Non-contention random access method, node, system, and computer storage medium

• US 10,271,355 B2
• Filed: 08/06/2014
• Issued: 04/23/2019
• Est. Priority Date: 01/09/2014
• Status: Active Grant

• Current Assignee: ZTE Corporation
• Original Assignee: ZTE Corporation
• Inventors: Liu, Kun, Dai, Bo, Lu, Zhaohua, Xia, Shuqiang, Fang, Huiying, Shi, Jing, Li, Xincai
• Primary Examiner(s): Butt, Walli Z
• Application Number:
  US15/110,255
• Publication Number:
  US 20160330766A1
• Time in Patent Office: 1,721 Days
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

Methods, nodes, a system, and computer storage mediums for non-contention random access are provided. The method for non-contention random access includes that: a first node sends configuration information of non-contention random access to a second node through a downlink channel; and the second node obtains the configuration information of the non-contention random access, and sends a random access message on a Physical Random Access Channel (PRACH) according to the configuration information.

Claims

1. A method for non-contention random access, comprising:

sending, by a first node, configuration information of non-contention random access to a second node through a downlink channel; and

receiving, by the first node, a random access message sent by the second node on a Physical Random Access Channel (PRACH) according to the configuration information of the non-contention random access;

wherein the random access message is sent by the second node on the PRACH according to the configuration information of the non-contention random access, wherein the random access message is sent by the second node by;

continuously sending, by the second node, the random access message by taking P times as a unit until a first termination condition is met, wherein P is a natural number;

or

sending, by the second node, the random access message for P times first, and continuing sending the random access message until the first termination condition is met; and

wherein the first termination condition comprises at least one of;

the random access message is sent by taking P times as a unit, and is sent continuously for C times of the unit, wherein the C is system-configured, and C is a natural number;

the random access message is sent continuously for D times, wherein the D is system-configured and a natural number;

or

the second node successfully detects a random access response (RAR) sent by the first node, and the RAR comprises a PRACH preamble index sent by the second node;

or further comprising;

sending, by the first node, the RAR after receiving the random access message from the second node;

wherein a repetition level of the RAR is determined to be;

a repetition level of the random access message from the second node;

or a repetition level of reception of the RAR, wherein the repetition level of reception is configured by the second node currently;

or a repetition level of the RAR, configured in the configuration information of the non-contention random access;

or a maximum repetition level among repetition levels of reception of the RAR, wherein the repetition levels of reception are capable of being configured by the second node;

or a minimum repetition level among repetition levels of reception of the RAR, wherein the repetition levels of reception are capable of being configured by the second node.

2. The method according to claim 1, wherein the configuration information of the non-contention random access comprises at least one first level allocated for a second node, and the at least one first level comprises information, wherein the information is at least one of:

a level of repeated sending of the random access message;

a level of repeated sending of the RAR;

a level of repeated sending of a Msg3 message;

or

a Coverage Improvement Level (CIL) of the second node.

3. The method according to claim 2, wherein the configuration information of the non-contention random access further comprises a PRACH preamble allocated for the second node.

4. The method according to claim 3, wherein the first node instructs initiation of the non-contention random access through signaling instruction information, and the signaling instruction information further comprises the number of times of repeated sending of the random access message, wherein the number of times of repeated sending is configured for the second node and is determined according to a preset rule.

5. The method according to claim 1,

wherein a mapping relation exists between a level of repeated sending of the RAR and the number of times of repeated sending of the RAR;

or,

wherein when the RAR is sent for the n^th time, the n being an integer larger than or equal to 2, a repetition level of the RAR is determined to be;

a repetition level of the RAR sent by the first node for the (n−

1)^th time;

or a repetition level obtained by summating M and a first node-configured repetition level of the RAR sent for the (n−

1)^th time, wherein M is an integer larger than or equal to 1;

or a repetition level corresponding to N-fold the number of times of repeated sending corresponding to a first node-configured repetition level of the RAR sent for the (n−

1)^th time, wherein N is an integer larger than or equal to 1;

or a repetition level of the random access message sent by the second node;

or a repetition level of the random access message sent by the second node last time;

or,

wherein when the RAR is sent for the n1^th time, the n1 being an integer larger than or equal to 2, the number of repetition times of the RAR is determined to be;

the number of times of repeated sending of the RAR, which corresponds to a first node-configured repetition level of the RAR;

or T times of first node-configured number of repeated sending times of the RAR sent for the (n1−

1)^th time, wherein the T is an integer larger than or equal to 1;

or,

wherein an initial resource location and/or a sending time window length which are/is occupied by the RAR and/or a detection time window length are/is at least determined according to a repetition level used by the RAR.

24. A computer storage medium having stored therein computer executable instructions for executing the method for non-contention random access according to claim 1.

6. A method for non-contention random access, comprising:

obtaining, by a second node, configuration information of non-contention random access; and

sending, by the second node, according to the configuration information of the non-contention random access, a random access message on a Physical Random Access Channel (PRACH);

wherein sending the random access message on the PRACH according to the configuration information of the non-contention random access comprises;

continuously sending, by the second node, the random access message by taking P times as a unit and terminating sending of the random access message when a first termination condition is met, wherein P is a natural number;

or

sending, by the second node, the random access message for P times first, and continuing sending the random access message until the first termination condition is met;

wherein the first termination condition comprises at least one of;

the random access message is sent by taking P times as a unit, and is sent continuously for C times of the unit, wherein the C is system-configured, and C is a natural number;

the random access message is sent continuously for D times, wherein the D is system-configured and a natural number;

or

the second node successfully detects a random access response (RAR) sent by the first node, and the RAR comprises a PRACH preamble index sent by the second node;

or further comprising;

receiving, by the second node, the RAR sent by the first node;

wherein a repetition level of the RAR is determined to be;

a repetition level of the random access message from the second node;

or a repetition level of reception of the RAR, wherein the repetition level of reception is configured by the second node currently;

or a repetition level of the RAR, configured in the configuration information of the non-contention random access;

or a maximum repetition level among repetition levels of reception of the RAR, wherein the repetition levels of reception are capable of being configured by the second node;

or a minimum repetition level among repetition levels of reception of the RAR, wherein the repetition levels of reception are capable of being configured by the second node.

7. The method according to claim 6, wherein the configuration information of the non-contention random access comprises at least one first level allocated for the second node, and the at least one first level comprises information, wherein the information is at least one of:

a level of repeated sending of the random access message;

a level of repeated sending of the RAR;

a level of repeated sending of a Msg3 message;

or

a Coverage Improvement Level (CIL) of the second node.

8. The method according to claim 6, wherein the configuration information of the non-contention random access further comprises a PRACH preamble allocated for the second node, wherein the random access message is generated by the PRACH preamble according to a preset rule.

9. The method according to claim 7, wherein the CIL of the second node is in a mapping relation with the level of repeated sending of the random access message, and/or the level of repeated sending of the RAR, and/or the level of repeated sending of the Msg3 message.

10. The method according to claim 6, wherein the number of times of repeated sending of the random access message on the PRACH is determined according to a preset rule.

11. The method according to claim 10, wherein a mapping relation exists between the number of times of repeated sending of the random access message and a level of repeated sending of the random access message,

wherein the number of times of repeated sending of the random access message on the PRACH is determined according to the preset rule, comprises one of:

configuring the number of times of repeated sending of the random access message on the PRACH as the number of times of repeated sending of the random access message, wherein the number of times of repeated sending is configured by the second node currently;

determining the number of times of repeated sending of the random access message according to the level of repeated sending of the random access message, wherein the level of repeated sending is configured by the second node currently;

determining the level of repeated sending of the random access message according to a first level currently configured by the second node, and determining the number of times of repeated sending of the random access message according to the level of repeated sending of the random access message;

determining the level of repeated sending of the random access message according to a first level indicated in the configuration information of the non-contention random access allocated for the second node, and determining the number of times of repeated sending of the random access message according to the level of repeated sending of the random access message;

determining the level of repeated sending of the random access message according to any first level indicated in the configuration information of the non-contention random access allocated for the second node, and determining the number of times of repeated sending of the random access message according to the level of repeated sending of the random access message;

determining the level of repeated sending of the random access message according to a maximum first level indicated in the configuration information of the non-contention random access allocated for the second node, and determining the number of times of repeated sending of the random access message according to the level of repeated sending of the random access message;

or

determining the level of repeated sending of the random access message according to a minimum first level indicated in the configuration information of the non-contention random access allocated for the second node, and determining the number of times of repeated sending of the random access message according to the level of repeated sending of the random access message.

12. The method according to claim 6, further comprising:

when the second node fails to successfully receive the RAR sent for the n2^th time by the first node, the n2 being an integer larger than or equal to 2,

resending, by the second node, the random access message according to the number of times of repeated sending of the random access message randomly accessed for the (n2−

1)^th time;

or resending, by the second node, the random access message according to the number of times of repeated sending obtained by summating M1 and the number of times of repeated sending of the random access message randomly accessed for the (n2−

1)^th time, wherein the M1 is an integer larger than or equal to 1;

or resending, by the second node, the random access message according to N1-fold the number of times of repeated sending of the random access message randomly accessed for the (n2−

1)^th time, wherein the N1 is an integer larger than or equal to 1;

or,

the method further comprising;

when the second node fails to successfully receive the RAR sent for the n3^th time by the first node, the n3 being an integer larger than or equal to 2, regenerating, by the second node, a random access message which is generated by a PRACH preambles according to a preset rule, wherein the PRACH preamble is;

a PRACH preamble used when the second node sends the random access message for the (n3−

1)^th time;

or the PRACH preamble in the configuration information;

or a PRACH preamble at least determined by a PRACH preamble used when the second node sends the random access message for the (n3−

1)^th time.

25. A computer storage medium having stored therein computer executable instructions for executing the method for non-contention random access according to claim 6.

13. An apparatus, comprising:

a processor and a memory for storing instructions executed by the processor, wherein the processor is configured to;

configure configuration information of non-contention random access;

send, through a downlink channel, the configuration information of the non-contention random access; and

receive a random access message sent on a Physical Random Access Channel (PRACH) according to the configuration information of the non-contention random access;

wherein the random access message is sent on the PRACH according to the configuration information of the non-contention random access, wherein the random access message is sent by;

continuously sending the random access message by taking P times as a unit until a first termination condition is met, wherein P is a natural number;

or

sending the random access message for P times first, and continuing sending the random access message until the first termination condition is met; and

wherein the first termination condition comprises at least one of;

the random access message is sent by taking P times as a unit, and is sent continuously for C times of the unit, wherein the C is system-configured, and C is a natural number;

or

the random access message is sent continuously for D times, wherein the D is system-configured and a natural number;

or the processor is further configured to;

send the RAR after receiving the random access message;

wherein a repetition level of the RAR is determined to be;

a repetition level of the random access message;

or a repetition level of reception of the RAR currently configured;

or a repetition level of the RAR, configured in the configuration information of the non-contention random access;

or a maximum repetition level among repetition levels of reception of the RAR, wherein the repetition levels of reception are capable of being configured;

or a minimum repetition level among repetition levels of reception of the RAR, wherein the repetition levels of reception are capable of being configured.

14. The apparatus according to claim 13, wherein the configuration information of the non-contention random access comprises at least one first level allocated for another apparatus, and the at least one first level comprises information, wherein the information is at least one of:

a level of repeated sending of the random access message;

a level of repeated sending of the RAR;

a level of repeated sending of a Msg3 message;

or

a Coverage Improvement Level (CIL) of the another apparatus.

15. The apparatus according to claim 14, wherein the configuration information of the non-contention random access further comprises a PRACH preamble;

the processor is further configured to execute the stored program instructions to, when a PRACH allocated by the non-contention random access and a PRACH allocated by contention random access occupy a same Physical Resource Block (PRB) resource, configure different PRACH preambles for the non-contention PRACH preamble and a contention PRACH preamble.

16. The apparatus according to claim 13, wherein the processor is configured to execute the stored program instructions to configure the number of times of repeated sending of the random access message on the PRACH according to a preset rule, wherein a mapping relation exists between the number of times of repeated sending of the random access message and a level of repeated sending of the random access message.

17. The apparatus according to claim 13, wherein a mapping relation exists between a level of repeated sending of the RAR and the number of times of repeated sending of the RAR.

18. The apparatus according to claim 17, wherein

when the RAR is sent for the nth time, the n being an integer larger than or equal to 2, determine a repetition level of the RAR to be:

a repetition level of the RAR sent for the (n−

1)^th time;

or

a repetition level obtained by summating M and a first configured repetition level of the RAR sent for the (n−

1)^th time, wherein M is an integer larger than or equal to 1;

or

a repetition level corresponding to N-fold the number of times of repeated sending corresponding to a configured repetition level of the RAR sent for the (n−

1)^thtime, wherein N is an integer larger than or equal to 1;

or

a repetition level of the random access message;

or

a repetition level of the random access message sent for the (n−

1)^th time;

or,

the processor is further configured to execute the stored program instructions to, when the RAR is sent for the n1^th time, the n1 being an integer larger than or equal to 2, determine the number of repetition times of the RAR to be;

the number of times of repeated sending of the RAR, which corresponds to a configured repetition level of the RAR;

or

T times of configured number of repeated sending times of the RAR sent for the (n1−

1)^th time, wherein the T is an integer larger than or equal to 1;

or,

the processor is further configured to execute the stored program instructions to determine an initial resource location and/or a sending time window length which are/is occupied by the RAR and/or a detection time window length at least according to a repetition level used by the RAR.

19. An apparatus, comprising:

a processor and a memory for storing instructions executed by the processor, wherein the processor is configured to;

obtain configuration information of non-contention random access; and

send a random access message on a Physical Random Access Channel (PRACH) according to the configuration information of the non-contention random access;

wherein sending the random access message on the PRACH according to the configuration information of the non-contention random access comprises;

continuously sending the random access message by taking P times as a unit and terminating sending of the random access message when a first termination condition is met, wherein P is a natural number;

or

sending the random access message for P times first, and continuing sending the random access message until the first termination condition is met;

wherein the first termination condition comprises at least one of;

the random access message is sent by taking P times as a unit, and is sent continuously for C times of the unit, wherein the C is system-configured, and C is a natural number;

the random access message is sent continuously for D times, wherein the D is system-configured and a natural number;

or

the apparatus successfully detects a random access response (RAR), and the RAR comprises a PRACH preamble index;

or the processor is further configured to;

receive the RAR;

wherein a repetition level of the RAR is determined to be;

a repetition level of the random access message;

or a repetition level of reception of the RAR, wherein the repetition level of reception is configured currently;

or a repetition level of the RAR, configured in the configuration information of the non-contention random access;

or a maximum repetition level among repetition levels of reception of the RAR, wherein the repetition levels of reception are capable of being configured;

or a minimum repetition level among repetition levels of reception of the RAR, wherein the repetition levels of reception are capable of being configured.

20. The apparatus according to claim 19, wherein the configuration information of the non-contention random access comprises at least one first level allocated for the apparatus, and the at least one first level comprises information, wherein the information is at least one of:

a level of repeated sending of the random access message;

a level of repeated sending of the RAR;

a level of repeated sending of a Msg3 message;

or

a Coverage Improvement Level (CIL).

21. The apparatus according to claim 20, wherein the configuration information of the non-contention random access further comprises a PRACH preamble;

and

the processor is further configured to execute the stored program instructions to generate the random access message according to the PRACH preamble based on a preset rule, and when failing to successfully receive the RAR sent for the n3th time by the apparatus, wherein the n3^th is an integer larger than or equal to 2, regenerate a random access message which is generated by a PRACH preamble according to the preset rule, wherein the PRACH preamble is;

a PRACH preamble used when the random access message is sent for the (n3−

1)^th time;

or the PRACH preamble in the configuration information;

or a PRACH preamble at least determined by a PRACH preamble used when the random access message is sent for the (n3−

1)^th time.

22. The apparatus according to claim 20, the processor is further configured to execute the stored program instructions to:

create and store a mapping relation between the CIL and the level of repeated sending of the random access message, and/or the level of repeated sending of the RAR, and/or the level of repeated sending of the Msg3 message, and create and store a mapping relation between the number of times of repeated sending of the random access message and the level of repeated sending of the random access message; and

determine the number of times of repeated sending of the random access message on the PRACH according to a preset rule, wherein the processor is further configured to execute the stored program instructions to determine the number of sending times of the random access message by one of;

configuring the number of times of repeated sending of the random access message on the PRACH as the number of times of repeated sending of the random access message, wherein the number of times of repeated sending is configured currently;

determining the number of times of repeated sending of the random access message according to the level of repeated sending of the random access message, wherein the level of repeated sending is configured currently;

determining the level of repeated sending of the random access message according to a first level currently configured, and determining the number of times of repeated sending of the random access message according to the level of repeated sending of the random access message;

determining the level of repeated sending of the random access message according to a first level indicated in the configuration information of the non-contention random access, and determining the number of times of repeated sending of the random access message according to the level of repeated sending of the random access message;

determining the level of repeated sending of the random access message according to any first level indicated in the configuration information of the non-contention random access, and determining the number of times of repeated sending of the random access message according to the level of repeated sending of the random access message;

determining the level of repeated sending of the random access message according to a maximum first level indicated in the configuration information of the non-contention random access, and determining the number of times of repeated sending of the random access message according to the level of repeated sending of the random access message;

or determining the level of repeated sending of the random access message according to a minimum first level indicated in the configuration information of the non-contention random access, and determining the number of times of repeated sending of the random access message according to the level of repeated sending of the random access message.

23. The apparatus according to claim 19, wherein

the processor is further configured to execute the stored program instructions to, when failing to successfully receive the RAR sent for the n2^th time by the apparatus, wherein the n2 is an integer larger than or equal to 2,

resend the random access message according to the number of times of repeated sending of the random access message randomly accessed for the (n2−

1)^th time;

or

resend the random access message according to the number of times of repeated sending obtained by summating M1 and the number of times of repeated sending of the random access message randomly accessed for the (n2−

1)^th time, wherein the M1 is an integer larger than or equal to 1;

or

resend the random access message according to N1-fold the number of times of repeated sending of the random access message randomly accessed for the (n2−

1)^th time, wherein the N1 is an integer larger than or equal to 1.