Adaptive power control for multicast transmission
AssigneeNokia Corporation
InventorsSinikka Sarkkinen, Jari Isokangas, Dimitris Koulakiotis
Life of this patent
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Abstract
The power level of multicast data transmissions in a wireless communications network are controlled. Power level information is provided in a transmitted channel received by a user equipment. The user equipment measures the power level of a received signal. It compares the measured power level to the power level indicated by the power level information provided in the transmitted channel. Power level measurement information is included in a message sent by the user equipment depending on the results obtained when the power level measured by the user equipment is compared to the power level indicated by the power level information provided in the transmitted channel.
Claims29
A method of controlling the power level of multicast data transmissions in a wireless communications network, comprising:
- providing power level information in a transmitted channel received by a user equipment;
- measuring the power level of a signal received by said user equipment;
- comparing the power level measured by the user equipment to the power level indicated by said power level information provided in said transmitted channel;
- and
- including power level measurement information in a message sent by said user equipment depending on the results obtained when the power level measured by said user equipment is compared to the power level indicated by said power level information provided in said transmitted channel.
A method according to claim 3, wherein the message sent by said user equipment if the power level measured by said user equipment is less than the power level indicated by said power level information provided in said transmitted channel is an Multicast Power Indication message.
12 A method according to claim 1, wherein said wireless communication network changes the power level of multicast data transmissions based on the power level measurement information included in a message sent by said user equipment.
A method according to claim 12, wherein the power level of said multicast data transmissions is less than the maximum power level required for all user equipments in the wireless communication network.
A method according to claim 12, further comprising tracking the location of user equipments in the wireless communication network.
A user equipment for receiving multicast data transmissions in a wireless communications network, said user equipment adapted to carry out a power level control method comprising:
- receiving power level information in a transmitted channel;
- measuring the power level of a received signal;
- comparing the measured power level to the power level indicated by said power level information provided in said transmitted channel;
- and
- including power level measurement information in a message depending on the results obtained when the power level measured by said user equipment is compared to the power level indicated by said power level information provided in said transmitted channel.
A network element in a wireless communication network, said network element performing a method comprising:
- providing power level information in a downlink channel transmitted to user equipment in said wireless communication network;
- receiving a message from user equipment, said message including power level measurement information indicating the results of a comparison of the power level measured by said user equipment to the power level indicated by said power level information provided in said transmitted channel;
- and
- controlling the power level of multicast data transmissions based on said message.
Dependencies are inferred from the claim text.