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Data transmission method and apparatus

A data transmission method and technology of a transmission device are applied in the field of data transmission methods and transmission devices, and can solve the problems that only multiplexing mode 1 or multiplexing mode 2 can be used.

Inactive Publication Date: 2009-07-01
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art IEEE 802.16m standard, there is no method for multiplexing data transmission according to channel resources. If the channel resource multiplexing mode of the UMB protocol is used, the multiplexing mode is sent once every two superframes are sent through broadcast messages, and one Only multiplexing mode 1 or multiplexing mode 2 can be used in a superframe, so that if a frame or superframe is sent, channel resources cannot be flexibly configured within a frame or superframe for data transmission according to business needs and channel conditions

Method used

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  • Data transmission method and apparatus
  • Data transmission method and apparatus
  • Data transmission method and apparatus

Examples

Experimental program
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Embodiment 1

[0033] Taking the 5MHz transmission bandwidth as an example, refer to Table 1 for the system parameters in the IEEE 802.16m standard. There are 512 subcarriers in total, and 46 and 45 guard subcarriers (Guard Subcarrier) are reserved at the top and bottom respectively to isolate other frequency band interference and remove the center subcarrier. (DC Subcarrier) The remaining 420 subcarriers are used for data and pilot transmission. Each data subchannel (Data Subchannel) consists of 14 subcarriers (Subcarrier), a total of 30 data subchannels transmit data and pilots, and 2 guard subchannels (Guard Subchannel) consist of 46 and 45 guard subcarriers.

[0034] ParameterParameter value Number of center subcarriers 1 Number of left guard bands

46 Number of right sub guard bands

45 Number of available subcarriers 420 Number of subcarriers per data subchannel 14 Number of data subchannels (including protection subchannels) 32 ...

Embodiment 2

[0043] The main difference between the second embodiment of the present invention and the first embodiment is that the numbers of LRCH and DRCH are different.

[0044] In this embodiment, Distributed tile size=1 and Localized tile size=1 are set, indicating that the Distributed tile and the Localized tile consist of 28 subcarriers (Subcarrier) and 6 symbols (Symbol).

[0045] LRCH consists of 14 consecutive subcarriers and 6 consecutive symbols. The DRCH is composed of 7 groups of time-frequency blocks scattered in the frequency domain, and each time-frequency block contains 2 consecutive subcarriers and 6 consecutive symbols, that is, the DRCH consists of 14 scattered subcarriers and 6 consecutive symbols.

[0046] see Figure 4 , is a schematic diagram of a resource channel multiplexing method used in data transmission in Embodiment 2 of the present invention.

[0047] As shown in the figure, the slashed part represents the distributed zone Distributed Zone1, the shaded pa...

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Abstract

The embodiment of the invention discloses a data transmission method. The method comprises the following steps: determining that the multiplexing mode of mini frame is such that a distributed resource channel and a centralized resource channel occupy different physical time-frequently units and further the centralized resource channel occupies the resource of the distributed resource channel; and transmitting a frame or a super frame formed by mini frames in the determined multiplexing mode. Correspondingly, the embodiment of the invention also discloses a data transmission device. The data transmission device comprises a multiplexing mode determining unit used for determining the multiplexing mode of mini frame is such that a distributed resource channel and a centralized resource channel occupy different physical time-frequently units and further the centralized resource channel occupies the resource of the distributed resource channel; and a receiving / transmitting unit used for externally transmitting a frame or a super frame formed by mini frames in the determined multiplexing mode. The data transmission method can flexibly allocate the channel resources to perform the data transmission.

Description

technical field [0001] The present invention relates to the technical field of communication, and in particular to a data transmission method and a transmission device. Background technique [0002] The IEEE802 standard defines the physical layer and data link layer of ISO / OSI, and is the wireless metropolitan area network standard of IEEE. At present, the IEEE 802.16 working group has established the 802.16m working group to study the subsequent evolution of the IEEE 802.16e, the IEEE 802.16m standard. Currently, a super frame structure is proposed in the prior art, please refer to figure 1 Schematic diagram of the prior art superframe format, such as figure 1 As shown, a subframe mini frame is composed of 6 OFDM symbols; a frame frame is composed of 8 subframe mini frames; a super frame is composed of 4 frame frames. [0003] The UMB protocol is an evolution and upgrade version of the CDMA2000 series of standards. In the existing UMB protocol, there are two ways of mul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/02H04L5/26
Inventor 刘珏君金雷
Owner HUAWEI TECH CO LTD