Communication method, wireless communication system, transmitter, and receiver

Abstract

In a wireless communication system where data transmission is performed between a base station and terminals, the base station individually generates, for each terminal, a bit map indicative of scheduling resource numbers to be allocated to terminals to which Localized transmission is applied, based on a resource-number mapping rule defined by providing individual resource block numbers to all resource blocks, taking resource block numbers of resource blocks for Distributed transmission as fixed values, and providing individual scheduling resource numbers to remaining resource blocks for Localized transmission except the resource blocks for Distributed transmission for each of scheduling resources corresponding to the number of aggregation.

Description

TECHNICAL FIELD[0001]The present invention relates to a communication method, wireless communication system, and transmitter and receiver that configure the system when Localized transmission and Distributed transmission are mixed in the same sub-frame.BACKGROUND ART[0002]Currently in 3GPP, under the name of LTE (Long Term Evolution), a wireless system adopting a new wireless technique has been studied. In this wireless system, a plurality of data channel resources are defined on a frequency axis to measure the state of quality of each channel and, based on the measurement results, a data channel resource for use in communication is determined. And, a notification about the data channel resource determined therein is made as allocation information by using a control channel to each terminal configuring the system mentioned above.[0003]Also, in a downstream (base station→terminal) frame studied as LTE, a control channel and a data channel are disposed in one sub-frame, and resource a...

AI Technical Summary

Benefits of technology

[0022]According to the present invention, an effect can be achieved such that, even in a system where Localized transmission and Distributed transmission are mixed in the same sub-frame, the receiving process by the terminal can be simplified, compared with the conventional technology, and an increase in circuit size and process delay can be avoided.

[0023]Also, an effect can be achieved such that, even in a system where Localized transmission, Distributed transmission, and Sub-sampling transmission are mixed in the same sub-frame, flexibility in allocating resource blocks for Sub-sampling transmission can be enhanced, compared with the conventional technology.

Problems solved by technology

However, as explained above, since 100 resource blocks are present at maximum in LTE, notification to each terminal by using a bit map of 100 bits leads to a shortage of control channels.

On the other hand, although the Localized transmission mentioned above is an effective technique when the traveling speed of the terminal is slow, it cannot be much an effective technique when the traveling speed is fast.

For example, since reporting the channel quality and scheduling require a certain processing time, when the traveling speed is fast, changes of the channel quality in a direction of time is quickened, and therefore the contents of the report of the channel quality may possibly be obsolete at the time of actual data transmission.

Also, in this Sub-sampling transmission, resource blocks to be allocated to one terminal have to be selected from the same subset, and allocating resource blocks from different subsets to one terminal is not allowed.