Method, device, apparatus for selecting a random access resource, and storage medium

Patent metadata

Field	Value
Publication number	US-11596002-B2
Application number	US-201917054481-A
Country	US
Kind code	B2
Filing date	May 10, 2019
Priority date	May 11, 2018
Publication date	Feb 28, 2023
Grant date	Feb 28, 2023

Abstract

A method, device, apparatus for selecting a random access resource, and storage medium. The method includes: measuring an RSRP value, an RSRQ value and a PL value of a downlink channel; calculating a fluctuation value of RSRP, RSRQ and PL, according to the measured RSRP value, the RSRQ value, the PL value and an RSRP value, an RSRQ value, a PL value in a first configuration table; comparing each of the fluctuation value of RSRP, RSRQ and PL with a respective corresponding preset threshold; and in response to each of the fluctuation value not exceeding the respective corresponding preset threshold, selecting a first CEL in a second configuration table according to the RSRP value, the RSRQ value and the PL value in the first configuration table, and determining a first random access resource according to the selected first CEL.

First claim

The invention claimed is:

1. A method for selecting a random access resource, comprising:
measuring a reference signal receiving power (RSRP) value, a reference signal receiving quality (RSRQ) value and a path loss (PL) value of a downlink channel;
calculating a fluctuation value of RSRP, a fluctuation value of RSRQ and a fluctuation value of PL, according to the measured RSRP value, the measured RSRQ value, the measured PL value and an RSRP value, an RSRQ value, a PL value in a first configuration table;
comparing each of the fluctuation value of RSRP, the fluctuation value of RSRQ and the fluctuation value of PL with a respective corresponding preset threshold; and
selecting a first coverage enhancement level (CEL) in a second configuration table according to the RSRP value, the RSRQ value and the PL value in the first configuration table, and determining a first random access resource according to the selected first CEL, in response to each of the fluctuation value of RSRP, the fluctuation value of RSRQ and the fluctuation value of PL not exceeding the respective corresponding preset threshold.

2. The method of claim 1 , wherein before the step of calculating the fluctuation value of RSRP, the fluctuation value of RSRQ and the fluctuation value of PL, according to the measured RSRP value, the measured RSRQ value, the measured PL value and the RSRP value, the RSRQ value, the PL value in the first configuration table, the method further comprises:
judging whether the first configuration table is valid;
calculating the fluctuation value of RSRP, the fluctuation value of RSRQ and the fluctuation value of PL, in response to the first configuration table being valid; and
deleting data in the first configuration table, and performing a random access assessment, in response to the first configuration table being invalid.

3. The method of claim 1 , wherein after calculating the fluctuation value of RSRP, the fluctuation value of RSRQ and the fluctuation value of PL, the method further comprises:
deleting data in the first configuration table, and performing a random access assessment, in response to at least one of the fluctuation value of RSRP, the fluctuation value of RSRQ and the fluctuation value of PL exceeding the respective corresponding preset threshold.

4. The method of claim 1 , further comprising:
initiating a random access according to the determined first random access resource;
updating the RSRP value, the RSRQ value and the PL value in the first configuration table according to the measured RSRP value, the measured RSRQ value and the measured PL value, and setting an effective time of the first configuration table, in response to a success of the random access; and
selecting a next first CEL, and determining a next first random access resource according to the selected next first CEL, in response to a failure of the random access, so as to continue to initiate a next random access until the next random access is successful.

5. The method of claim 2 , wherein the step of performing the random access assessment comprises:
selecting a second CEL in the second configuration table according to the measured RSRP value, the measured RSRQ value and the measured PL value, and determining a second random access resource according to the selected second CEL;
initiating a random access according to the determined second random access resource;
updating the RSRP value, the RSRQ value and the PL value in the first configuration table according to the measured RSRP value, the measured RSRQ value and the measured PL value, and setting an effective time of the first configuration table, in response to a success of the random access; and
selecting a next second CEL, and determining a next second random access resource according to the selected next second CEL, in response to a failure of the random access, so as to continue to initiate a next random access until the next random access is successful.

6. The method of claim 3 , wherein the step of performing the random access assessment comprises:
selecting a second CEL in the second configuration table according to the measured RSRP value, the measured RSRQ value and the measured PL value, and determining a second random access resource according to the selected second CEL;
initiating a random access according to the determined second random access resource;
updating the RSRP value, the RSRQ value and the PL value in the first configuration table according to the measured RSRP value, the measured RSRQ value and the measured PL value, and setting an effective time of the first configuration table, in response to a success of the random access; and
selecting a next second CEL, and determining a next second random access resource according to the selected next second CEL, in response to a failure of the random access, so as to continue to initiate a next random access until the next random access is successful.

7. A device for selecting a random access resource, comprising:
a measurement module configured to measure a reference signal receiving power (RSRP) value, a reference signal receiving quality (RSRQ) value and a path loss (PL) value of a downlink channel;
a calculation module configured to calculate a fluctuation value of RSRP, a fluctuation value of RSRQ and a fluctuation value of PL, according to the measured RSRP value, the measured RSRQ value, the measured PL value and an RSRP value, an RSRQ value, a PL value in a first configuration table;
a comparison module configured to compare each of the fluctuation value of RSRP, the fluctuation value of RSRQ and the fluctuation value of PL with a respective corresponding preset threshold; and
a selection module configured to select a first coverage enhancement level (CEL) in a second configuration table according to the RSRP value, the RSRQ value and the PL value in the first configuration table, and determine a first random access resource according to the selected first CEL, in response to each of the fluctuation value of RSRP, the fluctuation value of RSRQ and the fluctuation value of PL not exceeding the respective corresponding preset threshold.

8. The device of claim 7 , further comprising a judgment module and a processing module, wherein
the judgment module is configured to judge whether the first configuration table is valid;
the calculation module is configured to calculate the fluctuation value of RSRP, the fluctuation value of RSRQ and the fluctuation value of PL, in response to the first configuration table being valid; and
the processing module is configured to delete data in the first configuration table, and perform a random access assessment, in response to the first configuration table being invalid.

9. The device of claim 8 , wherein,
the processing module is configured to delete the data in the first configuration table, and perform a random access assessment, in response to at least one of the fluctuation value of RSRP, the fluctuation value of RSRQ and the fluctuation value of PL exceeding the respective corresponding preset threshold.

10. The device of claim 8 , further comprising an access module and an update module, wherein,
the access module is configured to initiate a random access according to the determined first random access resource;
the update module is configured to update the RSRP value, the RSRQ value and the PL value in the first configuration table according to the measured RSRP value, the measured RSRQ value and the measured PL value, and set an effective time of the first configuration table, in response to a success of the random access; and
the selection module is configured to select a next first CEL, and determine a next first random access resource

Assignees

• Zte Corp

Inventors

• Gao Minggang
• Ni Qingyu
• Wang Yajing
• Ding Xuemei

Classifications

• H04B17/336 Primary

  Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] · CPC title

• H04B17/328

  Reference signal received power [RSRP]; Reference signal received quality [RSRQ] · CPC title

• H04W74/0833 Primary

  Random access procedures, e.g. with 4-step access · CPC title

• H04B17/327 Primary

  Received signal code power [RSCP] · CPC title

• H04W52/242

  taking into account path loss · CPC title