Title:
UE, ENODEB AND METHODS FOR THEM
Document Type and Number:
Japanese Patent JP2019146276
Kind Code:
A
Abstract:
To provide an improvement to enable a terminal to determine the necessity for a coverage improvement process.SOLUTION: UE receives a system information block message that includes coverage improvement setting information to transmit a PRACH random access preamble and a criterion for indicating an RSRP threshold, and determines an operation level in a coverage improvement process on the basis of comparison between the RSRP threshold and RSRP value measured by the UE. Furthermore, the UE repeatedly transmits a random access preamble by using PRACH resource corresponding to the determined operation level.SELECTED DRAWING: Figure 2
Inventors:
FUTAKI TAKASHI
Application Number:
JP2019106829A
Publication Date:
August 29, 2019
Filing Date:
June 07, 2019
Export Citation:
Assignee:
NEC CORP
International Classes:
H04W74/08; H04W4/70; H04W48/10; H04W48/16
Foreign References:
| US20130208673A1 | 2013-08-15 | |||
| WO2013149666A1 | 2013-10-10 | |||
| WO2018024947A1 | 2018-02-08 | |||
| WO2015005701A1 | 2015-01-15 |
Other References:
ALCATEL-LUCENT, ALCATEL-LUCENT SHANGHAI BELL: "PRACH Coverage Enhancement for MTC UE[online]", 3GPP TSG-RAN WG1#75 R1-135155, JPN6020004077, 15 November 2013 (2013-11-15), pages 1 - 8, ISSN: 0004295823
NSN, NOKIA: "PRACH Enhancement and Mechanism for Identifying Coverage Shortfall[online]", 3GPP TSG-RAN WG1#74B R1-134517, JPN6020004078, 11 October 2013 (2013-10-11), pages 1 - 4, ISSN: 0004295824
NTT DOCOMO: "Discussion on Multi-level PRACH Coverage Enhancement[online]", 3GPP TSG-RAN WG1#75 R1-135509, JPN6020004079, 15 November 2013 (2013-11-15), pages 1 - 7, ISSN: 0004207986
NTT DOCOMO: "Discussion on Multi-level PRACH Coverage Enhancement[online]", 3GPP TSG-RAN WG1#74B R1-134493, JPN6020004080, 11 October 2013 (2013-10-11), pages 1 - 5, ISSN: 0004207987
HUAWEI, HISILICON: "Discussion on PRACH coverage improvement and mechanism for determining the amount of needed coverage", 3GPP TSG-RAN WG1#74B R1-134054, JPN6020004082, 11 October 2013 (2013-10-11), pages 1 - 6, ISSN: 0004207988
ERICSSON: "Control of amount of coverage enhancement for MTC UE[online]", 3GPP TSG-RAN WG1#74B R1-134648, JPN6020004083, 11 October 2013 (2013-10-11), pages 1 - 4, ISSN: 0004207989
NSN, NOKIA: "PRACH Enhancement and Mechanism for Identifying Coverage Shortfall[online]", 3GPP TSG-RAN WG1#74B R1-134517, JPN6020004078, 11 October 2013 (2013-10-11), pages 1 - 4, ISSN: 0004295824
NTT DOCOMO: "Discussion on Multi-level PRACH Coverage Enhancement[online]", 3GPP TSG-RAN WG1#75 R1-135509, JPN6020004079, 15 November 2013 (2013-11-15), pages 1 - 7, ISSN: 0004207986
NTT DOCOMO: "Discussion on Multi-level PRACH Coverage Enhancement[online]", 3GPP TSG-RAN WG1#74B R1-134493, JPN6020004080, 11 October 2013 (2013-10-11), pages 1 - 5, ISSN: 0004207987
HUAWEI, HISILICON: "Discussion on PRACH coverage improvement and mechanism for determining the amount of needed coverage", 3GPP TSG-RAN WG1#74B R1-134054, JPN6020004082, 11 October 2013 (2013-10-11), pages 1 - 6, ISSN: 0004207988
ERICSSON: "Control of amount of coverage enhancement for MTC UE[online]", 3GPP TSG-RAN WG1#74B R1-134648, JPN6020004083, 11 October 2013 (2013-10-11), pages 1 - 4, ISSN: 0004207989
Attorney, Agent or Firm:
Ken Ieiri