WO2009132290A2 - Method and apparatus for simultaneously receiving on two carriers and performing discontinuous transmission and reception in dual cell high speed downlink packet access - Google Patents

Method and apparatus for simultaneously receiving on two carriers and performing discontinuous transmission and reception in dual cell high speed downlink packet access Download PDF

Info

Publication number
WO2009132290A2
WO2009132290A2 PCT/US2009/041691 US2009041691W WO2009132290A2 WO 2009132290 A2 WO2009132290 A2 WO 2009132290A2 US 2009041691 W US2009041691 W US 2009041691W WO 2009132290 A2 WO2009132290 A2 WO 2009132290A2
Authority
WO
WIPO (PCT)
Prior art keywords
carrier
supplementary
wtru
drx
supplementary carrier
Prior art date
Application number
PCT/US2009/041691
Other languages
French (fr)
Other versions
WO2009132290A3 (en
WO2009132290A8 (en
Inventor
Christopher R. Cave
Paul Marinier
Original Assignee
Interdigital Patent Holdings, Inc.
Pelletier, Benoit
Pani, Diana
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Interdigital Patent Holdings, Inc., Pelletier, Benoit, Pani, Diana filed Critical Interdigital Patent Holdings, Inc.
Priority to KR1020147011050A priority Critical patent/KR101554444B1/en
Priority to CA2722488A priority patent/CA2722488C/en
Priority to CN200980114683.0A priority patent/CN102017727B/en
Priority to JP2011506484A priority patent/JP5291186B2/en
Priority to EP09735925.1A priority patent/EP2292053B1/en
Publication of WO2009132290A2 publication Critical patent/WO2009132290A2/en
Publication of WO2009132290A3 publication Critical patent/WO2009132290A3/en
Publication of WO2009132290A8 publication Critical patent/WO2009132290A8/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1835—Buffer management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1874—Buffer management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0096—Indication of changes in allocation
    • H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • This application is related to wireless communications.
  • CPC Continuous Packet Connectivity
  • DTX discontinuous transmission
  • DRX discontinuous reception
  • WTRU wireless transmit/receive unit
  • Uplink DTX is a mechanism that defines how the WTRU will discontinuously transmit the dedicated physical control channel (DPCCH).
  • the uplink DTX is configured by a radio network controller (RNC).
  • RNC radio network controller
  • the uplink DPCCH burst pattern and the uplink DPCCH preamble and postamble together define the discontinuous uplink DPCCH operation.
  • Uplink DTX is dependent on enhanced dedicated channel (E-DCH) and high speed dedicated physical control channel (HS-DPCCH) activity. Uplink DTX may be configured without configuring downlink DRX.
  • E-DCH enhanced dedicated channel
  • HS-DPCCH high speed dedicated physical control channel
  • Figure 1 shows a DPCCH burst pattern for the uplink.
  • Two DTX patterns (UE_DTX_cycle_l and UE_DTX_cycle_2) are defined for a WTRU for discontinuous uplink DPCCH operation. Either UE_DTX_cycle_l or UE_DTX_cycle_2 is applied dependent on the duration of E-DCH inactivity. UE_DTX_cycle_2 is used when there is no E-DCH transmission for a predetermined number of subframes. Accordingly, the DPCCH transmission rate is autonomously adapted to data transmission activity.
  • the uplink DPCCH may be configured to transmit more frequently, while during lower data transmission activity the DPCCH may be configured to transmit less often to produce a DTX gain.
  • the DPCCH burst patterns for different WTRUs serviced by a Node B may be offset so that different WTRUs may have their DPCCH transmission phase in their respective DTX cycles at different times.
  • DPCCH is transmitted whenever E-DCH or HS-DPCCH is transmitted.
  • the WTRU does not transmit DPCCH except for a short burst of sub- frames once every UE_DTX_cycle_l sub-frames, (subframes 107, 109, 111, ).
  • the WTRU does not transmit DPCCH except for a short burst of sub-frames once every UE_DTX_cycle_2 sub-frames, (subframes 113, ).
  • a dual cell high speed downlink packet access (DC-HSDPA) mode has been introduced wherein two HSDPA carriers are used for downlink transmissions to increase the throughput per cell.
  • DC-HSDPA a cell is covered by up to two HSDPA carriers (possibly adjacent) in the same band. The frequency diversity between the carriers may provide a gain.
  • DC-HSDPA provides both an increase in throughput and a reduction in latency.
  • MIMO multiple -input multiple-out
  • DC-HSDPA allows more UEs access to higher data rates.
  • DC-HSDPA allows efficient load balancing across carriers in addition to some capacity gain.
  • a WTRU may be configured for DC-HSDPA operation in a CELL_DCH state.
  • a method and an apparatus for simultaneously receiving on two carriers and performing DTX and DRX in DC-HSDPA are disclosed.
  • a WTRU receives a message for activating DRX for at least one of an anchor carrier and a supplementary carrier and applies the same DRX pattern to the anchor carrier and the supplementary carrier upon reception of the message.
  • the message may be received via an HS-SCCH order.
  • the WTRU may de-activate DRX on both the anchor carrier and the supplementary carrier if data is received via any one of the anchor carrier and the supplementary carrier.
  • the WTRU may de-activate DRX on the supplementary carrier only if data is received via the supplementary carrier.
  • the WTRU may activate or de-activate the supplementary carrier based on the physical layer signal, such as HS-SCCH order.
  • the WTRU may deactivate the supplementary carrier upon expiration of an inactivity timer for the supplementary carrier.
  • the WTRU may apply the same DRX pattern to both an anchor carrier and the supplementary carrier upon activation of the supplementary carrier.
  • the WTRU may flush a hybrid automatic repeat request (HARQ) buffer associated with the supplementary carrier upon de-activation of the supplementary carrier.
  • HARQ hybrid automatic repeat request
  • the WTRU may process data received via the supplementary carrier as new data after re-activating the supplementary carrier.
  • Figure 1 shows a conventional DTX pattern
  • Figure 2 shows an example wireless communication system
  • FIG 3 is a block diagram of an example wireless transmit/receive unit (WTRU) and an example Node-B of the wireless communication system shown in Figure 2;
  • WTRU wireless transmit/receive unit
  • Figure 4 shows aligned DRX patterns for DC-HSDPA
  • Figure 5 shows offset DRX patterns for DC-HSDPA
  • Figure 6 shows dual cycle DRX patterns for DC-HSDPA
  • Figures 7 and 8 show example DRX de-activation on the anchor carrier after receiving data on the anchor carrier.
  • Figure 9 is a state diagram showing the transition of a WTRU state of DRX activation/de-activation and dual cell activation/de-activation.
  • the terminology “WTRU” includes but is not limited to a user equipment (UE), a mobile station, a fixed or mobile subscriber unit, a pager, a cellular telephone, a personal digital assistant (PDA), a computer, or any other type of user device capable of operating in a wireless environment.
  • the terminology “Node B” includes but is not limited to a base station, a site controller, an access point (AP), or any other type of interfacing device capable of operating in a wireless environment.
  • the terminology “cell” and “carrier” are used interchangeably with respect to DC-HSDPA.
  • anchor cell refers to a downlink carrier associated with the uplink carrier assigned to a WTRU
  • supplementary cell refers to a downlink carrier that is not the anchor carrier.
  • anchor cell and anchor carrier are equivalent to “serving cell” and “serving carrier” or “primary cell” and “primary carrier”
  • supplementary cell and supplementary carrier are equivalent to “secondary cell” and “secondary carrier.”
  • FIG. 2 shows an example wireless communication system 200 including a plurality of WTRUs 210, a Node-B 220, a controlling radio network controller (CRNC) 230, a serving radio network controller (SRNC) 240, and a core network 250.
  • the WTRUs 210 are in communication with the Node-B 220, which is in communication with the CRNC 230 and the SRNC 240.
  • the CRNC 230 and the SRNC 240 may be the same entity.
  • the Node B 220 and the WTRU 210 are DC-HSDPA-capable and may transmit and receive downlink data via two carriers.
  • FIG. 3 is a block diagram of an example WTRU 210 and an example Node-B 220.
  • the WTRU 210 is in communication with the Node-B 220 and both are configured to perform DTX and DRX in a DC-HSDPA mode.
  • the WTRU 210 includes a controller 215, a receiver 216, a transmitter 217, and an antenna 218.
  • the controller 215 is configured to control the receiver 216 and the transmitter 217 for DRX and DTX operations in a DC-HSDPA mode in accordance with embodiments disclosed below.
  • the Node-B 220 includes a controller 225, a receiver 226, a transmitter 227, and an antenna 228.
  • the controller 225 is configured to control the receiver 226 and the transmitter 227 for DTX and DRX operations in a DC-HSDPA mode in accordance with embodiments disclosed below.
  • the Node-B 220 may transmit data to the WTRU 210 via an anchor carrier and a supplementary carrier simultaneously and the WTRU 210 may receive data on the anchor carrier and the supplementary carrier simultaneously.
  • the anchor carrier and the supplementary carrier may operate in the same frequency band.
  • the anchor carrier and the supplementary carrier may have the same time reference and their downlinks may be synchronized.
  • a WTRU 210 may receive data from any one of the two downlink carriers. If the WTRU 210 is configured to monitor for the HS-SCCH on both carriers simultaneously, it would be advantageous to establish a new DRX pattern to take the supplementary carrier into consideration.
  • the DRX pattern (or equivalently the HS-SCCH reception pattern) for the anchor carrier may follow the conventional pattern currently implemented. Embodiments for configuring the DRX pattern for the supplementary carrier are disclosed below.
  • the DRX patterns for the anchor cell and the supplementary cell are aligned.
  • the WTRU HS-SCCH reception pattern for the supplementary carrier is exactly aligned to the HS- SCCH reception pattern of the anchor carrier. This allows the WTRU to monitor the HS-SCCH on both carriers at the same time, saving battery power depending on the WTRU hardware implementation and configuration. Additionally, this would allow the network to signal only one DRX pattern, which will be applied to both anchor cell and supplementary cell.
  • the DTX pattern of both anchor and supplementary uplink carriers may be aligned.
  • the network signals only one DTX pattern which is applied to both uplink carriers.
  • DTX pattern may be signaled via an HS-SCCH order, (i.e., DRX activation/deactivation bit in an HS-SCCH order), from the anchor cell or the supplementary cell and implicitly applied to both cells.
  • an HS- SCCH order may be transmitted via each cell to control DRX (and/or DTX) of each cell independently.
  • the HS-SCCH reception pattern for both carriers may be defined as a set of subframes whose HS-SCCH DRX radio frame number CFN_DRX and subframe number S_DRX satisfy the following equation:
  • Equation (1) where UE_DTX_DRX_Offset is uplink DPCCH burst pattern and HS-SCCH reception pattern offset in subframes, and UE_DRX_cycle is HS-SCCH reception pattern length in subframes.
  • the DRX patterns for the anchor cell and the supplementary cell are aligned such that the WTRU monitors HS-SCCH on subframes 407 and 409 and may receive HS-PDSCH on subframes 411 and 413, simultaneously.
  • the WTRU may be allowed to not listen to the supplementary carrier, (i.e., constant DRX), except during TTIs where the WTRU expects an HS-PDSCH (as would be indicated by an HS-SCCH sent over the anchor carrier).
  • the supplementary carrier i.e., constant DRX
  • the WTRU DRX pattern for the supplementary carrier is offset to the DRX pattern of the anchor carrier.
  • This offset is either pre-defined or configured by the network.
  • the HS-SCCH reception pattern for the anchor carrier may be defined as a set of subframes whose HS-SCCH DRX radio frame number CFN_DRX and subframe number S_DRX verify the following equation:
  • the SUPPC_OFFSET value may be one (1) in which case the DRX patterns for the anchor and supplementary carrier are staggered.
  • SUPPC_OFFSET may be set to floor(UE_DRX cycle / 2) in which case the DRX patterns for the anchor and supplementary carriers alternate.
  • Figure 5 shows offset DRX patterns for 2 ms TTI for
  • Top rows 503 show DRX pattern on the anchor cell and bottom rows 505 show DRX pattern on the supplementary cell.
  • the DRX patterns for the anchor cell and the supplementary cell are staggered such that the WTRU monitors HS-SCCH on subframes 507 and 509 and may receive HS-PDSCH on subframes 511 and 513.
  • the WTRU DTX cycle may be aligned to the DRX cycle of only the anchor carrier, or only the supplementary carrier.
  • the WTRU DTX cycle may be aligned with the DRX cycle of both the anchor and the supplementary carriers.
  • the WTRU may always be in continuous transmission (CTX) when in continuous reception (CRX) on one or both downlink carriers.
  • the initiation of the DRX and/or DTX mode may be signaled via an
  • the DRX and/or DTX may be activated for each cell independently, for example by using an HS-SCCH order originating from each cell.
  • the DRX patterns of the anchor carrier and the supplementary carrier may be configured independently, in which case different independent DRX cycles may be applied to different downlink carriers. In this case, the DRX may be activated and deactivated for each cell independently or jointly.
  • the WTRU may be allowed to not listen to the supplementary carrier (constant DRX), except during TTIs where the WTRU expects an HS-PDSCH (as would be indicated by an HS-SCCH sent over the anchor carrier).
  • a WTRU indicates to the network via higher layer signaling its reception pattern preference.
  • different WTRU implementation may benefit from a different DRX pattern.
  • the WTRU may signal one of the following options via higher layer signaling:
  • the WTRU prefers aligned DRX patterns across carriers
  • the WTRU prefers staggered DRX patterns across carriers
  • the WTRU may also indicate its preferred SUPPC_OFFSET value to the network via RRC signaling.
  • the network then configures the WTRU DRX pattern for the supplementary carrier accordingly.
  • the network may not satisfy the WTRU request.
  • the WTRU may assume that the network always uses the DRX pattern the WTRU requested.
  • the WTRU may be allowed to not listen to the supplementary carrier (constant DRX), except during TTIs where the WTRU expects an HS-PDSCH (as would be indicated by an HS-SCCH sent over the anchor carrier).
  • the WTRU DRX pattern for the supplementary carrier may have a different period than the DRX pattern of the anchor carrier.
  • the DRX pattern of the supplementary carrier period may be an integer multiple of the anchor carrier DRX pattern period.
  • the multiplicative factor may be pre-defined or signaled by the network.
  • the HS-SCCH reception pattern for the supplementary carrier may be defined as a set of subframes whose HS-SCCH DRX radio frame number CFN_DRX and subframe number S_DRX satisfy the following equation:
  • the multiplicative factor may be two (2).
  • the HS-SCCH reception pattern for the supplementary carrier may be defined as a set of subframes whose HS-SCCH DRX radio frame number CFN_DRX and subframe number S_DRX verify the following equation:
  • Figure 6 shows dual cycle DRX patterns for 2ms TTI with
  • Top rows 601 show DRX pattern on the anchor cell and bottom rows 603 show DRX pattern on the supplementary cell.
  • the DRX cycle of the supplementary cell is twice longer than that of the anchor cell such that the WTRU monitors HS-SCCH on subframes 605 on the anchor cell and subframes 609 on the supplementary cell, and may receive HS-PDSCH on subframes 607 and 611, respectively.
  • the DRX period applied to the supplementary and anchor carrier may be the same. Alternatively, a different independent DRX period may be applied, or the DRX period for the supplementary carrier may be an integer multiple of the anchor carrier DRX period.
  • the initiation of the DRX period is aligned with the DRX period of the anchor cell (perfectly aligned or aligned with an integer multiple of the DRX cycle as described above), but the duration may be different.
  • the DRX period of the anchor carrier may be an integer multiple of the DRX period of the supplementary carrier.
  • the WTRU DTX pattern may be aligned with the overlapping period of both anchor and supplementary DRX cycle. This will allow the WTRU to fully turn off the radio on all carriers and both uplink and downlink, thus optimizing battery life.
  • the DTX period may be aligned with the DRX period of the anchor cell or the supplementary cell.
  • Embodiments for DRX and/or DTX activation and de-activations are disclosed hereafter.
  • the WTRU gets out of DRX to listen to subsequent HS-SCCH for a period of Inactivity_Threshold_for_UE_DRX_cycle.
  • the HS-SCCH may be received on either one of the two downlink carriers.
  • a data transmission may include, but is not limited to, the HS-SCCH and HS-PDSCH, but fractional dedicated physical channel (F-DPCH) and HS-SCCH orders may not be considered as data transmissions.
  • F-DPCH fractional dedicated physical channel
  • the DRX activation and deactivation are totally independent on each downlink carrier. If data is received on the supplementary carrier, the WTRU monitors the supplementary carrier for HS-SCCH (or HS-PDSCH) for the pre-configured period of time. The DRX pattern on the anchor carrier may be maintained as if no data has been received at the WTRU. The same scheme is applied if data is received on the anchor carrier.
  • Figure 7 shows an example DRX de-activation on the anchor carrier after receiving data on the anchor carrier.
  • the top rows 701 and 702 are Node B transmissions on the anchor cell and the supplementary cell, respectively.
  • the bottom rows 703 and 704 show DRX patterns of the WTRU on the anchor cell and the supplementary cell, respectively.
  • the WTRU listens to an HS-SCCH on subframes 707 and 709 on both anchor and supplementary carriers in accordance with the configured DRX pattern.
  • the Node B transmits an HS-SCCH via the anchor cell on subframes 705 and 706.
  • the WTRU deactivates the DRX on the anchor cell and starts monitoring on the anchor cell for Inactivity _Threshold_for_UE_DRX_cycle subframes, (i.e., subframes 708) from the last transmission 706 on the anchor cell.
  • the WTRU monitors an HS-SCCH on the supplementary cell in accordance with the normal DRX pattern, (i.e., monitors subframes 709).
  • the DRX patterns of the anchor and supplementary carriers may be linked together.
  • Figure 8 shows an example DRX de-activation on the anchor carrier after receiving data on the anchor carrier in accordance with this alternative.
  • the top rows 801 and 802 are Node B transmissions on the anchor cell and the supplementary cell, respectively.
  • the bottom rows 803 and 804 show DRX patterns of the WTRU on the anchor cell and the supplementary cell, respectively.
  • the WTRU listens to an HS-SCCH on subframes 807 and 809 on both anchor and supplementary carriers in accordance with the configured DRX pattern.
  • the Node B transmits an HS-SCCH via the anchor cell on subframes 805 and 806.
  • the WTRU deactivates the DRX on both the anchor cell and the supplementary cell and starts monitoring on the anchor cell and the supplementary cell for Inactivity _Threshold_for_UE_DRX_cycle subframes, (i.e., subframes 808 and 810) from the last transmission 806 on the anchor cell.
  • the WTRU monitors both supplementary and anchor carriers for an HS-SCCH and/or an HS-PDSCH for the duration of
  • DRX may be maintained on the supplementary carrier.
  • These different mechanisms may be configured by the network using L3 signaling or predefined in the WTRU.
  • Embodiments for HS-PDSCH carrier indication are described hereinafter.
  • an additional indication needs to be provided to indicate on which carrier to listen to for the associated HS-PDSCH.
  • the embodiments described below are applicable to HS- SCCH scheduling for data transmissions over the HS-PDSCH or for HS-SCCH orders, wherein the WTRU does not need to monitor the HS-PDSCH after decoding its HS-DSCH radio network temporary identity (H-RNTI) on the HS- SCCH.
  • H-RNTI radio network temporary identity
  • the WTRU needs to monitor for the HS-PDSCH or the HS-SCCH is linked directly to the HS-SCCH channelization code.
  • This may be achieved by adding an information element (IE) indicating the carrier (anchor or supplementary) in the HS-SCCH Info information element (IE) as defined in 3GPP TS 25.331 V.8.5.0 section 10.3.6.36a.
  • IE information element
  • a new row may be added to the HS-SCCH Info IE as shown in Table 1.
  • the newly added item for indicating the downlink carrier is underlined in Table 1.
  • each carrier is assigned a distinct H-RNTI (one for anchor charier and the other for supplementary carrier).
  • the WTRU monitors the HS-SCCH for both H-RNTIs. If the H-RNTI of the anchor carrier is decoded on the HS-SCCH the WTRU knows that the scheduling is applicable to the anchor carrier and if the H-RNTI of the supplementary carrier is decoded on the HS-SCCH the WTRU knows that the scheduling is applicable to the supplementary carrier.
  • the carrier for the associated HS-PDSCH may be explicitly indicated in the associated HS-SCCH.
  • the carrier information must be carried on the first part of the HS-SCCH as the WTRU needs this information to start buffering the HS-PDSCH.
  • the carrier indication bit, Xd may be included as part of the conventional channelization code set bits in the HS-SCCH. This may be achieved by reducing the channelization code scheduling flexibility at the expense of carrier flexibility.
  • a WTRU configured for DC-HSDPA operations would automatically re-interpret the channelization code set bits of the HS- SCCH according to a new definition to determine the carrier indication, the channelization code offset and the number of HS-PDSCH codes in the associated data transmission.
  • a new HS-SCCH type may be defined, where the first part contains an additional bit for carrier indication.
  • the new HS-SCCH type may include the following information in its part 1:
  • the new HS-SCCH type may include the following information in its part 1:
  • the WTRU determines whether it should decode data on the anchor carrier or on the supplementary carrier based on the timing of the HS-SCCH reception on either the anchor carrier or the supplementary carrier.
  • the indication is naturally based on the same criteria (formula) as the ones used to determine whether the WTRU should attempt reception on one of the carriers.
  • the HS-SCCH points to the anchor carrier if it is received at a time instant where reception on the anchor carrier is possible according to the DRX pattern, and on the supplementary carrier if it is received at a time instant where reception on the supplementary carrier is possible according to the DRX pattern.
  • the HS-SCCH may be transmitted on either the anchor carrier or the supplementary carrier, but no explicit indication of which carrier should be listened to has to be provided in the HS-SCCH itself.
  • the WTRU may decode the HS-PDSCH on the anchor carrier if the HS-SCCH is received on the set of subframes whose radio frame number CFN_Anchor and subframe number S_Anchor satisfy the following equation:
  • the WTRU may need to receive the HS-SCCH in two consecutive TTIs starting from the sub- frames defined by the DRX reception pattern of either carrier.
  • Embodiments for fast supplementary carrier activation and deactivation are disclosed hereafter.
  • the activation and de-activation of the supplementary carrier is performed by using Ll or L2 signaling.
  • the network transmits an Ll signal to indicate to the WTRU that it should apply continuous reception (effectively de-activate DRX) to the supplementary carrier. This may be achieved by using a new HS-SCCH order or a new type of Ll message.
  • the new HS-SCCH order or Ll message may be transmitted on either the anchor carrier or supplementary carrier.
  • the WTRU Upon reception of this signal from the network, the WTRU is allowed to start or stop monitoring the supplementary carrier based on the HS-SCCH order or Ll message, (e.g., supplementary carrier activation for '1' and supplementary carrier deactivation for O').
  • the WTRU may autonomously disable monitoring the supplementary carrier, (i.e., HS-SCCH and/or HS-DPSCH on the supplementary carrier), upon expiration of an inactivity timer. More specifically, if no downlink data is received for a configured amount of time in the supplementary cell or optionally in both anchor and supplementary cells, the WTRU may disable monitoring on the supplementary cell.
  • the supplementary carrier i.e., HS-SCCH and/or HS-DPSCH on the supplementary carrier
  • the network may transmit an HS-SCCH order or Ll signal to the
  • the WTRU may indicate activation of the supplementary carrier. This may be achieved by using a new HS-SCCH order or a new type of Ll message on the anchor carrier.
  • the WTRU may autonomously enable monitoring of the supplementary carrier if downlink traffic is received.
  • the criteria to enable monitoring of the supplementary carrier may be dependent on the type of traffic being received or the amount of data.
  • the WTRU may start monitoring the supplementary carrier using the same configuration as before de-activation order is received, or stop monitoring the supplementary carrier. In particular, the DRX status for the supplementary carrier may be restored to the state it was before the deactivation order was received.
  • the DRX for the supplementary carrier may be always disabled (or alternatively always enabled).
  • the DRX state of the supplementary carrier upon activation or re-activation may be configured by higher layer signaling.
  • the WTRU may start using the same DRX pattern as the anchor cell, (aligned or staggered). For instance, if the anchor cell has DRX active at the time of activation of the supplementary cell, the WTRU may also initiate DRX using the same reception patterns. If the anchor cell is in CRX the supplementary carrier may also be in CRX.
  • the supplementary carrier activation and de-activation may also be considered as a dual (or multi) DRX scheme.
  • the fist DRX cycle comprises DRX patterns being applied to both carriers using one of the embodiments applied above, while the second DRX cycle comprises disabling the supplementary carrier and continued a DRX pattern or continuous reception on the anchor carrier.
  • This is a 2-stage DRX mechanism.
  • the first stage comprises going for CRX to DRX and the second stage comprises going from DRX to inactive.
  • the transition between the DRX cycles may depend on one or a combination of the following options:
  • the WTRU may transition to the first DRX cycle (where both carriers are in DRX) if an HS-SCCH order is received or if downlink traffic is received. Alternatively, the WTRU may transition directly to continuous transmission from the second DRX cycle.
  • downlink traffic i.e., HS-SCCH or HS-DPSCH
  • the WTRU may disable and enable monitoring of the downlink anchor cell channels, (i.e., HS-SCCH and/or HS-DPSCH), and listens to the supplementary cell using a configured DRX cycle or continuous reception in supplementary cell.
  • the downlink anchor cell channels i.e., HS-SCCH and/or HS-DPSCH
  • the options described above, to enable/disable monitoring of the supplementary cell are also applicable to this alternative.
  • Embodiments for improving the power-saving at the WTRU are disclosed hereafter.
  • a new set of rules and signaling is defined for fast activation and de-activation of DRX/DTX for a WTRU in a DC-HSDPA mode. Activation and de-activation may be performed separately for each downlink carrier. This may be achieved by signaling explicitly the activation/deactivation order to the WTRU over separate HS-SCCH orders for each carrier. This flexibility results in additional power consumption, signaling load, and increased code space usage on the downlink.
  • DC-HSDPA-capable WTRU is defined by the combination of the status of the supplementary carrier (active or not), the DRX state (active or not active) of the anchor and supplementary carriers, and the DTX status (active or not active) on the uplink carrier.
  • a DC-HSDPA-capable WTRU may be in a number of dual DTX/DRX states. Some transitions from one dual DTX/DRX state to another may be more prevalent than others. As such, the signaling cost associated to these should be minimized.
  • Rule 1 When the supplementary carrier is in the active state and when DRX is explicitly activated at the anchor carrier (via a regular Release- 7 HS-SCCH order), DRX is implicitly activated on the supplementary carrier. This rule allows reducing the number of HS-SCCH orders to put the WTRU in DRX for both carriers in periods of low downlink activity.
  • Rule 2 Upon explicit activation of the supplementary carrier, (e.g., via an HS-SCCH order), the DRX on both the anchor and supplementary carriers is implicitly deactivated.
  • the DTX on the UL anchor carrier (and optionally on the UL supplementary carrier, if it exists) is also implicitly deactivated. While this could be achieved via multiple HS-SCCH orders, this new rule allows the network to quickly turn the WTRU in a very active state in a period of high downlink activity.
  • DRX is implicitly enabled at the anchor carrier.
  • DTX may also be implicitly enabled at the UL anchor carrier. This rule allows the network to move a WTRU into battery saving mode faster in period of low activity.
  • Rule 4 When DRX is explicitly disabled (e.g., via an HS-SCCH order) on the supplementary carrier, the DRX on the anchor carrier is implicitly disabled. Optionally, if a secondary UL carrier exists, when DTX is explicitly disabled on the secondary UL carrier, DTX is implicitly disabled on the UL anchor carrier. This rule allows the network to move a WTRU into battery saving mode faster in period of low activity.
  • Figure 9 shows how using single supplementary carrier activation and deactivation orders may be used in conjunction with Rule 2 and Rule 3 to achieve transitions from low to high power states, and vice versa.
  • four states are defined: state 1 (supplementary cell active, DRX both cells active), state 2 (supplementary cell active, DRX both cells not active), state 3 (supplementary cell not active, DRX both cells active), and state 4 (supplementary cell not active, DRX both cells not active).
  • supplementary cell activation order step 902
  • the WTRU transitions from state 3 to state 2 and activates the supplementary cell and deactivates DRX for both cells.
  • supplementary cell deactivation order step 904
  • the WTRU transitions from state 3 to state 2 and deactivates the supplementary cell and activates the DRX for both cells.
  • rule 2 and Rule 3 may also be achieved by using explicit signaling.
  • explicit signaling One possible way to do this using a single HS-SCCH order by using reserved bits in the conventional HS-SCCH order bits for activation and deactivation of the supplementary cell and indicating activation and deactivation of DRX (for both anchor and supplementary carriers) and optionally DTX (on the UL carrier), respectively.
  • the first bit of the three HS-SCCH order bits may be used to indicate DRX activation and deactivation of the anchor and supplementary cells and the second bit of the three HS-SCCH order bits may be used to indicate DTX activation and deactivation.
  • the first bit is set to O'
  • the HS-SCCH order is a DRX de-activation order for both the anchor and supplementary cells.
  • the first bit is set to '1'
  • the HS-SCCH order is a DRX activation order for both the anchor and supplementary cells.
  • the second bit is set to O'
  • the HS-SCCH order is a DTX de-activation order.
  • the second bit is set to '1', the HS-SCCH order is a DTX activation order.
  • the DTX may also be applied to both anchor and supplementary uplink carriers.
  • DC-HSDPA two channel quality indicator (CQI) feedback cycle values must be given to the WTRU: one for the anchor cell and another for the supplementary cell. These values may be explicitly provided to the WTRU by the network via RRC signaling: one for the anchor carrier (denoted by variable k) and one for the supplementary carrier (denoted by variable k s ). This allows the CQI reporting rate to be adjusted by the network, for example to optimize with respect to different DRX cycles.
  • CQI channel quality indicator
  • the CQI feedback cycle duration for the supplementary carrier may implicitly be determined by the WTRU.
  • WTRU actions when activating/de-activating the supplementary cell via an HS-SCCH order are described.
  • the WTRU may flush the HARQ buffers associated to the supplementary cell, and/or instruct the medium access control (MAC) entity that the next received HARQ transmission (upon re-activation of the supplementary cell) for each configured HARQ processes associated to the supplementary cell should be considered as a first transmission.
  • MAC medium access control
  • the RRC layer may instruct the MAC layer that the next HARQ transmission for all configured HARQ processes associated to the supplementary cell should be considered as a first HARQ transmission.
  • the RRC layer may also instruct the MAC layer to flush the HARQ buffers associated to the supplementary cell.
  • a WTRU configured to perform DRX in DC-HSDPA.
  • the WTRU of embodiment 18 comprising a receiver configured to receive a message for activating DRX for at least one of an anchor carrier and a supplementary carrier.
  • the WTRU of embodiment 19 comprising a controller configured to apply a same DRX pattern to the anchor carrier and the supplementary carrier upon reception of the message.
  • the WTRU as in any one of embodiments 19-20, wherein the receiver is configured to receive the message via an HS-SCCH order.
  • the controller is configured to de-activate DRX on both the anchor carrier and the supplementary carrier on a condition that data is received via any one of the anchor carrier and the supplementary carrier.
  • the controller is configured to de-activate DRX on both the anchor carrier and supplementary carrier upon receipt of a second message for de-activating DRX for at least one of an anchor carrier and a supplementary carrier.
  • the WTRU of embodiment 25 comprising a receiver configured to receive a physical layer signal for activating a supplementary carrier via an anchor carrier.
  • the WTRU of embodiment 26 comprising a controller configured to activate the supplementary carrier upon receipt of the physical layer signal.
  • the Node B of embodiment 33 comprising a transmitter configured to transmit an HS-SCCH order.
  • the Node B of embodiment 34 comprising a controller configured to send an HS-SCCH order for activating DRX in a WTRU with a same DRX pattern for the anchor carrier and the supplementary carrier.
  • a Node B for supporting DC-HSDPA operations [00130] 37.
  • the Node B of embodiment 36 comprising a transmitter configured to transmit a physical layer signal.
  • the Node B of embodiment 37 comprising a controller configured to send a first physical layer signal via an anchor carrier for activating a supplementary carrier for a wireless transmit/receive unit and send a second physical layer signal for de-activating the supplementary carrier for the WTRU via one of the anchor carrier and the supplementary carrier.
  • a method implemented in a WTRU for simultaneously receiving on two carriers in DC-HSDPA comprising activating a supplementary carrier.
  • a WTRU configured to receive on two carriers simultaneously in DC-HSDPA comprising a receiver configured to receive a physical layer signal for de-activating a supplementary carrier via one of an anchor carrier and the supplementary carrier.
  • the WTRU of embodiment 42 comprising a controller configured to de-activate the supplementary carrier upon receipt of the physical layer signal.
  • ROM read only memory
  • RAM random access memory
  • register cache memory
  • semiconductor memory devices magnetic media such as internal hard disks and removable disks, magneto-optical media, and optical media such as CD-ROM disks, and digital versatile disks (DVDs).
  • Suitable processors include, by way of example, a general purpose processor, a special purpose processor, a conventional processor, a digital signal processor (DSP), a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) circuits, any other type of integrated circuit (IC), and/or a state machine.
  • a processor in association with software may be used to implement a radio frequency transceiver for use in a wireless transmit receive unit (WTRU), user equipment (UE), terminal, base station, radio network controller (RNC), or any host computer.
  • WTRU wireless transmit receive unit
  • UE user equipment
  • RNC radio network controller
  • the WTRU may be used in conjunction with modules, implemented in hardware and/or software, such as a camera, a video camera module, a videophone, a speakerphone, a vibration device, a speaker, a microphone, a television transceiver, a hands free headset, a keyboard, a Bluetooth® module, a frequency modulated (FM) radio unit, a liquid crystal display (LCD) display unit, an organic light- emitting diode (OLED) display unit, a digital music player, a media player, a video game player module, an Internet browser, and/or any wireless local area network (WLAN) or Ultra Wide Band (UWB) module.
  • modules implemented in hardware and/or software, such as a camera, a video camera module, a videophone, a speakerphone, a vibration device, a speaker, a microphone, a television transceiver, a hands free headset, a keyboard, a Bluetooth® module, a frequency modulated (FM) radio unit, a liquid crystal display (LCD) display

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A method and an apparatus for simultaneously receiving on two carriers and performing discontinuous transmission (DTX) and discontinuous reception (DRX) in dual cell high speed downlink packet access (DC-HSDPA) are disclosed. A wireless transmit/receive unit (WTRU) receives a message for activating DRX for at least one of an anchor carrier and a supplementary carrier and applies the same DRX pattern to the anchor carrier and the supplementary carrier upon reception of the message. The message may be received via a high speed shared control channel (HS-SCCH) order. The WTRU may activate or de-activate the supplementary carrier based on the physical layer signal. Upon activation of the supplementary carrier, the WTRU may apply the same DRX pattern on both the anchor carrier and the supplementary carrier. The WTRU may flush a hybrid automatic repeat request (HARQ) buffer associated with the supplementary carrier upon de-activation of the supplementary carrier.

Description

[0001] METHOD AND APPARATUS FOR SIMULTANEOUSLY
RECEIVING ON TWO CARRIERS AND PERFORMING DISCONTINUOUS TRANSMISSION AND RECEPTION IN DUAL CELL HIGH SPEED DOWNLINK PACKET ACCESS
[0002] FIELD OF INVENTION
[0003] This application is related to wireless communications.
[0004] BACKGROUND
[0005] The third generation partnership project (3GPP) standards are continuously evolving. Early releases focused primarily on voice communications, while more recent releases have directed attention to data communication services such as high speed packet access (HSPA). The continued development of packet access services is driven by the desire of mobile users to be connected to Internet from anywhere at any time for leisure, business or other pursuits.
[0006] Continuous Packet Connectivity (CPC) was introduced in Release 7 to keep a device on the high speed channels, (i.e., in active state), as long as possible while no data transfer is ongoing by reducing the negative effects of remaining active during periods of low activity, (i.e., reducing power consumption and reducing the bandwidth requirements for radio layer signaling during that time). Among the features implemented along with CPC are discontinuous transmission (DTX) and discontinuous reception (DRX). DTX patterns and DRX patterns along with associated sets of rules allow a wireless transmit/receive unit (WTRU) to turn off its transmitter and receiver during periods of low activity to conserve power.
[0007] Uplink DTX is a mechanism that defines how the WTRU will discontinuously transmit the dedicated physical control channel (DPCCH). The uplink DTX is configured by a radio network controller (RNC). The uplink DPCCH burst pattern and the uplink DPCCH preamble and postamble together define the discontinuous uplink DPCCH operation. Uplink DTX is dependent on enhanced dedicated channel (E-DCH) and high speed dedicated physical control channel (HS-DPCCH) activity. Uplink DTX may be configured without configuring downlink DRX.
[0008] Figure 1 shows a DPCCH burst pattern for the uplink. Two DTX patterns (UE_DTX_cycle_l and UE_DTX_cycle_2) are defined for a WTRU for discontinuous uplink DPCCH operation. Either UE_DTX_cycle_l or UE_DTX_cycle_2 is applied dependent on the duration of E-DCH inactivity. UE_DTX_cycle_2 is used when there is no E-DCH transmission for a predetermined number of subframes. Accordingly, the DPCCH transmission rate is autonomously adapted to data transmission activity. For example, during higher data transmission activity the uplink DPCCH may be configured to transmit more frequently, while during lower data transmission activity the DPCCH may be configured to transmit less often to produce a DTX gain. The DPCCH burst patterns for different WTRUs serviced by a Node B may be offset so that different WTRUs may have their DPCCH transmission phase in their respective DTX cycles at different times.
[0009] DPCCH is transmitted whenever E-DCH or HS-DPCCH is transmitted. When a WTRU is not transmitting data on an E-DCH or an HS- DPCCH, the WTRU does not transmit DPCCH except for a short burst of sub- frames once every UE_DTX_cycle_l sub-frames, (subframes 107, 109, 111, ...). If the WTRU has not transmitted E-DCH during the last Inactivity_Threshold_for_UE_DTX_cycle_2 sub-frames, (last E-DCH frame 101), the WTRU does not transmit DPCCH except for a short burst of sub-frames once every UE_DTX_cycle_2 sub-frames, (subframes 113, ...).
[0010] A dual cell high speed downlink packet access (DC-HSDPA) mode has been introduced wherein two HSDPA carriers are used for downlink transmissions to increase the throughput per cell. In a DC-HSDPA mode, a cell is covered by up to two HSDPA carriers (possibly adjacent) in the same band. The frequency diversity between the carriers may provide a gain. DC-HSDPA provides both an increase in throughput and a reduction in latency. In poor radio conditions, where other techniques such as multiple -input multiple-out (MIMO) may not be practical, DC-HSDPA allows more UEs access to higher data rates. On the network side, DC-HSDPA allows efficient load balancing across carriers in addition to some capacity gain. A WTRU may be configured for DC-HSDPA operation in a CELL_DCH state.
[0011] While DTX and DRX operations are well defined for single carrier operations, there is currently no mechanism to handle DRX operations in a DC- HSDPA mode. In addition, in case that an HS-SCCH is transmitted only one of the carriers, there is currently no mechanism to indicate to the WTRU on which carrier the associated HS-PDSCH is transmitted on.
[0012] SUMMARY
[0013] A method and an apparatus for simultaneously receiving on two carriers and performing DTX and DRX in DC-HSDPA are disclosed. A WTRU receives a message for activating DRX for at least one of an anchor carrier and a supplementary carrier and applies the same DRX pattern to the anchor carrier and the supplementary carrier upon reception of the message. The message may be received via an HS-SCCH order. The WTRU may de-activate DRX on both the anchor carrier and the supplementary carrier if data is received via any one of the anchor carrier and the supplementary carrier. Alternatively, the WTRU may de-activate DRX on the supplementary carrier only if data is received via the supplementary carrier.
[0014] The WTRU may activate or de-activate the supplementary carrier based on the physical layer signal, such as HS-SCCH order. The WTRU may deactivate the supplementary carrier upon expiration of an inactivity timer for the supplementary carrier. The WTRU may apply the same DRX pattern to both an anchor carrier and the supplementary carrier upon activation of the supplementary carrier. The WTRU may flush a hybrid automatic repeat request (HARQ) buffer associated with the supplementary carrier upon de-activation of the supplementary carrier. Alternatively, the WTRU may process data received via the supplementary carrier as new data after re-activating the supplementary carrier.
[0015] BRIEF DESCRIPTION OF THE DRAWINGS
[0016] A more detailed understanding may be had from the following description, given by way of example in conjunction with the accompanying drawings wherein:
[0017] Figure 1 shows a conventional DTX pattern;
[0018] Figure 2 shows an example wireless communication system;
[0019] Figure 3 is a block diagram of an example wireless transmit/receive unit (WTRU) and an example Node-B of the wireless communication system shown in Figure 2;
[0020] Figure 4 shows aligned DRX patterns for DC-HSDPA;
[0021] Figure 5 shows offset DRX patterns for DC-HSDPA;
[0022] Figure 6 shows dual cycle DRX patterns for DC-HSDPA;
[0023] Figures 7 and 8 show example DRX de-activation on the anchor carrier after receiving data on the anchor carrier; and
[0024] Figure 9 is a state diagram showing the transition of a WTRU state of DRX activation/de-activation and dual cell activation/de-activation.
[0025] DETAILED DESCRIPTION
[0026] When referred to hereafter, the terminology "WTRU" includes but is not limited to a user equipment (UE), a mobile station, a fixed or mobile subscriber unit, a pager, a cellular telephone, a personal digital assistant (PDA), a computer, or any other type of user device capable of operating in a wireless environment. When referred to hereafter, the terminology "Node B" includes but is not limited to a base station, a site controller, an access point (AP), or any other type of interfacing device capable of operating in a wireless environment. [0027] Hereinafter, the terminology "cell" and "carrier" are used interchangeably with respect to DC-HSDPA. When referred to hereafter, the terminology "anchor cell" refers to a downlink carrier associated with the uplink carrier assigned to a WTRU, and the terminology "supplementary cell" refers to a downlink carrier that is not the anchor carrier. Hereinafter, the terminologies "anchor cell" and "anchor carrier" are equivalent to "serving cell" and "serving carrier" or "primary cell" and "primary carrier", and the terminologies "supplementary cell" and "supplementary carrier" are equivalent to "secondary cell" and "secondary carrier."
[0028] Figure 2 shows an example wireless communication system 200 including a plurality of WTRUs 210, a Node-B 220, a controlling radio network controller (CRNC) 230, a serving radio network controller (SRNC) 240, and a core network 250. The WTRUs 210 are in communication with the Node-B 220, which is in communication with the CRNC 230 and the SRNC 240. The CRNC 230 and the SRNC 240 may be the same entity. The Node B 220 and the WTRU 210 are DC-HSDPA-capable and may transmit and receive downlink data via two carriers.
[0029] Figure 3 is a block diagram of an example WTRU 210 and an example Node-B 220. The WTRU 210 is in communication with the Node-B 220 and both are configured to perform DTX and DRX in a DC-HSDPA mode. The WTRU 210 includes a controller 215, a receiver 216, a transmitter 217, and an antenna 218. The controller 215 is configured to control the receiver 216 and the transmitter 217 for DRX and DTX operations in a DC-HSDPA mode in accordance with embodiments disclosed below. The Node-B 220 includes a controller 225, a receiver 226, a transmitter 227, and an antenna 228. The controller 225 is configured to control the receiver 226 and the transmitter 227 for DTX and DRX operations in a DC-HSDPA mode in accordance with embodiments disclosed below.
[0030] The Node-B 220 may transmit data to the WTRU 210 via an anchor carrier and a supplementary carrier simultaneously and the WTRU 210 may receive data on the anchor carrier and the supplementary carrier simultaneously.
The anchor carrier and the supplementary carrier may operate in the same frequency band. The anchor carrier and the supplementary carrier may have the same time reference and their downlinks may be synchronized. [0031] When DC-HSDPA operation is activated, a WTRU 210 may receive data from any one of the two downlink carriers. If the WTRU 210 is configured to monitor for the HS-SCCH on both carriers simultaneously, it would be advantageous to establish a new DRX pattern to take the supplementary carrier into consideration. The DRX pattern (or equivalently the HS-SCCH reception pattern) for the anchor carrier may follow the conventional pattern currently implemented. Embodiments for configuring the DRX pattern for the supplementary carrier are disclosed below.
[0032] In accordance with a first embodiment, the DRX patterns for the anchor cell and the supplementary cell are aligned. The WTRU HS-SCCH reception pattern for the supplementary carrier is exactly aligned to the HS- SCCH reception pattern of the anchor carrier. This allows the WTRU to monitor the HS-SCCH on both carriers at the same time, saving battery power depending on the WTRU hardware implementation and configuration. Additionally, this would allow the network to signal only one DRX pattern, which will be applied to both anchor cell and supplementary cell.
[0033] Optionally, if there is a supplementary uplink carrier, the DTX pattern of both anchor and supplementary uplink carriers may be aligned. The network signals only one DTX pattern which is applied to both uplink carriers. [0034] The initiation (or activation and deactivation) of the DRX and/or
DTX pattern may be signaled via an HS-SCCH order, (i.e., DRX activation/deactivation bit in an HS-SCCH order), from the anchor cell or the supplementary cell and implicitly applied to both cells. Alternatively, an HS- SCCH order may be transmitted via each cell to control DRX (and/or DTX) of each cell independently.
[0035] In accordance with the first embodiment, the HS-SCCH reception pattern for both carriers may be defined as a set of subframes whose HS-SCCH DRX radio frame number CFN_DRX and subframe number S_DRX satisfy the following equation:
((5xCFN_DRX - UE_DTX_DRX_Offset + S_DRX) MOD UE_DRX cycle) = 0;
Equation (1) where UE_DTX_DRX_Offset is uplink DPCCH burst pattern and HS-SCCH reception pattern offset in subframes, and UE_DRX_cycle is HS-SCCH reception pattern length in subframes.
[0036] Figure 4 shows aligned DRX patterns for 2 ms transmission time interval (TTI) for UE_DRX_cycle=4. Top rows 403 show DRX pattern on the anchor cell and bottom rows 405 show DRX pattern on the supplementary cell. The DRX patterns for the anchor cell and the supplementary cell are aligned such that the WTRU monitors HS-SCCH on subframes 407 and 409 and may receive HS-PDSCH on subframes 411 and 413, simultaneously. [0037] In addition, if the WTRU is not configured to monitor any HS-SCCH on the supplementary carrier, the WTRU may be allowed to not listen to the supplementary carrier, (i.e., constant DRX), except during TTIs where the WTRU expects an HS-PDSCH (as would be indicated by an HS-SCCH sent over the anchor carrier).
[0038] In accordance with a second embodiment, the WTRU DRX pattern for the supplementary carrier is offset to the DRX pattern of the anchor carrier. This offset is either pre-defined or configured by the network. In either cases, the HS-SCCH reception pattern for the anchor carrier may be defined as a set of subframes whose HS-SCCH DRX radio frame number CFN_DRX and subframe number S_DRX verify the following equation:
((5xCFN_DRX - UE_DTX_DRX_Offset + S_DRX) MOD UE_DRX cycle) = 0.
Equation (2)
[0039] The HS-SCCH reception pattern for the supplementary carrier may be defined as a set of subframes whose HS-SCCH discontinuous reception radio frame number CFN_DRX and subframe number S_DRX verify the following equation: ((5xCFN_DRX - UE_DTX_DRX_Oflfeet + SUPPC_OFFSET+S_DRX) MOD UE_DRX cycle) = 0; Equation (3) where SUPPC_OFFSET is the offset of the HS-SCCH reception pattern for the supplementary carrier to the HS-SCCH reception pattern for the anchor carrier. SUPPC_OFFSET may be pre-defined or configured by the network. The SUPPC_OFFSET value may be one (1) in which case the DRX patterns for the anchor and supplementary carrier are staggered. Alternatively, SUPPC_OFFSET may be set to floor(UE_DRX cycle / 2) in which case the DRX patterns for the anchor and supplementary carriers alternate.
[0040] Figure 5 shows offset DRX patterns for 2 ms TTI for
UE_DRX_cycle=4 and SUPP C_O FFS ET=I. Top rows 503 show DRX pattern on the anchor cell and bottom rows 505 show DRX pattern on the supplementary cell. The DRX patterns for the anchor cell and the supplementary cell are staggered such that the WTRU monitors HS-SCCH on subframes 507 and 509 and may receive HS-PDSCH on subframes 511 and 513.
[0041] The WTRU DTX cycle may be aligned to the DRX cycle of only the anchor carrier, or only the supplementary carrier. Alternatively, the WTRU DTX cycle may be aligned with the DRX cycle of both the anchor and the supplementary carriers. Alternatively, the WTRU may always be in continuous transmission (CTX) when in continuous reception (CRX) on one or both downlink carriers.
[0042] The initiation of the DRX and/or DTX mode may be signaled via an
HS-SCCH order from the anchor cell or the supplementary cell and implicitly applied to both cells. Alternatively, the DRX and/or DTX may be activated for each cell independently, for example by using an HS-SCCH order originating from each cell.
[0043] The DRX patterns of the anchor carrier and the supplementary carrier may be configured independently, in which case different independent DRX cycles may be applied to different downlink carriers. In this case, the DRX may be activated and deactivated for each cell independently or jointly. [0044] In addition, if the WTRU is not configured to monitor any HS-SCCH on the supplementary carrier, the WTRU may be allowed to not listen to the supplementary carrier (constant DRX), except during TTIs where the WTRU expects an HS-PDSCH (as would be indicated by an HS-SCCH sent over the anchor carrier).
[0045] In accordance with a third embodiment, a WTRU indicates to the network via higher layer signaling its reception pattern preference. Depending on the carrier spacing, different WTRU implementation may benefit from a different DRX pattern. For example, the WTRU may signal one of the following options via higher layer signaling:
(1) The WTRU prefers aligned DRX patterns across carriers;
(2) The WTRU prefers staggered DRX patterns across carriers; or
(3) Any of other DRX pattern described throughout this disclosure. The WTRU may also indicate its preferred SUPPC_OFFSET value to the network via RRC signaling. The network then configures the WTRU DRX pattern for the supplementary carrier accordingly. The network may not satisfy the WTRU request. Alternatively, the WTRU may assume that the network always uses the DRX pattern the WTRU requested.
[0046] In addition, if the WTRU is not configured to monitor any HS-SCCH on the supplementary carrier, the WTRU may be allowed to not listen to the supplementary carrier (constant DRX), except during TTIs where the WTRU expects an HS-PDSCH (as would be indicated by an HS-SCCH sent over the anchor carrier).
[0047] In accordance with a fourth embodiment, the WTRU DRX pattern for the supplementary carrier may have a different period than the DRX pattern of the anchor carrier. The DRX pattern of the supplementary carrier period may be an integer multiple of the anchor carrier DRX pattern period. The multiplicative factor may be pre-defined or signaled by the network. [0048] If the multiplicative factor is M, the HS-SCCH reception pattern for the supplementary carrier may be defined as a set of subframes whose HS-SCCH DRX radio frame number CFN_DRX and subframe number S_DRX satisfy the following equation:
((5xCFN_DRX - UE_DTX_DRX_Offset + S_DRX) MOD (M x UE_DRX cycle)) = 0.
Equation (4)
[0049] For example, the multiplicative factor may be two (2). In this case, the HS-SCCH reception pattern for the supplementary carrier may be defined as a set of subframes whose HS-SCCH DRX radio frame number CFN_DRX and subframe number S_DRX verify the following equation:
((5xCFN_DRX - UE_DTX_DRX_Offset + S_DRX) MOD (2 x UEJDRX cycle)) = 0.
Equation (5)
[0050] Figure 6 shows dual cycle DRX patterns for 2ms TTI with
UE_DRX_cycle=2 and M=2, where the DRX cycle of the supplementary cell is exactly twice as long as the DRX cycle for the anchor cell. Top rows 601 show DRX pattern on the anchor cell and bottom rows 603 show DRX pattern on the supplementary cell. The DRX cycle of the supplementary cell is twice longer than that of the anchor cell such that the WTRU monitors HS-SCCH on subframes 605 on the anchor cell and subframes 609 on the supplementary cell, and may receive HS-PDSCH on subframes 607 and 611, respectively.
[0051] The DRX period applied to the supplementary and anchor carrier may be the same. Alternatively, a different independent DRX period may be applied, or the DRX period for the supplementary carrier may be an integer multiple of the anchor carrier DRX period. The initiation of the DRX period is aligned with the DRX period of the anchor cell (perfectly aligned or aligned with an integer multiple of the DRX cycle as described above), but the duration may be different. Alternatively, the DRX period of the anchor carrier may be an integer multiple of the DRX period of the supplementary carrier.
[0052] The WTRU DTX pattern may be aligned with the overlapping period of both anchor and supplementary DRX cycle. This will allow the WTRU to fully turn off the radio on all carriers and both uplink and downlink, thus optimizing battery life. Alternatively, the DTX period may be aligned with the DRX period of the anchor cell or the supplementary cell.
[0053] Embodiments for DRX and/or DTX activation and de-activations are disclosed hereafter. When data is received on the supplementary carrier, the WTRU gets out of DRX to listen to subsequent HS-SCCH for a period of Inactivity_Threshold_for_UE_DRX_cycle. In the context of dual cell HSDPA, the HS-SCCH may be received on either one of the two downlink carriers. In the following description, a data transmission may include, but is not limited to, the HS-SCCH and HS-PDSCH, but fractional dedicated physical channel (F-DPCH) and HS-SCCH orders may not be considered as data transmissions. [0054] In accordance with one embodiment, the DRX activation and deactivation are totally independent on each downlink carrier. If data is received on the supplementary carrier, the WTRU monitors the supplementary carrier for HS-SCCH (or HS-PDSCH) for the pre-configured period of time. The DRX pattern on the anchor carrier may be maintained as if no data has been received at the WTRU. The same scheme is applied if data is received on the anchor carrier.
[0055] Figure 7 shows an example DRX de-activation on the anchor carrier after receiving data on the anchor carrier. In the example of Figure 7, the DRX patterns for the anchor carrier and the supplementary carrier are aligned with 2 ms TTI and UE_DRX_cycle=4. The top rows 701 and 702 are Node B transmissions on the anchor cell and the supplementary cell, respectively. The bottom rows 703 and 704 show DRX patterns of the WTRU on the anchor cell and the supplementary cell, respectively. The WTRU listens to an HS-SCCH on subframes 707 and 709 on both anchor and supplementary carriers in accordance with the configured DRX pattern. The Node B transmits an HS-SCCH via the anchor cell on subframes 705 and 706. Once the WTRU receives an HS-SCCH on the subframe 705, the WTRU deactivates the DRX on the anchor cell and starts monitoring on the anchor cell for Inactivity _Threshold_for_UE_DRX_cycle subframes, (i.e., subframes 708) from the last transmission 706 on the anchor cell. The WTRU monitors an HS-SCCH on the supplementary cell in accordance with the normal DRX pattern, (i.e., monitors subframes 709). [0056] Alternatively, the DRX patterns of the anchor and supplementary carriers may be linked together. Figure 8 shows an example DRX de-activation on the anchor carrier after receiving data on the anchor carrier in accordance with this alternative. In the example of Figure 8, the DRX patterns for the anchor carrier and the supplementary carrier are aligned with 2 ms TTI and UE_DRX_cycle=4. The top rows 801 and 802 are Node B transmissions on the anchor cell and the supplementary cell, respectively. The bottom rows 803 and 804 show DRX patterns of the WTRU on the anchor cell and the supplementary cell, respectively. The WTRU listens to an HS-SCCH on subframes 807 and 809 on both anchor and supplementary carriers in accordance with the configured DRX pattern. The Node B transmits an HS-SCCH via the anchor cell on subframes 805 and 806. Once the WTRU receives an HS-SCCH on the subframe 805, the WTRU deactivates the DRX on both the anchor cell and the supplementary cell and starts monitoring on the anchor cell and the supplementary cell for Inactivity _Threshold_for_UE_DRX_cycle subframes, (i.e., subframes 808 and 810) from the last transmission 806 on the anchor cell. [0057] Alternatively, when data is received on the supplementary carrier, the WTRU monitors both supplementary and anchor carriers for an HS-SCCH and/or an HS-PDSCH for the duration of
Inactivity _Threshold_for_UE_DRX_cycle, but when the WTRU receives data on the anchor carrier, DRX may be maintained on the supplementary carrier. [0058] These different mechanisms may be configured by the network using L3 signaling or predefined in the WTRU.
[0059] Embodiments for HS-PDSCH carrier indication are described hereinafter. In the case where the HS-SCCH is transmitted only one of the two carriers (preferably on the anchor carrier), an additional indication needs to be provided to indicate on which carrier to listen to for the associated HS-PDSCH. It should be noted that the embodiments described below are applicable to HS- SCCH scheduling for data transmissions over the HS-PDSCH or for HS-SCCH orders, wherein the WTRU does not need to monitor the HS-PDSCH after decoding its HS-DSCH radio network temporary identity (H-RNTI) on the HS- SCCH.
[0060] In accordance with one embodiment, the carrier for which the
WTRU needs to monitor for the HS-PDSCH or the HS-SCCH is linked directly to the HS-SCCH channelization code. This may be achieved by adding an information element (IE) indicating the carrier (anchor or supplementary) in the HS-SCCH Info information element (IE) as defined in 3GPP TS 25.331 V.8.5.0 section 10.3.6.36a. For example, a new row may be added to the HS-SCCH Info IE as shown in Table 1. The newly added item for indicating the downlink carrier is underlined in Table 1.
Figure imgf000014_0001
Table 1
[0061] Alternatively, each carrier is assigned a distinct H-RNTI (one for anchor charier and the other for supplementary carrier). The WTRU monitors the HS-SCCH for both H-RNTIs. If the H-RNTI of the anchor carrier is decoded on the HS-SCCH the WTRU knows that the scheduling is applicable to the anchor carrier and if the H-RNTI of the supplementary carrier is decoded on the HS-SCCH the WTRU knows that the scheduling is applicable to the supplementary carrier.
[0062] Alternatively, the carrier for the associated HS-PDSCH may be explicitly indicated in the associated HS-SCCH. The carrier information must be carried on the first part of the HS-SCCH as the WTRU needs this information to start buffering the HS-PDSCH. The carrier indication bit, Xd, may be included as part of the conventional channelization code set bits in the HS-SCCH. This may be achieved by reducing the channelization code scheduling flexibility at the expense of carrier flexibility. A WTRU configured for DC-HSDPA operations would automatically re-interpret the channelization code set bits of the HS- SCCH according to a new definition to determine the carrier indication, the channelization code offset and the number of HS-PDSCH codes in the associated data transmission.
[0063] Alternatively, a new HS-SCCH type may be defined, where the first part contains an additional bit for carrier indication. For example, when the WTRU is not configured for MIMO operations, the new HS-SCCH type may include the following information in its part 1:
- Channelization-code- set information (7 bits): xCcs,i> Xccs,2, ..., Xccs,7
- Modulation scheme information (1 bit): xms,i
- Carrier indication information (1 bit): xci
[0064] Similarly, when the WTRU is configured for MIMO operations, the new HS-SCCH type may include the following information in its part 1:
- Channelization-code- set information (7 bits): xCcs,i> Xccs,2, ..., Xccs,7
- Modulation scheme and number of transport blocks information (3
Figure imgf000015_0001
- Precoding weight information (2 bits): xpwipb,i> xPwiPb,2
- Carrier indication information (1 bit): xci [0065] For example, the carrier indication bit may be defined such that when Xci =0, the associated HS-PDSCH is sent on the anchor carrier, otherwise the associated HS-PDSCH is sent on the supplementary carrier. It is possible for both cases to re-use similar channel coding mechanism as the conventional one for the HS-SCCH part 1 by simply defining new rate matching parameters. [0066] In accordance with another embodiment, the WTRU determines whether it should decode data on the anchor carrier or on the supplementary carrier based on the timing of the HS-SCCH reception on either the anchor carrier or the supplementary carrier.
[0067] In case that staggered DRX patterns are used for the anchor and supplementary carriers, the indication is naturally based on the same criteria (formula) as the ones used to determine whether the WTRU should attempt reception on one of the carriers. This means that the HS-SCCH points to the anchor carrier if it is received at a time instant where reception on the anchor carrier is possible according to the DRX pattern, and on the supplementary carrier if it is received at a time instant where reception on the supplementary carrier is possible according to the DRX pattern. In either case the HS-SCCH may be transmitted on either the anchor carrier or the supplementary carrier, but no explicit indication of which carrier should be listened to has to be provided in the HS-SCCH itself.
[0068] Alternatively, there may be a distinct pattern for the reception of an
HS-PDSCH on the anchor carrier or supplementary carrier. For example, the WTRU may decode the HS-PDSCH on the anchor carrier if the HS-SCCH is received on the set of subframes whose radio frame number CFN_Anchor and subframe number S_Anchor satisfy the following equation:
((5xCFN_Anchor - Anchor_Offset + S_Anchor) MOD 2) = 0. Equation (6) The WTRU decodes the HS-PDSCH on the supplementary carrier in all other subframes.
[0069] If this embodiment of signaling the downlink carrier to decode an
HS-PDSCH from is used and staggered DRX patterns are used, the WTRU may need to receive the HS-SCCH in two consecutive TTIs starting from the sub- frames defined by the DRX reception pattern of either carrier. [0070] Embodiments for fast supplementary carrier activation and deactivation are disclosed hereafter. The activation and de-activation of the supplementary carrier is performed by using Ll or L2 signaling. [0071] In accordance with one embodiment, the network transmits an Ll signal to indicate to the WTRU that it should apply continuous reception (effectively de-activate DRX) to the supplementary carrier. This may be achieved by using a new HS-SCCH order or a new type of Ll message. The new HS-SCCH order or Ll message may be transmitted on either the anchor carrier or supplementary carrier. Upon reception of this signal from the network, the WTRU is allowed to start or stop monitoring the supplementary carrier based on the HS-SCCH order or Ll message, (e.g., supplementary carrier activation for '1' and supplementary carrier deactivation for O').
[0072] Alternatively, the WTRU may autonomously disable monitoring the supplementary carrier, (i.e., HS-SCCH and/or HS-DPSCH on the supplementary carrier), upon expiration of an inactivity timer. More specifically, if no downlink data is received for a configured amount of time in the supplementary cell or optionally in both anchor and supplementary cells, the WTRU may disable monitoring on the supplementary cell.
[0073] The network may transmit an HS-SCCH order or Ll signal to the
WTRU to indicate activation of the supplementary carrier. This may be achieved by using a new HS-SCCH order or a new type of Ll message on the anchor carrier. Alternatively, the WTRU may autonomously enable monitoring of the supplementary carrier if downlink traffic is received. Optionally, the criteria to enable monitoring of the supplementary carrier may be dependent on the type of traffic being received or the amount of data. Upon reception of this signal from the network, the WTRU may start monitoring the supplementary carrier using the same configuration as before de-activation order is received, or stop monitoring the supplementary carrier. In particular, the DRX status for the supplementary carrier may be restored to the state it was before the deactivation order was received.
[0074] Alternatively, upon activation or re-activation of the supplementary carrier, the DRX for the supplementary carrier may be always disabled (or alternatively always enabled). Alternatively, the DRX state of the supplementary carrier upon activation or re-activation may be configured by higher layer signaling.
[0075] Alternately, upon activation or re-activation of the supplementary carrier, the WTRU may start using the same DRX pattern as the anchor cell, (aligned or staggered). For instance, if the anchor cell has DRX active at the time of activation of the supplementary cell, the WTRU may also initiate DRX using the same reception patterns. If the anchor cell is in CRX the supplementary carrier may also be in CRX.
[0076] The supplementary carrier activation and de-activation may also be considered as a dual (or multi) DRX scheme. The fist DRX cycle comprises DRX patterns being applied to both carriers using one of the embodiments applied above, while the second DRX cycle comprises disabling the supplementary carrier and continued a DRX pattern or continuous reception on the anchor carrier. This is a 2-stage DRX mechanism. The first stage comprises going for CRX to DRX and the second stage comprises going from DRX to inactive. The transition between the DRX cycles may depend on one or a combination of the following options:
(1) Inactivity timers;
(2) HS-SCCH order or Ll signaling as described above;
(3) RRC signaling;
(4) Reception of downlink traffic, (i.e., HS-SCCH or HS-DPSCH), in one of the carriers; and
(5) Reception of downlink traffic, (i.e., HS-SCCH or HS-DPSCH), in one of the carriers indicating scheduling information on the other carrier. [0077] Once the WTRU is in the second DRX cycle, the WTRU may transition to the first DRX cycle (where both carriers are in DRX) if an HS-SCCH order is received or if downlink traffic is received. Alternatively, the WTRU may transition directly to continuous transmission from the second DRX cycle. [0078] Alternately, the WTRU may disable and enable monitoring of the downlink anchor cell channels, (i.e., HS-SCCH and/or HS-DPSCH), and listens to the supplementary cell using a configured DRX cycle or continuous reception in supplementary cell. The options described above, to enable/disable monitoring of the supplementary cell are also applicable to this alternative. [0079] Embodiments for improving the power-saving at the WTRU are disclosed hereafter. A new set of rules and signaling is defined for fast activation and de-activation of DRX/DTX for a WTRU in a DC-HSDPA mode. Activation and de-activation may be performed separately for each downlink carrier. This may be achieved by signaling explicitly the activation/deactivation order to the WTRU over separate HS-SCCH orders for each carrier. This flexibility results in additional power consumption, signaling load, and increased code space usage on the downlink.
[0080] In accordance with one embodiment, a dual DTX/DRX state for a
DC-HSDPA-capable WTRU is defined by the combination of the status of the supplementary carrier (active or not), the DRX state (active or not active) of the anchor and supplementary carriers, and the DTX status (active or not active) on the uplink carrier. A DC-HSDPA-capable WTRU may be in a number of dual DTX/DRX states. Some transitions from one dual DTX/DRX state to another may be more prevalent than others. As such, the signaling cost associated to these should be minimized.
[0081] The following set of signaling mechanisms and rules are provided to reduce the signaling load associated to the prevalent state transitions. They may be used in any order or in any combinations.
[0082] Rule 1: When the supplementary carrier is in the active state and when DRX is explicitly activated at the anchor carrier (via a regular Release- 7 HS-SCCH order), DRX is implicitly activated on the supplementary carrier. This rule allows reducing the number of HS-SCCH orders to put the WTRU in DRX for both carriers in periods of low downlink activity.
[0083] Rule 2: Upon explicit activation of the supplementary carrier, (e.g., via an HS-SCCH order), the DRX on both the anchor and supplementary carriers is implicitly deactivated. Optionally, the DTX on the UL anchor carrier (and optionally on the UL supplementary carrier, if it exists) is also implicitly deactivated. While this could be achieved via multiple HS-SCCH orders, this new rule allows the network to quickly turn the WTRU in a very active state in a period of high downlink activity.
[0084] Rule 3: When the supplementary carrier is deactivated explicitly
(e.g., using an HS-SCCH order), DRX is implicitly enabled at the anchor carrier. Optionally, DTX may also be implicitly enabled at the UL anchor carrier. This rule allows the network to move a WTRU into battery saving mode faster in period of low activity.
[0085] Rule 4: When DRX is explicitly disabled (e.g., via an HS-SCCH order) on the supplementary carrier, the DRX on the anchor carrier is implicitly disabled. Optionally, if a secondary UL carrier exists, when DTX is explicitly disabled on the secondary UL carrier, DTX is implicitly disabled on the UL anchor carrier. This rule allows the network to move a WTRU into battery saving mode faster in period of low activity.
[0086] Figure 9 shows how using single supplementary carrier activation and deactivation orders may be used in conjunction with Rule 2 and Rule 3 to achieve transitions from low to high power states, and vice versa. In Figure 9, four states are defined: state 1 (supplementary cell active, DRX both cells active), state 2 (supplementary cell active, DRX both cells not active), state 3 (supplementary cell not active, DRX both cells active), and state 4 (supplementary cell not active, DRX both cells not active). Upon receipt of supplementary cell activation order (step 902), the WTRU transitions from state 3 to state 2 and activates the supplementary cell and deactivates DRX for both cells. Upon receipt of supplementary cell deactivation order (step 904), the WTRU transitions from state 3 to state 2 and deactivates the supplementary cell and activates the DRX for both cells.
[0087] Alternatively, some of the above implicit rules may be implemented using explicit signaling. For instance, Rule 2 and Rule 3 may also be achieved by using explicit signaling. One possible way to do this using a single HS-SCCH order by using reserved bits in the conventional HS-SCCH order bits for activation and deactivation of the supplementary cell and indicating activation and deactivation of DRX (for both anchor and supplementary carriers) and optionally DTX (on the UL carrier), respectively.
[0088] For example, the first bit of the three HS-SCCH order bits may be used to indicate DRX activation and deactivation of the anchor and supplementary cells and the second bit of the three HS-SCCH order bits may be used to indicate DTX activation and deactivation. For example, if the first bit is set to O', the HS-SCCH order is a DRX de-activation order for both the anchor and supplementary cells. If the first bit is set to '1', the HS-SCCH order is a DRX activation order for both the anchor and supplementary cells. If the second bit is set to O', the HS-SCCH order is a DTX de-activation order. If the second bit is set to '1', the HS-SCCH order is a DTX activation order. If a supplementary UL carrier exists, the DTX may also be applied to both anchor and supplementary uplink carriers.
[0089] In DC-HSDPA, two channel quality indicator (CQI) feedback cycle values must be given to the WTRU: one for the anchor cell and another for the supplementary cell. These values may be explicitly provided to the WTRU by the network via RRC signaling: one for the anchor carrier (denoted by variable k) and one for the supplementary carrier (denoted by variable ks). This allows the CQI reporting rate to be adjusted by the network, for example to optimize with respect to different DRX cycles.
[0090] In accordance with one embodiment, the CQI feedback cycle duration for the supplementary carrier may implicitly be determined by the WTRU. The CQI feedback cycle for the supplementary carrier may be identical to the CQI feedback cycle of the anchor carrier, (i.e., ks = k). Alternatively, for the case where the DRX cycle for the supplementary carrier is a factor (M) of the DRX cycle of the anchor carrier, the CQI feedback cycle for the supplementary carrier may be given by the same factor times the CQI feedback cycle for the anchor carrier, (i.e., ks = Mxk). The value M may be signaled or pre-configured in the specifications, (e.g., M=2). This approach may be combined to other embodiments disclosed above, (e.g., time-offset CQI reporting), to achieve maximum flexibility.
[0091] WTRU actions when activating/de-activating the supplementary cell via an HS-SCCH order are described. Upon de-activation of the supplementary cell via an HS-SCCH order, the WTRU may flush the HARQ buffers associated to the supplementary cell, and/or instruct the medium access control (MAC) entity that the next received HARQ transmission (upon re-activation of the supplementary cell) for each configured HARQ processes associated to the supplementary cell should be considered as a first transmission. [0092] There are several methods to carry out the above actions. In one approach, upon reception of the supplementary cell de-activation order, the physical layer may indicate to the RRC layer that the supplementary cell is being de-activated. In turn, the RRC layer may instruct the MAC layer that the next HARQ transmission for all configured HARQ processes associated to the supplementary cell should be considered as a first HARQ transmission. The RRC layer may also instruct the MAC layer to flush the HARQ buffers associated to the supplementary cell. [0093] Embodiments.
[0094] 1. A method implemented in a WTRU for performing DRX in
DC-HSDPA.
[0095] 2. The method of embodiment 1 comprising receiving a message for activating DRX for at least one of an anchor carrier and a supplementary carrier. [0096] 3. The method of embodiment 2 comprising applying a same
DRX pattern to the anchor carrier and the supplementary carrier upon reception of the message.
[0097] 4. The method as in any one of embodiments 2-3, wherein the message is received via an HS-SCCH order.
[0098] 5. The method as in any one of embodiments 2-4, further comprising de-activating DRX on both the anchor carrier and the supplementary carrier on a condition that data is received via any one of the anchor carrier and the supplementary carrier.
[0099] 6. The method as in any one of embodiments 2-5, further comprising receiving a second message for de-activating DRX for at least one of an anchor carrier and a supplementary carrier.
[00100] 7. The method of embodiment 6 comprising de-activating DRX on both the anchor carrier and supplementary carrier.
[00101] 8. The method of claim 4 wherein the second message is received via a high speed shared control channel (HS-SCCH) order.
[00102] 9. A method implemented in a WTRU for simultaneously receiving on two carriers in DC-HSDPA.
[00103] 10. The method of embodiment 9 comprising receiving a physical layer signal for activating a supplementary carrier via an anchor carrier.
[00104] 11. The method of embodiment 10 comprising activating the supplementary carrier upon receipt of the physical layer signal.
[00105] 12. The method as in any one of embodiments 10-11, wherein the physical layer signal is an HS-SCCH order.
[00106] 13. The method as in any one of embodiments 10-13, further comprising applying a same DRX pattern to both an anchor carrier and the supplementary carrier upon activation of the supplementary carrier.
[00107] 14. The method as in any one of embodiments 10-14, further comprising receiving a second physical layer signal for deactivating the supplementary carrier via one of the anchor carrier and the supplementary carrier.
[00108] 15. The method of embodiment 14 comprising de-activating the supplementary carrier upon receipt of the second physical layer signal. [00109] 16. The as in any one of embodiments 14-15, 9 further comprising flushing an HARQ buffer associated with the supplementary carrier upon deactivation of the supplementary carrier.
[00110] 17. The method as in any one of embodiments 14-15, further comprising processing data received via the supplementary carrier as new data after re-activating the supplementary carrier.
[00111] 18. A WTRU configured to perform DRX in DC-HSDPA.
[00112] 19. The WTRU of embodiment 18 comprising a receiver configured to receive a message for activating DRX for at least one of an anchor carrier and a supplementary carrier.
[00113] 20. The WTRU of embodiment 19 comprising a controller configured to apply a same DRX pattern to the anchor carrier and the supplementary carrier upon reception of the message.
[00114] 21. The WTRU as in any one of embodiments 19-20, wherein the receiver is configured to receive the message via an HS-SCCH order. [00115] 22. The WTRU as in any one of embodiments 20-21, wherein the controller is configured to de-activate DRX on both the anchor carrier and the supplementary carrier on a condition that data is received via any one of the anchor carrier and the supplementary carrier.
[00116] 23. The WTRU as in any one of embodiments 20-22, the controller is configured to de-activate DRX on both the anchor carrier and supplementary carrier upon receipt of a second message for de-activating DRX for at least one of an anchor carrier and a supplementary carrier.
[00117] 24. The WTRU of embodiment 23 wherein the second message is received via an HS-SCCH order. [00118] 25. A WTRU configured to receive on two carriers simultaneously in DC-HSDPA.
[00119] 26. The WTRU of embodiment 25 comprising a receiver configured to receive a physical layer signal for activating a supplementary carrier via an anchor carrier.
[00120] 27. The WTRU of embodiment 26 comprising a controller configured to activate the supplementary carrier upon receipt of the physical layer signal.
[00121] 28. The WTRU as in any one of embodiments 26-27, wherein the physical layer signal is an HS-SCCH order.
[00122] 29. The WTRU as in any one of embodiments 27-28, wherein the controller is configured to apply a same DRX pattern to both an anchor carrier and the supplementary carrier upon activation of the supplementary carrier. [00123] 30. The WTRU as in any one of embodiments 27-29, wherein the controller is configured to de-activate the supplementary carrier upon receipt of a second physical layer signal for deactivating the supplementary carrier via one of the anchor carrier and the supplementary carrier.
[00124] 31. The WTRU of embodiment 30 wherein the controller is configured to flush an HARQ buffer associated with the supplementary carrier upon de-activation of the supplementary carrier.
[00125] 32. The WTRU of embodiment 30 wherein the controller is configured to process data received via the supplementary carrier as new data after re-activating the supplementary carrier. [00126] 33. A Node B for supporting DRX in DC-HSDPA.
[00127] 34. The Node B of embodiment 33 comprising a transmitter configured to transmit an HS-SCCH order.
[00128] 35. The Node B of embodiment 34 comprising a controller configured to send an HS-SCCH order for activating DRX in a WTRU with a same DRX pattern for the anchor carrier and the supplementary carrier. [00129] 36. A Node B for supporting DC-HSDPA operations. [00130] 37. The Node B of embodiment 36 comprising a transmitter configured to transmit a physical layer signal.
[00131] 38. The Node B of embodiment 37 comprising a controller configured to send a first physical layer signal via an anchor carrier for activating a supplementary carrier for a wireless transmit/receive unit and send a second physical layer signal for de-activating the supplementary carrier for the WTRU via one of the anchor carrier and the supplementary carrier. [00132] 39. A method implemented in a WTRU for simultaneously receiving on two carriers in DC-HSDPA comprising activating a supplementary carrier.
[00133] 40. The method of embodiment 39 comprising receiving a physical layer signal for de-activating the supplementary carrier via one of an anchor carrier and the supplementary carrier.
[00134] 41. The method of embodiment 40 comprising de-activating the supplementary carrier upon receipt of the physical layer signal. [00135] 42. A WTRU configured to receive on two carriers simultaneously in DC-HSDPA comprising a receiver configured to receive a physical layer signal for de-activating a supplementary carrier via one of an anchor carrier and the supplementary carrier.
[00136] 43. The WTRU of embodiment 42 comprising a controller configured to de-activate the supplementary carrier upon receipt of the physical layer signal.
[00137] Although features and elements are described above in particular combinations, each feature or element can be used alone without the other features and elements or in various combinations with or without other features and elements. The methods or flow charts provided herein may be implemented in a computer program, software, or firmware incorporated in a computer- readable storage medium for execution by a general purpose computer or a processor. Examples of computer-readable storage mediums include a read only memory (ROM), a random access memory (RAM), a register, cache memory, semiconductor memory devices, magnetic media such as internal hard disks and removable disks, magneto-optical media, and optical media such as CD-ROM disks, and digital versatile disks (DVDs).
[00138] Suitable processors include, by way of example, a general purpose processor, a special purpose processor, a conventional processor, a digital signal processor (DSP), a plurality of microprocessors, one or more microprocessors in association with a DSP core, a controller, a microcontroller, Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) circuits, any other type of integrated circuit (IC), and/or a state machine. [00139] A processor in association with software may be used to implement a radio frequency transceiver for use in a wireless transmit receive unit (WTRU), user equipment (UE), terminal, base station, radio network controller (RNC), or any host computer. The WTRU may be used in conjunction with modules, implemented in hardware and/or software, such as a camera, a video camera module, a videophone, a speakerphone, a vibration device, a speaker, a microphone, a television transceiver, a hands free headset, a keyboard, a Bluetooth® module, a frequency modulated (FM) radio unit, a liquid crystal display (LCD) display unit, an organic light- emitting diode (OLED) display unit, a digital music player, a media player, a video game player module, an Internet browser, and/or any wireless local area network (WLAN) or Ultra Wide Band (UWB) module.

Claims

CLAIMS What is claimed is:
1. A method implemented in a wireless transmit/receive unit (WTRU) for performing discontinuous reception (DRX) in dual cell high speed downlink packet access (DC-HSDPA), the method comprising: receiving a message for activating DRX for at least one of an anchor carrier and a supplementary carrier; and applying a same DRX pattern to the anchor carrier and the supplementary carrier upon reception of the message.
2. The method of claim 1 wherein the message is received via a high speed shared control channel (HS-SCCH) order.
3. The method of claim 1 further comprising: de-activating DRX on both the anchor carrier and the supplementary carrier on a condition that data is received via any one of the anchor carrier and the supplementary carrier.
4. The method of claim 1 further comprising: receiving a second message for de-activating DRX for at least one of an anchor carrier and a supplementary carrier; and de-activating DRX on both the anchor carrier and supplementary carrier.
5. The method of claim 4 wherein the second message is received via a high speed shared control channel (HS-SCCH) order.
6. A method implemented in a wireless transmit/receive unit (WTRU) for simultaneously receiving on two carriers in dual cell high speed downlink packet access (DC-HSDPA), the method comprising: receiving a physical layer signal for activating a supplementary carrier via an anchor carrier; and activating the supplementary carrier upon receipt of the physical layer signal.
7. The method of claim 6 wherein the physical layer signal is a high speed shared control channel (HS-SCCH) order.
8. The method of claim 6 further comprising: applying a same DRX pattern to both an anchor carrier and the supplementary carrier upon activation of the supplementary carrier.
9. The method of claim 6 further comprising: receiving a second physical layer signal for deactivating the supplementary carrier via one of the anchor carrier and the supplementary carrier; and de-activating the supplementary carrier upon receipt of the second physical layer signal.
10. The method of claim 9 further comprising: flushing a hybrid automatic repeat request (HARQ) buffer associated with the supplementary carrier upon de-activation of the supplementary carrier.
11. The method of claim 9 further comprising: receiving a third physical layer signal for re-activating the supplementary carrier; activating the supplementary carrier; and processing data received via the supplementary carrier as new data after re-activating the supplementary carrier.
12. A method implemented in a wireless transmit/receive unit (WTRU) for simultaneously receiving on two carriers in dual cell high speed downlink packet access (DC-HSDPA), the method comprising: activating a supplementary carrier; and receiving a physical layer signal for de-activating the supplementary carrier via one of an anchor carrier and the supplementary carrier; and de-activating the supplementary carrier upon receipt of the physical layer signal.
13. A wireless transmit/receive unit (WTRU) configured to perform discontinuous reception (DRX) in dual cell high speed downlink packet access (DC-HSDPA), the WTRU comprising: a receiver configured to receive a message for activating DRX for at least one of an anchor carrier and a supplementary carrier; and a controller configured to apply a same DRX pattern to the anchor carrier and the supplementary carrier upon reception of the message.
14. The WTRU of claim 13 wherein the receiver is configured to receive the message via a high speed shared control channel (HS-SCCH) order.
15. The WTRU of claim 13 wherein the controller is configured to deactivate DRX on both the anchor carrier and the supplementary carrier on a condition that data is received via any one of the anchor carrier and the supplementary carrier.
16. The WTRU of claim 13 the controller is configured to de-activate DRX on both the anchor carrier and supplementary carrier upon receipt of a second message for de-activating DRX for at least one of an anchor carrier and a supplementary carrier.
17. The WTRU of claim 16 wherein the second message is received via a high speed shared control channel (HS-SCCH) order.
18. A wireless transmit/receive unit (WTRU) configured to receive on two carriers simultaneously in dual cell high speed downlink packet access (DC- HSDPA), the WTRU comprising: a receiver configured to receive a physical layer signal for activating a supplementary carrier via an anchor carrier; and a controller configured to activate the supplementary carrier upon receipt of the physical layer signal.
19. The WTRU of claim 18 wherein the physical layer signal is a high speed shared control channel (HS-SCCH) order.
20. The WTRU of claim 18 wherein the controller is configured to apply a same DRX pattern to both an anchor carrier and the supplementary carrier upon activation of the supplementary carrier.
21. The WTRU of claim 18 wherein the controller is configured to deactivate the supplementary carrier upon receipt of a second physical layer signal for deactivating the supplementary carrier via one of the anchor carrier and the supplementary carrier.
22. The WTRU of claim 21 wherein the controller is configured to flush a hybrid automatic repeat request (HARQ) buffer associated with the supplementary carrier upon de-activation of the supplementary carrier.
23. The WTRU of claim 21 wherein the controller is configured to reactivate the supplementary carrier upon receipt of a third physical layer signal for re-activating the supplementary carrier and process data received via the supplementary carrier as new data after re-activating the supplementary carrier.
24. A wireless transmit/receive unit (WTRU) configured to receive on two carriers simultaneously in dual cell high speed downlink packet access (DC- HSDPA), the WTRU comprising: a receiver configured to receive a physical layer signal for de-activating a supplementary carrier via one of an anchor carrier and the supplementary carrier; and a controller configured to de-activate the supplementary carrier upon receipt of the physical layer signal.
25. A Node B for supporting discontinuous reception (DRX) in dual cell high speed downlink packet access (DC-HSDPA), the Node B comprising: a transmitter configured to transmit a high speed shared control channel (HS-SCCH) order; and a controller configured to send an HS-SCCH order for activating DRX in a wireless transmit/receive unit (WTRU) with a same DRX pattern for the anchor carrier and the supplementary carrier.
26. A Node B for supporting dual cell high speed downlink packet access (DC-HSDPA) operations, the Node B comprising: a transmitter configured to transmit a physical layer signal; and a controller configured to send a first physical layer signal via an anchor carrier for activating a supplementary carrier for a wireless transmit/receive unit (WTRU) and send a second physical layer signal for de-activating the supplementary carrier for a WTRU via one of the anchor carrier and the supplementary carrier.
PCT/US2009/041691 2008-04-25 2009-04-24 Method and apparatus for simultaneously receiving on two carriers and performing discontinuous transmission and reception in dual cell high speed downlink packet access WO2009132290A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
KR1020147011050A KR101554444B1 (en) 2008-04-25 2009-04-24 Method and apparatus for simultaneously receiving on two carriers and performing discontinuous transmission and reception in dual cell high speed downlink packet access
CA2722488A CA2722488C (en) 2008-04-25 2009-04-24 Method and apparatus for simultaneously receiving on two carriers and performing discontinuous transmission and reception in dual cell high speed downlink packet access
CN200980114683.0A CN102017727B (en) 2008-04-25 2009-04-24 Method and apparatus for simultaneously receiving on two carriers and performing discontinuous transmission and reception in dual cell high speed downlink packet access
JP2011506484A JP5291186B2 (en) 2008-04-25 2009-04-24 Method and apparatus for performing DTX and DRX by simultaneously receiving on two carriers in DC-HSDPA
EP09735925.1A EP2292053B1 (en) 2008-04-25 2009-04-24 Method and apparatus for simultaneously receiving on two carriers and performing discontinuous transmission and reception in dual cell high speed downlink packet access

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US4787808P 2008-04-25 2008-04-25
US61/047,878 2008-04-25
US8505108P 2008-07-31 2008-07-31
US61/085,051 2008-07-31
US11314908P 2008-11-10 2008-11-10
US61/113,149 2008-11-10

Publications (3)

Publication Number Publication Date
WO2009132290A2 true WO2009132290A2 (en) 2009-10-29
WO2009132290A3 WO2009132290A3 (en) 2010-01-21
WO2009132290A8 WO2009132290A8 (en) 2010-04-15

Family

ID=40972933

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/041691 WO2009132290A2 (en) 2008-04-25 2009-04-24 Method and apparatus for simultaneously receiving on two carriers and performing discontinuous transmission and reception in dual cell high speed downlink packet access

Country Status (9)

Country Link
US (4) US8929301B2 (en)
EP (2) EP3288318A1 (en)
JP (4) JP5291186B2 (en)
KR (3) KR101554384B1 (en)
CN (4) CN104038992B (en)
AR (1) AR071599A1 (en)
CA (1) CA2722488C (en)
TW (3) TWI538541B (en)
WO (1) WO2009132290A2 (en)

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101931433A (en) * 2010-08-06 2010-12-29 中兴通讯股份有限公司 Multipath searching method and multipath searcher
GB2474960A (en) * 2009-10-29 2011-05-04 Lg Electronics Inc HSPA system using a plurality of uplink frequencies
WO2011072721A1 (en) * 2009-12-15 2011-06-23 Nokia Corporation Method, mobile station, base station and computer program product to control the activation of a wireless carrier
WO2011086533A1 (en) * 2010-01-15 2011-07-21 Nokia Corporation Harq acknowledgment channel coding for 4-carrier hsdpa mimo
WO2011098024A1 (en) * 2010-02-11 2011-08-18 华为技术有限公司 Method and apparatus for controlling carrier state in multi-carrier system
WO2011123791A1 (en) * 2010-04-02 2011-10-06 Interdigital Patent Holdings, Inc. Dynamic control channel monitoring set for multi-carrier operations
US20110249656A1 (en) * 2010-02-12 2011-10-13 Interdigital Patent Holdings, Inc. Sending Feedback for Multiple Downlink Carriers
CN102291770A (en) * 2010-06-21 2011-12-21 上海贝尔股份有限公司 Method and device for optimizing user plane operation in communication system based on carrier aggregation
WO2012044694A1 (en) * 2010-10-01 2012-04-05 Interdigital Patent Holdings, Inc. Method for coordinating discontinuous reception, drx
CN102448152A (en) * 2010-10-13 2012-05-09 中兴通讯股份有限公司 Energy-saving control method and system of base station
WO2012065915A1 (en) * 2010-11-15 2012-05-24 Research In Motion Limited Managing wireless communications
WO2012139272A1 (en) * 2011-04-11 2012-10-18 Renesas Mobile Corporation Method and apparatus for providing for discontinuous reception via cells having different time division duplex subframe configurations
EP2620035A1 (en) * 2010-09-20 2013-07-31 Nokia Siemens Networks Oy Discontinuous reception across transmissions on different radio access technologies
EP2627148A1 (en) * 2010-11-08 2013-08-14 Huawei Technologies Co., Ltd. Method and device for controlling channel transmission state
AU2009271334B2 (en) * 2008-06-23 2013-10-31 Qualcomm Incorporated Management of UE operation in a multi-carrier communication system
US8654691B2 (en) 2010-11-15 2014-02-18 Blackberry Limited Managing wireless communications
US8937876B2 (en) 2010-11-15 2015-01-20 Blackberry Limited Managing communications across a wireless network
JP2015516129A (en) * 2012-05-10 2015-06-04 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． Method for determining data boundaries, method for transmitting instruction information, and apparatus thereof
US9084261B2 (en) 2009-03-16 2015-07-14 Qualcomm Incorporated Discontinuous uplink transmission operation and interference avoidance for a multi-carrier system
EP2849367A4 (en) * 2012-05-09 2016-02-24 Samsung Electronics Co Ltd Method and apparatus for transceiving data using plurality of carriers in mobile communication system
EP2955943A4 (en) * 2013-03-19 2016-03-02 Huawei Tech Co Ltd Control information indication method and device
WO2016048228A1 (en) * 2014-09-26 2016-03-31 Telefonaktiebolaget Lm Ericsson (Publ) Cross-carrier indication signal in lbt systems
EP3235322A4 (en) * 2014-12-15 2018-07-18 Qualcomm Incorporated Dual active connections over single radio user equipment
US10194460B2 (en) 2014-02-27 2019-01-29 Huawei Technologies Co., Ltd. User equipment, network side device, and method for sending DPCCH
US10779349B2 (en) 2012-01-09 2020-09-15 Samsung Electronics Co., Ltd. Method and apparatus for logging information
US10791480B2 (en) 2012-05-21 2020-09-29 Samsung Electronics Co., Ltd. Method and device for transmitting and receiving data in mobile communication system
US10880702B1 (en) 2019-06-04 2020-12-29 Sprint Communications Company L.P. Data communications for user applications that are executing in a wireless user device
US10887919B2 (en) 2012-05-09 2021-01-05 Samsung Electronics Co., Ltd. Method and apparatus for transmitting and receiving data using plurality of carriers in mobile communication system
US10959172B2 (en) 2012-01-27 2021-03-23 Samsung Electronics Co., Ltd. Method and apparatus for transmitting and receiving data by using plurality of carriers in mobile communication systems
US11832229B2 (en) 2011-08-22 2023-11-28 Samsung Electronics Co., Ltd. Method and apparatus for supporting multiple frequency bands in mobile communication system

Families Citing this family (61)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8711773B2 (en) * 2008-09-05 2014-04-29 Blackberry Limited Multi-carrier operation for wireless systems
US8897234B2 (en) * 2005-09-07 2014-11-25 Huawei Technologies Co., Ltd. Method and apparatus for controlling carrier frequency in multi-carrier/cell system
CN104038992B (en) 2008-04-25 2017-09-22 交互数字专利控股公司 The method supported DC HSDPA node B and used in node B
KR101682034B1 (en) 2008-08-18 2016-12-05 삼성전자주식회사 Apparatus and method for using secondary frequency assignment optionnally in a wireless communication system using multiple band
EP2341741A4 (en) * 2008-09-22 2016-05-25 Ntt Docomo Inc Mobile station, radio base station, and mobile communication method
US8565153B2 (en) * 2009-05-19 2013-10-22 Qualcomm Incorporated Dynamic switching between MIMO and DC HSDPA
KR101119119B1 (en) * 2009-06-08 2012-03-16 엘지전자 주식회사 Communication method using a carrier aggregation and apparatus therefore
BR122018010324B1 (en) * 2009-06-15 2021-03-02 Guangdong Oppo Mobile Telecommunications Corp., Ltd method for transmitting control information corresponding to a carrier between a plurality of carriers and the network element
EP2443858A4 (en) * 2009-06-19 2017-01-11 Nokia Technologies Oy Method and apparatus for managing carrier measurements
KR20110052418A (en) 2009-11-11 2011-05-18 삼성전자주식회사 Apparatus and method for discontinuous reception in wireless communication system
CN102098735B (en) * 2009-12-09 2014-03-19 中兴通讯股份有限公司南京分公司 Optimization method and device for discontinuous reception on multi-carrier
US8817711B2 (en) * 2009-12-18 2014-08-26 Broadcom Corporation Method and system for concurrently locating systematic bits and parity bits in physical channel memory to increase HARQ processing speed in 3GPP CPC system
CN102111857B (en) * 2009-12-23 2015-11-25 华为技术有限公司 Method for handling carriers and subscriber equipment
JP5990464B2 (en) * 2010-01-08 2016-09-14 インターデイジタル パテント ホールディングス インコーポレイテッド Method and apparatus for performing discontinuous reception and / or discontinuous transmission for multi-carrier / multi-cell operation
KR101471344B1 (en) * 2010-01-08 2014-12-09 후지쯔 가부시끼가이샤 Method and apparatus for performing carrier management in carrier aggregation system
US8965455B2 (en) 2010-01-11 2015-02-24 Qualcomm Incorporated Apparatus and method for reducing energy consumption by cellular base stations
US9137757B2 (en) 2010-02-11 2015-09-15 Qualcomm Incorporated Method and apparatus for power control in high speed packet access (HSPA) networks
KR20110094760A (en) * 2010-02-17 2011-08-24 주식회사 팬택 Method and apparatus of discontinuous reception in wireless communication system using multiple component carrier, method and apparatus for transmitting activation/deactivation message therefore
JP4823371B2 (en) * 2010-03-30 2011-11-24 シャープ株式会社 Wireless communication system, mobile station apparatus, base station apparatus, wireless communication method, and integrated circuit
CN102215552A (en) * 2010-04-01 2011-10-12 中兴通讯股份有限公司 Method and device for receiving multi-carrier discontinuous scheduling
CN102215553A (en) * 2010-04-12 2011-10-12 中兴通讯股份有限公司 Processing method of carrier wave deactivation and user equipment (UE)
US20110280221A1 (en) * 2010-05-17 2011-11-17 Tom Chin Discontinuous Reception (DRX) For Multimode User Equipment (UE) Operation
EP2398285B1 (en) * 2010-06-18 2016-11-16 Alcatel Lucent Power saving
US8891356B2 (en) 2010-06-28 2014-11-18 Qualcomm Incorporated System and method for multi-point HSDPA communication utilizing a multi-link RLC sublayer
US8989140B2 (en) 2010-06-28 2015-03-24 Qualcomm Incorporated System and method for mobility in a multi-point HSDPA communication network
CN105553532B (en) 2010-07-19 2018-10-12 Lg电子株式会社 The method and apparatus of emission control information in a wireless communication system
DK2622779T3 (en) 2010-10-01 2015-04-27 Interdigital Patent Holdings Method and apparatus for transmitting pilot from multiple antennas
US8824307B2 (en) 2010-10-13 2014-09-02 Qualcomm Incorporated Communicating between user equipment (UE) and independent serving sectors in a wireless communications system
US8989004B2 (en) 2010-11-08 2015-03-24 Qualcomm Incorporated System and method for multi-point HSDPA communication utilizing a multi-link PDCP sublayer
US8675554B2 (en) * 2010-11-08 2014-03-18 Intel Corporation Wireless communication device and method for performing neighbor cell analysis during continuous packet connectivity mode
WO2012134219A2 (en) * 2011-03-31 2012-10-04 Lg Electronics Inc. Method and apparatus for monitoring downlink control channel
US8837304B2 (en) 2011-04-08 2014-09-16 Sharp Kabushiki Kaisha Devices for multi-group communications
US8737211B2 (en) 2011-08-03 2014-05-27 Qualcomm Incorporated Methods and apparatuses for network configuration of user equipment communication modes in multiflow systems
US9125098B2 (en) 2011-08-03 2015-09-01 Qualcomm Incorporated Method and apparatus for flow congestion control in multiflow networks
US8842641B2 (en) * 2011-08-12 2014-09-23 Telefonaktiebolaget L M Ericsson (Publ) RAKE resource multiplexing for enhanced uplink data services
WO2013060931A1 (en) 2011-10-24 2013-05-02 Nokia Corporation Apparatus and method for time domain icic with muting pattern comprising fixed and optional parts
US9007974B2 (en) * 2012-03-19 2015-04-14 Qualcomm Incorporated Method and apparatus for aligning downlink discontinuous reception patterns in multiflow HSDPA
EP2645808A1 (en) * 2012-03-26 2013-10-02 Alcatel Lucent Multi-flow network
US9603184B2 (en) * 2012-05-25 2017-03-21 Apple Inc. Tune back coordination with connected mode discontinuous receive
GB2505696A (en) * 2012-09-07 2014-03-12 Sony Corp Receiving a sleep indication signal at a communications device in the narrow band control channel of a virtual carrier
EP2900001B1 (en) 2012-09-21 2019-03-20 Mitsubishi Electric Corporation Wireless communication device, wireless communication system and wireless communication method
US9832788B2 (en) 2012-09-21 2017-11-28 Apple Inc. Detection of data scheduling activity for receiver selection
US20140269468A1 (en) * 2013-03-14 2014-09-18 Qualcomm Incorporated Systems and methods for wireless band switching
US9883454B2 (en) 2013-04-15 2018-01-30 Qualcomm Incorporated Feedback message alignment for multicarrier systems with flexible bandwidth carrier
WO2014190488A1 (en) * 2013-05-28 2014-12-04 华为技术有限公司 Discontinuous transmission method, user equipment, and network side device
US10779202B2 (en) * 2013-07-02 2020-09-15 Telefonaktiebolaget L M Ericsson (Publ) Controlling connection of an idle mode user equipment to a radio access network node
WO2015046923A1 (en) * 2013-09-27 2015-04-02 Itl, Inc. Method and apparatus for performing activation/deactivation of serving cell in wireless communication system supporting dual connectivity
CN104704898B (en) * 2013-09-27 2018-11-13 华为技术有限公司 Method, user equipment and the base station of communication
US20150092638A1 (en) * 2013-09-27 2015-04-02 Qualcomm Incorporated Discontinuous transmission timing for systems with flexible bandwidth carrier
US9271306B2 (en) 2013-09-27 2016-02-23 Qualcomm Incorporated Grant processing for flexible bandwidth carrier systems
US10075988B2 (en) * 2014-01-06 2018-09-11 Intel IP Corporation Discontinuous reception (DRX) alignment techniques for dual-connectivity architectures
MX2016014554A (en) * 2014-05-06 2017-06-30 Huawei Tech Co Ltd Channel boundary locating method, base station and user equipment.
US20160037577A1 (en) * 2014-07-30 2016-02-04 Qualcomm Incorporated Multicarrier discontinuous communication management
US10455503B2 (en) * 2014-10-21 2019-10-22 Lg Electronics Inc. Method for monitoring downlink control channel in wireless communication system and apparatus for the same
US10805000B2 (en) * 2015-07-23 2020-10-13 Qualcomm Incorporated Method and apparatus for discontinuous transmission in bent-pipe relay in satellite communication systems
EP3501129B1 (en) * 2016-08-19 2022-04-06 Telefonaktiebolaget LM Ericsson (publ) Method and apparatus for handling discontinuous reception in a communications network
WO2018226026A1 (en) * 2017-06-07 2018-12-13 Samsung Electronics Co., Ltd. System and method of identifying random access response
US11412450B2 (en) * 2017-06-13 2022-08-09 Apple Inc. Paging and essential system information block (SIB) transmission in the unlicensed internet of things (U-IOT) system
WO2019095107A1 (en) * 2017-11-14 2019-05-23 Oppo广东移动通信有限公司 Method for reporting capability, user equipment, and network device
KR102638627B1 (en) 2018-02-23 2024-02-21 삼성전자 주식회사 Method and apparatus for retransmitting uplink data configured in discontinuous reception in a wireless communication system
CN118575459A (en) * 2022-12-30 2024-08-30 北京小米移动软件有限公司 Method and device for sending or receiving indication information and readable storage medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007025138A2 (en) 2005-08-26 2007-03-01 Qualcomm Incorporated Method and apparatus for packet communications in wireless systems

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100382641C (en) * 2004-08-17 2008-04-16 中兴通讯股份有限公司 Channel allocation method for multi-carrier CDMA system
US20090086657A1 (en) * 2007-10-01 2009-04-02 Comsys Communication & Signal Processing Ltd. Hybrid automatic repeat request buffer flushing mechanism
JP2011506484A (en) * 2007-12-13 2011-03-03 アルニラム ファーマシューティカルズ， インコーポレイテッド Methods and compositions for prevention or treatment of RSV infection
ES2428223T3 (en) * 2008-03-25 2013-11-06 Telefonaktiebolaget L M Ericsson (Publ) DRX functionality in multi-carrier wireless networks
US8711785B2 (en) 2008-03-25 2014-04-29 Qualcomm Incorporated Fast carrier allocation in multi-carrier systems
CN104038992B (en) 2008-04-25 2017-09-22 交互数字专利控股公司 The method supported DC HSDPA node B and used in node B
US8184599B2 (en) * 2008-06-23 2012-05-22 Qualcomm Incorporated Management of UE operation in a multi-carrier communication system
JP5810873B2 (en) * 2011-12-06 2015-11-11 大同特殊鋼株式会社 Ultrasonic flaw detection method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007025138A2 (en) 2005-08-26 2007-03-01 Qualcomm Incorporated Method and apparatus for packet communications in wireless systems

Cited By (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2009271334B2 (en) * 2008-06-23 2013-10-31 Qualcomm Incorporated Management of UE operation in a multi-carrier communication system
US9084261B2 (en) 2009-03-16 2015-07-14 Qualcomm Incorporated Discontinuous uplink transmission operation and interference avoidance for a multi-carrier system
GB2474960B (en) * 2009-10-29 2012-04-18 Lg Electronics Inc Method of operating user equipment in wireless communication system using a plurality of uplink frequencies
GB2474960A (en) * 2009-10-29 2011-05-04 Lg Electronics Inc HSPA system using a plurality of uplink frequencies
WO2011072721A1 (en) * 2009-12-15 2011-06-23 Nokia Corporation Method, mobile station, base station and computer program product to control the activation of a wireless carrier
US8902817B2 (en) 2009-12-15 2014-12-02 Nokia Corporation Method, mobile station, base station and computer program product to control the activation of a wireless carrier
WO2011086533A1 (en) * 2010-01-15 2011-07-21 Nokia Corporation Harq acknowledgment channel coding for 4-carrier hsdpa mimo
US9401781B2 (en) 2010-01-15 2016-07-26 Nokia Technologies Oy HARQ acknowledgment channel coding for 4-carrier HSDPA MIMO
WO2011098024A1 (en) * 2010-02-11 2011-08-18 华为技术有限公司 Method and apparatus for controlling carrier state in multi-carrier system
US8514820B2 (en) * 2010-02-12 2013-08-20 Interdigital Patent Holdings, Inc. Sending feedback for multiple downlink carriers
US20110249656A1 (en) * 2010-02-12 2011-10-13 Interdigital Patent Holdings, Inc. Sending Feedback for Multiple Downlink Carriers
US9668241B2 (en) 2010-02-12 2017-05-30 Interdigital Patent Holdings, Inc. Sending feedback for multiple downlink carriers
WO2011123791A1 (en) * 2010-04-02 2011-10-06 Interdigital Patent Holdings, Inc. Dynamic control channel monitoring set for multi-carrier operations
WO2011161538A3 (en) * 2010-06-21 2012-07-26 Alcatel Lucent Method and apparatus for optimizing a user plan operation in a communication system based on carrier aggregation
US8976668B2 (en) 2010-06-21 2015-03-10 Alcatel Lucent Method and apparatus for optimizing a user plan operation in a communication system based on carrier aggregation
CN102291770A (en) * 2010-06-21 2011-12-21 上海贝尔股份有限公司 Method and device for optimizing user plane operation in communication system based on carrier aggregation
CN101931433A (en) * 2010-08-06 2010-12-29 中兴通讯股份有限公司 Multipath searching method and multipath searcher
EP2620035A1 (en) * 2010-09-20 2013-07-31 Nokia Siemens Networks Oy Discontinuous reception across transmissions on different radio access technologies
JP2013539321A (en) * 2010-10-01 2013-10-17 インターデイジタル パテント ホールディングス インコーポレイテッド Method of adjusting DRX (DISCONTINUOUSRECEPTION)
US8867442B2 (en) 2010-10-01 2014-10-21 Interdigital Patent Holdings, Inc. Method and apparatus for fast assistive transmission operation
EP2955972A1 (en) * 2010-10-01 2015-12-16 Interdigital Patent Holdings, Inc. Method for and apparatus for simultaneous reception of downlink shared channels from multiple cells
WO2012044694A1 (en) * 2010-10-01 2012-04-05 Interdigital Patent Holdings, Inc. Method for coordinating discontinuous reception, drx
AU2011308916B2 (en) * 2010-10-01 2016-06-30 Interdigital Patent Holdings, Inc. Method for coordinating discontinuous reception, DRX
CN107197492A (en) * 2010-10-01 2017-09-22 交互数字专利控股公司 For coordinating the discontinuous method for receiving DRX
US10342007B2 (en) 2010-10-01 2019-07-02 Interdigital Patent Holdings, Inc. Method and apparatus for fast assistive transmission operation
US9356750B2 (en) 2010-10-01 2016-05-31 Interdigital Patent Holdings, Inc. Method and apparatus for fast assistive transmission operation
US9913270B2 (en) 2010-10-01 2018-03-06 Interdigital Patent Holdings, Inc. Method and apparatus for fast assistive transmission operation
JP2017034684A (en) * 2010-10-01 2017-02-09 インターデイジタル パテント ホールディングス インコーポレイテッド Method for coordinating discontinuous reception (drx)
CN103155687A (en) * 2010-10-01 2013-06-12 交互数字专利控股公司 Method for coordinating discontinuous reception DRX
AU2011308916A1 (en) * 2010-10-01 2013-05-02 Interdigital Patent Holdings, Inc. Method for coordinating discontinuous reception, DRX
KR101797170B1 (en) 2010-10-01 2017-11-15 인터디지탈 패튼 홀딩스, 인크 Method for coordinating discontinuous reception, drx
CN102448152A (en) * 2010-10-13 2012-05-09 中兴通讯股份有限公司 Energy-saving control method and system of base station
EP2627148A1 (en) * 2010-11-08 2013-08-14 Huawei Technologies Co., Ltd. Method and device for controlling channel transmission state
EP2986079A1 (en) * 2010-11-08 2016-02-17 Huawei Technologies Co., Ltd. Method and apparatus for controlling channel transmission status
US9215743B2 (en) 2010-11-08 2015-12-15 Huawei Technologies Co., Ltd. Method and apparatus for controlling channel transmission status
US9681489B2 (en) 2010-11-08 2017-06-13 Huawei Technologies Co., Ltd. Method and apparatus for controlling channel transmission status
JP2013543343A (en) * 2010-11-08 2013-11-28 ▲ホア▼▲ウェイ▼技術有限公司 Method and device for controlling the transmission state of a channel
EP2627148A4 (en) * 2010-11-08 2013-09-11 Huawei Tech Co Ltd Method and device for controlling channel transmission state
US8654691B2 (en) 2010-11-15 2014-02-18 Blackberry Limited Managing wireless communications
US8937876B2 (en) 2010-11-15 2015-01-20 Blackberry Limited Managing communications across a wireless network
US8611240B2 (en) 2010-11-15 2013-12-17 Blackberry Limited Managing wireless communications
WO2012065915A1 (en) * 2010-11-15 2012-05-24 Research In Motion Limited Managing wireless communications
EP3573421A1 (en) * 2010-11-15 2019-11-27 BlackBerry Limited Managing wireless communications
US9363847B2 (en) 2011-04-11 2016-06-07 Broadcom Corporation Method and apparatus for providing for discontinuous reception via cells having different time division duplex subframe configurations
WO2012139272A1 (en) * 2011-04-11 2012-10-18 Renesas Mobile Corporation Method and apparatus for providing for discontinuous reception via cells having different time division duplex subframe configurations
US11832229B2 (en) 2011-08-22 2023-11-28 Samsung Electronics Co., Ltd. Method and apparatus for supporting multiple frequency bands in mobile communication system
US10779349B2 (en) 2012-01-09 2020-09-15 Samsung Electronics Co., Ltd. Method and apparatus for logging information
US11696356B2 (en) 2012-01-09 2023-07-04 Samsung Electronics Co., Ltd. Method and apparatus for logging information
US10959172B2 (en) 2012-01-27 2021-03-23 Samsung Electronics Co., Ltd. Method and apparatus for transmitting and receiving data by using plurality of carriers in mobile communication systems
EP2849367A4 (en) * 2012-05-09 2016-02-24 Samsung Electronics Co Ltd Method and apparatus for transceiving data using plurality of carriers in mobile communication system
US10129005B2 (en) 2012-05-09 2018-11-13 Samsung Electronics Co., Ltd. Method and apparatus for transceiving data using plurality of carriers in mobile communication system
US12041665B2 (en) 2012-05-09 2024-07-16 Samsung Electronics Co., Ltd. Method and apparatus for transmitting and receiving data using plurality of carriers in mobile communication system
USRE50037E1 (en) 2012-05-09 2024-07-09 Samsung Electronics Co., Ltd. Method and apparatus for transceiving data using plurality of carriers in mobile communication system
US11683838B2 (en) 2012-05-09 2023-06-20 Samsung Electronics Co., Ltd. Method and apparatus for transmitting and receiving data using plurality of carriers in mobile communication system
US10778402B2 (en) 2012-05-09 2020-09-15 Samsung Electronics Co., Ltd. Method and device for transmitting and receiving data by using multiple carriers in mobile communication system
US9544896B2 (en) 2012-05-09 2017-01-10 Samsung Electronics Co., Ltd. Method and apparatus for transceiving data using plurality of carriers in mobile communication system
EP3742864A1 (en) * 2012-05-09 2020-11-25 Samsung Electronics Co., Ltd. Method and apparatus for transceiving data using plurality of carriers in mobile communication system
US11405169B2 (en) 2012-05-09 2022-08-02 Samsung Electronics Co., Ltd. Method and device for transmitting and receiving data by using multiple carriers in mobile communication system
US10887919B2 (en) 2012-05-09 2021-01-05 Samsung Electronics Co., Ltd. Method and apparatus for transmitting and receiving data using plurality of carriers in mobile communication system
JP2015516129A (en) * 2012-05-10 2015-06-04 華為技術有限公司Ｈｕａｗｅｉ Ｔｅｃｈｎｏｌｏｇｉｅｓ Ｃｏ．，Ｌｔｄ． Method for determining data boundaries, method for transmitting instruction information, and apparatus thereof
US11363489B2 (en) 2012-05-21 2022-06-14 Samsung Electronics Co., Ltd. Method and device for transmitting and receiving data in mobile communication system
US10791480B2 (en) 2012-05-21 2020-09-29 Samsung Electronics Co., Ltd. Method and device for transmitting and receiving data in mobile communication system
US9924537B2 (en) 2013-03-19 2018-03-20 Huawei Technologies Co., Ltd Control information indication method and apparatus
EP3361784A1 (en) * 2013-03-19 2018-08-15 Huawei Technologies Co., Ltd. Control information indication method and apparatus
EP2955943A4 (en) * 2013-03-19 2016-03-02 Huawei Tech Co Ltd Control information indication method and device
US10194460B2 (en) 2014-02-27 2019-01-29 Huawei Technologies Co., Ltd. User equipment, network side device, and method for sending DPCCH
WO2016048228A1 (en) * 2014-09-26 2016-03-31 Telefonaktiebolaget Lm Ericsson (Publ) Cross-carrier indication signal in lbt systems
US10349460B2 (en) 2014-12-15 2019-07-09 Qualcomm Incorporated Dual active connections over single radio user equipment
EP3235322A4 (en) * 2014-12-15 2018-07-18 Qualcomm Incorporated Dual active connections over single radio user equipment
US10880702B1 (en) 2019-06-04 2020-12-29 Sprint Communications Company L.P. Data communications for user applications that are executing in a wireless user device

Also Published As

Publication number Publication date
KR20140066780A (en) 2014-06-02
CN104038992B (en) 2017-09-22
JP2011519539A (en) 2011-07-07
JP5291186B2 (en) 2013-09-18
TW201306627A (en) 2013-02-01
JP2013179697A (en) 2013-09-09
CN104038326B (en) 2017-08-04
EP2292053B1 (en) 2017-06-21
TWI538541B (en) 2016-06-11
KR20100137579A (en) 2010-12-30
CN102017727A (en) 2011-04-13
US9924560B2 (en) 2018-03-20
TWI542236B (en) 2016-07-11
US9307572B2 (en) 2016-04-05
US20170150440A1 (en) 2017-05-25
US20090296643A1 (en) 2009-12-03
KR101554384B1 (en) 2015-09-18
TWM366833U (en) 2009-10-11
CN102017727B (en) 2014-06-25
WO2009132290A3 (en) 2010-01-21
EP2292053A2 (en) 2011-03-09
US20160174290A1 (en) 2016-06-16
CA2722488C (en) 2014-12-16
KR101260640B1 (en) 2013-05-03
JP2017077035A (en) 2017-04-20
AR071599A1 (en) 2010-06-30
US8929301B2 (en) 2015-01-06
EP3288318A1 (en) 2018-02-28
JP5525089B2 (en) 2014-06-18
JP2014131364A (en) 2014-07-10
CN104038326A (en) 2014-09-10
KR20120068963A (en) 2012-06-27
TW201010474A (en) 2010-03-01
WO2009132290A8 (en) 2010-04-15
KR101554444B1 (en) 2015-09-18
CA2722488A1 (en) 2009-10-29
CN201541255U (en) 2010-08-04
US20150117378A1 (en) 2015-04-30
US9609686B2 (en) 2017-03-28
CN104038992A (en) 2014-09-10

Similar Documents

Publication Publication Date Title
US9924560B2 (en) Method and apparatus for simultaneously receiving on two carriers and performing discontinuous transmission and reception in dual cell high speed downlink packet access
US20240314548A1 (en) Utilizing a plurality of uplink carriers and a plurality of downlink carriers for multi-cell communications
US7941626B2 (en) Method and apparatus for controlling discontinuous transmission and reception

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200980114683.0

Country of ref document: CN

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09735925

Country of ref document: EP

Kind code of ref document: A2

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2722488

Country of ref document: CA

Ref document number: 2011506484

Country of ref document: JP

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 20107026448

Country of ref document: KR

Kind code of ref document: A

REEP Request for entry into the european phase

Ref document number: 2009735925

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2009735925

Country of ref document: EP