Method of signaling traffic mode transition in a wireless communications system
View Patent ↗In a UMTS wireless communication system a UE autonomously determines that it is going to transit from an active traffic mode into an idle traffic mode and informs the NodeBs in its active set that it is doing so. It does so either by using Layer 1 signaling, using the uplink DPCCH to send a message to the NodeBs indicating the transition, or by using Layer 2 signaling by via MAC PDUs that contain the message, which are delivered on the uplink E-DPDCH to the NodeBs.
1. A method at a mobile station in a wireless communication system comprising the steps of:
autonomously deciding that it should transit between an active traffic mode and an idle traffic mode; and
providing an indication of the traffic mode change to an associated base station by a signaling message sent via an uplink dedicated control channel, wherein the signaling message for indication of traffic mode change is provided by arranging a sequence of bits derived from a bits of a control message sent in one or more transmission intervals for the uplink dedicated control channel into another message recognizable by the associated base station as representing the traffic-mode-change signaling message, and detecting the another message when the uplink dedicated control channel is received at a base station.
2. The method of claim 1 wherein decision to transit between the active traffic mode and the idle traffic mode is determined based on a level of traffic on an uplink and downlink over a predetermined amount of time.
3. The method of claim 1 wherein the signaling message is sent using Layer 1 signaling.
4. The method of claim 3 wherein the signaling message is sent using feedback indicator (FBI) bits sent in one or more slots of an uplink dedicated physical control channel.
5. The method of claim 4 wherein the dedicated physical control channel is the DPCCH in a Universal Mobile Telecommunications System (UMTS).
6. The method of claim 1 wherein the signaling message is sent using Layer 2 signaling on an uplink dedicated physical data channel.
7. The method of claim 6 wherein the signaling message is sent using one or more MAC PDUs.
8. The method of claim 7 further comprising increasing the power at which the MAC PDUs containing the message are transmitted.
9. The method of claim 7 wherein one or more MAC-e SI PDUs are used to carry the message.
10. The method of claim 7 wherein a part of a MAC-e header in one or more PDUs is used to carry the message.
11. The method of claim 6 wherein the uplink dedicated physical data channel is the enhanced dedicated physical data channel (E-DPDCH) in a Universal Mobile Telecommunications System (UMTS).
12. A method of communication at a mobile station in a wireless communication system comprising the steps of:
autonomously determining at the mobile station to transit between an active traffic mode and an idle traffic mode;
providing an indication of the traffic mode change to an associated base station by a signaling message sent via layer 1 signaling on an uplink dedicated control channel, wherein the signaling message for indication of traffic mode change is provided by arranging a sequence of bits derived from a bits of a control message sent in one or more transmission intervals for the uplink dedicated control channel into another message recognizable by the associated base station as representing traffic-mode-change signaling message, and detecting the another message when the uplink dedicated control channel-is received at a base station.
13. A method of communication at a mobile station in a wireless communication system comprising the steps of:
autonomously determining at the mobile station to transit between an active traffic mode and an idle traffic mode;
providing an indication of the traffic mode change to an associated base station by a signaling message sent using layer 2 signaling via medium access control (MAC) packet data units (PDUs), wherein the signaling message for indication of traffic mode change is provided by arranging a sequence of bits derived from bits of one of one or more of the PDUs into a codeword recognizable by the associated base station as representing the traffic-mode-change signaling message, and detecting the codeword when the MAC PDUs are received at a base station.