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EP-3944647-B1 - METHODS AND APPARATUSES FOR BEARER SPLITTING TRANSMISSION VIA A SIDELINK INTERFACE

EP3944647B1EP 3944647 B1EP3944647 B1EP 3944647B1EP-3944647-B1

Inventors

  • ZHAO, YALI

Dates

Publication Date
20260506
Application Date
20200309

Claims (12)

  1. An information processing method performed by a transmission terminal, the method comprises: determining (101, 601, 801), for a sidelink interface, whether to enable a bearer-splitting transmission mode for a radio bearer; obtaining (102) a relationship between a Packet Data Convergence Protocol, PDCP, entity corresponding to the radio bearer and Radio Link Control, RLC, entities corresponding to the radio bearer in a case of determining to enable the bearer-splitting transmission mode for the radio bearer; wherein a quantity of RLC entities corresponding to the PDCP entity is N, N is an integer and N ≥ 2, characterised by : obtaining (102) the relationship between the packet data convergence protocol, PDCP, entity corresponding to the radio bearer and the radio link control, RLC, entities corresponding to the radio bearer comprises: determining, by the transmission terminal itself, a relationship among logical channel identities of multiple RLC layers corresponding to the radio bearer, and, the method further comprises: indicating, to a reception terminal, the relationship via the sidelink interface, wherein indicating, to the reception terminal, the relationship via the sidelink interface comprises: indicating (602), through a control-plane signaling over the sidelink interface, to the reception terminal the relationship among logical channel identities of multiple RLC layers corresponding to the radio bearer; or, indicating (802), to the reception terminal, the relationship via the sidelink interface comprises: carrying an identity of a PDCP entity, corresponding to data to be transmitted, of the transmission terminal by using user-plane data over the sidelink interface.
  2. The method according to claim 1, wherein whether to enable the bearer-splitting transmission mode for the radio bearer is determined by using any of following: pre-configuration; being determined by the transmission terminal itself; determination based on configuration from a network.
  3. The method according to claim 1, wherein, different RLC entities correspond to different Media Access Control, MAC, entities.
  4. The method according to claim 1, wherein, the control-plane signaling over the sidelink interface comprises any one of following: a Radio Resource Control, RRC, signaling over the sidelink interface; a Medium Access Control, MAC, signaling over the sidelink interface; a physical layer signaling over the sidelink interface, wherein, the control-plane signaling over the sidelink interface comprises at least one of following: an identity of the PDCP entity; identity information of logical channels of multiple RLC layers associated with the same PDCP entity.
  5. An information processing method performed by a reception terminal, the method comprises: obtaining (201) a relationship between a packet Data Convergence Protocol, PDCP, entity corresponding to a radio bearer and Radio Link Control, RLC, entities corresponding to the radio bearer; processing (202) a received packet according to the relationship; wherein the radio bearer is a bearer for which a sidelink interface enables a bearer-splitting transmission mode; a quantity of the RLC entities corresponding to the PDCP entity is N, N is an integer and N ≥ 2, characterised by : obtaining (201) the relationship between the PDCP entity corresponding to the radio bearer and the RLC entities corresponding to the radio bearer comprises: receiving a control-plane signaling over the sidelink interface, the control-plane signaling over the sidelink interface being transmitted by a transmission terminal; obtaining, based on the control-plane signaling over the sidelink interface, a relationship among logical channel identities of multiple RLC layers corresponding to the radio bearer; or, obtaining (201) the relationship between the PDCP entity corresponding to the radio bearer and the RLC entities corresponding to the radio bearer comprises: receiving user-plane data over the sidelink interface, the user-plane data over the sidelink interface being transmitted by a transmission terminal, wherein the user-plane data over the sidelink interface carries an identity of a PDCP entity, corresponding to data to be transmitted, of the transmission terminal; obtaining, based on the identity of the PDCP entity, the relationship between the PDCP entity corresponding to the radio bearer and the RLC entities corresponding to the radio bearer.
  6. The method according to claim 5, wherein processing (202) the received packet according to the relationship comprises: determining whether there is a RLC entity corresponding to the received packet; establishing a corresponding RLC entity in a case that it is determined that there is no corresponding RLC entity; determining whether there is a PDCP entity corresponding to a target packet according to the relationship and a logical channel identity of the received packet; establishing a corresponding PDCP entity in a case that it is determined that there is no corresponding PDCP entity; associating the RLC entity corresponding to the received packet with the PDCP entity in a case that the corresponding PDCP entity is determined to be available; wherein, there is a bearer-splitting relationship between a logical channel identity of the target packet and the logical channel identity of the received packet.
  7. An information processing apparatus applied to a transmission terminal, the apparatus comprises: a determination module (1101), configured to determine, for a sidelink interface, whether to enable a bearer-splitting transmission mode for a radio bearer; an obtaining module (1102), configured to obtain a relationship between a Packet Data Convergence Protocol, PDCP, entity corresponding to the radio bearer and Radio Link Control, RLC, entities corresponding to the radio bearer in a case of determining to enable the bearer-splitting transmission mode for the radio bearer; wherein a quantity of RLC entities corresponding to the PDCP entity is N, N is an integer and N ≥ 2, characterised in that the obtaining module (1102) is further configured to determine, by itself, a relationship among logical channel identities of multiple RLC layers corresponding to the radio bearer, and the apparatus further comprises an indication module (1130) configured to indicate, to a reception terminal, the relationship via the sidelink interface, wherein the indication module (1130) is specifically configured to: indicate, through a control-plane signaling over the sidelink interface, to the reception terminal the relationship among logical channel identities of multiple RLC layers corresponding to the radio bearer; or, carry an identity of a PDCP entity, corresponding to data to be transmitted, of the transmission terminal by using user-plane data over the sidelink interface.
  8. The information processing apparatus according to claim 7, wherein, whether to enable the bearer-splitting transmission mode for the radio bearer is determined by using any of following: pre-configuration; being determined by the transmission terminal itself; determination based on configuration from a network.
  9. The information processing apparatus according to claim 7, wherein different RLC entities correspond to different Media Access Control, MAC, entities.
  10. The information processing apparatus according to claim 9, wherein, the control-plane signaling over the sidelink interface comprises any one of following: a Radio Resource Control, RRC, signaling over the sidelink interface; a Medium Access Control, MAC, signaling over the sidelink interface; a physical layer signaling over the sidelink interface, wherein, the control-plane signaling over the sidelink interface comprises at least one of following: an identity of the PDCP entity; identity information of logical channels of multiple RLC layers associated with the same PDCP entity.
  11. An information processing apparatus applied to a reception terminal, the apparatus comprises: an obtaining module (1201), configured to obtain a relationship between a Packet Data Convergence Protocol, PDCP, entity corresponding to a radio bearer and Radio Link Control, RLC, entities corresponding to the radio bearer; a processing module (1202), configured to process a received packet according to the relationship; wherein the radio bearer is a bearer for which a sidelink interface enables a bearer-splitting transmission mode; a quantity of RLC entities corresponding to the PDCP entity is N, N is an integer and N ≥ 2, characterised in that the obtaining module (1201) comprises: a second reception submodule configured to receive a control-plane signaling over the sidelink interface, the control-plane signaling over the sidelink interface being transmitted by a transmission terminal; and a second obtaining submodule configured to obtain, based on the control-plane signaling over the sidelink interface, a relationship among logical channel identities of multiple RLC layers corresponding to the radio bearer; or, the obtaining module (1201) comprises: a third reception submodule, configured to receive user-plane data over the sidelink interface, the user-plane data over the sidelink interface being transmitted by a transmission terminal, wherein the user-plane data over the sidelink interface carries an identity of a PDCP entity, corresponding to data to be transmitted, of the transmission terminal; and a third obtaining submodule, configured to obtain, based on the identity of the PDCP entity, the relationship between the PDCP entity corresponding to the radio bearer and the RLC entities corresponding to the radio bearer.
  12. The information processing apparatus according to claim 11, wherein the processing module (1202) is specifically configured to: determine whether there is a RLC entity corresponding to the received packet; establish a corresponding RLC entity in a case that it is determined that there is no corresponding RLC entity; determine whether there is a PDCP entity corresponding to a target packet according to the relationship and a logical channel identity of the received packet; establish a corresponding PDCP entity in a case that it is determined that there is no corresponding PDCP entity; associate the RLC entity corresponding to the received packet with the PDCP entity in a case that the corresponding PDCP entity is determined to be available; wherein, there is a bearer-splitting relationship between a logical channel identity of the target packet and the logical channel identity of the received packet.

Description

TECHNICAL FIELD The present disclosure relates to the field of communication technologies, in particular, relates to an information processing method performed by a transmission terminal, an information processing method performed by a reception terminal, an information processing apparatus applied to a transmission terminal and an information processing apparatus applied to a reception terminal. BACKGROUND Direct communication is allowed between devices in close proximity to each other. A link for direct communication between terminals is defined as a sidelink (Sidelink). Devices in direct communication may be all in an in-network state, or in an off-network state, or some may be in the in-network state and some may be in the off-network state. In new radio (New Radio (NR)) systems, data in one logical channel may be transmitted over multiple carriers simultaneously. If a same radio access technology is used for aggregated carriers, it is more straightforward that only one medium access control (Medium Access Control (MAC)) entity is used only. Through a scheduling function in the MAC entity, the data of the logical channel is scheduled to be transmitted on different carriers, or cells, or bandwidth parts (BWP). A transmission terminal still uses the same radio link control (Radio Link Control (RLC)) entity, thus a reception terminal may receive the data correctly. However, if different radio access technologies are used for the aggregated carriers, e.g., long term evolution (LTE) sidelink and NR sidelink transmission are adopted at the same time, how to schedule the data of the logical channel to be transmitted on different carriers, or cells, or BWPs corresponding to different radio access technologies is not clearly defined in the relevant art. Therefore, when the data of the logical channel is transmitted over multiple carriers via a sidelink interface at the same time, how to make the reception terminal receive the data correctly is the technical problem that needs to be studied. "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Packet Data Convergence Protocol (PDCP) specification (Release 15)", 3GPP STANDARD; TECHNICAL SPECIFICATION; 3GPP TS 36.323 discloses the description of the Packet Data Convergence Protocol (PDCP). An international patent application No. WO 2018/202190 A1 discloses a data transmission processing method and apparatus, and a terminal. SUMMARY The invention is set out in the appended set of claims. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions in embodiments of the present disclosure, the drawings used in the embodiments of the present disclosure will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present disclosure. Based on these drawings, other drawings may be obtained by those skilled in the art without any creative work. Fig.1 is a first flowchart illustrating an information processing method provided in an embodiment of the present disclosure;Fig.2 is a second flowchart illustrating an information processing method provided in an embodiment of the present disclosure;Fig.3 is a third flowchart illustrating an information processing method provided in an embodiment of the present disclosure;Fig.4 is a schematic diagram of a network architecture of bearer-splitting for a sidelink interface provided in an embodiment of the present disclosure;Fig.5 is a fourth flowchart illustrating an information processing method provided in an embodiment of the present disclosure;Fig.6 is a fifth flowchart illustrating an information processing method provided in an embodiment of the present disclosure;Fig.7 is a schematic diagram illustrating a format of a MAC CE provided in an embodiment of the present disclosure;Fig.8 is a sixth flowchart illustrating an information processing method provided in an embodiment of the present disclosure;Fig.9 is a schematic diagram illustrating a method of indicating a PDCP entity number provided in an embodiment of the present disclosure;Fig.10 is a seventh flowchart illustrating an information processing method provided in an embodiment of the present disclosure;Fig.11 is a first schematic diagram of an information processing apparatus provided in an embodiment of the present disclosure;Fig.12 is a second schematic diagram of an information processing apparatus provided in an embodiment of the present disclosure;Fig.13 is a third schematic diagram of an information processing apparatus provided in an embodiment of the present disclosure;Fig.14 is a schematic diagram of a transmission terminal provided in an embodiment of the present disclosure;Fig.15 is a schematic diagram of a reception terminal provided in an embodiment of the present disclosure;Fig.16 is a schematic diagram of a network-side device provided in an embodiment of the present disclosure