A METHOD AND DEVICE FOR ENABLING DOWNLINK COORDINATED MULTIPOINT COMMUNICATION

摘要

The present disclosure relates to a method and device (10) for enabling downlink (DL) coordinated multipoint (CoMP) communication. In particular it relates to a method of enabling CoMP in legacy user equipments, i.e. devices that only measures and reports the channel quality of the link to its primary serving point. The method comprises the steps receiving the at least one DL channel quality measurement (SI), receiving at least one uplink (UL) measurement of the respective UL channels from the wireless device to one of the multiple access points (S2), and estimating a coordinated DL multipoint channel quality of a coordinated multipoint channel corresponding to one or more different coordinated transmission states of the access points, based on the at least one DL channel quality measurement and the received UL measurements, by assuming that the DL path gains from the multiple access points to the wireless device are proportional to the UL path gains to the multiple access points for respective access point, thereby predicting link quality of inter-access-points-coordinated DL multipoint transmissions from the access points.

主权项

1. A method, in a node in a cellular communication system, of enabling downlink coordinated multipoint communication between a wireless device and multiple access points, the wireless device reporting at least one downlink channel quality measurement of one downlink channel from one of the multiple access points to the wireless device, the method comprising the following steps:
receiving the at least one downlink channel quality measurement; receiving at least one uplink measurement of the respective uplink channels from the wireless device to one of the multiple access points; and estimating a coordinated downlink multipoint channel quality of a coordinated multipoint channel corresponding to one or more different coordinated transmission states of the access points, based on the at least one downlink channel quality measurement and the received uplink reference measurements, by assuming that the downlink path gains from the multiple access points to the wireless device are proportional to the uplink path gains to the multiple access points for respective access point, thereby predicting link quality of inter-access-points-coordinated downlink multipoint transmissions from the access points.