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EP-3861814-B1 - METHODS AND APPARATUS FOR SIDELINK COMMUNICATIONS CONFIGURATION

EP3861814B1EP 3861814 B1EP3861814 B1EP 3861814B1EP-3861814-B1

Inventors

  • ABDOLI, Javad
  • CAO, YU
  • MAAREF, AMINE
  • TANG, ZHENFEI

Dates

Publication Date
20260513
Application Date
20191025

Claims (13)

  1. A method comprising: obtaining (704), by a communication terminal, a sidelink, SL, bandwidth part, BWP, configuration for indicating a frequency range of an SL BWP; and transmitting (810, 814, 830), by the communication terminal, a SL data transmission in a Physical Sidelink Shared Channel, PSSCH, within a resource pool within a common SL BWP to a second communication terminal according to the SL BWP configuration, wherein the SL BWP configuration is separate from an uplink, UL, or downlink, DL, BWP configuration to be used by the communication terminal for communications with a network equipment in a communication network, wherein the frequency range of the SL BWP is different from a frequency range of a UL or DL BWP indicated by the UL or DL BWP configuration, and wherein the SL BWP configuration comprises a common SL BWP configuration to be used for SL data communications by a plurality of communication terminals, the plurality of communication terminals including the communication terminal.
  2. The method of claim 1, wherein the SL BWP comprises a BWP configured within a shared carrier spectrum in which communication resources for the communications with the network equipment in the communication network are configured.
  3. The method of claim 2, wherein the SL BWP is disjoint from the communication resources for the communications with the network equipment in the communication network; or wherein the SL BWP at least partially overlaps the communication resources for the communications with the network equipment in the communication network.
  4. The method of any one of claims 1 to 3, wherein the SL BWP configuration is based on SL BWP configuration information that is received by the communication terminal to configure or reconfigure the SL BWP configuration.
  5. The method of any one of claims 1 to 4, wherein the obtaining step comprises: obtaining, by the communication terminal, an SL preconfiguration as the SL configuration, wherein the obtained SL preconfiguration comprises any one of the following: an SL configuration preconfigured in the communication terminal prior to deployment of the communication terminal; an SL configuration preconfigured in the communication terminal by download or plugin; an SL configuration preconfigured in the communication terminal by a network entity in the communication network prior to the communication terminal becoming out of coverage; an SL configuration forwarded to the communication terminal directly by another communication terminal; or a common or initial SL configuration preconfigured in the communication terminal.
  6. The method of any one of claims 1 to 5, wherein the SL BWP configuration further comprises an SL communication resource configuration within the SL BWP, wherein the SL communication resource configuration comprises one or more resource pools.
  7. A communication terminal comprising: a processor (200); and a non-transitory computer readable storage medium (208) storing programming for execution by the processor, the programming including instructions to: obtain (704) a sidelink, SL, bandwidth part, BWP, configuration for indicating a frequency range of an SL BWP; and transmitting (810, 814, 830) a SL data transmission in a Physical Sidelink Shared Channel, PSSCH, within a resource pool within a common SL BWP to a second communication terminal according to the SL BWP configuration, wherein the SL BWP configuration is separate from an uplink, UL, or downlink, DL, BWP configuration to be used by the communication terminal for communications with a network equipment in a communication network, wherein the frequency range of the SL BWP is different from a frequency range of a UL or DL BWP indicated by the UL or DL BWP configuration, and wherein the SL BWP configuration comprises a common SL BWP configuration to be used for SL data communications by a plurality of communication terminals, the plurality of communication terminals including the communication terminal.
  8. The communication terminal of claim 7, wherein the SL BWP comprises a BWP configured within a shared carrier spectrum in which communication resources for the communications with the network equipment in the communication network are configured.
  9. The communication terminal of claim 8, wherein the SL BWP is disjoint from the communication resources for the communications with the network equipment in the communication network; or wherein the SL BWP at least partially overlaps the communication resources for the communications with the network equipment in the communication network.
  10. The communication terminal of any one of claims 7 to 9, wherein the SL BWP configuration is based on SL BWP configuration information that is received to configure or reconfigure the SL BWP configuration.
  11. The communication terminal of any one of claims 7 to 10, wherein the programming includes instructions to obtain the SL configuration by obtaining an SL preconfiguration as the SL configuration, wherein the obtained SL preconfiguration comprises any one of the following: an SL configuration preconfigured in the communication terminal prior to deployment of the communication terminal; an SL configuration preconfigured in the communication terminal by download or plugin; an SL configuration preconfigured in the communication terminal by a network entity in the communication network prior to the communication terminal becoming out of coverage; an SL configuration forwarded to the communication terminal directly by another communication terminal; or a common or initial SL configuration preconfigured in the communication terminal.
  12. The communication terminal of any one of claims 7 to 11, wherein the SL BWP configuration further comprises an SL communication resource configuration within the SL BWP, wherein the SL communication resource configuration comprises one or more resource pools.
  13. A computer program product comprising a non-transitory computer readable storage medium (208) storing programming, the programming including instructions that, when run by a processor, perform any method of claims 1 to 6.

Description

FIELD The application relates generally to wireless sidelink (SL) communications, and in particular embodiments, to configuration of sidelink communications. BACKGROUND One possible application of SL communications is vehicle to everything/anything (V2X) communication, for example, which is an increasingly important new category of communication that may become widespread in next generation wireless communication networks, such as 5G New Radio (NR) systems. V2X refers to a category of communication scenarios, including communication from a vehicle to another vehicle (V2V), vehicle to infrastructure (V2I), and vehicle to pedestrian (V2P), for example. In general, a vehicle communicating in a network is considered user equipment (UE) or a terminal. Communication in V2X systems may be performed using links between the network and the terminal, such as an uplink (UL) and a downlink (DL). The UL is a wireless communication link from a terminal to a base station (BS), and the DL is a wireless communication link from a BS to a terminal. In V2X communications using the UL and DL, data is transmitted from a transmitting terminal to a BS, and then transmitted from the BS to a receiving terminal. Alternatively, V2X communications may be performed between a transmitting terminal and a receiving terminal using a sidelink. The SL allows data to be transmitted directly from the transmitting terminal to the receiving terminal, without forwarding the data via the B S. Communication resources are required for UL, DL and SL communications. For example, a terminal could wirelessly transmit data to or receive data from another terminal using a particular frequency and during a particular time slot. The combination of frequency and time slot defines a communication resource in this example. An SL is an example of an air interface, which is the wireless communications link between two or more communicating devices, such as a radio access network device (e.g., a base station, a NodeB, an evolved NodeB, a transmit point) and an electronic device (e.g., a terminal such as a UE, a mobile phone, a sensor, a camera). Typically, both communicating devices need to know specific parameters of the air interface in order to successfully transmit and receive a transmission. The document "Sidelink physical layer structure and procedure for NR V2X" by Huawei et al. (3GPP draft; R1-1808093) provides an overview for sidelink physical layer structure and a procedure for NR V2X. Configuring the communicating devices with the same air interface parameters allows the communicating devices to reliably identify, organize and use physical resources, such as time, frequency, or time and frequency resources. Challenges in V2X communications, and more generally SL communications, include efficient configuration of terminals, to configure resources that are to be used for SL communications, for example. SUMMARY The invention is set out in the appended set of claims. BRIEF DESCRIPTION OF THE DRAWINGS For a more complete understanding of the present disclosure, and the advantages thereof, reference is now made to the following description taken in conjunction with the accompanying drawings, in which: Fig. 1 is a network diagram of a communication system.Fig. 2 is a block diagram of an air interface manager for configuring a software-configurable air interface.Fig. 2A is a block diagram of an example electronic device.Fig. 2B is a block diagram of an example electronic device.Fig. 3 is a block diagram illustrating air interfaces in an example communication system that supports V2X communications over an SL.Figs. 4A to 4C illustrate shared carrier SL bandwidth part (BWP) configuration examples.Fig. 4D illustrates a dedicated carrier SL BWP configuration example.Fig. 5 is a block diagram illustrating an example of resource pool configuration per SL BWP.Figs. 6A to 6C illustrate examples of common and terminal-specific SL BWPs and resource pools.Fig. 7 is a flow diagram illustrating an example method.Fig. 8A is a signal flow diagram illustrating signaling between network equipment and terminals for configuring and using common and terminal-specific RP(s) within a common SL BWP.Fig. 8B is a signal flow diagram illustrating signaling between network equipment and terminals for configuring and using common RP(s) within a common SL BWP and terminal-specific RP(s) within a terminal-specific SL BWP. The invention is described by the combination of the embodiments related to figures 4A, 4B, 4C, 4D, 7, 8A, and 8B. DETAILED DESCRIPTION For illustrative purposes, specific example embodiments will be explained in greater detail below in conjunction with the figures. It should be appreciated, however, that the present disclosure provides many applicable concepts that can be embodied in any of a wide variety of specific contexts. The specific embodiments discussed are merely illustrative and do not limit the scope of the present disclosure. Fig. 1 illustrates an example comm