基站的发送窗口状况，向所述用户设备发送所述询问信息。
  8. 根据权利要求1至7中任一项所述的方法，其特征在于，所述指示信息还用于指示所述第一辅基站对所述第一辅基站发送的所述数据不进行重传处理。
  9. 一种进行重传处理的方法，其特征在于，包括：
    第一辅基站接收主基站发送的指示信息，所述指示信息用于指示所述第一辅基站在向用户设备发送第一数据后，向所述主基站发送反馈信息；
    所述第一辅基站根据所述指示信息，在向所述用户设备发送所述第一数据后，向所述主基站发送所述反馈信息，所述反馈信息用于所述主基站进行所述第一数据的重传处理。
  10. 根据权利要求9所述的方法，其特征在于，所述指示信息还用于指示所述第一辅基站对所述第一辅基站发送的所述第一数据不进行重传处理，所述方法还包括：
    所述第一辅基站根据所述指示信息，对所述第一数据不进行重传处理。
  11. 根据权利要求9或10所述的方法，其特征在于，所述方法还包括：
    所述第一辅基站接收所述主基站发送的通知消息，所述通知消息用于指示所述第一辅基站重新向所述用户设备发送所述第一数据。
  12. 根据权利要求9或10所述的方法，其特征在于，所述方法还包括：
    所述第一辅基站接收所述主基站发送的第二辅基站未传输成功的第二数据；
    所述第一辅基站向所述用户设备发送所述第二数据。
  13. 一种进行重传处理的方法，其特征在于，包括：
    用户设备接收主基站基于反馈信息发送的询问信息，所述反馈信息用于指示第一辅基站已向所述用户设备发送数据，所述询问信息用于询问所述用户设备是否正确接收所述第一辅基站发送的所述数据；
    所述用户设备向所述主基站发送所述询问信息的响应信息。
  14. 根据权利要求13所述的方法，其特征在于，所述用户设备接收主基站发送的询问信息，包括：
    所述用户设备接收所述主基站通过第二辅基站发送的所述询问信息；
    所述用户设备向所述主基站发送所述询问信息的响应信息，包括：
    所述用户设备通过所述第二辅基站向所述主基站发送所述询问信息的响应信息。
  15. 根据权利要求13所述的方法，其特征在于，所述用户设备在向所述主基站发送所述询问信息的响应信息之前，所述方法还包括：
    所述用户设备接收所述主基站发送的指示信息，所述指示信息用于指示所述用户设备通过第三辅基站向所述主基站发送所述询问信息的响应信息。
  16. 一种进行重传处理的装置，其特征在于，包括：
    收发器；
    存储器，用于存储指令；
    处理器，与所述存储器和所述收发器分别相连，用于执行所述存储器存储的所述指令，以在执行所述指令时执行如下步骤：
    通过所述收发器向第一辅基站发送指示信息，所述指示信息用于指示所述第一辅基站在向用户设备发送数据后，向所述装置发送反馈信息；并通过所述收发器接收所述第一辅基站根据所述指示信息发送的所述反馈信息，所述反馈信息用于指示所述第一辅基站已向所述用户设备发送所述数据；根据所述反馈信息，进行所述数据的重传处理。
  17. 根据权利要求16所述的装置，其特征在于，所述处理器具体用于：
    根据所述反馈信息，通过所述收发器向所述用户设备发送询问信息，所述询问信息用于询问所述用户设备是否正确接收到所述第一辅基站发送的所述数据；并通过所述收发器接收所述用户设备发送的所述询问信息的响应信息；根据所述询问信息的响应信息，进行所述数据的重传处理。
  18. 根据权利要求17所述的装置，其特征在于，所述处理器具体用于：
    根据所述询问信息的响应信息，确定所述用户设备未正确接收所述第一辅基站发送的所述数据；通过所述收发器向第二辅基站发送所述数据，所述第二辅基站用于向所述用户设备发送所述数据。
  19. 根据权利要求17所述的装置，其特征在于，所述处理器具体用于：
    根据所述询问信息的响应信息，确定所述用户设备未正确接收所述第一辅基站发送的所述数据；通过所述收发器向所述第一辅基站发送通知消息，所述通知消息用于指示所述第一辅基站重新向所述用户设备发送所述数据。
  20. 根据权利要求17至19中任一项所述的装置，其特征在于，所述处理器具体用于：
    通过第三辅基站向所述用户设备发送所述询问信息；并通过所述第三辅基站接收所述用户设备发送的所述询问信息的响应信息。
  21. 根据权利要求17至19中任一项所述的装置，其特征在于，所述处理器还用于：
    指示所述用户设备通过第四辅基站向所述装置发送所述询问信息的响应信息。
  22. 根据权利要求17至21中任一项所述的装置，其特征在于，所述处理器具体用于：
    根据所述反馈信息以及所述第一辅基站的发送窗口状况，通过所述收发器向所述用户设备发送所述询问信息。
  23. 根据权利要求16至22中任一项所述的装置，其特征在于，所述指示信息还用于指示所述第一辅基站对所述第一辅基站发送的所述数据不进行重传处理。
  24. 一种进行重传处理的装置，其特征在于，包括：
    收发器；
    存储器，用于存储指令；
    处理器，与所述存储器和所述收发器分别相连，用于执行所述存储器存储的所述指令，以在执行所述指令时执行如下步骤：
    通过所述收发器接收主基站发送的指示信息，所述指示信息用于指示所述装置在向用户设备发送第一数据后，向所述主基站发送反馈信息；根据所述指示信息，在向所述用户设备发送所述第一数据后，通过所述收发器向所述主基站发送所述反馈信息，所述反馈信息用于所述主基站进行所述第一数据的重传处理。
  25. 根据权利要求24所述的装置，其特征在于，所述指示信息还用于指示所述装置对所述第一辅基站发送的所述第一数据不进行重传处理，所述处理器还用于：
    根据所述指示信息，对所述第一数据不进行重传处理。
  26. 根据权利要求24或25所述的装置，其特征在于，所述处理器还用于：
    通过所述收发器接收所述主基站发送的通知消息，所述通知消息用于指示所述装置重新向所述用户设备发送所述第一数据。
  27. 根据权利要求24或25所述的装置，其特征在于，所述处理器还用于：
    通过所述收发器接收所述主基站发送的第二辅基站未传输成功的第二数据；通过所述收发器向所述用户设备发送所述第二数据。
  28. 一种进行重传处理的装置，其特征在于，包括：
    收发器；
    存储器，用于存储指令；
    处理器，与所述存储器和所述收发器分别相连，用于执行所述存储器存储的所述指令，以在执行所述指令时执行如下步骤：
    通过所述收发器接收主基站基于反馈信息发送的询问信息，所述反馈信息用于指示第一辅基站已向所述装置发送数据，所述询问信息用于询问所述装置是否正确接收所述第一辅基站发送的所述数据；通过所述收发器向所述主基站发送所述询问信息的响应信息。
  29. 根据权利要求28所述的装置，其特征在于，所述处理器具体用于：
    接收所述主基站通过第二辅基站发送的所述询问信息；通过所述第二辅基站向所述主基站发送所述询问信息的响应信息。
  30. 根据权利要求28所述的装置，其特征在于，所述处理器还用于：
    通过所述收发器接收所述主基站发送的指示信息，所述指示信息用于指示所述装置通过第三辅基站向所述主基站发送所述询问信息的响应信息。
PCT/CN2017/093300 2016-08-11 2017-07-18 进行重传处理的方法和装置 WO2018028391A1 (zh)

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