Methods for reducing set-up signaling in a long term evolution system

• US 8,787,212 B2
• Filed: 12/28/2010
• Issued: 07/22/2014
• Est. Priority Date: 12/28/2010
• Status: Active Grant

• Current Assignee: Motorola Solutions, Inc.
• Original Assignee: Motorola Solutions, Inc.
• Inventors: Oprescu-Surcobe, Valentin, Korus, Michael F., Newberg, Donald G., Pandey, Aparna
• Primary Examiner(s): Moore, Ian N
• Assistant Examiner(s): Huynh, Dung B
• Application Number:
  US12/980,222
• Publication Number:
  US 20120163204A1
• Time in Patent Office: 1,302 Days
• Field of Search: None
• US Class Current: 370/261
• CPC Class Codes: H04L 65/4061 Push-to services, e.g. push-to-talk or push-to-video
• CPC Class Codes: H04W 4/10 Push-to-Talk [PTT] or Push-On-Call services
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/11 Allocation or use of connection identifiers
• CPC Class Codes: H04W 76/45 for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services

Abstract

A method for reducing set-up signaling in a Long Term Evolution (LTE) communication system is performed by an LTE subsystem. The method includes the LTE subsystem: receiving from a first user equipment (UE) a first message as part of a connection procedure to connect the first UE to the LTE system, the first message having contents that include an identifier for identifying a virtual channel on which the first UE intends to transmit media; determining a status of the virtual channel; and based on the status of the virtual channel, determining whether to send to the first UE a response to the first message that allows the connection procedure to proceed or to send to the first UE a response that terminates the connection procedure.

Claims

1. A method for reducing set-up signaling in a Long Term Evolution (LTE) system, the method comprising:

at an LTE subsystem performing;

receiving, from each of one or more user equipment (UE), a first message comprising a virtual channel identifier for a virtual channel on which the UE intends to transmit media, wherein the virtual channel is an information flow between a media source and a set of target UE and is associated with a downlink bearer;

determining whether the virtual channel is available for a transmission;

comparing a number of first messages received to a threshold;

when the number of first messages received is less than the threshold and when the virtual channel is available, sending to each of the one or more UE a response to the first message that allows the connection procedure to proceed; and

when the number of first messages received is greater than the threshold and when the virtual channel is available, sending, to a number of the one or more UE less than the threshold, a response that allows the connection procedure to proceed and sending, to all the other UE that sent the first message, a response that terminates the connection procedure.

2. The method of claim 1, wherein determining whether the virtual channel is available and sending to the first UE the response that allows the connection procedure to proceed or the response that terminates the connection procedure is performed by a Mobility Management Entity.

3. The method of claim 1, wherein determining whether the virtual channel is available and sending to the first UE the response that allows the connection procedure to proceed or the response that terminates the connection procedure is performed by a serving cell.

4. The method of claim 3 further comprising the serving cell removing the identifier that identifies the virtual channel before sending at least a portion of the contents of the first message to a Mobility Management Entity.

5. The method of claim 1, wherein the first message further includes an indication of at least one of priority, pre-emption, or queuing for the intended media transmission by the first UE.

6. The method of claim 1, wherein the first message comprises an RRCConnectionRequest message.

7. The method of claim 6, wherein the first message comprises an S-Temporary Mobile Subscriber Identity (S-TMSI) field that identifies the UE, wherein the S-TMSI field includes the virtual channel identifier.

8. The method of claim 1, wherein the first message comprises an RRCConnectionSetupComplete message that includes the virtual channel identifier.

9. The method of claim 8, wherein the first message comprises a Mobility Management Entity Identifier (MMEI) subfield of a Globally Unique MMEI (GUMMEI) field associated with the UE, wherein the MMEI subfield includes the virtual channel identifier.

10. The method of claim 1 further comprising the LTE subsystem determining that the virtual channel is currently unavailable and waiting an amount of time for the virtual channel to become available before sending the first UE the response that allows the connection procedure to proceed.

11. The method of claim 1, wherein the first messages are received from each of the one or more UE as part of a connection procedure to connect the UE to the LTE system in order to transmit on the virtual channel.

12. The method of claim 1 further comprising the LTE subsystem receiving, from network entities, signaling that indicates the status of the virtual channel as available or unavailable.

13. The method of claim 1 further comprising the LTE subsystem sending signaling to network entities, which arbitrate floor control for the virtual channel.

14. A method for reducing set-up signaling in a Long Term Evolution (LTE) system, the method comprising:

sending, by each of one or more user equipment (UE) to a serving cell, a first message including a virtual channel identifier for a virtual channel on which the UE intends to transmit media, wherein the virtual channel is an information flow between a media source and a set of target UE and is associated with a downlink bearer;

when a number of the one or more UE is less than a threshold and when the virtual channel is available, receiving, by each of the one or more UE, a response to the first message that allows the connection procedure to proceed; and

when the number of the one or more UE is greater than the threshold and when the virtual channel is available, receiving, by a number of the one or more UE less than the threshold, a response that allows the connection procedure to proceed and receiving, by all the other UE that sent the first message, a response that terminates the connection procedure.

15. The method of claim 14 wherein the first messages are sent by each of the one or more UE as part of a connection procedure to connect the UE to the LTE system in order to transmit on the virtual channel.

16. The method of claim 15 wherein the first message further comprises an indication of at least one of priority, preemption, and queuing for the intended media transmission by the UE.

17. The method of claim 15, wherein the first message comprises an RRCConnectionRequest having an S-Temporary Mobile Subscriber Identity (S-TMSI) field that identifies the UE and includes the virtual channel identifier.

18. The method of claim 15, wherein the first message comprises an RRCConnectionSetupComplete having a Globally Unique Mobility Management Entity Identifier (GUMMEI) field that identifies the UE and includes the virtual channel identifier.