US 8,576,719 B2Granted

System and method for dynamically balancing a maximum number of active remote device users between base stations

AssigneeClearwire IP Holdings LLC

InventorsEsmael Dinan, Jong-Hak Jung, Swati Tiwari, Hemanth Pawar, Krishna Sitaram

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Abstract

Both a system and method are provided for dynamically balancing a maximum number of active remote device users that can be serviced between first and second base stations transmitting data frames in a radio communication system when the carriers of the first and second base stations operate at different radio frequency bandwidths X and Y respectively, and Y is substantially larger than X. The system includes a system control circuit that controls the number of subchannels in the uplink control channel region of the data frames transmitted by the first base station, and a traffic monitoring circuit that monitors both an uplink load and a number of active wireless device users within broadcast coverage of said first base station. The system control circuit dynamically increases the radio resources in the uplink control channel region of the frames transmitted by the first base station.

Claims14

Dependent claims

A system for dynamically balancing a maximum number of active remote device users that can be serviced between first and second base stations transmitting data frames via carriers in a radio communication system, wherein the carriers of the first and second base stations operate at different radio frequency bandwidths X and Y respectively, wherein Y is substantially larger than X, comprising:

a system control circuit that controls an amount of radio resources in an uplink control channel region of the data frames transmitted by the first base station, and
a traffic monitoring circuit that monitors a number of active wireless device users within broadcast coverage of said first base station,
wherein the system control circuit increases the amount of radio resources in the uplink control channel region of the frames transmitted by said first base station to increase the number of users that said first base station can support to equal or at least approach a maximum number of users the second base station can support when the number of active wireless device users of the first base station exceeds a first preselected number,
wherein the traffic monitoring circuit also monitors an uplink load for said first base station, and the system control circuit increases the amount of radio resources in the uplink control channel region of the frames transmitted by the first base station when the number of active wireless device users exceeds said first preselected number and said uplink load is below a first preselected threshold indicative of a low load condition,
wherein the system control circuit refrains from increasing the amount of radio resources in the uplink control channel region of the frames transmitted by the first base station when the number of active wireless device users exceeds said first preselected number and said uplink load is above a second preselected threshold indicative of a high load condition, and
wherein the system control circuit increases the amount of radio resources in the uplink control channel region of the frames transmitted by the first base station when the uplink load is between said first and second thresholds, the number of active wireless device users exceeds said first preselected number, and a number of uplink bursts transmitted for a lowest modulation control scheme divided by a total number of bursts is less than a preselected percentage, but refrains from increasing the amount of radio resources in the uplink control channel region when said number of uplink bursts transmitted for the lowest modulation control scheme divided by the total number of bursts is equal to or greater than said preselected percentage.

3 more elements

A method for dynamically balancing a maximum number of active remote device users between first and second base stations in a radio communication system having broadcast coverage via carriers operating at radio frequency bandwidths X and Y respectively, wherein Y is substantially larger than X, and wherein the carriers of the first and second base stations transmit data frames, each of which includes an uplink control channel region and an uplink channel region, comprising:

monitoring a number of active wireless device users within the broadcast coverage of said first base station,
increasing an amount of radio resources in the uplink control channel region of the frames transmitted by said first base station to increase the number of users that said first base station can support to equal or at least approach a maximum number of users the second base station can support when the number of active wireless device users of the first base station exceeds a first preselected number,
monitoring an uplink load for said first base station operating at frequency bandwidth X, and increasing the amount of radio resources in the uplink control channel region of the frames transmitted by the first base station when the number of active wireless device users exceeds said first preselected number and said uplink load is below a first preselected threshold indicative of a low load condition,
refraining from increasing the amount of radio resources in the uplink control channel region of the frames transmitted by the first base station when the number of active wireless device users exceeds said first preselected number and said uplink load is above a second preselected threshold indicative of a high load condition, and
increasing the amount of radio resources in the uplink control channel region of the frames transmitted by the first base station when the uplink load is between said first and second thresholds only when a number of uplink bursts transmitted for a lowest modulation control scheme divided by a total number of bursts is less than a preselected percentage and the number of active wireless device users exceeds said first preselected number.

2 more elements

A method for dynamically balancing a maximum number of active remote device users between first and second base stations in a radio communication system having broadcast coverage via carriers operating at radio frequency bandwidths X and Y respectively, wherein Y is substantially larger than X, and wherein the first and second base station carriers transmit data frames, each of which includes an uplink control channel region and an uplink channel region, comprising:

monitoring both an uplink load and a number of active wireless device users within the broadcast coverage of said first base station,
increasing a number of subchannels in the uplink control channel region of the frames transmitted by said first base station to increase the number of users that said first base station can support to equal or at least approach a maximum number of users the second base station can support when the number of active wireless device users of said first base station exceeds a first preselected number and said monitored uplink load is below a first preselected threshold indicative of a low load condition, and
increasing the number of subchannels in the uplink control channel region of the frames transmitted by the first base station when the uplink load is between the first preselected threshold and a second preselected threshold indicative of a high load condition only when a number of uplink bursts transmitted for a lowest modulation control scheme divided by a total number of bursts is less than a preselected percentage and the number of active wireless device users exceeds said first preselected number.

Dependencies are inferred from the claim text.