Methods and apparatuses for allocating time slots to half duplex wireless mobile stations
View Patent ↗Methods and apparatuses for allocating control and data time slots to a plurality of wireless mobile stations in a wireless communication system using time division multiplexing. The methods and apparatuses assign such time slots by first placing the wireless mobile stations into a number of different groups. Then, control time slots and anchor data time slots are assigned to the groups in the uplink and downlink frames of a carrier such that the uplink control time slot for each group is maximally spaced in time relative to the downlink control time slot for the same group. Data time slots are subsequently assigned to a particular mobile station by assigning time slots in the uplink and downlink frames which are as close as possible to the group's uplink or downlink anchor data time slots, as the case may be, according to a “grow from center” technique.
1. A method of allocating time slots to wireless mobile stations comprising:
assigning control time slots of a frame of a first carrier, associated with wireless communication in a first direction, to a plurality of wireless mobile stations;
assigning each control time slot of one or more control time slots of a frame of a second carrier, associated with wireless communication in a second direction, to the plurality of wireless mobile stations to a position corresponding to a position in time that is between two control time slots of the first carrier and maximally spaced in time relative to the positions of the two control time slots; and
assigning one or more data time slots used to communicate data, to a particular wireless mobile station of said plurality of wireless mobile stations, to positions before or after the position of a control time slot of one of the carriers beginning from positions that are as near as possible in time to the control time slot of the carrier to positions that are farther from the position in time of the control time slot of the carrier.
2. The method of claim 1 , further comprising assigning one or more of the control time slots of the frame of the second carrier to a position in time that is midway between a position in time of two of the control time slots of the first carrier.
3. The method of claim 1 , further comprising assigning one or more of the data time slots adjacent in time to a control time slot of one of the carriers.
4. The method of claim 1 , wherein the method further comprises assigning a data time slot of a frame of a third carrier to the wireless mobile station of the plurality of wireless mobile stations that coincides with the position in time of a control time slot of the time frame of the first carrier, wherein the time frame of the third carrier is associated with wireless communication in the first direction.
5. An apparatus for allocating time slots to a plurality of wireless mobile stations in a wireless communication system, said apparatus comprising:
a controller adapted to;
assign control time slots of a frame of a first carrier, associated with wireless communication in a first direction, to a plurality of wireless mobile stations;
assign each control time slot of one or more control time slots of a frame of a second carrier, associated with wireless communication in a second direction, to the plurality of wireless mobile stations to a position corresponding to a position in time that is between two control time slots of the first carrier and maximally spaced in time relative to the positions of the two control time slots; and
assign one or more data time slots used to communicate data, to a particular wireless mobile station of said plurality of wireless mobile stations, to positions before or after the position of a control time slot of one of the carriers beginning from positions that are as near as possible in time to the control time slot of the carrier to positions that are farther from the position in time of the control time slot of the carrier.
6. The apparatus of claim 5 , wherein the controller is further adapted to assign one or more of the control time slots of the frame of the second carrier to a position in time that is midway between a position in time of two of the control time slots of the first carrier.
7. The apparatus of claim 5 , wherein the controller is further adapted to assign one or more of the data time slots adjacent in time to a control time slot of one of the carriers.
8. The apparatus of claim 5 , wherein the controller is further adapted to assign a data time slot of a frame of a third carrier to the wireless mobile station of the plurality of wireless mobile stations that coincides with the position in time of a control time slot of the time frame of the first carrier, wherein the time frame of the third carrier is associated with wireless communication in the first direction.