US Patent No. 9,722,678

COORDINATED MULTI-POINT TRANSMISSION METHOD AND EQUIPMENT


Patent No. 9,722,678
Issue Date August 01, 2017
Title Coordinated Multi-point Transmission Method And Equipment
Inventorship Yali Zhao, Beijing (CN)
Zhe Fu, Beijing (CN)
Assignee CHINA ACADEMY OF TELECOMMUNICATIONS TECHNOLOGY, Beijing (CN)

Claim of US Patent No. 9,722,678

1. A coordinated multi-point transmission method, the method comprising:
receiving, by a Coordinated Multi-point (CoMP) serving cell, assistance information transmitted by a CoMP assisting point
via an inter-cell interface, the assistance information is utilized for assisting the CoMP serving cell in making a CoMP decision;

wherein the assistance information comprises:
Reference Signal Receiving Power (RSRP) and/or Reference Signal Receiving Quality (RSRQ) measurement results and their corresponding
cell identifiers, reported by a User Equipment (UE); and Channel State Information (CSI) measurement results in a CoMP measurement
set reported by the UE; wherein the RSRP and/or RSRQ measurement results and their corresponding cell identifiers assist the
CoMP serving cell in determining the CoMP measurement set, and the CSI measurement results in the CoMP measurement set assist
the CoMP serving cell in determining a CoMP cooperating set and a CoMP algorithm; or

RSRP and/or RSRQ measurement results and their corresponding cell identifiers, reported by the UE, wherein the RSRP and/or
RSRQ measurement results and their corresponding cell identifiers assist the CoMP serving cell in determining a CoMP measurement
set; or

a CoMP measurement set determined by the CoMP assisting point from the RSRP and/or RSRQ measurement results and their corresponding
cell identifiers, reported by the UE; and CSI measurement results in the CoMP measurement set reported by the UE; wherein
the CoMP measurement set assists the CoMP serving cell in obtaining the CSI measurement results in the CoMP measurement set,
and the CSI measurement results in the CoMP measurement set assist the CoMP serving cell in determining a CoMP cooperating
set and a CoMP algorithm; or

a CoMP measurement set determined by the CoMP assisting point from the RSRP and/or RSRQ measurement results and their corresponding
cell identifiers, reported by the UE, wherein the CoMP measurement set assists the CoMP serving cell in obtaining CSI measurement
results in the CoMP measurement set or assists the CoMP serving cell in obtaining Sound Reference Signal (SRS) detection results
in the CoMP measurement set; or

CSI measurement results in a CoMP measurement set reported by the UE, wherein the CSI measurement results in the CoMP measurement
set assists the CoMP serving cell in determining a CoMP cooperating set and a CoMP algorithm;

wherein,
in the event that the assistance information comprises the RSRP and/or RSRQ measurement results and their corresponding cell
identifiers, and the CSI measurement results in the CoMP measurement set, the method further comprises:

determining, by the CoMP serving cell, the CoMP measurement set, or determining the CoMP measurement set and measurement configuration
information for CSI measurement in the CoMP measurement set, according to the RSRP and/or RSRQ measurement results and their
corresponding cell identifiers forwarded by the CoMP assisting point, and configuring the UE to make CSI measurement in the
CoMP measurement set, through the CoMP assisting point;

determining, by the CoMP serving cell, the CoMP cooperating set and the CoMP algorithm according to the CSI measurement results
in the CoMP measurement set forwarded by the CoMP assisting point; and

exchanging, by the CoMP serving cell, CoMP information with other CoMP participating cells according to the CoMP cooperating
set and the CoMP algorithm;

or,
in the event that the assistance information comprises the RSRP and/or RSRQ measurement results and their corresponding cell
identifiers, the method further comprises:

determining, by the CoMP serving cell, the CoMP measurement set, or determining the CoMP measurement set and measurement configuration
information for CSI measurement in the CoMP measurement set, according to the RSRP and/or RSRQ measurement results and their
corresponding cell identifiers forwarded by the CoMP assisting point, and configuring the UE to make CSI measurement in the
CoMP measurement set;

determining, by the CoMP serving cell, the CoMP cooperating set and the CoMP algorithm according to CSI measurement results
in the CoMP measurement set reported by the UE; and

exchanging, by the CoMP serving cell, CoMP information with other CoMP participating cells according to the CoMP cooperating
set and the CoMP algorithm;

or,
in the event that the assistance information comprises the RSRP and/or RSRQ measurement results and their corresponding cell
identifiers, the method further comprises:

determining, by the CoMP serving cell, the CoMP measurement set according to the RSRP and/or RSRQ measurement results and
their corresponding cell identifiers, forwarded by the CoMP assisting point;

instructing, by the CoMP serving cell, cells in the CoMP measurement set to detect an SRS, and determining the CoMP cooperating
set and the CoMP algorithm according to SRS detection results by the cells in the CoMP measurement set; and

exchanging, by the CoMP serving cell, CoMP information with other CoMP participating cells according to the CoMP cooperating
set and the CoMP algorithm;

or,
in the event that the assistance information comprises the CoMP measurement set and the CSI measurement results in the CoMP
measurement set, the method further comprises:

obtaining, by the CoMP serving cell, the CSI measurement results in the CoMP measurement set according to the CoMP measurement
set transmitted by the CoMP assisting point;

determining, by the CoMP serving cell, the CoMP cooperating set and the CoMP algorithm according to the CSI measurement results
in the CoMP measurement set, wherein the CSI measurement results are forwarded by the CoMP assisting point after the CoMP
assisting point configuring the UE to make CSI measurement, according to the CoMP measurement set determined by the CoMP assisting
point, and receiving the CSI measurement results reported by the UE; and

exchanging, by the CoMP serving cell, CoMP information with other CoMP participating cells according to the CoMP cooperating
set and the CoMP algorithm;

or,
in the event that the assistance information comprises the CoMP measurement set, the method further comprises:
obtaining, by the CoMP serving cell, the CSI measurement results in the CoMP measurement set according to the CoMP measurement
set transmitted by the CoMP assisting point;

determining, by the CoMP serving cell, the CoMP cooperating set and the CoMP algorithm according to the CSI measurement results
in the CoMP measurement set, wherein the CSI measurement results are measured and reported by the UE after the CoMP assisting
point or the CoMP serving cell configures the UE to make CSI measurement, according to the determined CoMP measurement set;
and

exchanging, by the CoMP serving cell, CoMP information with other CoMP participating cells according to the CoMP cooperating
set and the CoMP algorithm;

or,
in the event that the assistance information comprises the CoMP measurement set, the method further comprises:
instructing, by the CoMP serving cell, cells in the CoMP measurement set to detect an SRS, according to the CoMP measurement
set transmitted by the CoMP assisting point;

determining, by the CoMP serving cell, the CoMP cooperating set and the CoMP algorithm according to SRS detection results
by the cells in the CoMP measurement set

exchanging, by the CoMP serving cell, CoMP information with other CoMP participating cells according to the CoMP cooperating
set and the CoMP algorithm;

or,
in the event that the assistance information comprises the CSI measurement results in the CoMP measurement set, the method
further comprises:

determining, by the CoMP serving cell, the CoMP cooperating set and the CoMP algorithm according to the CSI measurement results
in the CoMP measurement set, wherein the CoMP measurement set is determined by the CoMP serving cell according to SRS detection
results fed back by cells adjacent to the CoMP serving cell at the same frequency after instructing the adjacent cells at
the same frequency to detect an SRS, and the CSI measurement results are transmitted by the UE to the CoMP assisting point,
and then forwarded by the CoMP assisting point to the CoMP serving cell, after the CoMP serving cell determines the CoMP measurement
set, and configures the UE to make CSI measurement in the CoMP measurement set through the CoMP assisting point; and

exchanging, by the CoMP serving cell, CoMP information with other CoMP participating cells according to the CoMP cooperating
set and the CoMP algorithm.