Method executed by user equipment and user equipment

A technology of user equipment and timers, applied in communication between vehicles and infrastructure, using return channels for error prevention/detection, services based on specific environments, etc., can solve problems such as TXUE transmission restrictions

Pending Publication Date: 2022-01-25
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, in order to ensure that the RX UE can receive correctly, there are also restrictions on the transmission of the TX UE

Method used

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  • Method executed by user equipment and user equipment
  • Method executed by user equipment and user equipment
  • Method executed by user equipment and user equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In sidelink transmission, according to whether HARQ-ACK information needs to be sent, RX UE has two working modes:

[0049] Mode 1 needs to send HARQ-ACK information through PSFCH after receiving PSSCH, that is, HARQ feedback is required; mode 2 does not need to send HARQ-ACK information after receiving PSSCH, that is, HARQ feedback is not required.

[0050] As an example, figure 1 It is a schematic diagram showing the processing flow of Embodiment 1 of the present disclosure.

[0051] The RX UE can maintain the effective time of discontinuous reception according to the above-mentioned different working modes, including:

[0052] Define a timer T-active, which can be started periodically, and the start period or the interval between two starts can be called DRX Cycle.

[0053] Such as figure 1 As shown, in step S1, the UE monitors the PSCCH (monitorPSCCH) during the running of the timer T-active. Wherein, monitoring the PSCCH may mean that the UE receives the first-...

Embodiment 2

[0067] Hereinafter, Example 2 of the present disclosure will be described. The difference between embodiment 2 and embodiment 1 is that the duration of T1-rtt and T2-rtt in embodiment 1 can be set to zero. As an example, figure 2 It is a schematic diagram showing the processing flow of Example 2 of the present disclosure. Such as figure 2 As shown, the specific processing flow in Embodiment 2 is as follows.

[0068] Define a timer T-active, which can be started periodically, and the start period or the interval between two starts can be called DRX Cycle.

[0069] exist figure 2 In step S1, the UE monitors the PSCCH during the running of the timer T-active.

[0070] In step S2, the UE judges whether to perform HARQ feedback based on the received SCI information. Specific processing can be performed, for example, as follows.

[0071] In one case, the SCI indicates enabling (enable) HARQ feedback, or indicates that HARQ-ACK information needs to be sent, that is, the SCI...

Embodiment 3

[0076] Hereinafter, Embodiment 3 of the present disclosure will be described in detail. In Embodiment 1-2, the active period of the receiving UE is defined, and various timers run to maintain such an active period. From the perspective of the sending UE, the same ACTIVE time can be defined. For a sidelink connection, or for a pair of source and destination address (a pair of source and destination address), the TX UE sends the corresponding ACTIVE TIME during its corresponding Information / data corresponding to (or belonging to) the connection, or sending information / data corresponding to (or belonging to) the group address, specifically, PSCCH and PSSCH carrying information / data; and during the ACTIVE time, receiving the corresponding PSFCH for the connection or group address.

[0077] TX UE is allowed to send PSCCH and optionally also send PSSCH and receive PSFCH during the running of timer T-active;

[0078] When the TX UE sends SCI, start the timer T-inactive;

[0079] I...

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Abstract

The invention provides a method executed by user equipment and the user equipment. The method executed by the UE comprises the following steps: enabling the UE to monitor a physical sidelink control channel (PSCCH) and receive sidelink control information (SCI) during the running period of a periodically started timer T-active; starting a timer T1-retx under the condition that the received SCI information indicates to carry out HARQ feedback; under the condition that the received SCI information indicates that HARQ feedback is not carried out, starting a timer T2-retx; and during the operation period of the timer T1-retx and the timer T2-retx, enabling the UE to monitor the PSCCH.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and more specifically, the present invention relates to a method executed by user equipment and corresponding user equipment. Background technique [0002] Vehicle to Everything (V2X) is a new generation of information and communication technology that connects vehicles to everything. V stands for vehicles, and X stands for any object that interacts with vehicles. Currently, X mainly includes vehicles, people, and traffic. Roadside infrastructure and networks. [0003] In a pair of UEs performing V2X service communication, according to the classification of sending and receiving, it can be divided into sending UE (TX UE) and receiving UE (RX UE). Since the sending UE is not always sending information, in order to save energy for the receiving UE, the receiving UE may be set to a discontinuous reception mode (Discontinue Recption, DRX), that is, the receiving UE monitors th...

Claims

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Application Information

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IPC IPC(8): H04W4/44H04W4/70H04W72/04H04W72/12H04L1/18
CPCH04W4/70H04W4/44H04W72/0446H04W72/0453H04L1/1812H04W72/535H04W92/18H04L1/1851H04L1/1896H04L1/1848H04W72/25
Inventor 张崇铭刘仁茂山田升平
Owner SHARP KK
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