Method and apparatus for performing ranging at M2M device in a wireless communication system

A method for transmitting ranging information at a Base Station (BS) in a wireless communication system, the method comprising:

• transmitting a Primary SuperFrame Header (P-SFH) and a Secondary SuperFrame Header (S-SFH);
• and
• transmitting an Advanced Air Interface-System Configuration Descriptor (AAI-SCD) message,
• wherein first count information included in the S-SFH is increased whenever a M2M dedicated ranging information are changed,
• wherein information indicating a change in the S-SFH, included in the P-SFH, are not changed by an update of the first count information that is due to the change of the M2M dedicated ranging information, and
• wherein the S-SFH including the first count information is an S-SFH SubPacket 3 Information Element (S-SFH SP3 IE).

A Machine to Machine (M2M) device for performing ranging in a wireless communication system, comprising:

• a Radio Frequency (RF) unit;
• and
• a processor,
• wherein the processor receives a Primary SuperFrame Header (P-SFH), a Secondary SuperFrame Header (S-SFH), and an Advanced Air Interface-System Configuration Descriptor (AAI-SCD) message through the RF unit and controls dedicated ranging to be performed using M2M dedicated ranging information included in the AAI-SCD message, and
• wherein first count information included in the S-SFH is increased whenever the M2M dedicated ranging information are changed,
• wherein information indicating a change in the S-SFH, included in the P-SFH, are not changed by an update of the first count information that is due to the change of the M2M dedicated ranging information, and
• wherein the S-SFH including the first count information is an S-SFH SubPacket 3 Information Element (S-SFH SP3 IE).

A Base Station (BS) for transmitting ranging information in a wireless communication system, comprising:

• a Radio Frequency (RF) unit;
• and
• a processor,
• wherein the processor transmits a Primary SuperFrame Header (P-SFH), a Secondary SuperFrame Header (S-SFH), and an Advanced Air Interface-System Configuration Descriptor (AAI-SCD) message through the RF unit, and
• wherein first count information included in the S-SFH is increased whenever a M2M dedicated ranging information are changed,
• wherein information indicating a change in the S-SFH, included in the P-SFH, are not changed by an update of the first count information that is due to the change of the M2M dedicated ranging information, and
• wherein the S-SFH including the first count information is an S-SFH SubPacket 3 Information Element (S-SFH SP3 IE).