Electronic device in wireless communication system and wireless communication method

Patent metadata

Field	Value
Publication number	US-10687258-B2
Application number	US-201615758222-A
Country	US
Kind code	B2
Filing date	Sep 19, 2016
Priority date	Sep 21, 2015
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

An electronic device in a wireless communication system and a wireless communication method, including plural cells including current cells and at least one neighbouring cell. The electronic device includes: a transceiver; a first trigger circuit configured to enable the transceiver to conduct a first measurement report, to assist in starting a relay process for enabling the electronic device to communicate with a current cell via a relay user equipment; a second trigger circuit configured to enable the transceiver to conduct a second measurement report, to assist in starting a handover process for enabling the electronic device to be switched from the current cell to the neighbouring cell; and one or more processing circuits configured to control the first and second trigger circuits, to enable the transceiver to conduct the first measurement report before conducting the second measurement report.

First claim

The invention claimed is:

1. An electronic device in a wireless communication system, wherein the wireless communication system comprises a plurality of cells comprising a current cell in which the electronic device is located and at least one neighbor cell, and the electronic device comprises:
a transceiver; and
one or more processing circuits configured to:
determine if a relay entering condition is satisfied based on a measurement result of the current cell and a measurement result of the neighbor cell;
start a relay process for causing the electronic device to communicate with the current cell via a relay user equipment if the relay entering condition is determined to be satisfied;
determine if a handover entering condition is satisfied based on the measurement result of the current cell and the measurement result of the neighbor cell; and
start a handover process for causing the electronic device to hand over from the current cell to the neighbor cell if the handover entering condition is determined to be satisfied,

wherein the relay entering condition and the handover entering condition are configured so that the relay process is started prior to the handover process.

2. The electronic device according to claim 1 , the electronic device further comprising:
a first trigger circuit configured to cause the transceiver to perform a first measurement report when the relay entering condition is determined to be satisfied;
a second truer circuit configured to cause the transceiver to perform a second measurement report when the handover entering condition is determined to be satisfied,
wherein the second measurement report is a measurement report for an A3 event, and
wherein the processing circuit is further configured to start timing for the second trigger circuit when it is determined that the handover entering condition is satisfied and to rest the timing for the second trigger circuit when it is determined that a handover leaving condition is satisfied, and
wherein the transceiver is caused to perform the second measurement report when a result of the timing of the second trigger circuit reaches a first trigger time.

3. The electronic device according to claim 2 , wherein the first measurement report is a measurement report for a relay event,
wherein the processing circuit is further configured to start timing for the first trigger circuit when it is determined that the relay entering condition is satisfied and to reset the timing for the first trigger circuit when it is determined that a relay leaving condition is satisfied, and
wherein the transceiver is caused to perform the first measurement report when a result of the timing of the first trigger circuit reaches a second trigger,
wherein the processing circuit configures the relay entering condition such that the first trigger circuit starts timing prior to the second trigger circuit, and
wherein the processing circuit configures the relay leaving condition such that the first trigger circuit is reset posterior to the second trigger circuit.

4. The electronic device according to claim 3 , wherein the measurement results of the current cell and the neighbor cell are based on a Reference Signal Receiving Power (RSRP) received by the transceiver from the current cell and the neighbor cell.

5. The electronic device according to claim 3 , wherein the processing circuit is further configured to:
scale related parameters influencing a hysteresis effect of the A3 event with a scaling parameter to set related parameters for a hysteresis effect of the relay event in a manner such that the transceiver is caused to perform the first measurement report prior to the second measurement report; and
determine the scaling parameter based on indication information from a base station.

6. The electronic device according to claim 3 , wherein the processing circuit is further configured to:
set a hysteresis parameter in the relay entering condition as x times of a hysteresis parameter in the handover entering condition for the A3 event; and
set a hysteresis parameter in the relay leaving condition as 1+x times of a hysteresis parameter in the handover leaving condition for the A3 event,
where x is a real number within a range of 0 to 1.

7. The electronic device according to claim 3 , wherein the processing circuit s further configured to set the second trigger time to be x times the first trigger time,
Where x is a real number within a range of 0 to 1.

8. The electronic device according to claim 3 , wherein the processing circuit is further configured to adjust the first trigger time to be 1-x times, where x is a real number within a range of 0 to 1, when it is determined that the neighbor cell that satisfies the relay entering condition is same as the neighbor cell that satisfies the handover entering condition for the A3 event.

9. The electronic device according to claim 1 , wherein the processing circuit is further configured to:
control the first and second trigger circuits based on information indicating the relay user equipment received by the transceiver so as to communicate with the current cell via the relay user equipment before handing over from the current cell to the neighbor cell; and
connect the electronic device to the relay user equipment via proximity-based service.

10. The electronic device according to claim 3 , further comprising:
a third trigger circuit configured to cause the transceiver to perform a third measurement report to facilitate starting of a de-relay process for causing the electronic device to return to directly communication with the current cell,
wherein the third measurement report is a measurement report for a de-relay event,
wherein the processing circuit is further configured to:
start timing for the third trigger circuit when it is determined that an entering condition for the de-relay event is satisfied;
reset the timing for the third trigger circuit when it is determined that a leaving condition for the de-relay event is satisfied;
cause the transceiver to perform the third measurement report to facilitate starting of the de-relay process when a result of the timing of the third trigger circuit reaches a third trigger time;

configure the entering condition for the de-relay event to be the same as the relay leaving condition;
configure the leaving condition for the de-relay event is to be the same as the relay entering condition; and

configure the third trigger time to be equal to the second trigger time.

11. An electronic device in a wireless communication system, wherein the wireless communication system comprises a plurality of cells comprising a current cell in which the electronic device is located and at least one neighbor cell, and the electronic equipment comprises:
one or more processing circuits configured to:
acquire a first measurement report from a user equipment of the current cell;
start a relay process for causing the user equipment to communicate with the current cell via a relay user equipment in response to the first measurement report;
acquire, after the first measurement report is acquired, a second measurement report from the user equipment; and
start a handover process for causing the user equipment to hand over from the current cell to the neighbor cell in response to the second measurement report,
wherein the relay process is started prior to the handover process, and
wherein the first and second measurement reports include a measurement by the user equipment of the current cell and a measurement by the user equipment of the neighbor cell.

12. The electronic device according to claim 11 , wherein the processing circu

Assignees

• Sony Corp

Inventors

• Xu Xiaodong
• Zhang Yi
• Xiao Yunqiu
• Wang Ce
• Ke Xi
• Hu Bingshan

Classifications

• H04W36/302 Primary

  due to low signal strength · CPC title

• H04W36/00

  Hand-off or reselection arrangements · CPC title

• Y02D30/70

  in wireless communication networks · CPC title

• H04W88/04

  adapted for relaying to or from another terminal or user · CPC title

• H04W24/08

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