METHOD FOR RANDOM ACCESS IN IDLE STATE AND DEVICE

• US 20160150564A1
• Filed: 02/01/2016
• Published: 05/26/2016
• Est. Priority Date: 08/02/2013
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Quan, Wei, Hu, Zhenxing, Zhang, Jian
• Granted Patent: US 10,772,122 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 2101/654 International mobile subscriber identity [IMSI] numbers
• CPC Class Codes: H04L 61/103 across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
• CPC Class Codes: H04W 28/0278 using buffer status reports dynamic wireless traffic scheduling definition H04W72/12
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 72/569 of the traffic information
• CPC Class Codes: H04W 74/004 in the uplink, i.e. towards network
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

Embodiments of the present invention provide a method for random access in an idle state and a device. The method includes: sending, by user equipment (UE), a random access preamble to a evolved NodeB (eNB), and receiving a random access response message that is sent by the eNB according to the random access preamble; sending, by the UE, a first message to the eNB according to first uplink grant information; and receiving, by the UE, second uplink grant information sent by the eNB, and sending to-be-sent data to the eNB according to the second uplink grant information. According to the method for random access in an idle state and the device provided in the embodiments of the present invention, accuracy of uplink resource allocation is improved during random access of UE in an idle state.

Claims

1. A method for random access in an idle state, the method comprising:

sending, by user equipment (UE), a random access preamble to an evolved NodeB (eNB), and receiving a random access response message that is sent by the eNB according to the random access preamble, wherein the random access response message carries first uplink grant information;

sending, by the UE, a first message to the eNB according to the first uplink grant information, wherein the first message carries a buffer status report (BSR), and the BSR is used to indicate a volume of to-be-sent data of the UE, so that the eNB allocates an uplink resource to the UE according to the BSR; and

receiving, by the UE, second uplink grant information sent by the eNB, and sending the to-be-sent data to the eNB according to the second uplink grant information, wherein the second uplink grant information is used to indicate the uplink resource allocated to the UE by the eNB.

2. The method for random access in an idle state according to claim 1, wherein the first message further carries data priority information used to indicate a priority of the to-be-sent data or equipment priority information used to indicate a priority of the UE.

3. The method for random access in an idle state according to claim 1, wherein sending, by the UE, a first message to the eNB according to the first uplink grant information comprises:

if the UE determines that an uplink resource indicated by the first uplink grant information cannot bear the to-be-sent data, sending, by the UE, the first message to the eNB.

4. The method for random access in an idle state according to claim 3, further comprising:

if the UE determines that the uplink resource indicated by the first uplink grant information can bear the to-be-sent data, sending, by the UE, a second message to the eNB, wherein the second message carries the to-be-sent data.

5. The method for random access in an idle state according to claim 1, wherein the first message further comprises:

a message identifier used to indicate that the first message carries the BSR, and a UE identity, wherein the message identifier of the BSR comprises a logical channel number, and the UE identity comprises a temporary mobile subscriber identity, an international mobile subscriber identity, or an international mobile equipment identity of the UE.

6. The method for random access in an idle state according to claim 1, wherein before sending, by the UE, a first message to the eNB according to the first uplink grant information, the method further comprises:

receiving, by the UE, a BSR configuration parameter delivered by a network side device, and generating the BSR according to the BSR configuration parameter.

7. A method for random access in an idle state, the method comprising:

receiving, by an evolved NodeB (eNB), a random access preamble sent by user equipment (UE), and sending a random access response message to the UE according to the random access preamble, wherein the random access response message carries first uplink grant information;

receiving, by the eNB, a first message that is sent by the UE according to the first uplink grant information, wherein the first message carries a buffer status report (BSR), and the BSR is used to indicate a volume of to-be-sent data of the UE; and

scheduling, by the eNB, the UE, allocating an uplink resource to the UE according to the BSR, and sending second uplink grant information to the UE, wherein the second uplink grant information is used to indicate the uplink resource allocated to the UE by the eNB.

8. The method for random access in an idle state according to claim 7, wherein after receiving, by the eNB, a first message that is sent by the UE according to the first uplink grant information, and before the allocating, by the eNB, an uplink resource to the UE according to the BSR, the method further comprises:

sending, by the eNB, a contention resolution message, wherein the contention resolution message carries information that is sent by the UE to the eNB by using the first message.

9. The method for random access in an idle state according to claim 7, wherein:

the first message further carries data priority information used to indicate a priority of the to-be-sent data or equipment priority information used to indicate a priority of the UE; and

scheduling, by the eNB, the UE comprises;

scheduling, by the eNB, the UE according to the data priority information or the equipment priority information.

10. The method for random access in an idle state according to claim 7, wherein:

the random access response message further carries a temporary cell radio network temporary identifier (C-RNTI) that is allocated to the UE by the eNB, and the first message further carries a user equipment identity; and

the method further comprises;

establishing, by the eNB, a mapping relationship between the temporary C-RNTI and the user equipment identity, and

when downlink data of the UE arrives, determining, by the eNB, the temporary C-RNTI according to the user equipment identity in the downlink data, and scheduling the UE according to the temporary C-RNTI, or determining, by the eNB, the temporary C-RNTI according to the user equipment identity in a paging message that is received from a core network, and paging the UE according to the temporary C-RNTI.

11. The method for random access in an idle state according to claim 7, wherein the first message further comprises:

a message identifier used to indicate that the first message carries the BSR, and a UE identity, wherein the message identifier of the BSR comprises a logical channel number, and the UE identity comprises a temporary mobile subscriber identity, an international mobile subscriber identity, or an international mobile equipment identity of the UE.

12. User equipment (UE), comprising:

a sender, configured to send a random access preamble to an evolved NodeB (eNB);

a receiver, configured to receive a random access response message that is sent by the eNB according to the random access preamble, wherein the random access response message carries first uplink grant information;

a processor, configured to send a first message to the eNB according to the first uplink grant information by using the sender, wherein the first message carries a buffer status report BSR, and the BSR is used to indicate a volume of to-be-sent data of the UE, so that the eNB allocates an uplink resource to the UE according to the BSR;

wherein the receiver is further configured to receive second uplink grant information sent by the eNB, wherein the second uplink grant information is used to indicate the uplink resource allocated to the user equipment UE by the eNB; and

wherein the processor is further configured to send the to-be-sent data to the eNB according to the second uplink grant information by using the sender.

13. The user equipment according to claim 12, wherein the first message further carries data priority information used to indicate a priority of the to-be-sent data or equipment priority information used to indicate a priority of the UE.

14. The user equipment according to claim 12, wherein the processor is further configured to:

if determining that an uplink resource indicated by the first uplink grant information cannot bear the to-be-sent data, send the first message to the eNB by using the sender.

15. The user equipment according to claim 14, wherein the processor is further configured to:

if determining that the uplink resource indicated by the first uplink grant information can bear the to-be-sent data, send a second message to the eNB by using the sender, wherein the second message carries the to-be-sent data.

16. The user equipment according to claim 12, wherein the first message further comprises:

a message identifier used to indicate that the first message carries the BSR, and a UE identity, wherein the message identifier of the BSR comprises a logical channel number, and the UE identity comprises a temporary mobile subscriber identity, an international mobile subscriber identity, or an international mobile equipment identity of the UE.

17. The user equipment according to claim 12, wherein the receiver is further configured to receive a BSR configuration parameter delivered by a network side device, and generate the BSR according to the BSR configuration parameter.

18. A base station, comprising:

a receiver, configured to receive a random access preamble sent by user equipment (UE);

a sender, configured to send a random access response message to the UE according to the random access preamble, wherein the random access response message carries first uplink grant information;

wherein the receiver is further configured to receive a first message that is sent by the UE according to the first uplink grant information, wherein the first message carries a buffer status report (BSR) is used to indicate a volume of to-be-sent data of the UE;

a processor, configured to schedule the UE, and allocate an uplink resource to the UE according to the BSR; and

wherein the sender is further configured to send second uplink grant information to the UE, wherein the second uplink grant information is used to indicate the uplink resource allocated to the UE by the base station.

19. The base station according to claim 18, wherein the sender is further configured to:

send a contention resolution message, wherein the contention resolution message carries information that is sent by the UE to the eNB by using the first message.

20. The base station according to claim 18, wherein:

the first message further carries data priority information used to indicate a priority of the to-be-sent data or equipment priority information used to indicate a priority of the UE; and

the processor is configured to schedule the UE according to the data priority information or the equipment priority information.

21. The base station according to claim 18, wherein:

the random access response message further carries a temporary cell radio network temporary identifier (C-RNTI) that is allocated to the UE by the base station, and the first message further carries a user equipment identity; and

the processor is further configured to establish a mapping relationship between the temporary C-RNTI and the user equipment identity, and when downlink data of the UE arrives, determine the temporary C-RNTI according to the user equipment identity in the downlink data, and schedule the UE according to the temporary C-RNTI, or determine the temporary C-RNTI according to the user equipment identity in a paging message that is received from a core network, and page the UE according to the temporary C-RNTI.

22. The base station according to claim 18, wherein the first message further comprises:

a message identifier used to indicate that the first message carries the BSR, and a UE identity, wherein the message identifier of the BSR comprises a logical channel number, and the UE identity comprises a temporary mobile subscriber identity, an international mobile subscriber identity, or an international mobile equipment identity of the UE.