Radio communication method, and radio communication system
Provided is a radio communication method to be performed by a radio communication system using a TDD scheme, the radio communication method including: an acquisition step of acquiring a TDD configuration of another radio communication system that might have an overlapping communication area; a determination step of determining priorities of slots of the radio communication system, based on the acquired TDD configuration, such that a priority of a first slot, in which an uplink slot timing and a downlink slot timing overlap those of the another radio communication system, is lower than a priority of a second slot, in which the uplink slot timing and the downlink slot timing do not overlap those of the another radio communication system; and an allocation step of allocating resources to the slots of the radio communication system according to the priorities of the slots.
1 . A radio communication method to be performed by a first radio communication system using a time division duplex scheme, the radio communication method comprising:
receiving information indicating a time division duplex configuration of a second radio communication system having a communication area that overlaps a communication area of the first radio communication system;
setting a priority of a first slot, in which an uplink slot timing in the first radio communication system overlaps a downlink slot timing in the second communication system or a downlink slot timing in the first radio communication system overlaps an uplink slot timing in the second communication system, to be lower than a priority of a second slot, in which the uplink slot timing in the first radio communication system does not overlap the downlink slot timing in the second radio communication system or the downlink slot timing in the first radio communication system does not overlap the uplink slot timing in the second communication system, based on the time division duplex configuration acquired with respect to the second radio communication system; and
allocating resources to the slots of the first radio communication system according to the priorities of the slots,
wherein the first slot also includes one or both of:
a third slot, in which the uplink slot timing in the first radio communication system overlaps a downlink slot timing in the second radio communication system; and
a fourth slot, in which the downlink slot timing in the first radio communication system overlaps an uplink slot timing in the second radio communication system, and
wherein, when the first slot includes the third slot and the fourth slot, a priority of the third slot is set to be lower than the priority of the second slot and a priority of the fourth slot is set to be lower than the priority of the third slot.
2 . The radio communication method according to claim 1 , wherein the resources are allocated to slots having higher slot priorities, in descending order of resources having higher packet priorities.
3 . The radio communication method according to claim 1 , wherein the information indicating the time division duplex configuration of the second radio communication system is received by snooping radio waves transmitted by the second radio communication system.
4 . The radio communication method according to claim 1 ,
wherein the first radio communication system shares resource allocation information with the second radio communication system, and
wherein, when a timing of a slot in which the second radio communication system transmits a high-priority packet and a timing of a slot in which the first radio communication system transmits a low-priority packet having a lower priority than the high-priority packet overlap, the first radio communication system cancels transmission of the low-priority packet.
5 . The radio communication method according to claim 1 , wherein the second radio communication system synchronizes with the first radio communication system and uses a frequency band that is same as a frequency band of the first radio communication system.
6 . A first radio communication system using a time division duplex scheme, the first radio communication system comprising:
a receiver configured to receive information indicating a time division duplex configuration of a second radio communication system having a communication area that overlaps a communication area of the first radio communication system; and
a processor configured to set a priority of a first slot, in which an uplink slot timing in the first radio communication system overlaps a downlink slot timing in the second communication system or a downlink slot timing in the first radio communication system overlaps an uplink slot timing in the second communication system, to be lower than a priority of a second slot, in which the uplink slot timing in the first radio communication system does not overlap the downlink slot timing in the second radio communication system or the downlink slot timing in the first radio communication system does not overlap the uplink slot timing in the second communication system, based on the time division duplex configuration acquired with respect to the second radio communication system,
wherein the processor is configured to allocate resources to the slots of the first radio communication system according to the priorities of the slots,
wherein the first slot also includes one or both of:
a third slot, in which the uplink slot timing in the first radio communication system overlaps a downlink slot timing in the second radio communication system; and
a fourth slot, in which the downlink slot timing in the first radio communication system overlaps an uplink slot timing in the second radio communication system, and
wherein, when the first slot includes the third slot and the fourth slot, the processor set a priority of the third slot to be lower than the priority of the second slot and a priority of the fourth slot to be lower than the priority of the third slot.