Method and apparatus for dynamic backhaul resource management in a wireless communication system
First Claim
1. A method for dynamic backhaul resource management in a wireless communication system comprising:
- determining, by a packet controller, a link capacity of a backhaul link for conveying data to be transmitted during a transmit period;
determining, by the packet controller, a data traffic level which is an amount of data that will need to be conveyed by the backhaul link for transmission during the transmit period, assuming that wireless unit coding schemes are maximized according to present wireless channel conditions;
when the data traffic level is greater than the link capacity, reducing a coding scheme of at least one wireless unit for the transmit period in order to reduce the data traffic level to fit within the data capacity of the backhaul link;
conveying data targeted for an air interface timeslot for the transmit period via multiple backhaul link timeslots.
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Accused Products
Abstract
Various embodiments are described to address the need to lower backhaul costs for EGPRS operators while maintaining the low and constant delay characteristics they require. 20 msec TRAU frames (221-226) are still used for backhaul to maintain the low and constant delay. However, to eliminate the restriction of mapping TRAU timeslots to air timeslots (211-218) one-to-one, the TRAU slots are collectively treated as a one large 20 msec TRAU frame for a group of air timeslots. The data for the air timeslots can be packed efficiently into this giant TRAU frame, ignoring backhaul timeslot boundaries. In this way, the appropriate amount of backhaul for the carrier can be allocated and the data for the air interface timeslots more efficiently packed into the backhaul.
12 Citations
16 Claims
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1. A method for dynamic backhaul resource management in a wireless communication system comprising:
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determining, by a packet controller, a link capacity of a backhaul link for conveying data to be transmitted during a transmit period; determining, by the packet controller, a data traffic level which is an amount of data that will need to be conveyed by the backhaul link for transmission during the transmit period, assuming that wireless unit coding schemes are maximized according to present wireless channel conditions; when the data traffic level is greater than the link capacity, reducing a coding scheme of at least one wireless unit for the transmit period in order to reduce the data traffic level to fit within the data capacity of the backhaul link; conveying data targeted for an air interface timeslot for the transmit period via multiple backhaul link timeslots. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A packet controller for dynamic backhaul resource management in a wireless communication system, the packet controller comprising:
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a packet controller network interface adapted to send and receive messaging using a plurality of communication protocols; a controller, communicatively coupled to the packet controller network interface, adapted to determine a link capacity of a backhaul link for conveying data to be transmitted during a transmit period, adapted to determine a data traffic level which is an amount of data that will need to be conveyed by the backhaul link via the packet controller network interface for transmission during the transmit period, assuming that wireless unit coding schemes are maximized according to present wireless channel conditions, and adapted to reduce a coding scheme of at least one wireless unit for the transmit period, when the data traffic level is greater than the link capacity, in order to reduce the data traffic level to fit within the data capacity of the backhaul link, wherein the controller is further adapted to convey, via the packet controller network interface, data targeted for an air interface timeslot for the transmit period via multiple backhaul link timeslots. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification