MAC multiplexing and TFC selection procedure for enhanced uplink

• US 20060268821A1
• Filed: 04/21/2006
• Published: 11/30/2006
• Est. Priority Date: 04/29/2005
• Status: Active Grant

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Terry, Stephen E.
• Granted Patent: US 7,701,922 B2
• Time in Patent Office: Days
• US Class Current: 370/349
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 28/065 using assembly or disassembly of packets
• CPC Class Codes: H04W 72/1268 of uplink data flows
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A method implemented in a wireless communication system including a wireless transmit/receive unit (WTRU), a Node-B and a radio network controller (RNC) for quantizing multiplexed data allowed by grants to closely match a selected enhanced uplink transport format combination (E-TFC) transport block size is disclosed. The amount of scheduled and non-scheduled data allowed to be transmitted is quantized so that the amount of data multiplexed into an enhanced uplink (EU) medium access control (MAC-e) protocol data unit (PDU) more closely matches the selected E-TFC transport block size. In an embodiment, the amount of buffered data allowed to be multiplexed by at least one grant, (a serving grant and/or a non-serving grant), is quantized so that the sum of scheduled and non-scheduled data including MAC header and control information multiplexed into a MAC-e PDU more closely matches the selected E-TFC transport block size.

Claims

1. A method for multiplexing data for an enhanced dedicated channel (E-DCH), the method comprising:

determining a size of data associated with a serving grant;

determining a size of data associated with non-scheduled grants by summing for each dedicated channel medium access control (MAC-d) flow with a size of its non-scheduled grant or its available data;

determining a size associated with medium access control (MAC) header information for multiplexing onto a medium access control E-DCH (MAC-e) packet data unit (PDU);

determining supported E-DCH transport format combinations (E-TFC);

if a number of bits that are permitted to be transmitted exceeds a first sum of the determined serving grant size, the determined scheduling grant size and MAC header information;

selecting a largest E-TFC that does not exceed the first sum; and

multiplexing bits from the MAC-d flows and the MAC header information; and

transmit the multiplexed bits using the selected E-TFC as a MAC-e PDU.

2. The method of claim 1 further comprising providing a power offset and determining a largest supported E-TFC based on the provided power offset and a maximum number of transmitted bits is limited to the largest supported E-TFC.

3. The method of claim 2 wherein if the number of bits that are permitted to be transmitted does not exceeds a first sum of the determined serving grant size, the determined scheduling grant size and MAC header information, the largest supported E-TFC is selected for multiplexing the MAC-d flows.

4. The method of claim 1 wherein the multiplexing bits from the MAC-d flows and the MAC header information comprises:

in order of priority logical channel, multiplexing MAC-d flows from the non-scheduled grants for transmission using the selected E-TFC.

5. The method of claim 1 wherein the multiplexing bits from the MAC-d flows and the MAC header information comprises:

in order of priority logical channel, multiplexing MAC-d flows from the serving grants for transmission using the selected E-TFC.

6. The method of claim 5 wherein a number of bits permitted to be multiplexed for serving grants is derived by subtracting from the first sum a permitted number of bits for the non-scheduled grants and the MAC header information.

7. The method of claim 1 wherein if a number of bits of the multiplexed MAC-d flows and the MAC header information is less than the size of the selected E-TFC, padding is multiplexed onto the multiplexed MAC-d flows and the MAC header information so that the size of the selected E-TFC is met.

8. The method of claim 7 wherein a size of the padding is less than a size of a MAC-d flow.

9. The method of claim 1 wherein a user equipment performs the multiplexing bits from the MAC-d flows and the MAC header information.

10. A wideband code division multiple access (W-CDMA) frequency division duplex (FDD) user equipment (UE) comprising:

a medium access control—

dedicated channel (MAC-d) configured to produce MAC-d flows for logical channels for transfer over an enhanced dedicated physical channel (E-DPCH);

an enhanced dedicated channel transport formal combination (E-TFC) selection device configured to receive a size of data associated with a serving grant, a size of data associated with non-scheduled grants, a size associated with medium access control header information for multiplexing onto a medium access control enhanced dedicated channel (MAC-e) packet data unit (PDU), the E-TFC selection device configured to select a E-TFC out of a plurality of supported E-TFCs and the E-TFC selection device is configured if a number of bits that are permitted to be transmitted exceeds a first sum of the received serving grant size, the determined scheduling grant size and MAC header information, to select a largest E-TFC from the plurality of supported E-TFCs; and

a multiplexing device configured to receive the selected E-TFC and the MAC-d flows and configured to multiplex data of the MAC-d flows into a medium access control enhanced dedicated channel packet data unit (MAC-e PDU) having a size corresponding to the selected E-TFC and the multiplexing device configured if the number of bits that are permitted to be transmitted exceeds a first sum of the received serving grant size, the determined scheduling grant size and MAC header information, to multiplex bits from the MAC-d flows and the MAC header information into the MAC-e PDU; and

a physical layer device configured to transmit the MAC-e PDUs on an enhanced dedicated physical channel E-DPCH.

11. The W-CDMA FDD UE of claim 10 wherein the E-TFC selection device is configured to receive a power offset and configured to determine a largest supported E-TFC based on the provided power offset and a maximum number of transmitted bits is limited to the largest supported E-TFC.

12. The W-CDMA FDD UE of claim 11 wherein the E-TFC selection device is configured such that if the number of bits that are permitted to be transmitted does not exceeds a first sum of the determined serving grant size, the determined scheduling grant size and MAC header information, the largest supported E-TFC is selected for multiplexing the MAC-d flows.

13. The W-CDMA FDD UE of claim 10 wherein the multiplexing device is configured to multiplex bits from the MAC-d flows and the MAC header information by in order of priority logical channel, multiplexing MAC-d flows from the non-scheduled grants.

14. The W-CDMA FDD UE of claim 10 wherein the multiplexing device is configured to in order of priority logical channel, multiplex MAC-d flows from the serving grants for transmission using the selected E-TFC.

15. The W-CDMA FDD UE of claim 14 wherein the multiplexing device is configured such that a number of bits permitted to be multiplexed for serving grants is derived by subtracting from the first sum a permitted number of bits for the non-scheduled grants and the MAC header information.

16. The W-CDMA FDD UE of claim 10 wherein the multiplexing device is configured such that if a number of bits of the multiplexed MAC-d flows and the MAC header information is less than the size of the selected E-TFC, padding is multiplexed onto the multiplexed MAC-d flows and the MAC header information so that the size of the selected E-TFC is met.

17. The W-CDMA FDD UE of claim 16 wherein a size of the padding is less than a size of a MAC-d flow.

18. A wideband code division multiple access (W-CDMA) frequency division duplex (FDD) communication system comprising:

a user equipment (UE) comprising;

a UE medium access control—

dedicated channel (MAC-d) configured to produce MAC-d flows for logical channels for transfer over an enhanced dedicated physical channel (E-DPCH);

an enhanced dedicated channel transport formal combination (E-TFC) selection device configured to receive a size of data associated with a serving grant, a size of data associated with non-scheduled grants, a size associated with medium access control header information for multiplexing onto a medium access control enhanced dedicated channel (MAC-e) packet data unit (PDU), the E-TFC selection device configured to select a E-TFC out of a plurality of supported E-TFCs and the E-TFC selection device is configured if a number of bits that are permitted to be transmitted exceeds a first sum of the received serving grant size, the determined scheduling grant size and MAC header information, to select a largest E-TFC from the plurality of supported E-TFCs; and

a multiplexing device configured to receive the selected E-TFC and the MAC-d flows and configured to multiplex data of the MAC-d flows into a medium access control enhanced dedicated channel packet data unit (MAC-e PDU) having a size corresponding to the selected E-TFC and the multiplexing device configured if the number of bits that are permitted to be transmitted exceeds a first sum of the received serving grant size, the determined scheduling grant size and MAC header information, to multiplex bits from the MAC-d flows and the MAC header information into the MAC-e PDU; and

a UE physical layer device configured to transmit the MAC-e PDUs on an enhanced dedicated physical channel E-DPCH; and

a base station comprising;

a base station physical layer configured to receive the E-DPCH and recover the MAC-e PDUs from the received E-DPCH;

a base station MAC-e/es device configured to receive the MAC-e PDUs and demultiplex the MAC-e PDUs into a plurality of medium access control dedicated channel (MAC-d) PDUs and the MAC-e/es device is configured to output the MAC-d PDUs as logical channels; and

a base station MAC-d device configured to receive the outputted logical channels.

19. The W-CDMA FDD communication system of claim 18 wherein the E-TFC selection device is configured to receive a power offset and configured to determine a largest supported E-TFC based on the provided power offset and a maximum number of transmitted bits is limited to the largest supported E-TFC.

20. The W-CDMA FDD communication system of claim 19 wherein the E-TFC selection device is configured such that if the number of bits that are permitted to be transmitted does not exceeds a first sum of the determined serving grant size, the determined scheduling grant size and MAC header information, the largest supported E-TFC is selected for multiplexing the MAC-d flows.

21. The W-CDMA FDD communication system of claim 18 wherein the multiplexing device is configured to multiplex bits from the MAC-d flows and the MAC header information by in order of priority logical channel, multiplexing MAC-d flows from the non-scheduled grants.

22. The W-CDMA FDD communication system of claim 18 wherein the multiplexing device is configured to in order of priority logical channel, multiplex MAC-d flows from the serving grants for transmission using the selected E-TFC.

23. The W-CDMA FDD communication system of claim 22 wherein the multiplexing device is configured such that a number of bits permitted to be multiplexed for serving grants is derived by subtracting from the first sum a permitted number of bits for the non-scheduled grants and the MAC header information.

24. The W-CDMA FDD communication system of claim 18 wherein the multiplexing device is configured such that if a number of bits of the multiplexed MAC-d flows and the MAC header information is less than the size of the selected E-TFC, padding is multiplexed onto the multiplexed MAC-d flows and the MAC header information so that the size of the selected E-TFC is met.

25. The W-CDMA FDD communication system of claim 24 wherein a size of the padding is less than a size of a MAC-d flow.