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Resource mapping method and resource mapping device of control channels in communication system

A communication system and control channel technology, applied in the field of resource mapping of control channels, can solve the problems of complex mapping process, increasing the difficulty of control channel design, and high complexity of control channel in wireless communication systems

Inactive Publication Date: 2013-06-26
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The increase in the complexity of the wireless communication system leads to a higher complexity of the control channel, especially in the wireless communication system based on OFDMA technology, the wireless resource is a two-dimensional time-frequency resource composed of OFDMA symbols in the time domain and subcarriers in the frequency domain , its resource mapping needs to be carried out in the time domain and frequency domain, and the mapping process is more complicated, which increases the difficulty of designing the control channel in the wireless communication system based on OFDMA technology

Method used

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  • Resource mapping method and resource mapping device of control channels in communication system
  • Resource mapping method and resource mapping device of control channels in communication system
  • Resource mapping method and resource mapping device of control channels in communication system

Examples

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Embodiment 1

[0073] According to an embodiment of the present invention, a resource mapping method of a control channel is provided.

[0074] Figure 4 is a flow chart of a resource mapping method for a control channel according to an embodiment of the present invention, such as Figure 4 As shown, the method includes the following steps (step S402 to step S404)

[0075] Step S402, the resource mapping process of the subframe where the broadcast control channel is located is different from the resource mapping process of the subframe where the non-broadcast control channel is located, wherein the number of OFDMA symbols contained in the subframe where the broadcast control channel is located is determined by the length of the cyclic prefix used by the communication system Sure. Here, the non-broadcast control channel is a control channel other than the broadcast control channel. Specifically, the resource mapping process of the subframe where the broadcast control channel is located can ...

example 1

[0088] Figure 5 Describes the resource mapping process of the subframe where the non-broadcast control channel of the 5MHz OFDMA system is located, such as Figure 4 As shown, the number of FFT points of the 5MHz system is 512, and the available data subcarriers in a subframe are 432, which are divided into N (=24) physical resource units (Physical Resource Unit, PRU for short), each with a size of 18x6, That is, there are 18 carriers in the frequency domain and 6 OFDMA symbols in the time domain. Due to the cyclic prefix and the control channel, the number of OFDMA symbols in the time domain may be 5 or 7.

[0089] First divide 24 physical resource units into multiple Subbands (subbands), each Subband contains consecutive N1 physical resource units, for example, N1=4, then there are 6 Subbands, replace the Subband or select K from the Subband at regular intervals SB Subband, for example, K SB=3, use row and column replacement, the replacement matrix is ​​[0, 1; 2, 3; 4, 5]...

example 2

[0098] Image 6 A schematic diagram of the resource mapping process 1 of the subframe where the broadcast control channel is located in the 5MHz OFDMA system according to the embodiment of the present invention is described, as shown in Figure 5 As shown, the number of FFT points of the 5MHz system is 512, and the available data subcarriers in a subframe are 432, which are divided into N (=24) PRUs, and each PRU has a size of 18xNs, that is, there are 18 carriers in the frequency domain and 18 carriers in the time domain. There are Ns OFDMA symbols. Due to the cyclic prefix and the control channel, the number of OFDMA symbols occupied by the broadcast control channel in the time domain can only be 5 or 6.

[0099] First, select or extract a certain number (for example, k) of physical resource units from both sides of the 24 physical resource units. One or a combination of frequency modes, or the number can be flexibly set as required. Afterwards, the k physical resource uni...

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Abstract

The invention discloses a resource mapping method and a resource mapping device of control channels in a communication system. The method includes that a resource mapping process of sub-frames of broadcast control channels is different from a resource mapping process of sub-frames of non-broadcast control channels; and the resource mapping process of the sub-frames of the non-broadcast control channels is indicated through control information of the broadcast control channels. According to the technical scheme, problems of where and how synchronizing channels and the broadcasting control channels occupying resources are solved; processes of identifying the broadcast control channels by terminals are simplified; and spectrum effectiveness of a wireless communication system based on the OFDMA (orthogonal frequency division multiple access) technology is guaranteed.

Description

[0001] The present invention is a divisional application of the invention patent with the filing date: February 16, 2009, the application number: 200910004180.X, and the invention title: "Method and Device for Resource Mapping of Control Channel in Communication System". technical field [0002] The present invention relates to the communication field, in particular to a resource mapping method and device for a control channel in a communication system. Background technique [0003] Orthogonal Frequency Division Multiplexing (OFDM for short) technology is a high-speed transmission technology in a wireless environment, which improves performance against multipath fading by extending the pulse width of OFDMA symbols. The realization principle of OFDM technology is: convert high-speed serial data into multiple relatively low-speed parallel data, and modulate the multiple parallel data onto mutually orthogonal sub-carriers for transmission. Orthogonal Frequency Division Multiple...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04W72/04
Inventor 关艳峰夏薇方惠英刘颖
Owner ZTE CORP
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