Resource distribution and transceiving method and device for orthogonal frequency division multi address accessing system

Abstract

The invention gives attentions to higher flexibility, simplified dispatch performance, and higher performance of frequency diversity when OFDMA carries of communication. The invention partitions available frequency band into at least two DRCH zones and one LRCH zone. In each OFDM code element, each DRCH possesses sub carriers in at least two DRCH zones. Size of DRCH zone can be configured dynamically. Sub carriers of each LRCH are continuous sub carriers in same LRCH zone. In different frames, each DRCH and LRCH contains invariable number of sub carriers. Moreover, number of sub carriers contained in each DRCH is equal to number of sub carriers contained in each LRCH. Sub carriers associated to DRCH is composed of sub carriers in different DRCH zones distributed in whole frequency plane divergingly.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to physical channel resource allocation and data sending and receiving technology of an orthogonal frequency division multiple access system. Background technique [0002] In recent years, a multi-carrier transmission technology represented by Orthogonal Frequency Division Multiplexing (Orthogonal Frequency Division Multiplexing, "OFDM") has attracted widespread attention. Multi-carrier transmission decomposes a data stream into several independent sub-streams, each of which will have a much lower bit rate. Using the low-rate multi-state symbols formed at such a low bit rate to modulate the corresponding subcarriers constitutes a transmission system in which multiple low-rate symbols are sent in parallel. [0003] As a representative multi-carrier transmission technology, OFDM divides the frequency spectrum into many sub-carriers, and each sub-carrier is modulated with a lower d...

AI Technical Summary

Problems solved by technology

However, in practical applications, the data volumes of centrally allocated users and discretely allocated users are often unbalanced, and are likely to change greatly over time.

For example, there are often more users moving at a low speed than users moving at a high speed, and the ratio of users moving at a high speed to the total number of users is not a fixed value. Therefore, if this allocation method is used fixedly, it is easy to cause a large increase in physical channel resources. Wasteful, not what the system design originally intended

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