Cognitive flow control based on channel quality conditions
A system and method which improve the performance of a wireless transmission system by intelligent use of the control of the flow of data between a radio network controller (RNC) and a Node B. The system monitors certain criteria and, if necessary, adaptively increases or decreases the data flow between the RNC and the Node B. This improves the performance of the transmission system by allowing retransmitted data, signaling procedures and other data to be successfully received at a faster rate, by minimizing the amount of data buffered in the Node B. Flow control is exerted to reduce buffering in the Node B upon degradation of channel qualities, and prior to a High Speed Downlink Shared Channel (HS-DSCH) handover.
1. A method performed by a wireless device having a buffer, the method comprising:
monitoring an amount of data within the buffer and determining whether it is acceptable for additional data to be sent to the wireless device;
calculating a capacity allocation associated with the wireless device;
transmitting the capacity allocation to a network device; and
receiving data at the wireless device in response to the transmitted capacity allocation, wherein an amount of the received data is equal to or less than the capacity allocation.
2. The method of claim 1 wherein the buffer comprises a plurality of buffers or sub-buffers.
3. The method of claim 1 further comprising:
calculating a channel quality index (CQI) associated with the wireless device, wherein the capacity allocation is based on the CQI.
4. A wireless device comprising:
a buffer;
a processor configured to monitor an amount of data within the buffer and determine whether it is acceptable for additional data to be sent to the wireless device;
a transmitter configured to transmit a capacity allocation to a network device; and
a receiver configured to receive data in response to the capacity allocation, wherein an amount of the received data is equal to or less than the capacity allocation.
5. The wireless device of claim 4 wherein the buffer comprises a plurality of buffers or sub-buffers.
6. The wireless device of claim 4 wherein the processor is further configured to calculate a channel quality index (CQI) associated with the wireless device, and wherein the capacity allocation is based on the CQI.