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A medium access control (MAC) architecture determines transmission latency and block error rate requirements for a plurality of data flows, each data flow having an associated priority and each data flow comprising a plurality of data blocks. The MAC architecture specifies a scheduling entity that d

A medium access control (MAC) architecture determines transmission latency and block error rate requirements for a plurality of data flows, each data flow having an associated priority and each data flow comprising a plurality of data blocks. The MAC architecture specifies a scheduling entity that determines when transmissions are serviced, and by which hybrid automatic repeat request (H-ARQ) entity. H-ARQ entities determine whether each prior block had been successfully transmitted and, if not, request retransmission of unsuccessfully transmitted data blocks. The scheduling of the data blocks takes into account whether or not the previously transmitted data blocks require retransmission. The MAC architecture allows the scheduling entity the ability to initiate new transmissions at any time and to reinitiate previously unsuccessful transmissions at any time.

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What is claimed is: 1. A user equipment comprising: a hybrid automatic repeat request (H-ARQ) entity configured to generate a negative acknowledgement (NACK) after a first high speed medium access control (MAC-hs) data block including first information is transmitted to the user equipment over a wi

What is claimed is: 1. A user equipment comprising: a hybrid automatic repeat request (H-ARQ) entity configured to generate a negative acknowledgement (NACK) after a first high speed medium access control (MAC-hs) data block including first information is transmitted to the user equipment over a wideband code division multiple access (WCDMA) high speed downlink shared channel (HSDSCH), the H-ARQ entity also being configured to receive and process a second MAC-hs data block instead of a third MAC-hs data block, the second MAC-hs data block including second information, the first information being retransmitted to the user equipment in the third MAC-hs data block after the second MAC-hs data block has been transmitted to the user equipment, the second and third MAC-hs data blocks having respective priority class identifiers indicating a higher transmission priority for the second MAC-hs data block than the third-MAC-hs data block; and at least one reordering entity configured to reorder a plurality of MAC-hs data blocks received by the HARQ entity, the plurality of MAC-hs data blocks including the second MAC-hs data block, said at least one reordering entity being configured to forward the plurality of MAC-hs data blocks for processing by protocol layers higher than a protocol layer associated with said at least one reordering entity, each of the plurality of MAC-hs data blocks having a corresponding one of a plurality of transmission sequence numbers (TSNs), the H-ARQ entity transmitting an acknowledgement (ACK) in response to each of the plurality of MAC-hs data blocks, the plurality of MAC-hs data blocks being transmitted to the user equipment on the WCDMA HS-DSCH. 2. The user equipment of claim 1, wherein the at least one reordering entity reorders the plurality of MAC-hs data blocks based on each of the plurality of TSNs. 3. The user equipment of claim 2, wherein the plurality of MAC-hs data blocks is a first plurality of MAC-hs data blocks, the H-ARQ entity is configured such that reception of the third MAC-hs data block is interrupted when a higher priority MAC-hs data block having a higher priority class identifier than the priority class identifier of the third MAC-hs data block required to be received by the H-ARQ entity. 4. The user equipment of claim 3, wherein the H-ARQ entity is configured to receive a new data indicator (NDI), which indicates the interruption of the reception of the third MAC-hs data block. 5. The user equipment of claim 1, wherein the plurality of MAC-hs data blocks is a first plurality of MAC-hs data blocks, the H-ARQ entity being configured to soft combine a second plurality of MAC-hs data blocks and a third plurality of MAC-hs data blocks, the second plurality of MAC-hs data blocks being MAC-hs data blocks which were transmitted to the user equipment and have NACKs associated therewith, and each of the third plurality of MAC-hs data blocks is retransmitted to the user equipment and received by the HARQ entity. 6. The user equipment of claim 5, wherein each of the first plurality of MAC-hs data blocks has an associated queue identity and priority. 7. The user equipment of claim 1, wherein each of the plurality of MAC-hs data blocks has an associated queue identity and priority. 8. The user equipment of claim 1, wherein the plurality of MAC-hs data blocks is a first plurality of MAC-hs data blocks, the H-ARQ entity is configured so that reception of the third MAC-hs data block is interrupted when a higher priority MAC-hs data block has a priority class identifier indicating a higher transmission priority than the priority class identifier of the third MAC-hs data block required to be received by the H-ARQ entity. 9. The user equipment of claim 8, wherein the H-ARQ entity is configured to receive a new data indicator (NDI), which indicates the interruption of the reception of the third MAC-hs data block. 10. The user equipment of claim 1, wherein the plurality of MAC-hs data blocks is a first plurality of MAC-hs data blocks, the H-ARQ entity is configured such that a sequence of a received second plurality of MAC hs data blocks is interrupted for reception of a third plurality of MAC-hs data blocks, each of the third plurality of MAC-hs data blocks having a higher priority class than each of the second plurality of MAC-hs data blocks. 11. The user equipment of claim 10, wherein the user equipment is configured to receive a new data indicator to indicate the interruption of the sequence of the received second plurality of MAC-hs data blocks. 12. The user equipment of claim 10, wherein the user equipment is configured to resume reception of the second plurality of MAC-hs data blocks in said sequence. 13. The user equipment of claim 10, wherein the resumed reception is in response to receipt of a new data indicator. 14. The user equipment of claim 1 wherein each of the plurality of MAC-hs data blocks has a corresponding one of a plurality of priority class and a corresponding one of a plurality of queue identifiers, each of the plurality of MAC-hs data blocks being assigned a respective one of the TSNs based on the plurality of priority class and the plurality of queue identifiers. 15. A method for use by a wideband code division multiple access (W-CDMA) user equipment (UE), the method comprising: generating a negative acknowledgement (NACK) after a first high speed medium access control (MAC-hs) data block carrying first information has been transmitted to the UE; receiving a second MAC-hs data block over a W-CDMA high speed downlink shared channel (HS-DSCH) instead of a third MAC-hs data block, the second MAC-hs data block including second information, the first information being retransmitted to the UE in the third MAC-hs data block after the second MAC-hs data block has been transmitted to the UE, the second and third MAC-hs data blocks having respective priority class identifiers indicating a higher transmission priority for the second MAC-hs data block than the third-MAC-hs data block; sending an acknowledgement (ACK) in response to each of a plurality of received MAC-hs data blocks, the plurality of received MAC-hs data blocks including the received second MAC-hs data block, wherein each of the plurality of received data blocks has a transmission sequence number (TSN); reordering the plurality of MAC-hs data blocks; and forwarding the plurality of received MAC-hs data blocks for processing by protocol layers, which are higher than a layer associated with said reordering. 16. The method of claim 15, wherein the reordering is based on the TSNs. 17. The method of claim 16, wherein each of the plurality of MAC-hs data blocks has an associated queue identity and priority. 18. The method of claim 16, wherein the plurality of MAC-hs data blocks is a first plurality of MAC-hs data blocks, the method further comprising interrupting reception of the third MAC-hs data block when a higher priority MAC-hs data block having a higher priority class identifier than the priority class identifier required to be received by the H-ARQ entity. 19. The method of claim 18, further comprising receiving a new data indicator (NDI), which indicates the interruption of the reception of the third MAC-hs data block. 20. The method of claim 15, wherein the plurality of MAC-hs data blocks is a first plurality of MAC-hs data blocks, the method further comprising soft combining a second plurality of MAC-hs data blocks and a third plurality of MAC-hs data blocks, the second plurality of MAC-hs data blocks being MAC-hs data blocks which were transmitted to the user equipment and have NACKs associated therewith, and each of the third plurality of MAC-hs data blocks is retransmitted to the user equipment and received by the HARQ entity. 21. The method of claim 15, wherein each of the plurality of MAC-hs data blocks has an associated queue identity and priority. 22. The method of claim 15, wherein the plurality of MAC-hs data blocks is a first plurality of MAC-hs data blocks, the method further comprising interrupting reception of the third MAC-hs data block when a higher priority MAC-hs data block having a higher priority class identifier than the priority class identifier of the third MAC-hs data block required to be received by the H-ARQ entity. 23. The method of claim 15, further comprising receiving a new data indicator (NDI), which indicates the interruption of the reception of the third MAC-hs data block. 24. The method of claim 15, wherein the plurality of MAC-hs data blocks is a first plurality of MAC-hs data blocks, the method further comprising interrupting a sequence of a received second plurality of MAC hs data blocks for reception of a third plurality of MAC-hs data blocks, each of the third plurality of MAC-hs data blocks having a higher priority class identifier than each of the second plurality of MAC-hs data blocks. 25. The method of claim 24, further comprising receiving a new data indicator to indicate the interruption of the sequence of the received second plurality of MAC-hs data blocks. 26. The method of claim 24, further comprising resuming reception of the second plurality of MAC-hs data blocks in said sequence. 27. The method of claim 24, further comprising resuming reception of the second plurality of MAC-hs data blocks in said sequence in response to receipt of a new data indicator. 28. The method of claim 15, wherein each of the plurality of MAC-hs data blocks has a corresponding one of a plurality of priority class identifiers and a corresponding one of a plurality of queue identifiers, the method further comprising assigning each of the plurality of MAC-hs data blocks a respective one of the TSNs based on the plurality of priority class identifiers and the plurality of queue identifiers.