Method and apparatus for bandwidth request/grant protocols in a wireless communication system
First Claim
1. A method of duplexing transmission in a wireless communication network where a base station communicates with wireless mobile stations, the method comprising:
- enabling the base station to;
set up a frame for wireless transmission over a communication link shared between the base station and the wireless mobile stations based on communication resources allocated to uplink and downlink transmissions in the frame;
establish uplink (UL) grants based on bandwidth requests received from the wireless mobile stations and on the communication resources allocated to uplink transmissions;
establish downlink (DL) allocations based on the amount of DL data awaiting downlink transmission at the base station and on the communication resources allocated to downlink transmissions; and
transmit to the wireless mobile stations an allocation indication with the UL grants and DL allocations; and
enabling a first wireless mobile station to;
associate data received from a plurality of data sources with a queue;
transmit a first bandwidth request to the base station, and setting an initial value of a timer in association with the transmitting of the first bandwidth request;
receive from the base station an UL grant in response to the first bandwidth request and transmitting an UL data block in accordance with the UL grant;
upon expiration of the initial value in the timer and in the absence of the receipt of the UL grant, transmit a subsequent bandwidth request; and
receive a first DL data block in a DL allocation provided to the first wireless mobile station.
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Accused Products
Abstract
A method and apparatus for allocating bandwidth in a broadband wireless communication system is disclosed. One embodiment uses a self-correcting bandwidth request/grant protocol. The self-correcting bandwidth request/grant protocol utilizes a combination of incremental and aggregate bandwidth requests. CPEs primarily transmit incremental bandwidth requests to their associated base stations, followed by periodic transmissions of aggregate bandwidth requests. The use of periodic aggregate bandwidth requests (that express the current state of their respective connection queues) allows the bandwidth allocation method and apparatus to be “self-correcting”. Another embodiment utilizes an abridged bandwidth request/grant protocol to allocate bandwidth. The abridged bandwidth request/grant protocol system utilizes padding packets to request a reduction in bandwidth allocation to a CPE. A base station modem alerts a base station CPU when the BS modem receives a padding packet from a CPE. After alerting the BS CPU the method can reduce the associated CPE'"'"'s bandwidth allocation.
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Citations
33 Claims
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1. A method of duplexing transmission in a wireless communication network where a base station communicates with wireless mobile stations, the method comprising:
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enabling the base station to; set up a frame for wireless transmission over a communication link shared between the base station and the wireless mobile stations based on communication resources allocated to uplink and downlink transmissions in the frame; establish uplink (UL) grants based on bandwidth requests received from the wireless mobile stations and on the communication resources allocated to uplink transmissions; establish downlink (DL) allocations based on the amount of DL data awaiting downlink transmission at the base station and on the communication resources allocated to downlink transmissions; and transmit to the wireless mobile stations an allocation indication with the UL grants and DL allocations; and enabling a first wireless mobile station to; associate data received from a plurality of data sources with a queue; transmit a first bandwidth request to the base station, and setting an initial value of a timer in association with the transmitting of the first bandwidth request; receive from the base station an UL grant in response to the first bandwidth request and transmitting an UL data block in accordance with the UL grant; upon expiration of the initial value in the timer and in the absence of the receipt of the UL grant, transmit a subsequent bandwidth request; and receive a first DL data block in a DL allocation provided to the first wireless mobile station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A system of duplexing transmission in a wireless communication network, comprising:
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a base station operable to set up a frame for wireless transmission over a communication link to and from a plurality of wireless mobile stations, establish uplink (UL) grants based on bandwidth requests received from the plurality of wireless mobile stations and on communication resources allocated in the frame to uplink transmissions, establish downlink (DL) allocations based on the amount of DL data awaiting downlink transmission at the base station and on the communication resources allocated in the frame to downlink transmissions, and transmit to the plurality of wireless mobile stations an allocation indication with the UL grants and DL allocations; and a first wireless mobile station of the plurality of wireless mobile stations operable to associate data received from a plurality of data sources with a queue, transmit a bandwidth request to the base station, and set an initial value of a timer in association with the transmitting of the bandwidth request, receive from the base station an UL grant in response to the bandwidth request and transmit an UL data block in accordance with the UL grant, and receive a DL data block in a DL allocation provided by the base station. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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Specification