Method, apparatus and communication system for requesting resource

摘要

The present invention discloses a method of requesting resource from a resource allocating apparatus by a request requesting apparatus, a resource allocating apparatus, a resource requesting apparatus and a communication system. The method comprises the following steps: sending a resource request message from the resource requesting apparatus to the resource allocating apparatus; after receiving the resource request message, if resource cannot be allocated within a set time interval with respect to the resource requesting apparatus, sending an acknowledgement for the resource request message from the resource allocating apparatus to the resource requesting apparatus; and if the resource is allocated to the resource requesting apparatus within the set time interval, not sending the acknowledgement for the resource request message from the resource allocating apparatus to the resource requesting apparatus. Utilizing the method and structure of the present invention, the resource allocating apparatus sends additional acknowledgement message only if needed, therefore overhead is reduced much more. Moreover, since the solution of the present invention does not change any signaling exchanged between the resource allocating apparatus and the resource requesting apparatus, it is able to meet the requirement of backward compatibility.

主权项

1. A method of requesting a resource from a resource allocating apparatus by a resource requesting apparatus, comprising:
receiving a resource request message; if the resource cannot be allocated within a set time interval with respect to the resource requesting apparatus, sending an acknowledgement for the resource request message from the resource allocating apparatus to the resource requesting apparatus, wherein if the resource requesting apparatus receives the acknowledgement for the resource request message sent by the resource allocating apparatus to the resource requesting apparatus in the set time interval, the resource requesting apparatus waits for resource allocation from the resource allocating apparatus, wherein if the resource cannot be allocated within the set time interval with respect to the resource requesting apparatus, the acknowledgement for the resource request message is sent from the resource allocating apparatus to the resource requesting apparatus by virtue of a bandwidth allocation (UL grant), wherein if the resource cannot be allocated to the resource requesting apparatus within the set time interval, a value in a specific field of the UL grant sent by the resource allocating apparatus is set to indicate that the size of the resource in the UL grant is 0; and if the resource is allocated to the resource requesting apparatus within the set time interval, not sending the acknowledgement for the resource request message from the resource allocating apparatus to the resource requesting apparatus.