Method and apparatus for reducing radio interferences

Patent metadata

Field	Value
Publication number	US-9426682-B2
Application number	US-201214385001-A
Country	US
Kind code	B2
Filing date	Mar 13, 2012
Priority date	Mar 13, 2012
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

The present application relates generally to use of radio resources in a radio access network (RAN) and, in more specific, Full-Duplex (FD) transmission on the same carrier. Due to the mobility of the UEs or the non-optimal grouping, two UEs belonging to different groups may be close to each other while performing transmission and cause serious transmission interferences to 5 each other. This is one of the problems which a method in accordance with the invention aims to solve. When the performing the method a RAN triggers a UE to measure 601 first interferences originated from a first group of UEs. Then the RAN triggers the same UE to measure 602 second interferences originated from a second group of the UEs. Finally, the RAN places 603 the UE into the first group, if the first interferences are higher than the second interferences. The both 10 groups of the UEs are composed of such user equipments which share a group-specific transmission pattern. Uplink and downlink resources of the RAN are scheduled according to a time-division to the UEs, so that simultaneous transmissions are allowed only for such user equipments that belong to different groups. Advantages of the invention are the following: 1) simultaneous transmission and reception is supported in a RAN and in a UE which is either a FD 15 UE or a HD UE, 2) different kinds of interferences are efficiently reduced, and 3) the interferences are measured in a way that saves power.

First claim

What is claimed is:

1. A method of reducing radio interferences, the method comprising the following to be performed in a radio access network:
triggering, by circuitry, a user equipment to measure first interferences originated from a first group of user equipments;
triggering, by the circuitry, the user equipment to measure second interferences originated from a second group of the user equipments, wherein uplink and downlink resources of the radio access network are scheduled according to a time-division, so that simultaneous transmissions are allowed only for such user equipments that belong to different groups; and
placing, by the circuitry, the user equipment into the first group when the first interferences are higher than the second interferences.

2. An apparatus, comprising:
circuitry configured to
measure first interferences originated from a first group of user equipments and measure second interferences originated from a second group of the user equipments, wherein uplink and downlink resources of a radio access network are scheduled according to a time-division, so that simultaneous transmissions are allowed only for such user equipments that belong to different groups; and
report the first interferences and the second interferences to at least one of a base station or a radio access network.

3. The apparatus according to claim 2 , wherein the first interferences are measured using a first measurement pattern and the second interferences are measured using a second measurement pattern.

4. The apparatus according to claim 3 , wherein the apparatus is a user equipment and the circuitry is configured to:
read from the first measurement pattern a measurement period that at least partly overlaps with a transmission period scheduled to the first group.

5. The apparatus according to claim 4 , wherein the circuitry is configured to:
interrupt the measuring of the first interferences when the measurement period ends.

6. The apparatus according to claim 5 , wherein the circuitry is configured to:
continue the measuring during a next measurement period when the first measurement pattern includes the next measurement period.

7. The apparatus according to claim 2 , wherein the reporting includes adding first measurement results describing the first interferences and adding second measurement results describing the second interferences into a measurement report to be sent to the radio access network.

8. The apparatus according to claim 2 , wherein an interference included in the first interferences is measured as power of unwanted signal.

9. An apparatus, comprising:
circuitry configured to
trigger a user equipment to measure first interferences originated from a first group of user equipments;
trigger the user equipment to measure second interferences originated from a second group of the user equipments, wherein uplink and downlink resources of a radio access network are scheduled according to a time-division, so that simultaneous transmissions are allowed only for such user equipments that belong to different groups; and
place the user equipment into the first group when the first interferences are higher than the second interferences.

10. The apparatus according to claim 9 , wherein the first interferences are measured using a first measurement pattern and the second interferences are measured using a second measurement pattern.

11. The apparatus according to claim 10 , wherein the first measurement pattern results in at least one measuring result due to which the first interferences are higher than the second interferences.

12. The apparatus according to claim 10 , wherein the circuitry is configured to:
set into the first measurement pattern a measurement period that at least partly overlaps with a transmission period scheduled to the first group.

13. The apparatus according to claim 9 , wherein the circuitry is configured to:
make a transmission pattern for a Full-Duplex user equipment, the transmission pattern allocating a part of the uplink and downlink resources to the Full-Duplex user equipment.

14. The apparatus according to claim 13 , wherein the transmission pattern discloses a time period that is intended for Full-Duplex transmission and another time period that is intended for Half-Duplex transmission in either uplink or downlink direction.

15. The apparatus according to claim 9 , wherein the circuitry is configured to:
trigger the user equipment to measure third interferences originated from the second group of user equipments.

16. The apparatus according to claim 15 , wherein the circuitry is configured to:
prevent, during at least one time period, simultaneous transmissions of two such user equipments that belong to the different groups when a measuring report is obtained as a response to the triggering and the measuring report indicates high interference.

17. The apparatus according to claim 16 , wherein the circuitry is configured to:
create an interference relationship table on the basis of the measuring report to detect interferences that exceed a predetermined threshold.

18. The apparatus according to claim 15 , wherein the third interferences are at least partly caused by a Full-Duplex user equipment.

19. The apparatus according to claim 15 , wherein the circuitry is configured to:
move the user equipment from the first group into the second group when the third interferences are higher than the first interferences.

20. The apparatus according to claim 9 , wherein
the apparatus is a base station of the radio access network, and
the circuitry is configured to place the user equipment into the first group when the user equipment is located on a coverage area of the base station.

Assignees

• Sun Pengfei
• Gao Xinying
• Wang Haiming
• Gao Chunyan
• Broadcom Corp

Inventors

• Sun Pengfei
• Gao Xinying
• Wang Haiming
• Gao Chunyan

Classifications

• H04W72/541 Primary

  using the level of interference · CPC title

• H04W8/186

  Processing of subscriber group data · CPC title

• H04W72/082

  Electricity · mapped topic

• H04L5/14

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

• H04W24/08 Primary

  Testing, {supervising or monitoring} using real traffic · CPC title