IP Library Granted Patent US 12,432,013
Granted Patent B2
US 12,432,013 · App. 17/676,909 · Granted Sep 30, 2025

S1AP optimal retransmission

Inventor: Shivani Mehrotra (Nashua, NH)
Assignee: Parallel Wireless, Inc.
H04L1/08H04L1/188H04W36/02H04W76/30
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Quick Facts
Patent No.
US 12,432,013
App. No.
17/676,909
Granted
Sep 30, 2025
Kind
B2
Abstract

Methods, systems and computer readable media are disclosed for operating a wireless network system. In one embodiment a method includes defining a plurality of Information Elements (IEs) relating to a retransmit timer value and a retransmit count; including, by the Mobility Management Entity (MME), the plurality of IEs in a first message sent to an eNodeB with a timer value and a retransmission count for the message; processing, by the eNodeB, the message, buffering the request, and starting a corresponding timer; and sending, by the eNodeB when a response from a User Equipment (UE) is not received before the timer expires, a stop retry message indication to the MME.

Claims (30)

1. A method comprising:

defining a plurality of Information Elements (IEs) relating to a retransmit timer value and a retransmit count;

including, by a Mobility Management Entity (MME), the plurality of IEs in a first network access stratum NAS message sent to an eNodeB with a timer value and a retransmission count for the NAS message;

processing, by the eNodeB, the NAS message, buffering the NAS message, and starting a corresponding timer; and

sending, by the eNodeB when a response from a User Equipment (UE) pertaining to the NAS message is not received before the timer expires, a stop retry message indication to the MME.

2. The method of claim 1 wherein defining a plurality of Information Elements (IEs) relating to a retransmit timer value includes defining a retransmit timer value IE.

3. The method of claim 1 wherein defining a plurality of Information Elements (IEs) relating to a retransmit count includes defining a retransmit count value IE.

4. The method of claim 1 further comprising receiving an indication at the MME that the NAS message has been buffered successfully and that the MME does not need to retransmit the NAS message.

5. The method of claim 1 further comprising receiving an indication at the MME that retry of NAS messages will be taken care of by the eNodeB and that the MME can stop retransmissions.

6. The method of claim 1 further comprising starting a timer having a value of Tx multiplied by a retransmission count.

7. A system providing S1AP optimal retransmission comprising:

a plurality of Information Elements (IEs) relating to a retransmit timer value and a retransmit count;

a Mobility Management Entity (MME) including the plurality of IEs in a first network access stratum NAS message sent to an eNodeB with a timer value and a retransmission count for the NAS message;

wherein the eNodeB processes the NAS message, buffers the NAS message, and starts a corresponding timer; and

wherein the eNodeB sends a stop retry message indication to the MME when a response from a User Equipment (UE) pertaining to the NAS message is not received before the timer expires.

8. The system of claim 7 wherein a plurality of Information Elements (IEs) relating to a retransmit timer value includes a retransmit timer value IE.

9. The system of claim 7 wherein a plurality of Information Elements (IEs) relating to a retransmit count includes a retransmit count value IE.

10. The system of claim 7 further comprising the MME receiving an indication that the NAS message has been buffered successfully and that the MME does not need to retransmit the NAS message.

11. The system of claim 7 further comprising the MME receiving an indication that retry of NAS messages will be taken care of by the eNodeB and that the MME can stop retransmissions.

12. The system of claim 7 further comprising a timer having a value of Tx multiplied by a retransmission count is started.

13. A non-transitory computer-readable medium containing instructions for operating a wireless network system which, when executed, cause the system to perform steps comprising:

defining a plurality of Information Elements (IEs) relating to a retransmit timer value and a retransmit count;

including, by a Mobility Management Entity (MME), the plurality of IEs in a first network access stratum (NAS) message sent to an eNodeB with a timer value and a retransmission count for the NAS message;

processing, by the eNodeB, the NAS message, buffering the NAS message, and starting a corresponding timer; and

sending, by the eNodeB when a response from a User Equipment (UE) pertaining to the NAS message is not received before the timer expires, a stop retry message indication to the MME.

14. The computer-readable medium of claim 13 wherein instructions for defining a plurality of Information Elements (IEs) relating to a retransmit timer value includes instructions for defining a retransmit timer value IE.

15. The computer-readable medium of claim 13 wherein instructions for defining a plurality of Information Elements (IEs) relating to a retransmit count includes instructions for defining a retransmit count value IE.

16. The computer-readable medium of claim 13 further comprising instructions for receiving an indication at the MME that the NAS message has been buffered successfully and that the MME does not need to retransmit the NAS message.

17. The computer-readable medium of claim 13 further comprising instructions for receiving an indication at the MME that retry of NAS messages will be taken care of by the eNodeB and that the MME can stop retransmissions.

18. The computer-readable medium of claim 13 further comprising instructions for starting a timer having a value of Tx multiplied by a retransmission count.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 26, 2025
From: MEHROTRA, SHIVANI
To: PARALLEL WIRELESS, INC.
Reel/Frame 072562/0223 →
Continuity (2)
Provisional Application 63151435 · Feb 19, 2021
Related Publication 20220272600A1 · Aug 25, 2022
References Cited (4)
US 20190357295A1 · Kim · 2019 [cited by examiner]
LTE; General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access (3GPP TS 23.401 version 12.6.0 Release 12), Sep. 2014. [cited by applicant]
Universal Mobile Telecommunications System (UMTS); LTE; 5G; Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS); Stage 3 (3GPP TS 24.301 version 15.4.0 Release 15), Oct. 2018. [cited by applicant]
LTE; Evolved Universal Terrestrial Radio Access Network (E-UTRAN); S1 Application Protocol (S1AP) (3GPP TS 36.413 version 15.3.0 Release 15), Sep. 2018. [cited by applicant]