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Transmission method and device

A technology of a transmission method and a transmission device, which is applied in the field of communication and can solve problems such as low data transmission reliability and large transmission delay

Active Publication Date: 2018-10-09
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing V2X of LTE Rel-14, the time granularity of the resources occupied by sending data is LTEnormal subframe (1ms), which will lead to low reliability of data transmission and large transmission delay

Method used

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  • Transmission method and device
  • Transmission method and device

Examples

Experimental program
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Embodiment 1

[0186] Embodiment 1: The subframe structure of Symbol-level TTI is as follows, wherein considering the influence of AGC and GP, the structure of its short subframe can be as follows Figure 11 As shown, one normal subframe (subframe) can be divided into 4 short subframes, and the OFDM symbols occupied respectively are {4, 3, 3, 4}.

Embodiment 2

[0187] Example 2: Figure 12 A new physical channel format physical layer format based on normal subframe is further given. The New SAregion can be used for New SA information adopting a new transmission scheme, or new New SA information incompatible with legacy SA.

[0188] In the embodiment of the present invention, in the scenario where New SA and legacy SA coexist, the location of the New SA resource can be any location in the Data resource, and the above-mentioned DMRS truncation method can be used, Figure 13 An example of a New SA located at the end of the data frequency domain resource is given in .

Embodiment 3

[0189] Embodiment 3: Considering that the New UE adopts a multi-antenna transmit diversity technical solution to improve transmission reliability, for example, the case of 2-antenna ports, where the DMRS can be differentiated by different sequences. Such as Figures 14a-14b shown. The sequence generated by one of the DMRS ports (for example, V2X DMRS port 0) may follow the method of the embodiment of the present invention, so that the DMRS sequence of one DMRS port is a truncated legacy DMRS sequence.

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Abstract

The embodiment of the invention provides a transmission method and device. The transmission method comprises the steps that a transmitting terminal determines first SA (Scheduling Assignment) information and first data required to be transmitted, wherein the first SA information at least includes indication information of a DMRS (Demodulation Reference Signal) sequence for first data demodulation;and the transmitting terminal transmits the first SA information according to a first physical layer format and transmits the first data according to a second physical layer format. The first physical layer format for transmitting the first SA information and the second physical layer format for transmitting the first data can choose a transmission format capable of supporting a shorter subframelength, such as a transmission format of slot-level TTI (Transmission Time Interval) or a transmission format of OFDM (Orthogonal Frequency Division Multiplexing) symbol-level TTI, so that the reliability of data transmission is effectively improved, and the delay of transmission is reduced.

Description

technical field [0001] The present invention relates to the technical field of communication, and in particular to a terminal-to-terminal transmission method and device in the Internet of Vehicles. Background technique [0002] In the existing LTE (Long Term Evolution, long-term evolution) Rel-14V2X (Vehicle to Everything, vehicle to everything) technology, the time granularity of resources occupied by sending data is LTE normal subframe (1ms), due to the V2X technology Evolution needs to support shorter processing delays and provide higher reliability, so it is necessary to introduce shorter subframe lengths in time, for example: OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) symbol level or slot (0.5ms, equivalent to half a subframe) level subframe length. [0003] In the existing V2X of LTE Rel-14, the legacy UE (legacy terminal) needs to receive the SA (Scheduling Assignment, scheduling assignment) information and the DMRS ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00
CPCH04L1/0006H04L1/0023H04L5/0094H04L5/0007H04L5/0051H04W72/21H04W4/40H04L1/0007H04L5/0048H04W72/12
Inventor 赵锐潘学明彭莹
Owner DATANG MOBILE COMM EQUIP CO LTD