Deferred access method for uplink packet channel
The equipment and techniques disclosed herein introduce a deferred acknowledgement (DACK), in the context of a protocol for a wireless station to request and obtain access to a wireless network resource for communication of one or more data packets. Essentially, a network node, such as a wireless base station, sends the DACK instruction in response to the access request telling the requesting station that the node has heard the request but that the requesting station should defer its transmission. The requesting station need not back off and re-initiate its access request. Instead, the requesting station waits for a later acknowledgement (ACK) granting access to a resource as requested. Although the DACK provides additional signaling, this technique can still utilize a fast ACK type message, that is to say a relatively short signaling packet.
1. A mobile station, comprising:
a spread-spectrum transmitter;
a spread-spectrum receiver; and
a controller coupled to the spread-spectrum transmitter and the spread-spectrum receiver, to control operations of the mobile station to access a wireless communication network to transmit a data packet, including operations comprising:
transmitting a request message over-the-air to a node of the wireless communication network by transmitting a sequence of preamble segments at sequentially increasing power levels, the request message requesting access to a resource of the network;
receiving a first acknowledgement message over-the-air from the node and ceasing transmission of the preamble segments in response to the receipt of the first acknowledgement message, the first acknowledgement message comprising a deferral instruction;
in response to the deferral instruction, deferring transmission of the data packet, with no further transmissions of preamble segments occurring during the deferring of the transmission of the data packet;
receiving a second acknowledgement message over-the-air from the node, the second acknowledgement message comprising an instruction allowing access to the requested network resource; and
in response to the instruction allowing access, transmitting the data packet over-the-air using the requested network resource.
2. The mobile station of claim 1 , wherein the wireless communication network is a cellular network, and the requested network resource is an uplink packet channel for wireless transport of packet data over-the-air to a base station of the cellular network.
3. The mobile station of claim 1 , wherein the request message identifies a specific channel resource of the wireless communication network, and the instruction in the second acknowledgement message allows access to the specific channel resource of the wireless communication network.
4. The mobile station of claim 1 , wherein the instruction in the second acknowledgement message identifies a specific channel resource of the wireless communication network allocated from among a group of channel resources of the wireless communication network.
5. The mobile station of claim 4 , wherein the request message identifies the group of channel resources of the wireless communication network and requests access to the identified group of channel resources.
6. A wireless base station comprising a spread-spectrum transmitter, a spread-spectrum receiver, and a controller coupled to the transmitter and receiver configured to cause the base station to implement functions comprising:
transmitting a request message over-the-air to a node of the wireless communication network by transmitting a sequence of preamble segments at sequentially increasing power levels, the request message requesting access to a resource of the network;
receiving a first acknowledgement message over-the-air from the node and ceasing transmission of the preamble segments in response to the receipt of the first acknowledgement message, the first acknowledgement message comprising a deferral instruction;
in response to the deferral instruction, deferring transmission of the data packet, with no further transmissions of preamble segments occurring during the deferring of the transmission of the data packet;
receiving a second acknowledgement message over-the-air from the node, the second acknowledgement message comprising an instruction allowing access to the requested network resource; and
in response to the instruction allowing access, transmitting the data packet over-the-air using the requested network resource.
7. The wireless base station of claim 6 , wherein the wireless communication network is a cellular network, and the requested network resource is an uplink packet channel for wireless transport of packet data over-the-air to a base station of the cellular network.
8. The wireless base station of claim 6 , wherein the request message identifies a specific channel resource of the wireless communication network, and the instruction in the second acknowledgement message allows access to the specific channel resource of the wireless communication network.
9. The wireless base station of claim 6 , wherein the instruction in the second acknowledgement message identifies a specific channel resource of the wireless communication network allocated from among a group of channel resources of the wireless communication network.
10. The wireless base station of claim 9 , wherein the request message identifies the group of channel resources of the wireless communication network and requests access to the identified group of channel resources.