Communication system

Abstract

The invention relates to a communication system. A signalling method for use in a multiple-access communication system, the system comprising a first communication apparatus and a plurality of second communication apparatuses, the second communication apparatuses being operable to communicate with the first communication apparatus using respective parts of a shared communication frame and each using an available service level for such communication, the method comprising: assessing service-level requests from the second communication apparatuses to determine if there is a group of the second communication apparatuses that have corresponding service-level requirements; if it is determined that such a group exists, employing a first control scheme for transmission in the shared communication frame of communication control information for the second communication apparatuses of the group; and for any second communication apparatus not part of the group, employing a further control scheme different from said first control scheme for transmission in the shared communication frame of communication control information for that second communication apparatus, wherein the first and further control schemes are configured such that use of the first control scheme for said group of second communication apparatuses enables communication for more such second communication apparatuses to be supported in said shared communication frame than if such a further control scheme were used for said group of second communication apparatuses.

Description

[0001] This application is a divisional application of the invention patent application with the application number 200810144722.9, the application date is July 30, 2008, and the invention name is "communication system". technical field [0002] The present invention relates to communication systems, for example, to OFDMA-based communication systems, and to signaling methods for use in such systems. Background technique [0003] In previously considered communication systems, a high degree of flexibility and controllability is built into the system specification, enabling the specification of many parameters of the communication. In order to provide this flexibility, a large amount of control information is required to be able to specify a large number of controllable parameters. This is especially prevalent in multiple-access systems where communication with many devices is carried out simultaneously by dividing resources in a communication frame, each device requiring its ...

AI Technical Summary

Problems solved by technology

However, the basic structure of 2D allocation-based medium access in DL will still lead to an inefficient mechanism especially when the traffic flow properties lead to a deterministic resource allocation pattern, especially for low data rate applications.

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