Communication device and communication method for the same

Abstract

The present invention relates to a communication device (1) for transmitting and receiving data in a communication system and a corresponding communication method. In the communication system, which can be a wireless or a wired communication system, a random access channel is provided, which comprises a plurality of access resources. The access resources are divided in at least two access resource groups, each access resource groups corresponding to a different access service class with a respective access probability. The communication device (1) according to the present invention, comprises selecting means (5) for randomly selecting an access resource from an access resource group corresponding to the current access service class of the communication device (1), transmitting means (3) for transmitting a random access burst in said selected access resource and detecting means (6) for detecting a specific event, whereby the current access service class of the communication device (1) is changed into another access service class when said specific event is detected by the detecting means (6). The present invention proposes a simple and flexible scheme for the adaptation of the performance of a communication device (1) in the random access procedure in the case of certain events.

Description

technical field [0001] The present invention relates to a communication device for transmitting and receiving data in a communication system, and to a communication method for such a communication device. In this communication system, one random access channel is provided, wherein the random access channel provides a plurality of access resources. A random access channel is a communication channel used to establish a connection from one communication device to another communication device of a communication system. The communication system can thus be a wireless communication system or a wired communication system or a mixture of both. Background technique [0002] The access resources of this random access channel are randomly accessed by, for example, communication devices that want to establish a connection or send a short message. Thus, this access is contention based, which means that several communication devices trying to establish a connection may try to access the...

AI Technical Summary

Problems solved by technology

In the temporary priority distribution, the highest priority user group (i.e., the user group with the highest access probability of the access resource) tries to access all available access resources, while the lower priority user group (i.e. , user groups with lower access probability) only try to access a part of the available access resources, the disadvantage is that the access attempts of the highest priority user group must compete with the access attempts of all other priority groups

Thus, a very high priority access attempt (e.g., an emergency call) may not succeed because it must contend with other lower priority access attempts

Images