Dynamically establishing relay voice-bearer in response to detecting of voice communication on other relay bearer

1. A method for controlling bearer establishment in a wireless communication system, the method comprising:

detecting a flow of voice traffic on a relay-bearer communication path that extends between a relay and a relay gateway system via a donor base station, wherein the voice traffic is digitized voice data being communicated in a voice-over-Internet-Protocol (VoIP) call of a user equipment (UE) served by the relay, wherein, for the VoIP call, the UE has a dedicated VoIP bearer that extends between the UE and a conventional gateway system via the relay, the donor base station, and the relay gateway system, the flow of the voice traffic being on the dedicated VoIP bearer; and

responsive to at least the detecting of the flow of the voice traffic over the relay-bearer communication path, triggering dynamic establishment for the relay of a dedicated VoIP relay bearer that extends between the relay and the relay gateway system via the donor base station, wherein continued voice traffic of the VoIP call then flows over a dynamically established dedicated VoIP relay bearer.

2. The method of claim 1 , wherein detecting the flow of the voice traffic on the relay-bearer communication path comprises detecting the flow of the voice traffic using deep packet inspection of one or more packets being communicated on the relay-bearer communication path.

3. The method of claim 1 , wherein the relay has a default relay bearer that extends between the relay and the relay gateway system via the donor base station, and

wherein the detected flow of the voice traffic is on the default relay bearer, wherein the continued voice traffic of the UE's VoIP call then flows over the dynamically established dedicated VoIP relay bearer rather than over the default relay bearer.

4. The method of claim 3 , wherein the default relay bearer has a quality of service control indicator (QCI) of 6, and

wherein the dedicated VoIP relay bearer has a QCI of 1.

5. The method of claim 1 , wherein the relay comprises a relay base

station configured to serve the UE over a second air interface and comprises a relay UE that is integrated or interfaced with the relay base station and that is served by the donor base station over a first air interface, and wherein detecting the flow of the voice traffic on the relay-bearer communication path is done by the relay UE.

6. The method of claim 5 , wherein the dedicated VoIP relay bearer extends between the relay UE and the relay gateway system via the donor base station, and

wherein triggering dynamic establishment for the relay of the dedicated VoIP relay bearer comprises the relay UE engaging in signaling that requests establishment of the dedicated VoIP relay bearer.

7. The method of claim 1 , wherein detecting the flow of the voice traffic on the relay-bearer communication path is done by the relay gateway system.

8. The method of claim 7 , wherein triggering dynamic establishment for the relay of the dedicated VoIP relay bearer comprises the relay gateway system engaging in signaling that requests establishment of the dedicated VoIP relay bearer.

9. The method of claim 1 , further comprising:

after the dynamic establishment for the relay of the dedicated VoIP relay bearer, detecting cessation of the flow of voice traffic on the relay-bearer communication path; and

responsive to at least detecting the cessation of the flow of voice traffic on the relay-bearer communication path, triggering release of the dedicated VoIP relay bearer.

10. The method of claim 1 , wherein the relay gateway system includes a packet-data network gateway (PGW) that communicates directly with a relay UE of the relay.

11. The method of claim 1 , wherein the conventional gateway system includes a packet-data network gateway (PGW) that communicates directly with the UE.

12. A method for controlling bearer establishment in a wireless communication system, the method comprising: detecting a flow of a real-time media traffic on a relay-bearer communication path that extends between a relay and a relay gateway system via a donor base station, wherein the flow of the real-time media traffic is on a default relay bearer that extends between a user equipment (UE) and a conventional gateway system via the relay, the donor base station, and the relay gateway system; and responsive to at least the detecting of the flow of the real-time media traffic over the relay-bearer communication path, triggering dynamic establishment for the relay of a dedicated relay bearer that extends between the relay and the relay gateway system via the donor base station, wherein the real-time media traffic then flows over a dynamically established dedicated relay bearer rather than over the default relay bearer.

13. The method of claim 12 , wherein the real-time media traffic is of a type selected from the group consisting of (i) conversational voice, (ii) conversational video, and (iii) gaming.

14. A system for controlling bearer establishment in a wireless communication system, the system comprising:

at least one processing unit;

at least one non-transitory data storage; and

program instructions stored in the at least one non-transitory data storage and executable by the at least one processing unit to carry out operations including:

detecting a flow of voice traffic on a relay-bearer communication path that extends between a relay and a relay gateway system via a donor base station, wherein the voice traffic is digitized voice data being communicated in a voice-over-Internet-Protocol (VoIP) call of a user equipment (UE) served by the relay, wherein, for the VoIP call, the UE has a dedicated VoIP bearer that extends between the UE and a conventional gateway system via the relay, the donor base station, and the relay gateway system, the detected flow of the voice traffic being on the dedicated VoIP bearer, and

responsive to at least the detecting of the flow of the voice traffic over the relay-bearer communication path, triggering dynamic establishment for the relay of a dedicated VoIP relay bearer that extends between the relay and the relay gateway system via the donor base station, wherein continued voice traffic of a UE's VoIP call then flows over a dynamically established dedicated VoIP relay bearer.

15. The system of claim 14 , wherein the relay has a default relay bearer that extends between the relay and the relay gateway system via the donor base station, and wherein the detected flow of the voice traffic is on the default relay bearer, wherein the continued voice traffic of the UE's VoIP call then flows over the dynamically established dedicated VoIP relay bearer rather than over the default relay bearer.

16. The system of claim 14 , wherein the relay comprises a relay base station configured to serve the UE over a second air interface and comprises a relay UE that is integrated or interfaced with the relay base station and that is served by the donor base station over a first air interface, and wherein the system is embodied at the relay UE.

17. The system of claim 16 , wherein the triggering dynamic establishment for the relay of the dedicated VoIP relay bearer comprises causing the relay UE to engage in signaling that requests establishment of the dedicated VoIP relay bearer.

18. The system of claim 14 , wherein the system is embodied at the relay gateway system.

19. The system of claim 18 , wherein triggering dynamic establishment

for the relay of the dedicated VoIP relay bearer comprises causing the relay gateway system to engage in signaling that requests establishment of the dedicated VoIP relay bearer.

20. The system of claim 14 , wherein the operations further comprise: after the dynamic establishment for the relay of the dedicated VoIP relay bearer, detecting cessation of the flow of voice traffic on the relay-bearer communication path; and

responsive to at least detecting the cessation of the flow of voice traffic on the relay-bearer communication path, triggering release of the dedicated VoIP relay bearer.