Method of implementing packet-based resource allocation and persistent resource allocation in a wireless communication system
The present invention provides a method of allocating resources in a wireless communication system. The method includes requesting persistent allocation of resources for a data spurt in response to detecting the beginning of the data spurt and performing non-persistent resource allocation for at least one packet in the data spurt. The non-persistent resource allocation is performed in response to determining that persistent resources are not available for allocation. The method also includes transmitting the packet using the allocated non-persistent resources.
1. A scheduler for use in a wireless communication system comprising: one or more processors having; the scheduler being configured to:
receive requests for persistent allocation of resources for a data spurt in response to determining that the data spurt is ready for transmission over an air interface; and
perform non-persistent resource allocation for at least one packet in the data spurt in response to determining that persistent resources are not available for allocation, wherein determining that persistent resources are not available for allocation comprises determining that an elapsed time since detection of the beginning of the data spurt has exceeded a predetermined threshold value prior to the persistent allocation of the resources.
2. A scheduler for use in a wireless communication system comprising: one or more processors having; the scheduler being configured to:
receive requests for persistent allocation of resources for a data spurt in response to determining that the data spurt is ready for transmission over an air interface; and
perform non-persistent resource allocation for at least one packet in the data spurt in response to determining that persistent resources are not available for allocation, wherein determining that persistent resources are not available for allocation comprises determining that an overhead associated with persistent resource allocation is larger than an overhead associated with non-persistent resource allocation.
3. The scheduler of claim 1 or 2 , wherein the scheduler is configured to receive requests for persistent allocation of resources for the data spurt provided by at least one of a voice application, a Voice over Internet Protocol (VoIP) application, a video telephony application, a push-to-talk application, a streaming video application, a constant bit rate application, or a guaranteed bit rate application.
4. The scheduler of claim 1 or 2 , wherein the scheduler is configured to receive requests for at least one of a timeslot, frequency, code sequence, tone, sub-carrier, tile, resource block, base node, or power.
5. The scheduler of claim 1 or 2 , wherein the scheduler is configured to:
perform persistent resource allocation for the data spurt; and
switch from persistent resource allocation to non-persistent resource allocation in response to determining that an overhead associated with persistent resource allocation is larger than an overhead associated with non-persistent resource allocation.
6. The scheduler of claim 1 or 2 , wherein the scheduler is configured to determine whether resources for the data spurt can be persistently allocated.
7. The scheduler of claim 6 , wherein the scheduler is configured to determine that resources for the data spurt can be persistently allocated when an overhead associated with persistent allocation is less than an overhead associated with non-persistent allocation.
8. The scheduler of claim 6 , wherein the scheduler is configured to monitor at least one condition for completing the persistent allocation and determine whether said at least one condition for completing the persistent allocation is satisfied.
9. The scheduler of claim 7 , wherein the scheduler is configured to monitor said at least one condition concurrently with performing the non-persistent resource allocation for said at least one packet and transmitting said at least one packet using the allocated non-persistent resources.
10. The scheduler of claim 6 , wherein the scheduler is configured to perform persistent allocation of resources to the data spurt so that at least a portion of the data spurt can be transmitted using the persistently allocated resources.
11. The scheduler of claim 10 , wherein the scheduler is configured to end non-persistent allocation of resources to packets in the data spurt.
12. The scheduler of claim 11 , wherein the scheduler is configured to perform persistent allocation of resources concurrently with non-persistent allocation of resources for a selected period of time prior to ending non-persistent allocation of resources.
13. The scheduler of claim 12 , wherein the scheduler is configured to select the period of time for concurrent persistent and non-persistent allocation of resources.
14. The scheduler of claim 13 , wherein the scheduler is configured to select the period of time based upon at least one of a number of packets in a queue or a target packet latency.
15. The scheduler of claim 6 , wherein the scheduler is configured to:
monitor at least one condition for completing the persistent allocation;
determine that said at least one condition for completing the persistent allocation is not satisfied; and
resume non-persistent allocation of resources to at least one packet in the data spurt in response to determining that said at least one condition for completing the persistent allocation is not satisfied.
16. The scheduler of claim 1 or 2 , wherein the scheduler is configured to detect the beginning of the data spurt in response to initiation of a new data spurt, initiation of an application that provides the data spurt, or handoff of a communication session.