Method for selecting transmission rate in cooperative diversity

A technology of transmission rate and cooperative diversity, applied in the direction of adjustment of transmission rate, transmission system, digital transmission system, etc., can solve problems such as large fluctuation range and performance loss, and achieve the effect of ensuring service reliability and optimizing service performance.

Inactive Publication Date: 2017-01-11
BEIJING XINWEI TELECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the fluctuation range of the actual achievable transmission rate in the cooperative diversity scheme is larger than that in the broadcasting business. If a fixed low-order MCS is used in the cooperative diversity scheme, it will lead to more obvious performance loss

Method used

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  • Method for selecting transmission rate in cooperative diversity
  • Method for selecting transmission rate in cooperative diversity
  • Method for selecting transmission rate in cooperative diversity

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Experimental program
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Embodiment 1

[0033] The topological diagram used in this embodiment is as follows figure 2 shown.

[0034] A. Node S is the source node and needs to send a service whose destination nodes are D1 and D2. This event triggers node S to start the rate training process.

[0035] Here, the system can also preconfigure a series of transmission rate values ​​for the nodes, and the node S can select an initial value for rate training from these preconfigured transmission rate values.

[0036] Assume that in the process:

[0037] - The standard for relay and sink nodes to perform feedback is that all sink nodes perform feedback;

[0038] ——The content of the feedback is to receive BLER, and the business requires to receive BLER<0.1%;

[0039] - The end of training is marked as reaching the maximum number of training times = 5 times;

[0040] B. The transmission rate value used by node S in the rate training process and the feedback obtained are as follows image 3 shown.

[0041] C. After com...

Embodiment 2

[0043] The topology used in this embodiment is as follows figure 2shown. Node S is the source node, and needs to send a service whose destination nodes are D1 and D2, and the reliability requirement is BLER<0.1%.

[0044] A. Node S first calculates the participating nodes of each hop in cooperative diversity at different transmission rates according to routing information and channel parameters, such as Figure 4 .

[0045] B. Node S calculates that the transmission rate to be adopted is 2.2 Mbps, and uses this rate as the initial transmission rate for rate training to trigger the rate training process.

[0046] Assume that in the process:

[0047] - The standard for relay and sink nodes to perform feedback is that all relay and sink nodes perform feedback;

[0048] ——The content of the feedback is to receive BLER, and the business requires to receive BLER<0.1%;

[0049] ——After the end of the training, the transmission rate of the training message used for the second ti...

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Abstract

The invention provides a method for selecting a transmission rate in cooperative diversity. The method comprises the following steps: sending a business message or a rate training message in a cooperative diversity mode to start rate training; receiving the receiving condition feedbacks of all or a part of receiving nodes; and adjusting the rate training transmission rate according to the feedback result and repeating the above-mentioned process, or ending the training or determining the transmission rate of a cooperative diversity task. By adoption of the method, the current communication rate can be determined according to different scenes and business types, so that the transmission rate of the system is adjustable, thereby guaranteeing the business reliability and optimizing the business performance.

Description

technical field [0001] The present invention relates to wireless communication, in particular to a method for selecting transmission rate in cooperative diversity. Background technique [0002] In a wireless network, when a source node needs to initiate a service to multiple sink nodes other than multi-hop, a common method is to transmit the service in the form of broadcast, that is, to form a multi-hop flood broadcast. In the multi-hop flood broadcast, the source node selects the communication rate, and the relay node does not change the received message and forwards it as it is, so it is equivalent to the source node needing to select the common communication rate of each hop in the entire broadcast process . Therefore, the typical way of broadcast flooding is to use a fixed low-order MCS. By selecting a low-order MCS, the reliability of service transmission in the broadcast communication process without feedback is improved, and the complexity of receiving and parsing br...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/06H04L1/00
CPCH04L1/0618H04L1/0002H04L1/001
Inventor 周淼孙鹏
Owner BEIJING XINWEI TELECOM TECH
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