Transmission method and device

A technology of transmission method and scheme, which is applied in the field of communication to achieve the effect of reducing the number of blind detections and reducing overhead

Inactive Publication Date: 2018-02-23
BEIJING XINWEI TELECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a transmission method and device to at least solve the problems

Method used

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  • Transmission method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0160] A given V2X resource pool has a bandwidth of 50 RBs, and the frequency domain in the resource pool is divided into 4 frequency-divided sub-channels, and all sub-frames in the time domain use the same division scheme. In this scenario, the typical size of the V2X control message in the frequency domain is 2 RBs.

[0161] Allocation scheme 1: The sub-channel bandwidth is allocated in a quasi-equal manner.

[0162] The reference bandwidth of sub-channels 1-4 is floor(50 / 4)=12 RBs. The total adjustment bandwidth is 50 mod 4 = 2 RBs. Resource pools do not allow subchannels to overlap. The number of control channels on each sub-channel is 1, and there is no overlap, so each sub-channel is treated equally when allocating and adjusting the bandwidth. The edge positions of the frequency domain of the two sub-channels located at the edge of the frequency domain of the resource pool in the system are both control channels, and there is no overlap between the sub-channels. Prior...

Embodiment 2

[0176] The preset sub-channel configuration scheme on the base station side includes: the channel bandwidth is 50 RB, the number of sub-channels is 3, and the scenario is a highway, a configuration type; the channel bandwidth is 50 RB, the number of sub-channels is 4, and the scenario is For highways, one configuration type; when the channel bandwidth is 50 RB, the number of sub-channels is 3, and the scene is an urban area, there are two configuration types; the channel bandwidth is 50 RB, the number of sub-channels is 4, and the scene is an urban area, Two configuration types;

[0177] The base station and the terminal each obtain the current scene as an urban area according to the high-level configuration; the terminal sends a transmission request to the base station, and the base station uses an RRC unicast message to send permission and resource pool information to the terminal configuration, and declares in the message that the frequency domain bandwidth of the resource p...

Embodiment 3

[0179]The base station side changes the sub-channel division scheme of the resource pool, and notifies all terminals through the SIB message broadcast. The content declared in the broadcast includes: the channel bandwidth is 50 RB; the number of sub-channels is 3; the starting position of the first sub-channel is RB0, the starting position of the second sub-channel is RB15, the starting position of the third sub-channel is RB30; the control channel of the first sub-channel is RB0-RB1, and the control channel position of the second sub-channel is bottom. The terminal obtains that sub-channel 1 uses RB0~RB14, among which the control channel is RB0~RB1, and the rest are data channels; sub-channel 2 uses RB15~RB29, and the preset bottom type is the last 2 RBs, so the control channel is RB28~ RB29, and the rest are data channels; sub-channel 3 uses RB30~RB49, and if the control / data channel is not declared, the preset control channel position is the first 2 RBs, then the control cha...

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Abstract

The invention discloses a transmission method and device. The method comprises the following steps: selecting one or more sub-channels on some sub-frame in a resource pool, wherein the resource pool is divided into multiple frequency-divided sub-channels, and all sub-frames on the time domain use the same division scheme, or each of all sub-frames on the time domain uses the independent division scheme and different sub-frames are allowed to use different division schemes; and performing the transmission in one or more selected sub-channels. Through the transmission method disclosed by the invention, a problem caused by a situation that a control message is transmitted by randomly selecting the resource in the existing resource pool is solved, the blind test time is reduced to a certain degree, and the overhead is lowered.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a transmission method and device. Background technique [0002] At present, in V2X communication, service messages are usually sent in a certain resource pool associated with the service type. The sender node selects control resources and data resources for sending control messages and data messages, and declares the data message in the control message. The location and other information required for demodulation, the receiving end node conducts blind detection on the possible control resource location, if a control message can be successfully decoded, then the data resource location declared in the message is intercepted and decoded. [0003] In the current common resource pool configuration scheme, one scheme is to allow control messages and data messages to be sent in the same or different subframes, and when control and data messages are sent in the same subframe, the contr...

Claims

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Application Information

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IPC IPC(8): H04L5/00
CPCH04L5/003
Inventor 周淼王夏男孙鹏
Owner BEIJING XINWEI TELECOM TECH
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