Fast initialization of downlink link adaptation
AssigneeTelefonaktiebolage LM Ericsson (publ)
InventorsDavid SANDBERG, Patrik RASK
Life of this patent
Estimating the term…
Abstract
In a method for downlink link adaptation in a network node in a communication system, the network node serving a cell and active user equipment within the cell, performing the steps of obtaining uplink path gain and downlink SINR for at least a subset of active user equipment in the cell, estimating an initial downlink SINR for new user equipment in the cell, based on an estimated uplink path gain together with a determined statistical measure for the obtained uplink path gain and downlink SINR for the at least a subset of active user equipment in the cell, and utilizing the estimated initial downlink SINR for downlink link adaptation for a subsequent transmission to the new user equipment.
Claims11
A method for downlink link adaptation in a network node in a communication system, said network node serving a cell and active user equipment within said cell, wherein said method comprises:
- obtaining uplink path gain and downlink Signal to Interference and Noise Ratio (SINR) for at least a subset of active user equipment in said cell,
- estimating an initial downlink SINR for new user equipment in said cell, based on an estimated uplink path gain together with a determined statistical measure for said obtained uplink path gain and downlink SINR for said at least a subset of active user equipment in said cell, and
- utilizing said estimated initial downlink SINR for downlink link adaptation for a subsequent transmission to said new user equipment.
A network node configured to serve a cell and active users within said cell wherein said network node is configured to:
- obtain uplink path gain and downlink Signal to Interference and Noise Ratio (SINR) for at least a subset of active user equipment in said cell,
- estimate an initial downlink SINR for new user equipment in said cell, based on an estimated uplink path gain together with a determined statistical measure for said obtained uplink path gain and downlink SINR for said at least a subset of active user equipment in said cell, and
- utilize said estimated initial downlink SINR for downlink link adaptation for a subsequent transmission to said new user equipment.
(canceled)
A network node for serving a cell and active users within said cell wherein said network node comprises:
- an obtaining module configured to obtain uplink path gain and downlink Signal to Interference and Noise Ratio (SINR) for each active user equipment in said cell,
- a grouping module configured to group said obtained downlink SINR into a plurality of path gain bins based on said obtained uplink path gain, each path gain bin corresponding to a respective path gain interval;
- a determining module configured to determine a statistical measure for the downlink SINR in each path gain bin,
- an estimating module configured to, upon entry of a new user equipment into the cell, estimate the uplink path gain for said new user equipment,
- an estimating module configured to estimate an initial downlink SINR for said new user equipment based on said estimated uplink path gain and said determined statistical measure for a corresponding uplink path gain bin, and
- a utilizing module configured to utilize said estimated initial downlink SINR for downlink link adaptation for a subsequent transmission to said new user equipment.
Dependencies are inferred from the claim text.