Method and apparatus for control channel allocation using the concept of orthogonal sub channels

Abstract

A method and apparatus to improve the quality of control signaling based on signaling messages controlling speech or data transmission over an air interface between at least two Multi-User-Reusing-One-Slot/ Voice Services Over Adaptive Multiuser Channels On One Slot (MUROS/VAMOS) capable wireless transmit/receive units (WTRUs). The WTRUs communicate with each other at the physical layer via signaling messages transmitted in control channels such as Slow Associated Control Channel (SACCH) and Fast Associated Control Channel (FACCH). The SACCH occurences for MUROS/VAMOS multiplexed users are misaligned or shifted to provide the opportunity to exclusively use a full time slot for a single user.

A method and apparatus to improve the quality of control signaling based on signaling messages controlling speech or data transmission over an air interface between at least two Multi-User-Reusing-One-Slot/ Voice Services Over Adaptive Multiuser Channels On One Slot (MUROS/VAMOS) capable wireless transmit/receive units (WTRUs). The WTRUs communicate with each other at the physical layer via signaling messages transmitted in control channels such as Slow Associated Control Channel (SACCH) and Fast Associated Control Channel (FACCH). The SACCH occurences for MUROS/VAMOS multiplexed users are misaligned or shifted to provide the opportunity to exclusively use a full time slot for a single user.

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US8942187B2	2G	15/09/2010	ISLD-201010-010	INTERDIGITAL INC	S1 TS Number: TS 144 006 Version No: ---- Section No: Release : ---- S2 TS Number: TS 144 018 Version No: ---- Section No: Release : ---- S3 TS Number: TS 145 001 Version No: ---- Section No: Release : ---- +2 -2	Yes	Basis Patent
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Technologies

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Claim

1. A wireless transmit/receive unit (WTRU) comprising: a receiver configured to receive a multiframe comprising a first orthogonal sub-channel (OSC) and a second OSC, the first and second OSCs each containing an Idle frame and a control channel frame, wherein a control channel frame of a first OSC overlaps with an Idle frame of a second OSC; and a processor configured to decode one of the first or second OSCs and recover the control channel frame.

2. The WTRU of claim 1, wherein the control channel frame is a slow associated control channel (SACCH) frame or a fast associated control channel (FACCH) frame.

3. The WTRU of claim 1, wherein the receiver is configured to receive a multiframe that contains SACCH information in two frames.

4. The WTRU of claim 1, wherein the receiver is configured to receive a multiframe that contains layer three payload information and two layer one parameters.

5. The WTRU of claim 1, wherein a control channel frame is swapped with an Idle frame on a same OSC.

6. The WTRU of claim 1, wherein a control channel frame is shifted to an adjacent timeslot on a same OSC.

7. A base station (BS) comprising: a channel allocator configured to generate a multiframe comprising a first orthogonal sub-channel (OSC) and a second OSC, the first and second OSCs each containing an Idle frame and a control channel frame, wherein a control channel frame of a first OSC overlaps with an Idle frame of a second OSC; and a transmitter configured to transmit the generated multiframe.

8. The BS of claim 7, wherein the control channel frame is a slow associated control channel (SACCH) frame or a fast associated control channel (FACCH) frame.

9. The BS of claim 7, wherein the transmitter is configured to transmit a multiframe that contains SACCH information in two frames

10. The BS of claim 7, wherein the channel allocator is configured to generate a multiframe that contains layer three payload information and two layer one parameters

11. The BS of claim 7, wherein the channel allocator is configured to swap a control channel frame with an Idle frame on a same OSC

12. The BS of claim 7, wherein the channel allocator is configured to shift a control channel frame to an adjacent timeslot on a same OSC

13. A method for control channel operation comprising: generating a multiframe comprising a first orthogonal sub-channel', '(OSC) and a second OSC, the first and second OSCs each containing an Idle frame and a control channel frame, wherein a control channel frame of a first OSC overlaps with an Idle frame of a second OSC; and transmitting the generated multiframe

14. The method of claim 13, wherein the control channel frame is a slow associated control channel (SACCH) frame or a fast associated control channel (FACCH) frame

15. The method of claim 13, wherein the generated multiframe contains SACCH information in two frames

16. The method of claim 13, wherein the generated multiframe contains layer three payload information and two layer one parameters

17. The method of claim 13, wherein a control channel frame of the generated multiframe is swapped with an Idle frame on a same OSC

18. The method of claim 13, wherein a control channel frame of the generated multiframe is shifted to an adjacent timeslot on a same OSC.']

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