Method of signaling allocated resources
View Patent ↗Disclosed is a method of signaling hopping locations selected by a scheduling entity using a frequency hopping pattern indicator for indicating hopping locations for at least two re-transmissions. The frequency hopping pattern is selected by the scheduling entity which may have knowledge of all or at least a plurality of scheduled reverse link transmissions or restrictions upon reverse link transmissions, thereby allowing reverse link re-transmissions to be scheduled in a manner compatible with other reverse link transmissions and restrictions. Overall signaling overhead associated with scheduling re-transmissions is reduced through the signaling of a single message which indicates hopping locations for at least two re-transmissions instead of two or more separate messages, wherein each of the two or more separate message indicates a hopping location for an individual re-transmission.
1. A method of signaling a plurality of sub-carrier frequency locations in a wireless communication system comprising the step of:
transmitting, by a single scheduling grant, a sub-carrier frequency pattern indicator for a sub-carrier frequency pattern selected by a scheduling entity, wherein the selected sub-carrier frequency pattern indicates a first set of sub-carrier frequency locations for an initial transmission and different sets of sub-carrier frequencies for at least two re-transmissions by a first receiving entity, the sub-carrier frequency pattern indicator being selected based on scheduling restrictions due to prior scheduling decisions for a plurality of receiving entities, the scheduling entity having knowledge of frequency-use assignment for a plurality of transmissions from a transmitting entity to the plurality of receiving entities.
2. The method of claim 1 , wherein the sub-carrier frequency pattern indicator indicates a different, predetermined set of sub-carrier frequency locations for the initial transmission and each of the at least two re-transmissions.
3. The method of claim 1 , wherein the sub-carrier frequency pattern indicator is selected based on a location of a first receiving entity.
4. The method of claim 1 , wherein the sub-carrier frequency pattern indicator is selected based on an interference mitigation technique implemented in the wireless communication system.
5. The method of claim 1 , wherein the sub-carrier frequency pattern indicator is selected based on channel quality between a base station and a mobile station.
6. The method of claim 5 , wherein the selected sub-carrier frequency pattern indicator indicates to the mobile station not to move to a different set of sub-carrier frequencies when the channel quality is above a threshold value.
7. The method of claim 1 , wherein the sub-carrier frequency pattern indicator was transmitted as a part of a scheduling grant which indicates resources allocated to a mobile station for initially transmitting a data packet.
8. The method of claim 1 , wherein the wireless communication system utilizes an orthogonal frequency division multiple access air interface for communication between a base station and a mobile station.
9. The method of claim 8 , wherein the scheduling entity is located at the base station, the reverse link transmissions are scheduled by the scheduling entity, and the sub-carrier frequency pattern indicator is transmitted from the base station to the mobile station.
10. The method of claim 1 , wherein the sub-carrier frequency pattern indicator is an index to a table associating indicies to sub-carrier frequency patterns, and the table being known to the scheduling entity and a mobile station to which the indicator of sub-carrier frequency pattern is being transmitted.
11. The method of claim 1 , wherein the sub-carrier frequency pattern indicator is being transmitted prior to any of the at least two re-transmissions.
12. The method of claim 1 , wherein the wireless communication system utilizes a non-adaptive, synchronous hybrid automatic request re-transmission scheme.
13. A method of signaling allocated resources in a wireless communication system comprising the step of:
transmitting from a base station a single scheduling grant indicating a first set of sub-carrier frequencies allocated for an initial reverse-link data packet transmission and different sets of sub-carrier frequencies allocated for at least two reverse-link data packet re-transmissions, the scheduling grant based on at least scheduling restrictions due to prior scheduling decisions for a plurality of receiving entities.
14. The method of claim 13 , wherein the set of sub-carrier frequencies allocated for the data packet re-transmission is indicated using a hopping location relative to the set of sub-carrier frequencies allocated for the initial data packet transmission.
15. The method of claim 13 comprising the additional step of:
prior to transmitting the scheduling grant, selecting a hopping location for the data packet re-transmission from a set of predetermined hopping locations.
16. The method of claim 13 comprising the additional step of:
prior to transmitting the scheduling grant, selecting a hopping location for the data packet re-transmission based on a mobile station location.
17. The method of claim 13 comprising the additional step of:
prior to transmitting the scheduling grant, selecting a hopping location for the data packet re-transmission based on channel quality between a base station and a mobile station.