Abstract
A method and apparatus for radio link synchronization and power control in CELL_FACH state and idle mode are disclosed. A wireless transmit/receive unit (WTRU) transmits a random access channel (RACH) preamble and receives an acquisition indicator acknowledging the RACH preamble via an acquisition indicator channel (AICH) and an index to an enhanced dedicated channel (E-DCH) resource. The WTRU determines a start of an E-DCH frame. An F-DPCH timing offset is defined with respect to one of the RACH access slot and an AICH access slot carrying the acquisition indicator. A relative F-DPCH timing offset may be signaled to the WTRU and the WTRU may determine a start of an E-DCH frame based on the relative F-DPCH timing offset and timing of an AICH access slot including the acquisition indicator. The WTRU may transmit a dedicated physical control channel (DPCCH) power control preamble before starting an E-DCH transmission.
Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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Declaration Date | Declaration Reference | Declaring Company | Specification Information | ||||||
3G | 14/09/2009 | ISLD-200910-006 | INTERDIGITAL INC |
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No | Family Member | |||
3G | 31/10/2019 | ISLD-201909-015 | INTERDIGITAL INC |
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No | Family Member |
Specification Information
Specification Information
Technologies
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Technologies
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Product
Use Cases
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Services
Claim
1. A method for radio link synchronization and power control in CELL_FACH state, the method comprising:
transmitting a system information block (SIB) including an offset value, value, wherein the SIB includes an indicator of a subset of access slots associated with a random access channel (RACH) preamble;
receiving the RACH preamble in at least one of the subset of access slots;
transmitting an acquisition indicator in response to the RACH preamble;
transmitting a fractional dedicated physical channel (F-DPCH) according to an F-DPCH time, the F-DPCH time being based on a relative F-DPCH timing offset parameter and timing of an acquisition indicator channel (AICH) access slot including the acquisition indicator, wherein the relative F-DPCH timing offset parameter is 256 chips multiplied by the offset value; and
receiving a dedicated physical control channel (DPCCH) according to a DPCCH time, the DPCCH time and the F-DPCH time being offset by a predetermined offset.
2. The method of claim 1 wherein the DPCCH time is calculated by adding the predetermined offset to the F-DPCH time.
3. The method of claim 1 wherein the DPCCH time is calculated by adding the relative F-DPCH timing offset parameter to a beginning of the AICH access slot including the acquisition indicator, and the F-DPCH time is calculated by subtracting the predetermined offset from the DPCCH time.
4. The method of claim 1 wherein the DPCCH begins with a power control preamble.
5. The method of claim 1 wherein the RACH preamble is associated with a randomly selected signature.
6. The method of claim 5 wherein the signature is randomly selected from a set of up to 16 signatures.
7. The method of claim 1, further comprising:
receiving a RACH message via an enhanced dedicated channel (E-DCH).
8. The method of claim 7 wherein the start of an E-DCH frame occurs at a slot that minimizes a delay between the RACH preamble reception and the RACH message reception.
9. The method of claim 1 wherein the acquisition indicator indicates an index to an enhanced dedicated channel (E-DCH) resource.
10. The method of claim 1 wherein the predetermined offset is 1024 chips.
11. The method of claim 1 wherein the RACH preamble is associated with in a randomly selected access slot.
12. The method of claim 1 wherein the acquisition indicator indicates an acknowledgement.
13. A Node B for radio link synchronization and power control in CELL_FACH state, the Node B comprising:
a transmit/receive unit configured to transmit a system information block (SIB) including an offset value, wherein the SIB includes an indicator of a subset of access slots associated with a random access channel (RACH) preamble, receive the RACH preamble, wherein the RACH preamble is received in at least one of the subset of access slots, transmit an acquisition indicator in response to the RACH preamble, transmit a fractional dedicated physical channel (F-DPCH) according to an F-DPCH time, the F-DPCH time being based on a relative F-DPCH timing offset parameter and timing of an acquisition indicator channel (AICH) access slot including the acquisition indicator, wherein the relative F-DPCH timing offset parameter is 256 chips multiplied by the offset value, and receive a dedicated physical control channel (DPCCH) according to a DPCCH time, the DPCCH time and the F-DPCH time being offset by a predetermined offset.
14. The Node B of claim 13 wherein the DPCCH time is calculated by adding the predetermined offset to the F-DPCH time.
15. The Node B of claim 13 wherein the DPCCH time is calculated by adding the relative F-DPCH timing offset parameter to a beginning of the AICH access slot including the acquisition indicator, and the F-DPCH time is calculated by subtracting the predetermined offset from the DPCCH time.
16. The Node B of claim 13 wherein the DPCCH begins with a power control preamble.
17. The Node B of claim 13 wherein the RACH preamble is associated with a randomly selected signature.
18. The Node B of claim 17 wherein the signature is randomly selected from a set of up to 16 signatures.
19. The Node B of claim 13, further comprising the transmit/receive unit being further configured to receive a RACH message via an enhanced dedicated channel (E-DCH).
20. The Node B of claim 19 wherein the start of an E-DCH frame occurs at a slot that minimizes a delay between the RACH preamble reception and the RACH message reception.
21. The Node B of claim 13 wherein the acquisition indicator indicates an index to an enhanced dedicated channel (E-DCH) resource.
22. The Node B of claim 13 wherein the predetermined offset is 1024 chips.
23. The Node B of claim 13 wherein the RACH preamble is associated with in a randomly selected access slot.
24. The Node B of claim 13 wherein the acquisition indicator indicates an acknowledgement.
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
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