Dynamic, distributed coordination of parameters in a cellular telecommunication network

Patent metadata

Field	Value
Publication number	US-9154974-B2
Application number	US-201113072496-A
Country	US
Kind code	B2
Filing date	Mar 25, 2011
Priority date	Mar 25, 2011
Publication date	Oct 6, 2015
Grant date	Oct 6, 2015

Abstract

An apparatus, system, and method for dynamic, distributed coordination of parameters between a plurality of base stations in a cellular telecommunication network. An inter-cell communication interface connecting each given base station with the given base station's neighboring base stations is extended to communicate parameter settings between the given base station and the neighboring base stations. An apparatus in each given base station receives from the given base station's neighboring base stations, parameter settings being utilized by the neighboring base stations for transmitting and/or receiving in associated neighboring cells. The apparatus utilizes the parameter settings received from the neighboring base stations as factors to determine local parameter settings for the given base station. The given base station then sends the local parameter settings and supplemental information to the neighboring base stations so that optimal network-wide parameter settings can be selected.

First claim

What is claimed is:

1. An apparatus in a first base station for dynamic, distributed coordination of physical-layer transmission parameters between the first base station and a plurality of neighboring base stations in a cellular telecommunication network, the apparatus comprising:
a processor that controls the operation of the apparatus when executing computer program instructions stored on a non-transitory memory device, wherein the processor controls the following components of the apparatus:
an interface unit configured to receive from the neighboring base stations, parameter settings for the transmission parameters being utilized by the neighboring base stations for transmitting and/or receiving radio signals with User Equipments (UEs) in associated neighboring cells;
a neighbor list updater configured to dynamically update a neighbor list of the neighboring base stations;
a parameter computer that utilizes the parameter settings received from the neighboring base stations as factors to determine local parameter settings for the transmission parameters for use by the first base station for transmitting and/or receiving radio signals in a first cell associated with the first base station; and
a supplementary information computer that utilizes the local parameter settings and the parameter settings received from the neighboring base stations as factors to dynamically compute supplementary information for computing a path gain matrix (G) shared by the first base station and the neighboring base stations;

wherein the processor also controls the interface unit to send the local parameter settings and the supplementary information to the neighboring base stations on the neighbor list;
wherein the processor controls the components of the apparatus to iteratively perform the following exchange multiple times with the neighboring base stations in the neighbor list until a convergence condition is satisfied:
reception of the parameter settings from the neighboring base stations, and
transmission of the local parameter settings and the supplementary information to the neighboring base stations;

wherein the first base station and the neighboring base stations utilize the supplementary information to determine which base stations are dominant downlink interferers and to select parameter settings for optimal performance of the entire network; and
wherein each neighboring base station includes its own apparatus performing the same functions as the apparatus in the first base station.

2. The apparatus as recited in claim 1 , wherein:
the neighbor list updater adds a given base station to the neighbor list whenever path gain measurements from the first base station and the given base station indicate the given base station is a dominant downlink interferer; and
the neighbor list updater removes the given base station from the neighbor list whenever the path gain measurements from the first base station and the given base station indicate the given base station is not a dominant downlink interferer.

3. The apparatus as recited in claim 1 , wherein the supplementary information exchanged between the base stations also includes at least one of:
preference information regarding parameter settings of immediately adjacent neighboring base stations; and
information for coordinating the timing of updates among a plurality of base stations.

4. The apparatus as recited in claim 1 , wherein the path gain matrix (G) is given by:

G
=

[

g
11

g
12

…

…

g

1
⁢
N

g
21

g
22

…

…

g

2
⁢

⁢
N

⋮

⋮

⋱

⋮

⋮

⋮

⋱

⋮

g

M
⁢

⁢
1

g

M
⁢

⁢
2

…

…

g
MN

]

,

where g mn is the path gain between the m'th UE and the n'th base station; and
wherein the apparatus is configured to determine whether a given base station is a dominant interferer for a given UE by comparing the ratio between the path gain of the given b

Assignees

• Guey Jiann-Ching
• Hui Dennis
• Ericsson Telefon Ab L M

Inventors

• Guey Jiann-Ching
• Hui Dennis

Classifications

• H04W16/10

  Dynamic resource partitioning · CPC title

• H04W24/02 Primary

  Arrangements for optimising operational condition · CPC title