Patent ID: 9025455
Filing Date: 2015-05-05
Classification: H04W

Abstract:
1. A prioritized random access method, comprising: transmitting a random access signal, from a wireless communication device, in logical resources allocated to the wireless communication device; determining, at the wireless communication device, whether a collision occurs to the random access signal transmitted from the wireless communication device according to a signal from a control station; and when the collision occurs to the transmitted random access signal, performing a random access process or a backoff process at least according to a service class of the wireless communication device, wherein the signal from the control station is an indicator, wherein the service class is classified to be in one of at least three sets of service classes, and the at least three sets of service classes comprises a first service class set, a second service class set and a third service class set, wherein the first service class set is allocated with a first part of the logical resources, the second service class set is allocated with a second part of the logical resources, and the first part of the logical resources is not overlapped with the second part of the logical resources, wherein the third service class set is allocated with a third part of the logical resources, and the third part of the resources is overlapped with the first part of the logical resources or the second part of the logical resources, wherein the second service class set comprises at least a first priority service class and a second priority service class, and the logical resources which are allocated to the first priority service class are overlapped with the logical resources which are allocated to the second priority service class, wherein the logical resources which are allocated to the first priority service class are more than the logical resources which are allocated to the second priority service class, wherein the first priority service class has a higher priority than the second priority service class, and wherein the prioritized random access method further comprises: when receiving the indicator from the control station, performing the backoff process based on the indicator; and when no indicator is received from the control station, performing the random access process by re-transmitting the random access signal in the logical resources which are allocated to the service class of the wireless communication device.