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Method, apparatus and communication system for obtaining and sending channel quality feedback information

A technology of quality feedback information and channel quality, which is applied in the direction of link quality-based transmission modification, wireless communication, transmission link error control system, etc. MCS order adjustment and other issues

Active Publication Date: 2014-12-31
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical solutions in the prior art do not take into account the channel quality feedback of MBS users when the channel quality is good. Therefore, if the channel quality of MBS users is good, the MCS order cannot be adjusted to a higher level, thereby Cannot make full use of the channel, which leads to the inability to accurately know the distribution of MBS users by using the existing technology

Method used

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  • Method, apparatus and communication system for obtaining and sending channel quality feedback information
  • Method, apparatus and communication system for obtaining and sending channel quality feedback information
  • Method, apparatus and communication system for obtaining and sending channel quality feedback information

Examples

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Embodiment 1

[0035] In order to accurately know the distribution of MBS users, that is, the channel quality information of MBS users, such as figure 1 As shown, Embodiment 1 of the present invention provides a method for obtaining channel quality feedback information, including the following steps:

[0036] Step 11, acquiring channel feedback parameters.

[0037] In Embodiment 1 of the present invention, channel feedback parameters may be acquired by means for acquiring channel quality feedback information, and the means for acquiring channel quality feedback information may be located in a base station or in other devices. In the following, a base station will be used as an example for description.

[0038] Step 12. The base station divides the user channel quality into at least three user channel quality sets according to the channel feedback parameters. Wherein, the user is a multicast broadcast service user, and the multicast broadcast service user may also be called a multicast serv...

Embodiment 2

[0049] Such as image 3 As shown, Embodiment 2 of the present invention provides a method for sending channel quality feedback information, including the following steps:

[0050] Step 21. Obtain channel feedback parameters, and determine channel quality set division information of multicast broadcast service users according to the channel feedback parameters.

[0051] In this embodiment, various information can be obtained by the device for obtaining channel quality feedback information, and the device for obtaining channel quality feedback information can be located in the MBS user terminal, and of course it can also be located in other user terminals, hereinafter referred to as MBS user terminal Examples are described.

[0052] Same as described in Embodiment 1, the channel feedback parameters may include a feedback threshold CQI_Threshold and a step size Step. The MBS user terminal may obtain channel feedback parameters in at least the following two ways: receiving chann...

Embodiment 3

[0063] In the third embodiment, the base station sends the channel feedback parameter to the MBS user by broadcasting. include:

[0064] Step 31, the base station sets the CQI of the worst channel quality as the feedback threshold value CQI_Threshold according to the initial CQI of each MBS user, sets the step size Step=3dB, and broadcasts the feedback threshold value and step size Sent to each MBS user.

[0065] Step 32. According to the method described in the first embodiment, the base station divides the channel quality of each MBS user into three user channel quality sets according to the feedback threshold value and the step size.

[0066] Step 33: Each MBS user determines the user set to which it belongs according to the relationship between its CQI and user channel quality set division, and sends channel quality feedback information to the base station respectively.

[0067] The MBS users in the first set send the first channel quality feedback information to the bas...

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Abstract

The embodiments of the invention disclose a method, apparatus and communication system for obtaining and sending channel quality feedback information. Wherein the method for obtaining channel quality feedback information comprises: obtaining channel feedback parameters; dividing channel quality of Multi-cast Broadcast Service (MBS) users into at least three user channel quality sets according to the channel feedback parameters; receiving channel quality feedback information sent by MBS users of the user channel quality sets respectively, and obtaining the distribution state of MBS users. The embodiments of the invention are able to determine the distribution state of MBS users exactly according to the channel quality feedback information.

Description

technical field [0001] The present invention relates to the technical field of communication, in particular to a method, device and communication system for acquiring and sending channel quality feedback information. Background technique [0002] In order to effectively utilize mobile network resources, WiMAX (Worldwide Interoperability for Microwave Access, Worldwide Interoperability for Microwave Access) defines an MBS (Multi-cast Broadcast Service, multicast broadcast service) service. The MBS service is a point-to-multipoint service that provides a data source to send data to multiple users in a mobile network, which realizes network resource sharing and improves network resource utilization. [0003] But for the MBS service, since the base station (Base Station, BS) does not require the MBS user to feed back the channel quality CQI (Channel Quality Index, channel quality indicator), therefore, the base station or the network cannot dynamically change the modulation and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W28/04
CPCH04L2001/0093H04L1/0028H04W72/005H04W72/30
Inventor 曾云宝杜颖钢
Owner HUAWEI TECH CO LTD