A distributed transmission resource mapping method based on OFDM system

A distributed transmission, orthogonal frequency division technology, applied in orthogonal multiplexing systems, diversity/multi-antenna systems, frequency diversity and other directions, can solve problems such as poor filling efficiency, large signaling overhead, and changes, etc. Achieve the effect of low complexity, good support for continuous scheduling service types, and low signaling overhead

Inactive Publication Date: 2008-01-09
ZTE CORP
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Problems solved by technology

[0004] The currently commonly used DVRB-DPRB mapping method is to pre-determine the position of DPRB in the entire system bandwidth according to the system bandwidth or the total number of DPRB, and the base station indicates the distribution of DPRB and its subcarriers allocated to users through control signaling. The disadvantage is that the DVRB-DPRB mapping process changes with the total number of DPRBs or the system bandwidth, that is to say, once the parameters change, the position of the corresponding DPRB in the system bandwidth may also change
Although the base station can dynamically send the DPRB number information to each user performing distributed transmission, this will cause a large signaling overhead. If the DPRB number information is sent in a semi-static way, the filling efficiency will be very high. In addition, for users performing persistent scheduling (or semi-persistent scheduling) services, it is not allowed to change the physical resources used for data transmission during the transmission process, so the change of the mapping position of DPRB that may be caused by the existing technology is Not conducive to supporting continuous scheduling business

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  • A distributed transmission resource mapping method based on OFDM system
  • A distributed transmission resource mapping method based on OFDM system

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] The present invention proposes an effective DVRB-to-DPRB mapping method, and establishes a mapping relationship between each distributed virtual resource block DVRB logic number and a physical resource block PRB logic number, and the base station and the receiver store the mapping relationship, and the mapping relationship can be It can be a dynamic configuration, a semi-static configuration, or a static configuration; when transmission resources are needed, the base station first adopts a dynamic, semi-static, or static method corresponding to the configuration method of the mapping relationship for the parameters of the mapping relationship Send to the receiver, and then send the DVRB logic number to be mapped to the receiver, and the receiver obtains corresponding physical resource allocation information according to the mapping rela...

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Abstract

The invention is concerned with the distributing source transmitting mapping method of the direct cross frequency division multiplexing (FDM) system. It is to develop the mapping relation of the each distributing dummy source piece logical mark with the physical source piece logical mark, and it can be storing by the station and the receiver; the station can send the mapped requested dummy sourcepiece logical mark to the receiver when source transmission demand, and the receiver can obtain the opposite physical source distribution information through the mapping relation.

Description

technical field [0001] The present invention relates to a broadband wireless communication system, in particular to a distributed transmission resource mapping method based on an OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) system. Background technique [0002] OFDM technology is one of the main candidates for future wireless communication technology. OFDM technology divides a given channel into many orthogonal subcarriers in the frequency domain, modulates signals on each subcarrier separately, and transmits each subcarrier in parallel. In this way, although the frequency response curve of the wireless channel is non-flat and has frequency selectivity, the frequency response within each subcarrier is relatively flat, and what is carried out on each subcarrier is narrowband transmission, and the signal bandwidth is smaller than the channel bandwidth, so it can Greatly eliminate the interference between signal waveforms. Sinc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/12H04J11/00
Inventor 田刚戴博张禹强
Owner ZTE CORP
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