MACHINE TO MACHINE (M2M) FRAME WITHIN A FRAME

• US 20140029568A1
• Filed: 02/09/2012
• Published: 01/30/2014
• Est. Priority Date: 02/09/2011
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Wang, Lei, Murias, Ronald G.
• Granted Patent: US 9,363,819 B2
• Time in Patent Office: Days
• US Class Current: 370/330
• CPC Class Codes: H04J 1/02 Details
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/0039 Frequency-contiguous, i.e. with no allocation of frequencies for one user or terminal between the frequencies allocated to another
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/1469 using time-sharing
• CPC Class Codes: H04L 5/22 using time-division multiplexing
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 56/0015 one node acting as a reference for the others
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/0473 the resource being transmission power
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 72/543 based on requested quality, e.g. QoS
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems

Abstract

A method for use in a wireless communications system includes transmitting M2M signals in an allocated narrow portion of bandwidth in a wideband structure. The allocated portion of the bandwidth may be allocated to narrow band M2M (NB-M2M) devices using a low complexity narrowband technology to access a frame structure within an existing wideband deployment.

Claims

1. A method for use in a wireless communication system, the method comprising allocating a narrowband structure inside of a wideband structure to access a frame structure, wherein the narrowband structure is allocated using a base station such that the narrowband structure includes spectrum for Machine-to-Machine (M2M) communications;

wherein an M2M preamble for a narrow-band is embedded within a downlink frame to allow the M2M device to synchronize to a base station, wherein the narrowband structure is allocated such that the base station may communicate with M2M devices in channels with narrowband bandwidth.

4. The method as in claim 1, wherein the narrowband structure is allocated to satisfy quality of service (QoS) requirements for M2M communications and to minimize impact on other devices in the wireless communication system.

5. The method as in claim 1, wherein the base station supports a narrowband (NB)-M2M region specific physical layer (PHY).

6. The method as in claim 1, wherein the base station supports an NB-M2M device specific medium access control layer (MAC).

7. The method as in claim 1, further comprising using a localized subcarrier allocation in LTE.

8. The method as in claim 1, wherein a subcarrier mapping is used to allocate a portion of the bandwidth to narrow band M2M (NB-M2M) devices

9. The method as in claim 6, wherein a regular frame structure is used.

10. The method as in claim 6, wherein the narrow band structure starts with an M2M preamble, followed by data.

11. The method as in claim 6, wherein any downlink transmissions specific to M2M devices in the narrowband structure are identified by an M2M map.

12. The method as in claim 6, wherein an M2M uplink space within a special narrowband structure is allocated by the base station, indicated by an M2M map, and used by M2M devices.

13. The method as in claim 1, wherein a sampling frequency is calculated as F_s=floor (n·

BW/8000)·

8000, where n is the sampling factor.

14. The method as in claim 1 wherein a subcarrier spacing is calculated as Δ

f=F_s/N_FFT, where N_FFT is the smallest power of two greater than the number of subcarriers in use.

15. The method as in claim 1, wherein the subcarrier spacing does not match the value for the band and changes to the band parameters are made.

17. The method as in claim 1, wherein NB-M2M traffic is supported in a Time Division Multiplexing (TDM) manner.

18. The method as in claim 1, wherein NB-M2M traffic is supported in a Frequency Division Multiplexing (FDM) manner.

19. The method as in claim 1, wherein a Frame Control Header (FCH) is included in the frame to allow NB mobile stations to use.

2-3. -3. (canceled)

16. (canceled)

20. (canceled)