HK1124983A - Method and system for providing control information for supporting high speed downlink and uplink - Google Patents

Description

Method and system for providing control information to support high speed downlink and uplink

Technical Field

The present invention relates to wireless communication systems. In particular, the present invention relates to a method and system for providing control information to support high speed downlink and uplink.

Background

Release 5 and release 6 of the third generation partnership project (3GPP) provide HSDPA and HSUPA for high speed transmissions in the downlink and uplink, respectively. For HSDPA and HSUPA operation, the Node-B dynamically allocates radio resources to a plurality of User Equipments (UEs) and provides the UEs with several physical channels.

In HSDPA there are two downlink physical channels and one uplink physical channel. The downlink physical channels include a high speed shared control channel (HS-SCCH) and a high speed physical downlink shared channel (HS-PDSCH). The uplink physical channel includes a high speed dedicated physical control channel (HS-PDCCH).

The HS-SCCH carries downlink HSDPA control information. The downlink HSDPA control information includes a channelization code set, a modulation scheme, a transport block size, hybrid automatic repeat request (H-ARQ) process information, redundancy and cluster version, a new data indicator, and a UE Identification (ID). In one cell, up to four (4) HS-SCCHs are allocated to the UE by Radio Resource Control (RRC) signaling. The UE needs to monitor all the allocated HS-SCCHs before receiving the control information for HSDPA.

The HS-PDSCH carries downlink HSDPA data packets. Based on the HS-PDSCH processing (e.g., Cyclic Redundancy Check (CRC) and H-ARQ processing), the UE sends an Acknowledgement (ACK) or Negative Acknowledgement (NACK) to the Node-B via the HS-DPCCH. The HS-DPCCH also transmits a Channel Quality Indicator (CQI).

In HSUPA there are three downlink physical lanes and two uplink physical lanes. These downlink physical channels include an enhanced dedicated channel (E-DCH) absolute grant channel (E-AGCH), an E-DCH relative grant channel (E-RGCH), and an E-DCH H-ARQ indicator channel (E-HICH). The uplink physical channels include an E-DCH dedicated physical data channel (E-DPDCH) and an E-DCH dedicated physical control channel (E-DPCCH).

The E-AGCH conveys the uplink E-DCH absolute grant (i.e. the maximum power ratio between E-DPDCH and Dedicated Physical Control Channel (DPCCH)). The channelization codes for the E-AGCH are signaled separately to each UE. The E-RGCH conveys an uplink E-DCH relative grant. The E-HICH conveys an E-DCH H-ARQ acknowledgement indicator (i.e., ACK or NACK). The E-DPDCH transmits uplink HSUPA data packets. The E-DPCCH transmits Transport Format Combination Index (TFCI) information, Retransmission Sequence Number (RSN), and a coherence bit (happy bit).

Tables 1 and 2 below outline control information transmitted on the downlink of HSDPA and HSUPA, respectively, and tables 3 and 4 below outline control information transmitted on the uplink of HSDPA and HSUPA, respectively.

TABLE 1

TABLE 2

TABLE 3

TABLE 4

Disclosure of Invention

The present invention relates to a method and system for providing control information to support high speed data transmission. A Node-B allocates at least one downlink control channel and at least one uplink control channel for a wireless transmit/receive unit (WTRU). A downlink control channel and an uplink control channel are provided to convey control information for downlink and uplink data transmissions. The conventional control channels for HSDPA and HSUPA are combined into a reduced number of control channel groups for uplink and downlink. The Node-B and the WTRU communicate control information via the reduced set of downlink and uplink control channels. The WTRU receives downlink data and transmits uplink data, and the Node-B receives uplink data and transmits downlink data based on control information transmitted via the reduced set of downlink control channels and uplink control channels.

Drawings

FIG. 1 is a block diagram of a system configured in accordance with the present invention;

FIG. 2 is a flow diagram of an example method of transmission of control and data packets in accordance with one embodiment of the present invention;

fig. 3 is a flow diagram of an exemplary method of control and transmission of data packets according to another embodiment of the present invention.

Detailed Description

The term "WTRU" as referred to hereinafter includes, but is not limited to, a User Equipment (UE), a mobile station, a fixed or mobile subscriber unit, a pager, or any other type of device capable of operating in a wireless environment. The term "Node-B" as referred to hereinafter includes, but is not limited to, a base station, a Node-B, a site controller, an Access Point (AP), or any other type of interfacing device in a wireless environment.

Features of the present invention may be incorporated into an Integrated Circuit (IC), or be configured in a circuit comprising a multitude of interconnecting components.

In the current 3GPP specification, four downlink control channels and two uplink control channels are defined to support HSDPA and HSUPA operations. According to the present invention, the conventional two uplink control channels are combined into at least one uplink control channel, and the conventional four downlink control channels are combined into at least one downlink control channel. In addition to these control channels for the high speed uplink and downlink, information signaled on associated dedicated control channels, such as Transmit Power Control (TPC) on the uplink and downlink DPCCHs, may also be combined.

Fig. 1 is a block diagram of a wireless communication system 100 configured in accordance with the present invention. The system 100 includes a Node-B102 and a WTRU 104. An uplink control channel 112, a downlink control channel 114, a downlink data channel 116, and an uplink data channel 118 are established between the Node-B102 and the WTRU 104. The channels 112-118 are preferably allocated to the WTRU104 by the Node-B102 or a Radio Network Controller (RNC). The channels 112-118 may be defined by a combination of at least one of frequency, time, power, antenna, and coding. One antenna and power may be used for transmission to one user and a different set of antennas and power may be used for transmission to another user. Thus, multiple channels are simultaneously available on the same frequency and code using different antennas and powers. The Node-B102 may configure the WTRU104 to receive and transmit on more than one downlink and uplink control channels and more than one downlink and uplink data channels.

The WTRU104 listens to the downlink control channel 114 and obtains control information regarding the downlink data channel, the uplink control channel, and the uplink data channel. Once the WTRU104 is configured using the uplink control channel 112 and the downlink control channel 116, the WTRU104 may receive data or transmit control information and data information on the assigned downlink data channel 116, uplink control channel 112, and uplink data channel 118.

The control information may include scheduling information, packet decoding information, reception processing information, and feedback information. The packet decoder information, reception processing information, and feedback information must be transmitted at every Transmission Time Interval (TTI). The scheduling information may be transmitted every TTI or on an as-needed basis.

The packet coding information may include a modulation scheme, a coding rate, and a packet size. Information related to modulation scheme, coding rate and packet size may be combined into one parameter for over-the-air transmission.

The receive processing information may include an H-ARQ process ID, a new data indicator, a redundancy version, a packet sequence number, and state information of the transmitter. The H-ARQ process ID is only needed for asynchronous H-ARQ and is not necessary for H-ARQ. Redundancy versions may also be used to indicate new data. The packet sequence number indicates the packet sequence number within the H-ARQ process at the transmitter. The packet sequence number is a very useful parameter for soft or hard combinations of retransmissions and previous failed transmissions. Status information may be used for H-ARQ assisted ARQ operations, where the information may be reported with H-ARQ feedback information indicating the status of ongoing transmissions.

The feedback information may include H-ARQ ACK/NACK, CQI of a control channel, CQI of a data channel, packet sequence number, H-ARQ process ID, status information of a receiver, transmit diversity information (phase and amplitude information to support transmit diversity), and power control information.

The scheduling information may be a scheduling request or a scheduling response. The scheduling response is sent from the Node-B102 to the WTRU104 and the scheduling request is sent from the WTRU104 to the Node-B102. The scheduling response may include at least one of: resource allocation for the secondary downlink control channel (if applicable), resource allocation for the downlink data channel 116, resource allocation for the uplink control channel 112, resource allocation for the uplink data channel 118, and uplink timing adjustment (if necessary). The secondary downlink control channel is a control channel dedicated to WTRUs 104 for point-to-point services, which may be dedicated to a number of WTRUs in the case of point-to-multipoint services. The WTRU104 listens to and decodes channels following a resource allocation indicating a secondary control channel. The WTRU104 needs to perform frame alignment timing for correct transmission in the uplink timeslot. Since the clock of the WTRU104 is time-biased and propagation delays may change due to mobility, the WTRU104 needs to adjust the clock of the WTRU104 based on feedback from the Node-B102. This information is signaled when the Node-B102 detects a reception outside the specified range.

In the conventional 3GPP standard, for HSDPA, radio resources are allocated every TTI, whereas for HSUPA, radio resources are allocated indefinitely. Adding the duration field may provide flexibility in allocating radio resources, whereby each resource allocation comprises physical resource allocation information and a duration indicating a period during which the physical resource allocation is valid. The duration may be certain TTIs that are continuously allocated to the WTRU104 or may be a periodic resource allocation at a certain time. For example, the duration field may be represented by "n" TTIs, where the value of "n" is from 1 to infinity. The value "1" indicates that a resource is allocated in one TTI, and the value "infinity" indicates an infinite allocation of the resource. When the resources are allocated in an unlimited period, the WTRU104 is explicitly informed about the release of the resources.

The scheduling response may be sent separately on the downlink control channel 114. Alternatively, the scheduling response may be multiplexed with at least one of packet decoding information, reception processing information, and feedback information in the signal packet. The scheduling response may also be piggybacked by a data packet and sent on the downlink data channel 116.

Alternatively, the WTRU104 may be allocated two separate downlink control channels (i.e., a primary downlink control channel and a secondary downlink control channel), where the scheduling response may be transmitted via the primary downlink control channel and other control information (i.e., packet decoding information, reception processing information, timing adjustment, and feedback information) may be transmitted via the secondary downlink control channel. It is preferable to share the primary downlink control channel with multiple WTRUs and dedicate the secondary downlink control channel to a single WTRU for point-to-point services or to a group of WTRUs for point-to-multipoint services. The primary downlink control channel is a common control channel that all WTRUs monitor. The secondary control channel is a dedicated control channel that only one or some WTRUs addressed on this particular primary control channel listen to.

The scheduling request may contain all or some of the following information, such as the buffer occupancy for each service type or data flow, the associated quality of service (QoS) requirements, the queuing time of the first packet for each service, and the WTRU power headroom (i.e., the power available for the requested uplink resource channel). The scheduling request may be sent on the uplink control channel 112 alone, piggybacked with other control information on the uplink control channel 112, piggybacked with uplink data on the uplink data channel 118, sent on the uplink data channel 118 by a separate packet, or sent by a Random Access Channel (RACH) (not shown in fig. 1). Preferably, in an active transmission (i.e., the presence of the uplink control channel 112), the scheduling request is sent on the uplink control channel 112 piggybacked with other control information. If there is no uplink control channel 112, then it is preferable to send the scheduling request on the RACH.

To communicate control information on the uplink control channel 112 and the downlink control channel 114, the control information may be split into two portions, as not all of the control information must be transmitted over any given TTI. The control information may include a specific bit indicating whether the control channel includes only downlink control information or only uplink control information and indicating whether the control channel includes feedback information or other control information. The specific bit may also indicate whether the control channel contains broadcast information, multimedia broadcast/multicast service (MBMS), persistent scheduling information for periodic services, paging information, or control information for a group of WTRUs.

The uplink control information from the Node-B102 to the WTRU104 may include transmission feedback information. The downlink control information from the WTRU104 to the Node-B102 includes only feedback information. Uplink control information from the WTRU104 to the Node-B102 includes packet decoding information, reception processing information, and scheduling requests (if needed). The downlink control information from the Node-B to the WTRU104 includes decoding information, receive processing information, and scheduling response (if needed).

In a preferred embodiment, a single packet may be used to contain all of the control information. Alternatively, multiple packets may be used. A single packet contains all the downlink control information needed for the downlink and uplink as well as the uplink control information. The control packet includes decoding information, reception processing information, feedback information, and scheduling information (i.e., scheduling request or scheduling response). Some indication may also be included in the control packet to indicate a valid information element.

The downlink control channel 114 and the uplink control channel 112 may be shared channels for all WTRUs or dedicated channels allocated to a single WTRU or group of WTRUs. Since collisions may occur between multiple WTRUs, it is preferable that the uplink control channel 112 not be a shared channel.

The uplink control channel 112 may be allocated to the WTRU104 only during active uplink and/or downlink data transfers (i.e., on-demand allocation). Alternatively, the uplink control channel 112 may be allocated to the WTRU104 even in the dormant state. Four alternatives for downlink and uplink control channel configurations are summarized in table 5. Of which methods 3 and 4 are preferred alternatives.

TABLE 5

	Downlink control channel	Uplink control channel
			Method 1	Specially adapted for	Is dedicated in both standby and active states
Method 2	Specially adapted for	Is dedicated only in active state
			Method 3	Sharing	In standby mode andall being dedicated in active state
Method 4	Sharing	Is dedicated only in active state

An example system operation with a single downlink control channel and with resource allocation on a per TTI basis will be described below with reference to fig. 2. Fig. 2 is a flow diagram of an example method 200 of control and transmission of data packets in accordance with one embodiment of the present invention. The WTRU listens to the downlink control channel 114 (step 202). Once the WTRU104 acquires control information from the Node-B102 on the downlink control channel 114 and for the WTRU104, the WTRU104 acquires scheduling information (e.g., resource allocation for downlink data channel, uplink control channel, and uplink data channel) and packet decoding and reception processing information (e.g., coding rate, modulation scheme, packet size, H-ARQ process ID, redundancy version, etc.). The control packet may also include feedback information (i.e., H-ARQ ACK/NACK and CQI for the previous uplink data packet). The WTRU104 receives the scheduling information and configures the downlink data channel 116, the uplink control channel 112, and the uplink data channel 118 (step 204).

The Node-B102 transmits the downlink data packet to the WTRU104 via the downlink data channel 116 (step 206). The WTRU104 receives downlink data packets on the downlink data channel 116 and decodes and processes the data packets based on packet decoding and reception processing information received in control packets via the downlink control channel 114 (step 208).

The WTRU104 responds to the downlink data packet with a control packet containing feedback information (i.e., ACK/NACK) (step 210). The WTRU104 may also send a scheduling request for uplink transmission and packet decoding and reception processing information (i.e., coding rate, modulation scheme, packet size, H-ARQ process ID, redundancy version, etc.), if needed, and may then send an uplink data packet (steps 210, 212). The Node-B102 receives and processes the uplink data packet from the WTRU104 using the control information in the control packet received via the uplink control channel (step 214).

Example system operations utilizing primary and secondary downlink control channels and duration-based resource allocation will be described below with reference to fig. 3. Fig. 3 is a flow diagram of an exemplary method 300 of control and transmission of data packets according to another embodiment of the present invention. Two downlink control channels (i.e., a primary downlink control channel and a secondary downlink control channel) are provided. Each WTRU104 knows and monitors the primary control channel (also referred to as the common control channel). Each WTRU104 receives control information from and for the Node-B102 on a primary channel, and the Node-B102 sends scheduling information on a primary downlink control channel (step 302). The scheduling information includes resource allocations for a secondary downlink control channel, a downlink data channel, an uplink control channel, and an uplink data channel. The secondary downlink control channel is a dedicated control channel for the WTRU 104. Upon receiving the scheduling information, the WTRU104 configures a secondary downlink control channel, a downlink data channel, an uplink control channel, and an uplink data channel (step 304).

The Node-B102 sends control information (i.e., packet related information such as coding rate, modulation scheme, packet size, H-ARQ process ID, redundancy version, etc.) on a secondary downlink control channel (step 306). The Node-B102 may send feedback information (i.e., ACK/NACK and CQI for the previous uplink data packet) on the secondary downlink control channel. The Node-B102 then sends the data packet to the WTRU104 via a downlink data channel (step 308). The WTRU104 decodes and processes the data packet based on the control information received on the secondary downlink control channel (step 310). The WTRU104 sends a control packet containing feedback information (i.e., ACK/NACK) to the data packet via the uplink control channel (step 312). The WTRU104 may send a scheduling request for uplink transmission and packet related information along with feedback via an uplink control channel, if needed. The WTRU104 may then send an uplink data packet via an uplink data channel (step 314). The Node-B102 receives, decodes and processes the uplink data packet based on the control information received via the uplink control channel (step 316). If the primary control channel allocates secondary control and data transport channels for a particular duration, the WTRU104 receives the allocated channels continuously (i.e., at each TTI) or periodically (i.e., according to a reception pattern over multiple TTIs) for the allocated duration.

H-ARQ control packets for efficient H-ARQ processing may be sent as needed. If the subsequent packet (e.g., the header of the subsequent data packet) contains H-ARQ information (e.g., H-ARQ process ID, new data indicator, and redundancy version), then it is not necessary to send scheduling information on every TTI. The downlink control packet for the scheduling information is transmitted only when the resource allocation, the scheduling scheme, or the packet size is changed.

The control information may be piggybacked on a data packet. Control information (e.g., ACK/NACK, CQI, scheduling response, or scheduling request) may be piggybacked with data in a data packet. This is useful when both uplink and downlink H-ARQ processes are active. The downlink data packet may piggyback ACK/NACK, CQI, and scheduling response. The uplink data packet may then piggyback ACK/NACK, CQI, and scheduling request.

Alternatively, two uplink control channels (i.e., a primary uplink control channel and a secondary uplink control channel) may be provided. The primary uplink control channel is used to send resource requests, while the secondary control channel is used to send packet decoding and receive processing information as well as feedback information.

The downlink resource allocation may imply an uplink resource allocation. For example, for HSDPA, when the WTRU104 is allocated resources in the downlink, this implicitly indicates that certain resources are allocated in the uplink for data and/or control transmissions (e.g., ACK/NACK, small data packets, and scheduling requests for uplink transmissions). The uplink data channel and the uplink control channel may have a fixed offset in time or frequency from the downlink data channel or the downlink control channel, and the WTRU104 may configure the uplink channel based on this fixed offset.

The Node-B102 may decide the transmit power, packet size, modulation scheme, coding rate, and H-ARQ process to use for uplink transmission. In this case, control information for the uplink data packet is sent from the Node-B102 to the WTRU104 via a downlink control channel.

The WTRU104 is required to monitor the downlink control channel. In the case of a Time Division Multiplexing (TDM) system, the WTRU104 may enter a sleep state in a time slot not allocated to the WTRU104 and may wake up to listen to the control channel in the allocated time slot.

Examples

1. A method of providing control information to support high speed downlink and uplink in a wireless communication system including a WTRU and a Node-B.

2. The method according to embodiment 1, comprising the steps of: the Node-B allocates at least one downlink control channel to the WTRU to transmit downlink control information for downlink and uplink transmissions.

3. The method according to any of embodiments 1-2, comprising the steps of: the Node-B allocates at least one uplink control channel to the WTRU to transmit uplink control information for downlink and uplink transmissions.

4. The method according to embodiment 3, comprising the steps of: the Node-B and the WTRU communicate downlink and uplink control information via a downlink control channel and an uplink control channel, respectively.

5. The method of embodiment 4, comprising the steps of: the WTRU receives downlink data based on the downlink control information.

6. The method of any of embodiments 4-5, comprising: the WTRU transmits uplink data based on the uplink control information.

7. The method of any of embodiments 4-6, comprising: the Node-B receives uplink data based on the uplink control information.

8. The method of any of embodiments 4-7, comprising: the Node-B transmits downlink data based on the downlink control information.

9. The method as in any one of embodiments 4-8, wherein the downlink control information and the uplink control information comprise at least one of packet decoding information, reception processing information, and feedback information.

10. The method as in any one of embodiments 4-9, wherein the downlink control information and the uplink control information comprise scheduling information.

11. The method of embodiment 10 wherein the scheduling information comprises scheduling request information and scheduling response information.

12. The method as in any one of embodiments 10-11, wherein the scheduling information is multiplexed with at least one of packet decoding information, reception processing information, and feedback information.

13. The method as in any one of embodiments 2-12, wherein the downlink control channel comprises a primary downlink control channel and a secondary downlink control channel.

14. The method of embodiment 13 wherein the primary downlink control channel is a shared control channel for all WTRUs and the secondary downlink control channel is a dedicated control channel for at least one WTRU.

15. The method as in any embodiments 13-14, wherein the scheduling information is transmitted via a primary downlink control channel and the packet decoding information, the receive processing information, and the feedback information are transmitted via a secondary downlink control channel.

16. The method as in any one of embodiments 9-15, wherein at least one of packet decoding information, reception processing information, feedback information, and scheduling information is piggybacked onto a data packet.

17. The method as in any one of embodiments 10-16, wherein the scheduling information is provided every TTI.

18. The method as in any one of embodiments 10-17, wherein the scheduling information is provided on-demand.

19. The method as in any one of embodiments 10-18, wherein the scheduling information comprises a resource allocation and a duration indicating a period during which the resource allocation is valid.

20. The method as in any embodiments 10-19 wherein the scheduling information sent by the Node-B to the WTRU comprises at least one of: resource allocation for a downlink data channel, resource allocation for an uplink control channel, and timing adjustment information.

21. The method of embodiment 20 wherein the timing adjustment information is transmitted via a separate packet.

22. The method as in any embodiments 9-21, wherein the packet coding information comprises at least one of a modulation scheme, a coding rate, and a packet size.

23. The method as in any one of embodiments 9-22 wherein the received processing information comprises at least one of an H-ARQ process identification, a new data indication, a redundancy version, a packet sequence number, and status information.

24. The method as in any one of embodiments 9-23, wherein the feedback information comprises at least one of: ACK/NACK indication, CQI, packet sequence number, H-ARQ process identification, status information, transmit diversity information, and power control information.

25. The method as in any one of embodiments 3-24, wherein the downlink control information and the uplink control information are sent separately on separate control channels.

26. The method as in any one of embodiments 3-24, wherein the downlink control information and the uplink control information are sent simultaneously via a single control channel.

27. The method as in any one of embodiments 3-26 wherein a downlink control channel is allocated to a WTRU only when there is an active data transmission for the downlink and an uplink control channel is allocated to a WTRU only when there is an active data transmission for the uplink.

28. The method as in any one of embodiments 3-26 wherein a downlink control channel is allocated to a WTRU even if there is no active data transmission for the downlink and an uplink control channel is allocated to the WTRU even if there is no active data transmission for the uplink.

29. The method as in any one of embodiments 3-28 wherein at least one of the downlink control channel and the uplink control channel is a shared channel.

30. The method as in any one of embodiments 3-28 wherein at least one of the downlink control channel and the uplink control channel is a dedicated channel.

31. A method as in any of embodiments 11-30 wherein scheduling response information sent by the Node-B comprises resource allocations for uplink transmissions.

32. The method as in any embodiments 1-31 wherein the wireless communication system is a TDD system.

33. The method of embodiment 32 wherein the WTRU goes to sleep in a time slot not allocated to the WTRU.

34. The method as in any embodiments 10-33 wherein the scheduling information sent by the Node-B to the WTRU includes a downlink resource allocation and the uplink resource allocation is implicitly derived from the downlink resource allocation.

35. The method as in any embodiments 3-34, wherein the uplink control channel comprises a primary uplink control channel and a secondary uplink control channel.

36. The method as in embodiment 35, wherein the scheduling information is transmitted via a primary uplink control channel and the packet decoding information, the reception processing information, and the feedback information are transmitted via a secondary uplink control channel.

37. The method as in any one of embodiments 2-36, wherein the downlink control channel includes an indication bit identifying a type of the control information.

38. The method of embodiment 37 wherein the indication bits identify that the downlink control channel contains only downlink control information.

39. The method of embodiment 37 wherein the indicator bits identify that the downlink control channel contains only uplink control information.

40. The method of embodiment 37 wherein the indicator bits identify that the downlink control channel contains broadcast information.

41. The method of embodiment 37 wherein the indication bits identify that the downlink control channel contains MBMS control information.

42. The method of embodiment 37 wherein the indication bits identify that the control channel contains persistent scheduling information.

43. The method of embodiment 37 wherein the indication bits identify that the control channel contains paging information.

44. A wireless communication system provides control information to support a high speed downlink and a high speed uplink.

45. The system of embodiment 44, comprising: a Node-B configured to allocate at least one downlink control channel to a WTRU.

46. The system according to embodiment 45, wherein a downlink control channel is provided to transmit downlink control information for downlink and uplink.

47. The system as in any embodiments 44-46 wherein the Node-B allocates at least one uplink control channel for the WTRU.

48. The system of embodiment 47, wherein an uplink is provided to transmit uplink control information for the downlink and the uplink.

49. The system as in any embodiments 47-48 wherein the Node-B sends downlink control information to the WTRU via a downlink control channel and performs at least one of receiving uplink data and transmitting downlink data based on the uplink control information and the downlink control information, respectively.

50. The system as in any embodiments 47-49 wherein the WTRU is configured to: the method includes transmitting uplink control information to the Node-B via an uplink control channel, and performing at least one of receiving downlink data and transmitting uplink data based on the downlink control information and the uplink control information, respectively.

51. The system as in any one of embodiments 46-50, wherein the control information comprises at least one of packet decoding information, reception processing information, and feedback information.

52. The system as in any one of embodiments 46-51, wherein the control information comprises scheduling information.

53. The system of embodiment 52 wherein the scheduling information comprises scheduling request information and scheduling response information.

54. The system as in any one of embodiments 52-53 wherein the scheduling information is multiplexed with at least one of packet decoding information, receive processing information, and feedback information.

55. The system as in any one of embodiments 45-54 wherein the downlink control channels comprise a primary downlink control channel and a secondary downlink control channel.

56. The system as in any one of embodiments 55 wherein the primary downlink control channel is a shared control channel for all WTRUs and the secondary downlink control channel is a dedicated control channel for at least one WTRU.

57. The system as in any embodiments 55-56 wherein the scheduling information is transmitted via a primary downlink control channel and the packet decoding information, the receive processing information, and the feedback information are transmitted via a secondary downlink control channel.

58. The system as in any one of embodiments 51-57 wherein at least one of packet decoding information, reception processing information, feedback information, and scheduling information is piggybacked onto a data packet.

59. The system as in any embodiments 52-58, wherein the scheduling information is provided every TTI.

60. The system as in any one of embodiments 52-58, wherein the scheduling information is provided on-demand.

61. The system as in any embodiments 52-60, wherein the scheduling information comprises a resource allocation and a duration indicating a period during which the resource allocation is valid.

62. The system as in any embodiments 53-61 wherein the scheduling response message sent by the Node-B to the WTRU comprises at least one of: resource allocation for a downlink data channel, resource allocation for an uplink control channel, and timing adjustment information.

63. The system of embodiment 62, wherein the timing adjustment information is transmitted via a separate packet.

64. The system as in any embodiments 51-63 wherein the packet coding information comprises at least one of a modulation scheme, a coding rate, and a packet size.

65. The system as in any one of embodiments 51-64 wherein the received process information comprises at least one of an H-ARQ process identification, a new data indication, a redundancy version, a packet sequence number, and status information.

66. The system as in any one of embodiments 51-65, wherein the feedback information comprises at least one of: ACK/NACK indication, CQI, packet sequence number, H-ARQ process identification, status information, transmit diversity information, and power control information.

67. The system as in any one of embodiments 47-66, wherein the downlink control information and the uplink control information are sent separately on separate control channels.

68. The system as in any one of embodiments 47-66, wherein the downlink control information and the uplink control information are sent simultaneously via a single control channel.

69. The system as in any one of embodiments 47-68 wherein a downlink control channel is allocated to a WTRU only when there is an active data transmission for the downlink and an uplink control channel is allocated to a WTRU only when there is an active data transmission for the uplink.

70. The system as in any one of embodiments 47-68 wherein a downlink control channel is allocated to a WTRU even if there is no active data transmission for the downlink and an uplink control channel is allocated to a WTRU even if there is no active data transmission for the uplink.

71. The system as in any one of embodiments 47-70 wherein at least one of the downlink control channel and the uplink control channel is a shared channel.

72. The system as in any one of embodiments 47-70 wherein at least one of the downlink control channel and the uplink control channel is a dedicated channel.

73. The system as in any one of embodiments 53-72 wherein the scheduling response information sent by the Node-B comprises resource allocations for uplink transmissions.

74. The system as in any one of embodiments 44-73 wherein the wireless communication system is a TDD system.

75. The system of embodiment 74 wherein the WTRU goes to sleep in a time slot not allocated to the WTRU.

76. A system as in any of embodiments 52-75 wherein scheduling information sent by the Node-B to the WTRU includes a downlink resource allocation and the uplink resource allocation is implicitly derived from the downlink resource allocation.

77. The system as in any one of embodiments 47-76, wherein the uplink control channel comprises a primary uplink control channel and a secondary uplink control channel.

78. The system of embodiment 77, wherein the scheduling information is transmitted via a primary uplink control channel and the packet decoding information, the reception processing information, and the feedback information are transmitted via a secondary uplink control channel.

79. The system as in any one of embodiments 45-78 wherein the downlink control channel has indicator bits to identify the type of control information.

80. The system of embodiment 79, wherein the indicator bits identify that the downlink control channel contains only downlink control information.

81. The system of embodiment 79, wherein the indicator bits identify that the downlink control channel contains only uplink control information.

82. The system of embodiment 79 wherein the indicator bits identify that the downlink control channel contains broadcast information.

83. The system of embodiment 79 wherein the indicator bits identify that the downlink control channel contains multimedia broadcast/multicast service (MBMS) control information.

84. The system of embodiment 79 wherein the indicator bits identify that the control channel contains persistent scheduling information.

85. The system of embodiment 79 wherein the indicator bits identify that the control channel contains paging information.

Although the features and elements of the present invention are described in the preferred embodiments in particular combinations, each feature or element can be used alone without the other features and elements of the preferred embodiments or in various combinations with or without other features and elements of the present invention.

Claims (72)

1. A method of providing control information to support high speed downlink and uplink in a wireless communication system including a wireless transmit/receive unit (WTRU) and a Node-B, the method comprising:

a Node-B allocating at least one downlink control channel to the WTRU for transmitting downlink control information for downlink and uplink transmissions;

a Node-B allocating at least one uplink control channel to the WTRU for transmitting uplink control information for downlink and uplink transmissions;

the Node-B and the WTRU communicate downlink and uplink control information via a downlink control channel and an uplink control channel, respectively; and

the WTRU performs at least one of receiving downlink data and transmitting uplink data based on the downlink control information and the uplink control information, respectively, and the Node-B performs at least one of receiving uplink data and transmitting downlink data based on the uplink control information and the downlink control information, respectively.

2. The method of claim 1, wherein the downlink control information and the uplink control information comprise at least one of packet decoding information, reception processing information, and feedback information.

3. The method of claim 2, wherein the downlink control information and the uplink control information further comprise scheduling information.

4. The method of claim 3, wherein the scheduling information comprises scheduling request information and scheduling response information.

5. The method of claim 3, wherein the scheduling information is multiplexed with at least one of packet decoding information, reception processing information, and feedback information.

6. The method of claim 3, wherein the downlink control channel comprises a primary downlink control channel and a secondary downlink control channel.

7. The method of claim 6 wherein the primary downlink control channel is a shared control channel for all WTRUs and the secondary downlink control channel is a dedicated control channel for at least one WTRU.

8. The method of claim 6 wherein the scheduling information is transmitted via a primary downlink control channel and the packet decoding information, the receive processing information, and the feedback information are transmitted via a secondary downlink control channel.

9. The method of claim 3, wherein at least one of packet decoding information, reception processing information, feedback information, and scheduling information is piggybacked onto a data packet.

10. The method of claim 3, wherein scheduling information is provided at each Transmission Time Interval (TTI).

11. The method of claim 3, wherein the scheduling information is provided on-demand.

12. The method of claim 3, wherein the scheduling information comprises resource allocation and a duration indicating a period during which the resource allocation is valid.

13. The method of claim 4 wherein the scheduling information sent by the Node-B to the WTRU includes at least one of: resource allocation for a downlink data channel, resource allocation for an uplink control channel, and timing adjustment information.

14. The method of claim 13, wherein the timing adjustment information is transmitted via a separate packet.

15. The method of claim 2, wherein the packet decoding information comprises at least one of a modulation scheme, a coding rate, and a packet size.

16. The method of claim 2, wherein receiving processing information comprises at least one of hybrid automatic repeat request (H-ARQ) process identification, new data indication, redundancy version, packet sequence number, and status information.

17. The method of claim 2, wherein feedback information comprises at least one of: positive Acknowledgement (ACK)/Negative Acknowledgement (NACK) indication, Channel Quality Indicator (CQI), packet sequence number, hybrid automatic repeat request (H-ARQ) process identification, status information, transmit diversity information, and power control information.

18. The method of claim 1, wherein the downlink control information and the uplink control information are separately transmitted on separate control channels.

19. The method of claim 1, wherein the downlink control information and the uplink control information are sent simultaneously via a single control channel.

20. The method of claim 1 wherein a downlink control channel is allocated to the WTRU only when there is an active data transmission for the downlink and an uplink control channel is allocated to the WTRU only when there is an active data transmission for the uplink.

21. The method of claim 1 wherein a downlink control channel is allocated to the WTRU even if there is no active data transmission for the downlink and an uplink control channel is allocated to the WTRU even if there is no active data transmission for the uplink.

22. The method of claim 1, wherein at least one of the downlink control channel and the uplink control channel is a shared channel.

23. The method of claim 1, wherein at least one of the downlink control channel and the uplink control channel is a dedicated channel.

24. The method of claim 4 wherein the scheduling response information sent by the Node-B includes resource allocation for uplink transmission.

25. The method of claim 1, wherein the wireless communication system is a Time Division Duplex (TDD) system.

26. The method of claim 25 wherein the WTRU goes to sleep in a time slot not allocated to the WTRU.

27. The method of claim 3 wherein the scheduling information sent by the Node-B to the WTRU includes downlink resource allocation and the uplink resource allocation is implicitly derived from the downlink resource allocation.

28. The method of claim 3, wherein the uplink control channel comprises a primary uplink control channel and a secondary uplink control channel.

29. The method of claim 28 wherein the scheduling information is transmitted via a primary uplink control channel and the packet decoding information, the receive processing information, and the feedback information are transmitted via a secondary uplink control channel.

30. The method of claim 1, wherein the downlink control channel comprises indication bits for identifying the type of control information.

31. The method of claim 30 wherein the indication bits identify that the downlink control channel contains only downlink control information.

32. The method of claim 30 wherein the indication bits identify that the downlink control channel contains only uplink control information.

33. The method of claim 30 wherein the indication bits identify that the downlink control channel contains broadcast information.

34. The method of claim 30 wherein the indication bits identify that the downlink control channel contains multimedia broadcast/multicast service (MBMS) control information.

35. The method of claim 30 wherein the indication bit identifies that the control channel contains persistent scheduling information.

36. The method of claim 30 wherein the indication bits identify that the control channel contains paging information.

37. A wireless communication system that provides control information to support a high speed downlink and a high speed uplink, the system comprising:

Node-B configured to: allocating at least one downlink control channel and at least one uplink control channel to a wireless transmit/receive unit (WTRU), wherein the downlink control channel is provided to transmit downlink control information for downlink and uplink, the uplink control channel is provided to transmit uplink control information for downlink and uplink, the downlink control information is sent to the WTRU via the downlink control channel, and at least one of receiving uplink data and transmitting downlink data is performed based on the uplink control information and the downlink control information, respectively; and

the WTRU configured to: the method includes transmitting uplink control information to the Node-B via an uplink control channel, and performing at least one of receiving downlink data and transmitting uplink data based on the downlink control information and the uplink control information, respectively.

38. The system of claim 37, wherein the control information comprises at least one of packet decoding information, reception processing information, and feedback information.

39. The system of claim 38, wherein the control information comprises scheduling information.

40. The system of claim 39, wherein the scheduling information comprises scheduling request information and scheduling response information.

41. The system of claim 39, wherein the scheduling information is multiplexed with at least one of packet decoding information, reception processing information, and feedback information.

42. The system of claim 39, wherein the downlink control channels comprise a primary downlink control channel and a secondary downlink control channel.

43. The system of claim 42 wherein the primary downlink control channel is a shared control channel for all WTRUs and the secondary downlink control channel is a dedicated control channel for at least one WTRU.

44. The system of claim 43 wherein the scheduling information is transmitted via a primary downlink control channel and the packet decoding information, the receive processing information, and the feedback information are transmitted via a secondary downlink control channel.

45. The system of claim 39, wherein at least one of packet decoding information, reception processing information, feedback information, and scheduling information is piggybacked onto a data packet.

46. The system of claim 39, wherein scheduling information is provided at each Transmission Time Interval (TTI).

47. The system of claim 39, wherein the scheduling information is provided on-demand.

48. The system of claim 39, wherein the scheduling information includes resource allocation and a duration indicating a period during which the resource allocation is valid.

49. The system of claim 39 wherein the scheduling response information sent by the Node-B to the WTRU includes at least one of: resource allocation for a downlink data channel, resource allocation for an uplink control channel, and timing adjustment information.

50. The system of claim 49, wherein the timing adjustment information is transmitted via a separate packet.

51. The system of claim 37, wherein the packet decoding information comprises at least one of a modulation scheme, a coding rate, and a packet size.

52. The system of claim 37 wherein the received processing information includes at least one of hybrid automatic repeat request (H-ARQ) process identification, new data indication, redundancy version, packet sequence number, and status information.

53. The system of claim 37, wherein feedback information comprises at least one of: positive Acknowledgement (ACK)/Negative Acknowledgement (NACK) indication, Channel Quality Indicator (CQI), packet sequence number, hybrid automatic repeat request (H-ARQ) process identification, status information, transmit diversity information, and power control information.

54. The system of claim 37, wherein the downlink control information and the uplink control information are separately transmitted on separate control channels.

55. The system of claim 37, wherein the downlink control information and the uplink control information are sent simultaneously via a single control channel.

56. The system of claim 37 wherein a downlink control channel is allocated to a WTRU only when there is a valid data transmission for the downlink and an uplink control channel is allocated to a WTRU only when there is a valid data transmission for the uplink.

57. The system of claim 37 wherein a downlink control channel is allocated to the WTRU even if there is no active data transmission for the downlink and an uplink control channel is allocated to the WTRU even if there is no active data transmission for the uplink.

58. The system of claim 37, wherein at least one of the downlink control channel and the uplink control channel is a shared channel.

59. The system of claim 37, wherein at least one of the downlink control channel and the uplink control channel is a dedicated channel.

60. The system of claim 39 wherein the scheduling response information sent by the Node-B includes resource allocation for uplink transmission.

61. The system of claim 37, wherein the wireless communication system is a Time Division Duplex (TDD) system.

62. The system of claim 61 wherein the WTRU goes to sleep in a time slot not allocated to the WTRU.

63. The system of claim 39 wherein the scheduling information sent by the Node-B to the WTRU includes a downlink resource allocation and the uplink resource allocation is implicitly derived from the downlink resource allocation.

64. The system according to claim 39, wherein the uplink control channel comprises a primary uplink control channel and a secondary uplink control channel.

65. The system of claim 64 wherein the scheduling information is transmitted via a primary uplink control channel and the packet decoding information, the receive processing information, and the feedback information are transmitted via a secondary uplink control channel.

66. The system of claim 37, wherein the downlink control channel has indicator bits for identifying the type of control information.

67. The system of claim 66, wherein the indication bits identify that the downlink control channel only contains downlink control information.

68. The system of claim 66, wherein the indication bits identify that the downlink control channel only contains uplink control information.

69. The system of claim 66, wherein the indication bits identify that the downlink control channel contains broadcast information.

70. The system of claim 66, wherein the indication bits identify that the downlink control channel contains multimedia broadcast/multicast service (MBMS) control information.

71. The system of claim 66, wherein the indication bit identifies that the control channel contains persistent scheduling information.

72. The system of claim 66, wherein the indication bit identifies that the control channel contains paging information.