Patent ID: 9544710
Date: 2017-01-10
CPC Classifications: H04L,H04W

Claim:
1. A method to perform machine-to-machine (M2M) communication in a wireless network, the method comprising: transmitting, by a delegate M2M mobile station in the wireless network, a ranging code to a base station in the wireless network, wherein the delegate M2M mobile station transmits on behalf of a group of one or more M2M mobile stations, wherein the one or more M2M mobile stations in the group share a common characteristic; not receiving, by the delegate M2M mobile station, a ranging acknowledgement from the base station; generating, by one of the one or more M2M mobile stations in the group, a group backoff slot index to be used by each of the one or more M2M mobile stations in the group, wherein the group backoff slot index is derived from a pseudo-random number generator and an identifier of the group, wherein the group backoff slot index is further derived using the following formula: wherein MGID is the identifier, Backoff_Window is a maximum number of backoff slots in a range, wherein the range is related to a number of random access retries allowed for a wireless channel, and Initial_Offset is an initial value for the pseudo-random number generator; and performing, by each of the one or more M2M mobile stations in the group, a backoff operation of a number of slots, wherein the number is based on the group backoff slot index.