Method for uplink-downlink interference mitigation in heterogeneous network

Patent metadata

Field	Value
Publication number	US-10021700-B2
Application number	US-201214400427-A
Country	US
Kind code	B2
Filing date	May 11, 2012
Priority date	May 11, 2012
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

Communication systems, such as the long term evolution (LTE) advanced (LTE-A) of the third generation partnership project (3 GPP) may benefit from various enhancements. These enhancements can include LTE time division duplex (TDD) enhancements for traffic adaptation and uplink (UL)-downlink (DL) interference management. A method can include determining whether a first cell, in a network including the first cell and a second cell, autonomously selects a time division duplex uplink-downlink configuration. The method can also include sending an authority indicator to a base station of the first cell regarding a determination of whether the first cell is to autonomously select the configuration.

First claim

What is claimed is:

1. A method comprising:
determining, by a base station of a first cell based on information from a base station of a second cell, whether the base station of the first cell is to control a time division duplex uplink-downlink configuration;
applying, by the base station of the first cell, a selected time division duplex uplink-downlink configuration based on the information; and
providing, by the base station of the first cell, at least one of traffic load information and current and intended/suggested time division duplex uplink-downlink configuration to the base station of the second cell when the base station of the first cell is not to control the configuration.

2. The method of claim 1 , wherein the traffic load information comprises at least one of an instantaneous traffic ratio between downlink and uplink, an amount of data available waiting for scheduling in downlink and uplink, or a traffic ratio during predefined statistic time scale.

3. The method of claim 1 , wherein the providing the traffic load information comprises sending the traffic load information periodically or based on triggering.

4. A base station of a first cell, the base station comprising:
at least one processor; and
at least one memory including computer program code,
wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the base station of the first cell at least to
determine, based on information from a base station of a second cell, whether the base station of the first cell is to control a time division duplex uplink-downlink configuration;
apply a selected time division duplex uplink-downlink configuration based on the information; and
provide at least one of traffic load information and current and intended/suggested time division duplex uplink-downlink configuration to the base station of the second cell when the base station of the first cell is not to control the configuration.

5. The base station of claim 4 , wherein the traffic load information comprises at least one of an instantaneous traffic ratio between downlink and uplink, an amount of data available waiting for scheduling in downlink and uplink, or a traffic ratio during predefined statistic time scale.

6. The base station of claim 4 , wherein the at least one memory and the computer program code are configured to, with the at least one processor, caused the apparatus at least to provide the traffic load information by sending the traffic load information periodically or based on triggering.

Assignees

• Lei Haipeng
• Shu Kodo
• Lan Yuanrong
• Yao Chunhai
• Lin Jiezhen
• Nokia Solutions & Networks Oy

Inventors

• Lei Haipeng
• Shu Kodo
• Lan Yuanrong
• Yao Chunhai
• Lin Jiezhen

Classifications

• H04W72/541 Primary

  using the level of interference · CPC title

• H04W72/52

  based on load · CPC title

• H04W16/08

  Load shedding arrangements · CPC title

• H04W16/10 Primary

  Dynamic resource partitioning · CPC title

• H04L5/14

  Two-way operation using the same type of signal, i.e. duplex · CPC title