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Data transmission method and device

A technology for transmitting data and equipment, which is applied in the field of wireless communication systems, and can solve problems affecting prediction performance, etc.

Active Publication Date: 2018-02-06
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the V2X service is not strictly periodic, the message periods of different devices may also be different within a period of time, which will affect the prediction performance of the energy-based detection method

Method used

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  • Data transmission method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104]For a device A, when it occupies K resources, K is greater than or equal to 1, and the periods of these resources may be the same. For a device A, when it occupies K resources, it is also possible to allow periods of the K resources to be different or not completely the same. For example, device A occupies K1 resources, and its repetition period is P1; and occupies K2 resources, and its repetition period is P2, where K1 and K2 are greater than or equal to 1, the sum of K1 and K2 is equal to K, and P1 and P2 are not equal.

[0105] The timing at which device A performs selection / reselection of the aforementioned K resources may be common, that is, when device A performs resource selection / reselection, device A will select / reselect all K resources. Assume that device A occupies resources in a period P, and occupies resources of K subframes in one period, for example, transmits one data K times in one period, and after selecting K resources in one period, all K resources T...

Embodiment 2

[0146] Assume that a device occupies resources in a period P, and occupies resources of K subframes in one period, for example, transmits one piece of data K times in one period. That is, K resources are allocated to the above-mentioned devices, and each resource is allocated periodically at a period P. After the above-mentioned device selects a certain resource and occupies it for several cycles, it releases the resource and executes resource selection again. In addition, when the above-mentioned device detects a collision, that is, by receiving the SAs of other devices, the above-mentioned device finds that a correctly decoded SA schedules a subframe / subband that conflicts with its own data channel resources, in some cases, Can also trigger resource reelection.

[0147] In order to support effective resource selection / reselection, device A needs to detect the channel within a detection window before the subframe n in which resource selection / reselection is performed, and th...

Embodiment 3

[0161] Assume that a device occupies resources in a period P, and occupies resources of K subframes in one period, for example, transmits one piece of data K times in one period. That is, K resources are allocated to the above-mentioned devices, and each resource is allocated periodically at a period P. After the above-mentioned device selects a certain resource and occupies it for several cycles, it releases the resource and executes resource selection again. In addition, resource reselection can also be triggered in other situations.

[0162] For a device A, it first sends an SA, which indicates occupied data channel resources and other parameters used to control data transmission. The above parameters may include one or more of the following parameters:

[0163] The modulation and coding scheme (MCS) of data transmission, combined with the MCS and the number of occupied PRBs, the transmitted transmission block size (TBS) can be obtained;

[0164] Scheduling business prio...

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Abstract

The present invention provides a data transmission method. The method comprises the following steps that: a first device detects the SA (Scheduling Assignment) and received power of other devices, and / or the total received energy of each subframe / subband of the first device is detected; and the first device performs resource selection or reselection according to a detection result; and the first device performs data transmission on resources. The present invention also provides a data transmission device. With the data transmission method and device of the invention adopted, optimal resourcescan be selected for data transmission, and therefore, the impact of collision on the data transmission can be avoided; and the operating status of a system can be adjusted in a case of congestion, andtherefore, the performance of the system can be improved as much as possible.

Description

technical field [0001] The present invention relates to wireless communication system technology, in particular to a method and device for selecting or reselecting resources in an LTE D2D / V2X system to transmit data. Background technique [0002] At present, the device-to-device (D2D) communication technology has been accepted by the 3GPP standard due to its great potential value in the field of public safety and ordinary civilian communication, and some functions have been standardized in 3GPP Rel-12 , including the mutual discovery of D2D terminals in the cell coverage scenario and the D2D terminals in the cell coverage (In Coverage, IC) scenario, the cell partial coverage (Partial Coverage, PC) scenario and the no cell coverage (Out of Coverage, OC) scenario broadcast communication between. [0003] Currently, the 3GPP Rel-12 standard defines two modes of D2D broadcast communication, referred to as Mode 1 (Mode 1) and Mode 2 (Mode 2) for short. in: [0004] Mode 1 requ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W24/10H04W28/04H04W72/04H04W72/12
CPCH04W24/10H04W72/1221H04W72/53H04W72/542H04W72/02H04W24/08H04W72/0446
Inventor 李迎阳张世昌王轶
Owner BEIJING SAMSUNG TELECOM R&D CENT
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