Abstract
A method and system for an enhanced uplink (EU) operation in a wireless communication system during soft handover. The system comprises a wireless transmit/receive unit (WTRU) at least two Node-Bs and a radio network controller (RNC). One Node-B may be designated as a primary Node-B and the primary Node-B may control EU operation during soft handover including uplink scheduling and hybrid automatic repeat request (H-ARQ). Soft buffer corruption is avoided during soft handover by controlling H-ARQ by the primary Node-B. Alternatively an RNC may control EU operation during soft handover including H-ARQ. In this case an RNC generates final acknowledge/non-acknowledge (ACK/NACK) decision based on the error check results of the Node-Bs.
| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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| Declaration Date | Declaration Reference | Declaring Company | Specification Information | ||||||
| 3G | 21/03/2007 | ISLD-200802-001 | INTERDIGITAL INC |
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Resource configuration
Product
Use Cases
Wireless communication
Services
Claim
1. A method comprising:
transmitting a data packet to a Node-B via a primary cell and at least one non-primary cell, the primary cell and the at least one non-primary cell being controlled by the Node-B, wherein the data packet is sent via the primary cell and the at least one non-primary cell over an enhanced uplink (EU) channel;
receiving an acknowledgement (ACK) from the Node-B on a condition that the transmitted data packet is successfully decoded; and
receiving a negative acknowledgement (NACK) from the Node-B on a condition that the transmitted data packet is not successfully decoded;
wherein the NACK is received only via the primary cell.
2. The method of claim 1, wherein the ACK or NACK is received via the primary cell over one or more downlink channels shared by a plurality of wireless transmit/receive units.
3. The method of claim 2, further comprising:
receiving a shared channel indicator from the primary cell;
wherein the shared channel indicator indicates over which of the one or more downlink channels, downlink messages are allowed to be received.
4. The method of claim 1, further comprising:
receiving downlink messages via the primary cell during handover.
5. The method of claim 1, wherein the ACK is received via the primary cell and the at least one non-primary cell.
6. An apparatus comprising:
a transmitter, wherein the transmitter transmits a data packet to a Node-B via a primary cell and at least one non-primary cell, the primary cell and the at least one non-primary cell being controlled by the Node-B, wherein the data packet is sent via the primary cell and the at least one non-primary cell over an enhanced uplink (EU) channel; and
a receiver, wherein the receiver:
receives an acknowledgement (ACK) from the Node-B on a condition that the transmitted data packet is successfully decoded; and
receives a negative acknowledgement (NACK) from the Node-B on a condition that the transmitted data packet is not successfully decoded;
wherein the NACK is received only via the primary cell.
7. The apparatus of claim 6, wherein the ACK or NACK is received via the primary cell over one or more downlink channels shared by a plurality of wireless transmit/receive units.
8. The apparatus of claim 7, wherein the receiver further:
receives a shared channel indicator via the primary cell;
wherein the shared channel indicator indicates over which of the downlink channels the receiver is allowed to receive messages.
9. The apparatus of claim 6, wherein the ACK is received via both the primary cell and the at least one non-primary cell.
10. The apparatus of claim 6, wherein the receiver further:
receives downlink messages via the primary cell during handover.
11. The apparatus of claim 6, wherein the apparatus is a wireless transmit/receive unit.
12. A method for operating a Node-B, the method comprising:
receiving a data packet from a wireless transmit/receive unit (WTRU) via a primary cell and at least one non-primary cell controlled by the Node-B, wherein the data packet is received from the WTRU over an enhanced uplink (EU) channel;
combining the data packet received via the primary cell and the data packet received via the at least one non-primary cell into a combined data packet;
transmitting an acknowledgement (ACK) to the WTRU on a condition that the combined data packet is successfully decoded; and
transmitting a negative acknowledgement (NACK) to the WTRU on a condition that the combined data packet is not successfully decoded;
wherein the NACK is transmitted only via the primary cell.
13. The method of claim 12, wherein the ACK or NACK is transmitted over one or more downlink channels shared by a plurality of WTRUs.
14. The method of claim 13, further comprising:
transmitting a shared channel indicator via the primary cell;
wherein the shared channel indicator indicates over which of the downlink channels the WTRU is allowed to receive messages.
15. The method of claim 12, wherein the ACK is transmitted via the primary cell and the at least one non-primary cell.
16. The method of claim 12, wherein the data packet received via the primary cell and the data packet received via the at least one non-primary cell is combined using maximum ratio combining.
17. The method of claim 12, further comprising:
transmitting downlink messages to the WTRU via the primary cell during handover.
18. The method of claim 12, further comprising:
sending an ACK to a radio network controller (RNC) on the condition that the combined data packet is successfully decoded;
wherein the RNC controls the Node-B.
19. A Node-B comprising:
a receiver and a transmitter;
wherein the receiver:
receives a data packet from a wireless transmit/receive unit (WTRU) via a primary cell and at least one non-primary cell controlled by the Node-B, wherein the data packet is received over an enhanced uplink (EU) channel;
combines the data packet received via the primary cell and the data packet received via the at least one non-primary cell into a combined data packet; and
decodes the combined data packet,
and wherein the transmitter:
transmits an acknowledgement (ACK) to the WTRU on a condition that the combined data packet is successfully decoded; and
transmits, via only the primary cell, a negative acknowledgement (NACK) to the WTRU on a condition that the combined data packet is not successfully decoded.
20. The Node-B of claim 19, wherein the ACK or NACK is transmitted via the primary cell over one or more downlink channels shared by a plurality of WTRUs.
21. The Node-B of claim 20, wherein the transmitter further:
transmits a shared channel indicator via the primary cell, wherein the shared channel indicator indicates over which of the downlink channels of at least one non-primary cell the WTRU is allowed to receive messages.
22. The Node-B of claim 19, wherein the ACK is transmitted via both the primary cell and the at least one non-primary cell.
23. The Node-B of claim 19, wherein the data packet received via the primary cell and the data packet received via the at least one non-primary cell is combined using maximum ratio combining.
24. The Node-B of claim 19, wherein the transmitter further:
transmits downlink messages to the WTRU via the primary cell during handover.
25. The Node-B of claim 19 wherein the transmitter further:
sends an ACK to a radio network controller (RNC) on the condition that the combined data packet is successfully decoded;
wherein the RNC controls the Node-B.
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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.
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