Methods and apparatuses for recovering data packet flow control against radio base station buffer run away
First Claim
1. A recovery control method for recovering data packet flow control between a network node and a radio base station over a radio network interface, the base station communicating with at least one user equipment, UE, over a radio interface, the method implemented in the network node and comprising:
- obtaining measurement information relating to a data transmission rate over the radio interface from the radio base station to the at least one UE and an amount of data queued in a downlink packet queue in the base station for transmission to the at least one UE;
processing the measurement information, by a process controller in the network node, to determine a desired amount of data to be queued in the downlink packet queue;
determining, by the process controller, a commanded bit rate to transmit data from the network node to the downlink packet queue over the radio network interface, based on the determined desired amount, wherein the process controller performs linear time invariant process control to determine the commanded bit rate; and
transmitting, by the network node, data to the radio base station in accordance with the commanded bit rate.
1 Assignment
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Accused Products
Abstract
Recovery control is provided for recovering data packet flow control between a network node (14) and a radio base station (18) over a radio network interface (2). The base station communicates with at least one user equipment, UE, (10) over a radio interface (3) and measures information relating to a data transmission rate over the radio interface and an amount of a downlink packet queue (22) in the base station associated with the UE communication. In one embodiment, the base station sends at least some of the measurement information to the network node. A process controller (52, 40, 84) in the network node processes the measurement information to determine a desired amount to be stored in the downlink packet queue. The process controller determines a commanded bit rate to transmit data from the network node to the downlink packet queue based on the determined desired amount and transmits data to the radio base station in accordance with the commanded bit rate.
6 Citations
26 Claims
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1. A recovery control method for recovering data packet flow control between a network node and a radio base station over a radio network interface, the base station communicating with at least one user equipment, UE, over a radio interface, the method implemented in the network node and comprising:
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obtaining measurement information relating to a data transmission rate over the radio interface from the radio base station to the at least one UE and an amount of data queued in a downlink packet queue in the base station for transmission to the at least one UE; processing the measurement information, by a process controller in the network node, to determine a desired amount of data to be queued in the downlink packet queue; determining, by the process controller, a commanded bit rate to transmit data from the network node to the downlink packet queue over the radio network interface, based on the determined desired amount, wherein the process controller performs linear time invariant process control to determine the commanded bit rate; and transmitting, by the network node, data to the radio base station in accordance with the commanded bit rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of operation in a radio base station communicating with at least one user equipment, UE, over a radio interface, the method in the radio base station comprising:
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activating a recovery control method for recovering data packet flow control over a radio network interface between the radio base station and a network node providing data packets to the radio base station for transmission to the at least one UE over the radio interface, when a dwell time of such data packets in a downlink packet queue of the radio base station exceeds a first dwell time threshold; and deactivating the recovery control method when the dwell time is less than a second dwell time threshold or an amount of data in the downlink packet queue is less than a data amount threshold; and wherein the recovery control method comprises; measuring information relating to a data transmission rate over the radio interface from the radio base station to the at least one UE and the amount of data in the downlink packet queue; sending the measurement information to the network node; and receiving data from the network node at a commanded bit rate that is based on the measurement information such that a desired amount of data for transmission to the at least one UE is queued in the downlink packet queue. - View Dependent Claims (11, 12, 13)
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14. Apparatus for a network node for recovering data packet flow control between the network node and a radio base station over a radio network interface, the base station communicating with at least one user equipment, UE, over a radio interface, and the network node apparatus comprising:
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one or more processors configured to process measurement information relating to a data transmission rate over the radio interface from the radio base station to the at least one UE and an amount of data queued in a downlink packet queue in the base station for transmission to the at least one UE, to determine a desired amount of data to be queued in the downlink packet queue and to determine a commanded bit rate to transmit data from the network node to the downlink packet queue based on the determined desired amount, wherein the one or more processors are configured to perform linear time invariant process control to determine the commanded bit rate, and a transmitter configured to transmit data to the radio base station in accordance with the commanded bit rate. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. An apparatus for a radio base station configured for communicating with at least one user equipment, UE, over a radio interface, the radio base station apparatus comprising:
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one or more processors configured to; activate a recovery control operation for recovering data packet flow control over a radio network interface between the radio base station and a network node providing data packets to the radio base station for transmission to the at least one UE over the radio interface, when a dwell time of such data packets in a downlink packet queue of the radio base station exceeds a first dwell time threshold; and deactivate the recovery control method when the dwell time is less than a second dwell time threshold or an amount of data in the downlink packet queue is less than a data amount threshold; and wherein, for the recovery control operation, the one or more processors are configured to; measure information relating to a data transmission rate over the radio interface from the radio base station to the at least one UE and the amount of data in the downlink packet queue in the base station; send, via a transmitter, a message including the measurement information to the network node; and receive, via a receiver, data from the network node at a commanded bit rate based on the measurement information such that a desired amount of data for transmission to the at least one UE is queued in the downlink packet queue. - View Dependent Claims (25, 26)
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Specification