Resource allocation signaling generating method based on OFDM system

A technology of resource allocation and orthogonal frequency division, which is applied in the direction of orthogonal multiplexing system, multi-frequency code system, multiplexing communication, etc., can solve the problem that the system throughput has a great impact, reduce signaling overhead, reduce Resource scheduling flexibility and other issues

CN101388870AInactive Publication Date: 2009-03-18ZTE CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2009-03-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method for generating resource allocation signaling based on orthogonal frequency division multiplex system, which comprises: dividing all the usable sub-carriers in the orthogonal frequency division multiplex system into several resource blocks and allocating a logic serial number to each resource block; grouping the users according to their service performance types; defining group resource allocation signaling which contains a group serial number field, a group type field and a group resource initial serial number field; arranging the resource allocation quantity of the users in one group and its code level modulating needed longest field, and the uniform resource allocation quantity of the users in one group and the code level modulating field. The resource allocation signaling generating method based on group made in the invention can support more flexible resource scheduling with lower signaling cost; and can suit for the application of services in different types even mixed services.
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Description

technical field

[0001] The invention relates to a broadband wireless communication system, in particular to a method for generating resource allocation signaling based on an orthogonal frequency division multiplexing system. Background technique

[0002] Orthogonal Frequency Division Multiplexing (OFDM) technology is one of the main candidates for future wireless communication technologies. In the frequency domain, a given channel is divided into many orthogonal subcarriers, signals are modulated on each subcarrier, and each subcarrier is transmitted in parallel. In this way, although the frequency response curve of the wireless channel is non-flat and has frequency selectivity, each sub-carrier is relatively flat, and a narrow-band transmission is performed on each sub-carrier, and the signal bandwidth is smaller than the channel bandwidth, so the signal can be greatly eliminated. Interference between waveforms. Since each sub-carrier is orthogonal to each other in the OF...

Examples

Embodiment

[0054] Taking the 3GPP (Third Generation Partnership Project) LTE (Long Term Evolution, Long Term Evolution) FDD (Frequency Division Duplex, Frequency Division Duplex) system as an example, a subframe contains 14 consecutive OFDM symbols, and the time length is 1ms . In this embodiment, 12 consecutive subcarriers and 14 consecutive OFDM symbols represent a resource block RB, such as figure 1 shown.

[0055] For the structure of the group resource allocation signaling set in this embodiment, see image 3 , starting high:

[0056] The first field is the group sequence number, and the length is K1bits (bits), and K1 is determined according to the maximum possible number of groups in the OFDM system. For example, assume that the number of retransmissions in the LTE system is 3 times, that is, there are 4 HARQ (Hybrid Automatic Repeat reQuest, automatic repeat request) processes, and each HARQ process is separated by 5 subframes, that is to say, it can be performed in 5 time pro...