Abstract
Described herein are techniques for performing cell reselection in a wireless transmit/receive unit (WTRU). The method includes receiving a radio network terminal identifier (RNTI) from a first cell, transitioning from a connected state, performing cell reselection and to select a second cell different than the first cell, initiating resumption of communication by transmitting the RNTI to the second cell and resuming communications based on the transmitted RNTI.
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Claim
1. A wireless transmit/receive unit (WTRU) configured for operation in a first state and a second state, the first state being characterized by the WTRU using dedicated logical channels and the second state being characterized by the WTRU not using dedicated logical channels, the WTRU comprising:
a transceiver and a processor configured to cause the WTRU to:
receive a radio network terminal identifier (RNTI) from a first cell in a message;
transition from the first state to the second state and cease communications with the first cell;
perform cell reselection and to select a second cell different than the first cell while in the second state; and
transmit the RNTI to the second cell and resume communications with the second cell.
2. The WTRU of claim 1 wherein the transceiver and the processor are configured to cause the WTRU to transmit a random access preamble prior to the transmitting of the RNTI.
3. The WTRU of claim 1 wherein the transceiver and the processor are configured to cause the WTRU to read system information blocks of the second cell prior to selecting the second cell.
4. The WTRU of claim 1 wherein the transceiver and the processor are configured to cause the WTRU to take measurements of a plurality of cells to perform cell reselection.
5. A method performed by a wireless transmit/receive unit (WTRU) configured for operation in a first state and a second state, the first state being characterized by the WTRU using dedicated logical channels and the second state being characterized by the WTRU not using dedicated logical channels, the method comprising:
receiving a radio network terminal identifier (RNTI) from a first cell in a message;
transitioning from the first state to the second state and ceasing communications with the first cell;
performing cell reselection and selecting a second cell different than the first cell while in the second state; and
transmitting the RNTI to the second cell and resuming communications with the second cell.
6. The method of claim 5 further comprising transmitting a random access preamble prior to the transmitting of the RNTI.
7. The method of claim 5 further comprising reading system information blocks of the second cell prior to selecting the second cell.
8. The method of claim 5 further comprising taking measurements of a plurality of cells to perform cell reselection.
9. A base station comprising:
a transceiver and a processor configured to cause the base station to:
communicate with a wireless transmit/receive unit (WTRU) over a first cell;
transmit a message including a radio network temporary identifier (RNTI) to the WTRU over the first cell, wherein the receipt of the message causes the WTRU to transition from a first state to a second state and to cease communications with the first cell, wherein the first state is characterized by the WTRU using dedicated logical channels and the second state is characterized by the WTRU not using dedicated logical channels; and
receive the RNTI from the WTRU over a second cell and communicate with the WTRU using the second cell, wherein the second cell is different than the first cell.
10. The base station of claim 9 wherein the transceiver and the processor are configured to cause the base station to receive a random access preamble from the WTRU prior to receiving the RNTI.
11. A method performed by a base station comprising:
communicating with a wireless transmit/receive unit (WTRU) over a first cell;
transmitting a message including a radio network temporary identifier (RNTI) to the WTRU over the first cell, wherein the receipt of the message causes the WTRU to transition from a first state to a second state and to cease communications with the first cell, wherein the first state is characterized by the WTRU using dedicated logical channels and the second state is characterized by the WTRU not using dedicated logical channels; and
receiving the RNTI from the WTRU over a second cell and communicate with the WTRU using the second cell, wherein the second cell is different than the first cell.
12. The method of claim 11 further comprising receiving a random access preamble from the WTRU prior to receiving the RNTI.
Associated Portfolios
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The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.