Downlink signal pre-correction method and device
AssigneeDatang Mobile Communications Equipment Co., Ltd.
InventorsYujing FAN, Yuetan CHEN
Life of this patent
Estimating the term…
Abstract
A method and a device for pre-correction of a downlink signal are provided. The method comprises: on the basis of an obtained uplink frequency offset value of a first RRU and a second RRU corresponding to each client, determining a set of uplink frequency offset values corresponding to each RRU; when a downlink pre-correction period is reached, calculating an average uplink frequency offset value of the RRU; and on the basis of the average uplink frequency offset value of the RRU and a downlink pre-correction value in a previous pre-correction period, determining a downlink pre-correction value of the RRU in the current downlink pre-correction period.
Claims10
A method for pre-correcting a downlink signal, comprising:
- obtaining uplink frequency shifts of a first Remote Radio Unit (RRU) and a second RRU corresponding to each client respectively, wherein the first RRU is an RRU of the client operating at the highest power, and the second RRU is an RRU of the client operating at the second highest power;
- determining a set of uplink frequency shifts corresponding to each RRU respectively based upon the uplink frequency shifts of the first RRU and the second RRU corresponding to each client, wherein a set of uplink frequency shifts corresponding to an RRU comprises uplink frequency shifts of the first RRUs or the second RRUs corresponding to all clients operating with the RRU;
- and
- upon determining that a downlink pre-correction periodicity arrives, performing respectively for each RRU the operations of:
- calculating an average uplink frequency shift of the RRU based upon the uplink frequency shifts, of the first RRUs or the second RRUs corresponding to all clients operating with the RRU, in the set of frequency shifts of the RRU, and obtaining a downlink pre-correction value of the RRU in a last pre-correction periodicity;
- and
- determining a downlink pre-correction value of the RRU in a current downlink pre-correction periodicity based upon the average uplink frequency shift of the RRU and the downlink pre-correction value of the RRU in the last pre-correction periodicity.
A device for pre-correcting a downlink signal, comprising:
- an obtaining unit configured to obtain uplink frequency shifts of a first Remote Radio Unit (RRU) and a second RRU corresponding to each client respectively, wherein the first RRU is an RRU of the client operating at the highest power, and the second RRU is an RRU of the client operating at the second highest power;
- a determining unit configured to determine a set of uplink frequency shifts corresponding to each RRU respectively based upon the uplink frequency shifts of the first RRU and the second RRU corresponding to each client, wherein a set of uplink frequency shifts corresponding to an RRU comprises uplink frequency shifts of the first RRUs or the second RRUs corresponding to all the clients operating with the RRU;
- and
- a performing unit configured, upon determining that a downlink pre-correction periodicity arrives, to perform respectively for each RRU the operations of:
- calculating an average uplink frequency shift of the RRU based upon the uplink frequency shifts, of the first RRUs or the second RRUs corresponding to all clients operating with the RRU, in the set of frequency shifts of the RRU, and obtaining a downlink pre-correction value of the RRU in a last pre-correction periodicity;
- and
- determining a downlink pre-correction value of the RRU in a current downlink pre-correction periodicity based upon the average uplink frequency shift of the RRU and the downlink pre-correction value of the RRU in the last pre-correction periodicity.
Dependencies are inferred from the claim text.