Machine to machine (m2m) frame within a frame

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.

What is claimed is: 
     
         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. 
     
     
         2 . The method as in  claim 1 , wherein s preamble for a band is embedded within s downlink frame to allow the M2M device to synchronize to s base station. 
     
     
         3 . The method as in  claim 1 , 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 8 , wherein a regular frame structure is used. 
     
     
         10 . The method as in  claim 8 , wherein the narrow band structure starts with an M2M preamble, followed by data. 
     
     
         11 . The method as in  claim 8 , wherein any downlink transmissions specific to M2M devices in the narrowband structure are identified by an M2M map. 
     
     
         12 . The method as in  claim 8 , 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 Δf=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. 
     
     
         16 . The method as in  claim 1 , wherein the preamble for a band is embedded within the downlink frame to allow the M2M device to synchronize to the base station. 
     
     
         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. 
     
     
         20 . A method for use in a wireless communications system, the method comprising:
 transmitting M2M signals, the signals are transmitted in an allocated narrow portion of bandwidth in a wideband structure, wherein the allocated portion of the bandwidth is allocated to narrow band M2M (NB-M2M) devices using a low complexity narrowband technology to access a frame structure within an existing wideband deployment.