Communication method and apparatus using beamforming

Patent metadata

Field	Value
Publication number	US-2016150435-A1
Application number	US-201514952299-A
Country	US
Kind code	A1
Filing date	Nov 25, 2015
Priority date	Nov 26, 2014
Publication date	May 26, 2016
Grant date	—

Abstract

The present disclosure relates to a pre-5 th -generation (5G) or 5G communication system to be provided for supporting higher data rates beyond 4 th -generation (4G) communication system such as long term evolution (LTE). A communication method and apparatus using beamforming are provided. The method includes acquiring transmission beam specific, measurement information of a base station (BS) and measuring a reference signal (RS) transmitted through transmission beams of the BS according to the transmission beam specific, measurement information. The measurement information on each transmission beam is determined according to at least one of an elevation angle of the corresponding transmission beam, an azimuth of the corresponding transmission beam, a handover urgency, information on a handover failure, and information on a radio link failure (RLF). A mobile station (MS) may perform a measurement report or a handover process according to a result of the measurement.

First claim

What is claimed is:

1 . A communication method using beamforming, the communication method comprising:
receiving a measurement report generated according to transmission beam specific, measurement information of a base station (BS) from a mobile station (MS), wherein the measurement information on each transmission beam is determined according to at least one of:
an elevation angle of the corresponding transmission beam,
an azimuth of the corresponding transmission beam,
a handover urgency,
information on a handover failure, and
information on a radio link failure (RLF).

2 . The communication method of claim 1 , wherein the measurement information on each transmission beam includes an event indicating at least one of:
a trigger condition for transmission of the measurement report, a time to trigger (TTT) indicating a time which meets a condition of an event for triggering the transmission of the measurement report, an offset value applied for evaluation of a serving cell with respect to the event, a hysteresis value applied for evaluation of a neighboring cell to trigger the transmission of the measurement report, a first layer and/or a second layer filtering condition for a measurement value of a reference signal (RS), a first layer measurement period for measuring the RS and a number of measurement samples, an elevation angle and/or an azimuth of the transmission beam, and a handover urgency of the transmission beam.

3 . The communication method of claim 1 , further comprising:
receiving a message for requesting a change in measurement information from the MS, wherein the message for requesting the change in the measurement information includes at least one of:
a measurement report capability for at least one transmission beam,
the information on the RLF, and
the information on the handover failure.

4 . The communication method of claim 1 , wherein, among transmission beams having different elevation angles, at least one transmission beam having an elevation angle larger than a threshold value has a lower measurement parameter set compared to at least one transmission beam having an elevation angle equal to or smaller than the threshold value.

5 . The communication method of claim 1 , wherein, among transmission beams having different elevation angles, at least one transmission beam included in a boundary of a sector has a lower measurement parameter set compared to at least one transmission beam included in the center of the sector.

6 . The communication method of claim 1 , further comprising:
generating a message including the transmission beam specific, measurement information; and transmitting the message to the MS.

7 . The communication method of claim 6 , wherein the message includes:
an identity of a transmission beam or a transmission beam group, and information indicating a measurement parameter set applied to the transmission beam or the transmission beam group.

8 . A communication method using beamforming, the communication method comprising:
acquiring transmission beam specific, measurement information of a base station (BS); and measuring a reference signal (RS) transmitted through transmission beams of the BS according to the transmission beam specific, measurement information, wherein the measurement information on each transmission beam is determined according to at least one of:
an elevation angle of the corresponding transmission beam,
an azimuth of the corresponding transmission beam,
a handover urgency,
information on a handover failure, and
information on a radio link failure (RLF).

9 . The communication method of claim 8 , wherein the measurement information on each transmission beam includes an event indicating at least one of:
a trigger condition for transmission of the measurement report, a time to trigger (TTT) indicating a time which meets a condition of an event for triggering the transmission of the measurement report, an offset value applied for evaluation of a serving cell with respect to the event, a hysteresis value applied for evaluation of a neighboring cell to trigger the transmission of the measurement report, a first layer and/or a second layer filtering condition for a measurement value of an RS, a first layer measurement period for measuring the RS and a number of measurement samples, an elevation angle and/or an azimuth of the transmission beam, and a handover urgency of the transmission beam.

10 . The communication method of claim 8 , further comprising:
transmitting a message for requesting a change in measurement information to the BS, wherein the message for requesting the change in the measurement information includes at least one of:
a measurement report capability for at least one transmission beam,
the information on the RLF, and
the information on the handover failure.

11 . The communication method of claim 8 , wherein, among transmission beams having different elevation angles, at least one transmission beam having an elevation angle larger than a threshold value has a lower measurement parameter set compared to at least one transmission beam having an elevation angle equal to or smaller than the threshold value.

12 . The communication method of claim 8 , wherein, among transmission beams having different elevation angles, at least one transmission beam included in a boundary of a sector has a lower measurement parameter set compared to at least one transmission beam included in the center of the sector.

13 . The communication method of claim 8 , further comprising receiving a message including the transmission beam specific, measurement information from the BS.

14 . The communication method of claim 13 , wherein the message includes:
an identity of a transmission beam or a transmission beam group, and information indicating a measurement parameter set applied to the transmission beam or the transmission beam group.

15 . The communication method of claim 8 , further comprising performing a measurement report or a handover process according to a result of the measurement of the RS.

16 . A base station (BS) apparatus for performing communication by using beamforming, the BS apparatus comprising:
a receiver configured to receive a signal from a mobile station (MS); and a controller configured to acquire a measurement report generated by the MS according to transmission beam specific, measurement information of the BS from the received signal, wherein the measurement information on each transmission beam is determined according to at least one of:
an elevation angle of the corresponding transmission beam,
an azimuth of the corresponding transmission beam,
a handover urgency,
information on a handover failure, and
information on a radio link failure (RLF).

17 . The BS apparatus of claim 16 , wherein the measurement information on each transmission beam includes an event indicating at least one of:
a trigger condition for transmission of the measurement report, a time to trigger (TTT) indicating a time which meets a condition of an event for triggering the transmission of the measurement report, an offset value applied for evaluation of a serving cell with respect to the event, a hysteresis value applied for evaluation of a neighboring cell to trigger the transmission of the measurement report, a first layer and/or a second layer filtering condition for a measurement value of a reference signal (RS), a first layer measurement period for measuring the RS and a number of measurement samples, an

Assignees

• Samsung Electronics Co Ltd

Inventors

• Baek Sang-Kyu
• Chang Young-Bin
• Kwon Sang-Wook
• Mok Young-Joong
• Hwang June

Classifications

• H04W24/10 Primary

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title

• H04B7/0608

  Antenna selection according to transmission parameters · CPC title

• H04W36/0085

  Hand-off measurements · CPC title

• H04B7/0617 Primary

  for beam forming · CPC title

• H04W36/305

  Handover due to radio link failure (control signalling for hand-off failure H04W36/0079) · CPC title