Resource allocation signaling generating method based on OFDM system

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.

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...

AI Technical Summary

Problems solved by technology

For example, the commonly used dynamic scheduling at present is to negotiate the time-frequency position of resources to be allocated for each user data packet transmission through signaling handshake between the user and the base station. The format of the dynamic scheduling signaling is simple and short, which can endow the scheduling algorithm with a strong flexibility, but the disadvantage is that frequent signaling interactions between users and base stations are required, and the signaling overhead is too large, which has a great impact on system throughput

For this reason, a group-based scheduling signaling is proposed. The method is to form a group of several users and combine the resource allocation signaling of these users into one signaling. This method reduces signaling to a certain extent. overhead, but also reduces resource scheduling flexibility

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