Method and apparatus for multiple access in communication system

通信系统内包括三种通信资源：争用型接入块(112)、非争用接入块(114)以及所谓的保留块的第二非争用接入块(110)。远端装置(104)每次有数据块要传送给中心站(100)的时候，远端装置(104)都是通过争用型接入块(102)发送数据块。该远端装置(104)还通过保留块(110)发送相应的通知消息。如果中心站(100)接收到通知消息但没有接收到数据块，则中心站(100)向远端装置(104)发送响应消息，该消息指定在非争用接入块(114)内的资源。远端装置(104)通过指定的资源发送数据块。 A communication system is comprised of three communication resources; a contention-type access block (112), a non-contention access block (114) and a second non-contention access block called a reserved block (110). Each time that a remote unit (104) has a block of data to transfer to a hub station (100), the remote unit (104) sends the block of data over the contention-type access block (112). The remote unit (104) it also sends a corresponding notification message over the reserved block (110). If the hub station (100) receives the notification message but not the block of data, the hub station (100) sends a response message to the remote unit (104) which designates the resource within the non-contention access block (114). The remote unit (104) sends the block of data over the designated resource.