Increasing CINR gain in a network deploying beam forming

摘要

A method, system, and medium are provided for increasing carrier-to-interference-and-noise ratio (CINR) gain in a long-term-evolution network deploying beam forming (BF) technologies. Adjacent eNodeBs, each serving a respective user equipment (UE) located at the boundary between the two eNodeBs, communicate BF parameters to each other. Each eNodeB uses the received BF parameters to adjust its DL transmission beam in order to decrease the interference at each of the respective UEs. By adjusting the DL transmission beam to decrease interference, CINR gain at the UEs is correspondingly increased.

主权项

1. One or more computer-readable media having computer-executable instructions embodied thereon that, when executed, perform a method of increasing carrier-to-interference-and-noise ratio (CINR) gain in a long-term-evolution (LTE) network deploying beam forming (BF), the LTE network having at least a first eNodeB serving a first user equipment (UE) and a neighboring eNodeB serving a second UE, wherein both the first eNodeB and the neighboring eNodeB utilize BF, the method comprising:
at the first eNodeB
determining a first downlink (DL) transmission beam to establish a communications link with the first UE, the first DL transmission beam characterized by a first set of BF parameters comprising a UE reference signal (UERS), a pre-coding metric indicator (PMI), a sounding reference signal (SRS), weights associated with the first DL transmission beam, a phase associated with the first DL transmission beam, and an amplitude associated with the first DL transmission beam;communicating the first set of BF parameters to the neighboring eNodeB;receiving from the neighboring eNodeB a second set of BF parameters that characterize a second DL transmission beam used by the neighboring eNodeB to establish a communications link with the second UE, the second set of BF parameters comprising a UE reference signal (UERS), a pre-coding metric indicator (PMI), a sounding reference signal (SRS), weights associated with the second DL transmission beam, a phase associated with the second DL transmission beam, and an amplitude associated with the second DL transmission beam; andadjusting the first DL transmission beam to increase the CINR gain at the first UE based on the second set of BF parameters received from the neighboring eNodeB.