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Combined processing method for route selection and sub-channel distribution in relay system

A technology of channel allocation and relay system, which is applied in the direction of radio/inductive link selection arrangement, transmission system, selection device, etc., and can solve the problem of high signaling overhead

Inactive Publication Date: 2009-03-25
ZTE CORP
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Problems solved by technology

[0011] Moreover, in conventional route selection and sub-channel allocation, user terminals and candidate relay stations need to feed back channel quality information to the base station, such as CQI (Channel Quality Indication) on each sub-channel. When the number of sub-channels is very large, this The signaling overhead of CQI feedback is very large

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  • Combined processing method for route selection and sub-channel distribution in relay system
  • Combined processing method for route selection and sub-channel distribution in relay system

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Embodiment Construction

[0052] In order to solve the disadvantages of the traditional technical solution, the present invention further elaborates the joint processing method of routing selection and sub-channel allocation in an OFDMA relay system according to the present invention through the following specific examples. The specific implementation will be described in detail below, but It is not intended to limit the invention.

[0053] The present invention designs routing selection and sub-channel allocation for the TDD system. The routing selection here refers to which relay station is selected as the target relay station RS_R to realize the relay function between the user terminal and the base station. Sub-channel allocation refers to the sub-channels used when allocating data transmission for the access link and relay link corresponding to the target relay station, so that the target relay station can realize the transmission from the user terminal to the base station or from the base station t...

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Abstract

The invention discloses a method for the combined treatment of routing and sub-channel assignment in an orthogonal frequency division multiplexing (OFDM) multiple access relay system. The method comprises the following steps: (1) a UT sends the bandwidth request and the channel measuring signal to an adjacent RS; (2) each RS selects a target sub-channel set on an RS-UT link, and reports the information to a BS; (3) the BS selects a corresponding RS on the RS-UT link, and reckons the RS in an RS set to be selected; (4) the BS selects an RS with the least elements of the sub-channel set from the RS set as a target relay station RS_R, and assigns sub-channels for links respectively; and (5) the BS informs the target relay station RS_R of the related information; and the target relay station RS_R analyzes the information and informs the UT and transmits the feedback to the BS. The invention takes the channel condition among the relay station, the user terminal and a base station into comprehensive consideration, wherein the relay station selection and the sub-channel assignment are interdependent, therefore, the adaptive capacity of the selected target relay station is improved.

Description

technical field [0001] The present invention relates to the field of cellular mobile communication systems, in particular to a joint processing method for route selection and subchannel allocation in an Orthogonal Frequency Division Multiple Access (OFDMA) relay system. Background technique [0002] With the commercialization of 3G systems, B3G / 4G technologies with higher speed, higher spectrum efficiency, higher coverage and stronger service support capabilities have entered the standardization stage. ITU plans to complete the B3G spectrum planning in 2007, and in 2010 The main standards were completed in 2012, commercial use began in 2012, and large-scale commercial use began in 2015. B3G / 4G requires that the transmission rate can reach 1Gbps, and the required spectrum is at least 100MHz. It is difficult to find such broadband spectrum requirements in existing frequency bands, so a higher frequency band, such as 5GHz or 6GHz, needs to be allocated to B3G / 4G. [0003] Alt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04Q7/30H04L1/00H04L27/26
Inventor 蒋小奎
Owner ZTE CORP
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