WO2016089268A1 - Rapport d'informations d'état de canal réduit dans un système de communication sans fil à plusieurs porteuses - Google Patents

Rapport d'informations d'état de canal réduit dans un système de communication sans fil à plusieurs porteuses Download PDF

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Publication number
WO2016089268A1
WO2016089268A1 PCT/SE2014/051461 SE2014051461W WO2016089268A1 WO 2016089268 A1 WO2016089268 A1 WO 2016089268A1 SE 2014051461 W SE2014051461 W SE 2014051461W WO 2016089268 A1 WO2016089268 A1 WO 2016089268A1
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WIPO (PCT)
Prior art keywords
cqi
wireless device
cell
composite
cqi feedback
Prior art date
Application number
PCT/SE2014/051461
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English (en)
Inventor
Sairamesh Nammi
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
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Application filed by Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to PCT/SE2014/051461 priority Critical patent/WO2016089268A1/fr
Publication of WO2016089268A1 publication Critical patent/WO2016089268A1/fr

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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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0028—Formatting
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0046—Code rate detection or code type detection
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0072—Error control for data other than payload data, e.g. control data
    • H04L1/0073—Special arrangements for feedback channel

Definitions

  • the present disclosure relates generally to a network node and a wireless device of a radio network and methods therein, for flexible channel quality indicator (CQI) reporting in a wireless communication system with HSDPA operation.
  • CQI channel quality indicator
  • uplink HSPA all wireless devices are transmitting using same spreading codes and wireless devices are separated by non-orthogonal scrambling codes. This results in that wireless devices in uplink HSPA transmissions need to share an interference limited resource. Reducing the interference in uplink frequencies is thereby critical to ensure high SIR (Signal-to-lnterference Ratio) levels on uplink transmission channel and to maintain a stable system operation.
  • SIR Signal-to-lnterference Ratio
  • the HS-DPCCH transmissions from all UEs contribute to the interference level and the Rise over Thermal (RoT) in uplink.
  • RoT Rise over Thermal
  • the HS-DPCCH transmissions could be reduced for lowering the RoT and enabling higher system throughput capacity or increasing coverage.
  • Configuring the reporting period of HS-DPCCH is a tricky problem. If the reporting period is small, the accuracy of the CQI is good, i.e. the base station has updated information of the radio channel conditions. The drawback is that it requires more signaling from UE. This can cause a reduced system throughput for uplink, i.e. uplink capacity.
  • the quality of the CQI is very good, i.e., the base station is keep tracking of the channel.
  • the drawback is that it may require high signaling overhead from UE or wireless device. This can cause a reduced system throughput for uplink, i.e. uplink capacity.
  • the downlink throughput may be reduced for some channels since the scheduling may be based on outdated CQI.
  • the solutions covered in WO 2014/148964 A1 assume that the wireless device is configured in a mode where downlink transmission is done from a single Node B.
  • the wireless device is configured in a multipoint wireless communication system (wireless device can simultaneously receive data from two Node Bs and/or cells)
  • the 3GPP standard recommends using a single HS- DPCCH.
  • the configuration of reporting period is more complex because if we switch off the CQI reporting period of one Node B, it might impact (decrease in throughput) the performance on the other Node B.
  • the wireless device can adaptively exclude the CQI reporting for such a cell and consequently focus on reporting CQI only for a cell in which there is activity and thereby reduce the signaling overhead of HS-DPCCH.
  • the reduced signaling in UL will decrease the UL interference.
  • a method for operating a wireless device comprising determining (S1 ), based on the first- and the second CQI reporting periods, whether to send composite CQI feedback or non-composite CQI feedback and sending (S2) CQI feedback according to said determination.
  • a wireless device connectable to a first- and a second cell with HSDPA operation, the wireless device is further adapted to being configured with a first- and a second CQI reporting period associated with the respective first- and second cell, the wireless device being additionally adapted to determine, based on the first- and the second CQI reporting periods, whether to send composite CQI feedback or non-composite CQI feedback and send CQI feedback according to said determination.
  • a method for operating a network node of a wireless communication network the network node is controlling at least a first cell, wherein the first cell is connected to a wireless device in HSDPA operation with the cell, wherein the HSDPA operation is in connection with at least a second cell, wherein the method comprises receiving CQI feedback,
  • a network node adapted to operate in a wireless communication network; the network node being adaptable to control at least a first cell, wherein the first cell is connected to a wireless device in HSDPA operation wherein the HSDPA operation is connected with at least a second cell wherein the network node being further adaptable to receive CQI feedback and determine, based on composition conditions, whether the CQI feedback is composite or non-composite CQI feedback.
  • a first computer program comprising instructions which, when executed on a processing circuitry, cause the processing circuitry to carry out and/or control any methods, performed in or by the wireless device, disclosed herein.
  • a second computer program comprising instructions which, when executed on a processing circuitry, cause the processing circuitry to carry out and/or control any methods, performed in or by the network node, disclosed herein.
  • a carrier containing the first computer program wherein the carrier is one of an electronic signal, optical signal, radio signal, computer or processing circuitry readable storage medium.
  • a carrier containing the second computer program wherein the carrier is one of an electronic signal, optical signal, radio signal, computer or processing circuitry readable storage medium.
  • FIG. 1 Schematic illustration of an example of a wireless communication system (100) serving a wireless device (200) in HSDPA operation.
  • Fig. 2a Illustrates a message sequence chart for data transmission with one cell involved in HSDPA operation in a wireless communication system.
  • Fig. 2b Illustrates a message sequence chart for data transmission with two cells involved in HSDPA operation in a wireless communication system.
  • Fig. 3a Illustration of an example of the HS-DPCCH structure for non- composite CQI feedback for HSDPA operation in a wireless communication system.
  • Fig. 3b Illustration of an example of the HS-DPCCH structure for composite CQI feedback for HSDPA operation in a wireless communication system.
  • Fig 4 Illustration of an example of the HS-DPCCH structure for composite
  • Fig. 5a An example of how the CQI can be concatenated prior to encode composite CQI feedback.
  • Fig. 5b An example the how the CQI may be concatenated with non-existing CQI from a serving cell in which the wireless device has detected low activity.
  • Fig. 5c An example the how the CQI may be concatenated with non-existing CQI from a non-serving cell in which the wireless device has detected low activity
  • Fig. 6 Illustration different CQI reporting periods related to inactivity on HS- PDSCH.
  • Fig. 7 Illustration of the timing between the uplink channels and the downlink channels in HSDPA operation.
  • FIG. 8 Another illustration of how the CQI reporting periods for the different cells influence the CQI reporting time instances on the HS-DPCCH in HSDPA operation
  • Fig. 9 A method in a wireless device.
  • Fig. 10 A method in a network node.
  • Fig. 1 1/13 An example of a wireless device.
  • Fig. 12/14 An example of a network node.
  • a wireless device may be connected and/or connectable to one or more cells. This may mean that the wireless device may send- and/or transmit- as well as receive data to and/or from the cell and/or network node.
  • a wireless device may be connected to one or more cells with HSDPA operation. This may be regarded as if the wireless device may send- and/or transmit- as well as receive data to and/or from at least two cells and/or network nodes simultaneously on the same frequency carrier.
  • a wireiess device can be connected to more than one cell. capabilities, be configured to operate, simultaneously, in multiple radio frequencies ao.c
  • a wireless device may be connected to a first- and a second cell with HSDPA operation,
  • a first cell may be defined as the serving HS-DSCH cell
  • the serving HS-DSCH cell is associated with the UTRAN access point and/or NodeB and/or network node, and may perform transmission and reception of the serving HS-DSCH radio link for a given wireless device.
  • the serving HS-DSCH cell may be part of the current active set of the wireless device.
  • a second cell may be defined as an assisting secondary serving HS-DSCH Cell.
  • the assisting secondary serving HS-DSCH Cell is a cell which in addition to the serving HS-DSCH cell, is operating on another frequency and/or within another carrier.
  • the first- and the second cells may operate on different carriers and/or frequencies.
  • control Information in this context may e.g. be e.g. carrier specific channel state Information such as e.g. CQI and HARQ-ACK.
  • the common control channel can be used for sending CQI feedback for each cell and/or HSDPA radio link In muiti carrier HSDPA operation.
  • the common channel and/or carrier may be used for transmission of e.g.
  • the common channel and/or carrier may be e.g. an HS-DPCCH. It can be anticipated that the common channel is configured to operate In any of the cells and/or carriers in the HSDPA operation or In other cell.
  • One specific form of muiti carrier operation may be carrier aggregation,
  • a CQI reporting period may be associated with one cell only.
  • a CQI reporting period being associated with one cell may mean that the CQI reporting period is valid and/or relevant for reporting CQI feedback for that cell although the UE or wireless device, may be connected to more than one cell in HSDPA operation.
  • a wireless device being connected to a cell in HSDPA operation can be defined as if the wireless device may receive user data and/or control data over an HS- PDSCH channel in a cell provided by a network node in a 3GPP WCDMA UTRAN.
  • a wireless device being connected to a cell in HSDPA operation may be
  • a wireless device may be any wireless device
  • CQI values may be a value between 0 and 31 that may represent the measured and/or estimated, SINR which the wireless device has experienced.
  • the CQI value may be represented by five bits and the five bits may be encoded into 20 bits. These 20 bits may be transmitted in two slots in a HS-DPCCH subframe as CQI feedback.
  • the subframe- and slot-structure of an HS-DPCCH channel is illustrated in figure 2.
  • a CQI reporting time instance may be defined as position in a feedback channel.
  • the feedback channel may be HS-DPCCH.
  • the feedback channel may be defined per cell and/or per HSDPA radio link.
  • the HS-DPCCH may be a common feedback channel for all cells in HSDPA operation with the wireless device.
  • the position in the feedback channel may be expressed as a slot and/or slots in a subframe or TTI on feedback channel.
  • a wireless device may be said to being configured with a CQI reporting period, which may mean that the wireless device is informed by a network node and/or a cell provided by a network node, about a time interval.
  • the time interval may be used to control the time between the starting point of two consecutive CQI reporting time instances associated with one cell.
  • the CQI reporting period and/or the time interval may be expressed in terms of subframes and/or slots and/or TTI's of the feedback channel.
  • a time interval and/or CQI reporting period is periodic in the sense that when the time interval and/or period has elapsed, a new period and/or time interval is started. If the wireless device is connected to several cells with HSDPA operation, a configuration of CQI reporting period may be done for each cell involved in the HSDPA operation.
  • CQI feedback may be composite- and/or non-composite CQI feedback.
  • Composite CQI feedback may comprise a jointly encoded CQI feedback, wherein each CQI feedback value may be related to different cells and/or HSDPA radio links in e.g. HSDPA operation.
  • Composite CQI feedback may be sent from the wireless device when a wireless device has determined that the CQI reporting time instance for a first cell coincide with a CQI reporting time instance for a second HSDPA radio link.
  • FIG 8 there is illustrated an example of composite CQI feedback.
  • the wireless device may determine that composite CQI feedback (CQI_C) may be sent in HS-DPCCH subframe 1 and subframe 5.
  • the wireless device may also determine, based on cell specific parameters, that non- composite CSI feedback related to CQI (CQM ), shall be sent and/or transmitted in HS-DPCCH subframes 2, 3 and 4.
  • CPICH1 and CPICH2 in figure 8 may be two different pilot signals CPICH1 and CPICH2.
  • CPICH1 belong to a first cell whereas CPICH2 belongs to a second cell.
  • There is also a wireless device is connected to the first- and second cells.
  • the cells provide HSDPA operation for the wireless device.
  • the wireless device is configured with a first- and a second CQI reporting period (1001 , 1002) and the first- and the second CQI reporting periods (1001 , 1002) are applied in the respective first- and second cells.
  • the association between the CQI reporting periods and the cells may be defined as if the CQI reporting period may determine the cycle and/or frequency for sending CQI feedback in/for a cell and/or an HSDPA radiolink.
  • the first time slot and/or subframe and/or TTI in which the first CQI feedback is available may be the first CQI reporting time instance after the encoded CQI feedback is available.
  • Applying a CQI reporting period may be defined as sending and/or transmitting CQI feedback with a determined periodicity and/or cycle with a known starting- and/or reference subframe and/or TTI and/or time instance. and/or slot in which is applied in the respective cell.
  • the wireless device may measure and/or estimate a SINR on the CPICH (CPICH1 and CPICH2) for each cell involved in the HSDPA operation.
  • the wireless device may thereafter encode and transmit the
  • Composite CQI feedback or composite feedback may comprise a jointly encoded CQI feedback, wherein each CQI feedback may be related to different HSDPA radio links and/or cells in e.g. HSDPA operation.
  • Composite CQI feedback may be sent from the wireless device when a wireless device has determined that the CQI reporting time instance for a first HSDPA radio link and/or first cell coincide with a CQI reporting time instance for a second HSDPA radio link and/or second cell.
  • FIG 8 there is illustrated an example of composite CQI feedback.
  • the wireless device may determine that composite CQI feedback (CQI_C) may be sent in HS-DPCCH subframe 1 and subframe 5.
  • the wireless device may also determine, based on cell specific parameters, that non-composite CSI feedback related to CQI (CQM ), shall be sent and/or transmitted in HS-DPCCH subframes 3.
  • the wireless device determines that CQI feedback for different cells and/or HSDPA radio links, shall be sent in the same TTI and/or subframe and/or time slots, on the common HS- DPCCH, the CQI reporting time instances are said to coincide.
  • CQI feedback may be blindly decoded.
  • blindly decoding CQI feedback may comprise decoding of CQI feedback and obtain at least one bit representation and/or CQI value, reflecting the requested CQI for one or both HSDPA radio links and/or cells.
  • the value obtained after the decoding can be compared with previous values of the output from blindly decoding CQI feedback.
  • FIG 1 it is illustrated a wireless communication system 100, wherein the wireless communication system 100 may comprise network nodes 101 , 102, 121 .
  • the network nodes 101 , 102 may be NodeBs according to 3GPP.
  • 3GPP may provide one or more cells (B1 , B2, B3, C1 , C2, C3).
  • the cells (B1 , B2, B3, C1 , C2, C3) may provide one or more HSDPA radio links.
  • FIG. 1 there is also illustrated a wireless device 200 which is connected to two cells (B1 , C1 ) and/or network nodes (101 , 102) for HSDPA operation.
  • Each cell (B1 , C1 ) that is connected to the wireless device in HSDPA operation provides an
  • HSDPA radio link (401 , 402).
  • a network node 101 , 102, 121 may configure a wireless device in HSDPA operation, with several reporting periods, for example a low value for sending frequent CQI feedback and a high value for sending non-frequent CQI feedback at low activity.
  • a wireless device 200 may transmit and/or send CQI feedback according to a CQI reporting period with a low value, i.e. for frequent CQI feedback.
  • the wireless device may decode the downlink control channel (HS-SCCH) and based on that decoding the wireless device may determine that no data has been scheduled for the wireless device in the downlink direction during a number of (N) consecutive and/or successive TTI's and/or subframes.
  • HS-SCCH downlink control channel
  • the wireless device may, if the number of consecutive TTI's is greater than a threshold value (ThV), assume that there is no more data to be scheduled in the downlink direction on that carrier and/or cell and therefore another, non- frequent- or low activity CQI reporting period is applied.
  • Applying a CQI reporting period may be defined as sending and/or transmitting and/or reporting CQI feedback with a determined periodicity and/or cycle with a known starting- and/or reference subframe and/or TTI and/or time instance.
  • a wireless device (200) may be adapted to have timing relation, in particular a well-defined and/or synchronized timing relation, between the HS-DPCCH subframes and the CPICH in order to be able to transmit and/or send CQI feedback in the proper time slot and/or TTI or subframe after having measured and/or estimated the SINR and/or CQI on the CPICH.
  • the TTI and/or subframe and/or timeslot in which the wireless device sends and/or reports and/or transmits the CQI feedback may be called a CQI reporting time instance.
  • the wireless device may also be adapted to determine the timing relation between the different CPICH in different cells and the HS-DPCCH.
  • the wireless device may also be adapted to determine the timing relation between the HS-PDSCH and the HS-DPCCH.
  • the wireless device may also be adapted to determine the timing relation between the HS-PDSCH for all HSDPA radio links in HSDPA operation with the wireless device. Consequently, a wireless device which applies a non-frequent CQI reporting period, may whenever it decodes the HS- SCCH and determines that there is scheduled data to come on the HS-PDSCH, it will apply the frequent CQI reporting period, starting from the TTI and/or subframe in which it detected that scheduled data is coming on a HSDPA radio link, or from some reference TTI or subframe.
  • a wireless device (200) may be adapted to have timing relation, in particular a well-defined and/or synchronized timing relation, between the HS-DPCCH subframes and the CPICH in order to be able to send CQI feedback in the proper time slot.
  • the sending may be done after having estimated SINR based on measurements on the CPICH.
  • the wireless device may also be adapted to know the timing relation between the different CPICH in different cells and the HS- DPCCH.
  • the wireless device may also be adapted to know the timing relation between several HS-PDSCH and/or the HS-DPCCH.
  • a method for operating a wireless device the wireless device being connected to a first- and a second cell with HSDPA operation, the method optionally comprising configuring the wireless device with and/or the wireless device being further configured with a first- and a second CQI reporting period associated with the respective first- and second cell, wherein the method may optionally comprise: determining (S1 ), based on the first- and the second CQI reporting periods, whether to send composite CQI feedback or non- composite CQI feedback; sending (S2) CQI feedback according to said
  • a wireless device is disclosed, the wireless device being connectable to a first- and a second cell with HSDPA operation, the wireless device is further optionally adapted to being configured with a first- and a second CQI reporting period associated with the respective first- and second cell, the wireless device being additionally adapted to determine, based on the first- and the second CQI reporting periods, whether to send composite CQI feedback or non-composite CQI feedback and send CQI feedback according to said
  • a variant of the wireless device is presented wherein the wireless device is further adapted to determine that composite CQI feedback is sent if a first CQI reporting time instance is equal to a second CQI reporting time instance and to determine that non-composite CQI feedback is sent if the first CQI reporting time instance is not equal to the second CQI reporting time instance.
  • the first- and the second CQI reporting periods are based on HS-DSCH activity associated with the wireless device in the respective first- and second cells as disclosed herein.
  • the network node is controlling at least a first cell, wherein the first cell is connected to a wireless device in HSDPA operation with the cell, wherein the HSDPA operation is in connection with at least a second cell, wherein the method comprises receiving CQI feedback and determining, based on composition conditions, whether the CQI feedback is composite or non-composite CQI feedback.
  • composition conditions may be based on blind decoding of the CQI feedback.
  • blind decoding is performed by applying a first- and/or a second decoding method, each method generating a first- and second decoded value.
  • the first decoding method is associated with the non- composite CQI feedback and the second decoding method is associated with the composite CQI feedback.
  • the composition condition includes determining whether the first- and/or second decoded values is/are within an expected range and/or greater than an expected value. It may be considered that the expected value and/or the expected range is based on previously decoded CQI feedback.
  • composition condition may be based on a relation between a first- and a second CQI reporting period associated with the respective first- and second cells.
  • the second CQI reporting period, associated with the second cell may be obtained from and/or via either of:
  • the first- and the second CQI reporting periods may be based on HS- DSCH activity associated the respective first- and second cells.
  • a network node adapted to operate in a wireless communication network is considered.
  • the network node being adaptable to control at least a first cell, wherein the first cell is connected to a wireless device in HSDPA operation wherein the HSDPA operation is connected with at least a second cell wherein the network node being further adaptable to receive CQI feedback and determine, based on composition conditions, whether the CQI feedback is composite or non- composite CQI feedback.
  • a wireless device adapted for being connected to a first- and a second cell with an HSDPA operation, the wireless device is further adapted to being configured with a first- and a second CQI reporting period associated with the respective first- and second cell.
  • the wireless device comprises a determining module, adapted and/or configured to determine, based on the first- and the second CQI reporting periods, whether to send composite CQI feedback or non- composite CQI feedback and a sending module, adapted and/or configured to send CQI feedback according to said determination.
  • a network node adapted to operate in a wireless communication network, the network node being adaptable to control at least a first cell, wherein the first cell is connected to a wireless device in HSDPA operation wherein the HSDPA operation is connected with at least a second cell, wherein the network node further comprises a receiving module, adapted and/or configured to receive CQI feedback and a determining module, adapted and/or configured to determine, based on composition conditions, whether the CQI feedback is composite or non-composite CQI feedback.
  • a computer program comprising instructions which, when executed on a processing circuitry (210), cause the processing circuitry (210) to carry out and/or control the method according to any one of claims 1 -4.
  • a computer program comprising instructions which, when executed on a processing circuitry (1 10), cause the processing circuitry (1 10) to carry out and/or control the method according to any one of claims 9-19.
  • a carrier 120; 130
  • the carrier is one of an electronic signal, optical signal, radio signal, computer or processing circuitry readable storage medium.
  • a carrier 140; 150 containing the computer program of claim 34, wherein the carrier is one of an electronic signal, optical signal, radio signal, computer or processing circuitry readable storage medium.
  • the wireless device being connected to a first- and a second cell with HSDPA operation as illustrated in figure 1 , and the wireless device 200 being further configured with a first- and a second CQI reporting period (1001 , 1002) associated with the respective first- and second cell (B1 , C1 ).
  • the method comprises; determining (S1 ), based on the first- and the second CQI reporting periods, whether to send composite CQI feedback or non-composite CQI feedback; sending (S2) CQI feedback according to said determination.
  • the determining step S1 can be further described as the wireless device determining whether to send composite CQI feedback (CQI_C) if the CQI reporting periods 1001 , 1002, cause the CQI reporting time instances 2001 and 2002, to coincide. On the other hand, it is determined to send non-composite feedback if the CQI reporting periods 1001 , 1002 do not cause the CQI reporting time instances 2001 , 2002 to coincide.
  • CQI_C composite CQI feedback
  • the wireless device Based on the determination in S1 the wireless device sends CQI feedback.
  • the determination can also be performed based on CQI reporting time instances for the different cells and/or HSDPA radio links. In such a case, it may be determined that non-composite CQI feedback is sent if the first CQI reporting time instance is not equal to, or does not coincide with, the second CQI reporting time instance.
  • the first- and the second CQI reporting periods are based on HS-DSCH activity associated with the wireless device, in the respective first- and second cells.
  • the CQI reporting period, and consequently the CQI reporting time instance, for a cell and/or HSDPA radio link may vary with the activity on the HS-PDSCH. Since there are one HS-PDSCH and/or HSDPA radio link per cell in HSDPA operation with the wireless device, the CQI reporting period may vary between cells and consequently, the CQI reporting time instances per cell and/or HSDPA radio link may vary and consequently the determination of whether to send composite- or non-composite CQI feedback.
  • RoT Rise over Termal
  • the network node is controlling at least a first cell, wherein the first cell is connected to a wireless device in HSDPA operation with the cell, wherein the HSDPA operation is in connection with at least a second cell, wherein the method comprises receiving (S1 1 ) CQI feedback and determining (S12), based on composition conditions, whether the CQI feedback is composite or non-composite CQI feedback.
  • the network node e.g. a NodeB
  • the wireless device does not know if the wireless device has encoded CQI feedback as composite- or non-composite feedback.
  • a first alternative method may be briefly described as to blindly decode and test the output against an expected value.
  • the method may comprise a determining based on blind decoding of the CQI feedback, wherein the blind decoding is performed by applying a first- and/or a second decoding method.
  • the first decoding method may be associated with the non-composite CQI feedback and the second decoding method may be associated with the composite CQI feedback.
  • the decoded CQI feedback is tested against a condition, wherein the condition may be to check if the decoded CQI feedback is: - within- or outside an expected range
  • a range may be e.g. a weighted average of e.g. the latest received CQI values with a confidence interval wherein the range may be set out by the values representing the limits for the confidence interval.
  • the range or values that may be used for a test to determine if the blind decoding was performed with a correct decoder may also be obtained by some statistical prediction algorithm which is based on a sequence of previously decoded CQI feedback values.
  • the decoded CQI feedback is determined to assume a value outside the expected range of a test and/or below/under a target value
  • the decoding is repeated with another decoding method, e.g. as exemplified above.
  • the blind decoding is repeated with the second decoding method, associated with
  • Another alternative to determine, in a network node, if the CQI feedback is composite or non-composite, may be to determine, based on first- and/or second CQI reporting periods associated with the respective first- and second cells.
  • the composition condition is based on a relation between the CQI reporting periods and/or CQI reporting time instances.
  • the network node controlling the cell has obtained the CQI reporting periods and/or CQI reporting time instances for the cells involved in HSDPA operation with the UE.
  • This can be achieved via signalling (e.g. RRC signalling) from the wireless device to the first network node and/or signalling from another network node (e.g. NodeB) which may be serving the other cell in the HSDPA operation operation and/or from or via an RNC connected to the network nodes (NodeB's) involved in the HSDPA operation.
  • signalling e.g. RRC signalling
  • NodeB another network node which may be serving the other cell in the HSDPA operation operation and/or from or via an RNC connected to the network nodes (NodeB's) involved in the HSDPA operation.
  • FIG. 1 1 is a schematic diagram illustrating an example of a wireless device.
  • a computer program 225; 235 which is loaded into the memory 220 for execution by processing circuitry including one or more processors 210.
  • the processor(s) 210 and memory 220 are interconnected to each other to enable normal software execution.
  • An optional input/output device may also be interconnected to the processor(s) and/or the memory to enable input and/or output of relevant data such as input parameter(s) and/or resulting output parameter(s).
  • processor' should be interpreted in a general sense as any system or device capable of executing program code or computer program instructions to perform a particular processing, determining or computing task.
  • the processing circuitry including one or more processors is thus configured to perform, when executing the computer program, well-defined processing tasks such as those described herein.
  • the processing circuitry does not have to be dedicated to only execute the above- described steps, functions, procedure and/or blocks, but may also execute other tasks.
  • a computer program 225; 235 comprising instructions, which when executed by at least one processor 210, cause, the at least one processor 210 to: - determine (S1 ), based on the first- and the second CQI reporting periods, whether to send composite CQI feedback or non-composite CQI feedback
  • the proposed technology also provides a carrier 220; 230 comprising the computer program 225; 235, wherein the carrier is one of an electronic signal, an optical signal, an electromagnetic signal, a magnetic signal, an electric signal, a radio signal, a microwave signal, or a computer-readable storage medium.
  • FIG. 12 is a schematic diagram illustrating an example of a network node.
  • a computer program 125 135, which is loaded into the memory 120 for execution by processing circuitry including one or more processors 1 10.
  • the processor(s) 1 10 and memory 120 are interconnected to each other to enable normal software execution.
  • An optional input/output device may also be interconnected to the processor(s) and/or the memory to enable input and/or output of relevant data such as input parameter(s) and/or resulting output parameter(s).
  • processor' should be interpreted in a general sense as any system or device capable of executing program code or computer program instructions to perform a particular processing, determining or computing task.
  • the processing circuitry including one or more processors is thus configured to perform, when executing the computer program, well-defined processing tasks such as those described herein.
  • the processing circuitry does not have to be dedicated to only execute the above- described steps, functions, procedure and/or blocks, but may also execute other tasks.
  • a computer program 125; 135 comprising instructions, which when executed by at least one processor 1 10, cause the at least one processor 1 10 to:
  • the proposed technology also provides a carrier 120; 130 comprising the computer program 125; 135, wherein the carrier is one of an electronic signal, an optical signal, an electromagnetic signal, a magnetic signal, an electric signal, a radio signal, a microwave signal, or a computer-readable storage medium.
  • the software or computer program 125; 135; 225; 235 may be realized as a computer program product, which is normally carried or stored on a computer-readable medium 120; 130; 220; 230, in particular a non-volatile medium.
  • the computer-readable medium may include one or more removable or nonremovable memory devices including, but not limited to a Read-Only Memory
  • ROM Read Only Memory
  • RAM Random Access Memory
  • CD Compact Disc
  • DVD Digital Versatile Disc
  • HDD Hard Disk Drive
  • a corresponding communication station may therefore be defined as a group of function modules, where each step performed by the processor corresponds to a function module.
  • the function modules are implemented as a computer program running on the processor.
  • the communication station may alternatively be defined as a group of function modules, where the function modules are implemented as a computer program running on at least one processor.
  • FIG. 13 is a schematic block diagram illustrating an example of a wireless device comprising a group of function modules.
  • a wireless device 200 which comprises a determining module 250 and a sending module 260.
  • the determining module 250 is adapted and/or configured to determine, based on the first- and the second CQI reporting periods, whether to send composite CQI feedback or non-composite CQI feedback.
  • the sending module 260 is adapted and/or configured to send CQI feedback according to said determination
  • Figure 14 is a schematic block diagram illustrating an example of a network node comprising a group of function modules.
  • a network node 101 ; 102 which comprises a receiving module 140 and a determining module 160.
  • the receiving module 140 is adapted and/or configured to receive CQI feedback.
  • the determining module 160 is adapted and/or configured to determine, based on composition conditions, whether the CQI feedback is composite or non-composite CQI feedback.
  • the Channel-Quality Indicator may be transmitted in the 2nd and 3rd slots
  • CQI may be an indicator for HSDPA down-link channel quality.
  • the CQI may be signaled from a wireless device to a Node B and/or network node on one or several uplink HS-DPCCH physical channels.
  • the HS- DPCCH may reside other channel state information which may depend on configured downlink transmission mode.
  • Figure 2a shows the messages exchanged between Node-B and a wireless device when the wireless device is configured with only one carrier for HSDPA operation.
  • the wireless device estimates the channel, computes the channel quality information and pre-codes channel indicator. This information along with hybrid ARQ
  • ACK/NAK may be reported to Node-B using dedicated physical control channel (HS-DPCCH).
  • HS-DPCCH dedicated physical control channel
  • the structure of an HS-DPCCH for a single carrier is shown in Figure 3 when the wireless device is configured in non MIMO mode. It can be seen from the figure that in the first slot HARQ ACK is transmitted (1 Obits) and in the 2nd and 3rd slots CQI information is transmitted (20 bits). Note that CQI of 5 bits is block encoded (Reed Muller code) to form 20 bits.
  • the Node-B receives the encoded CQI of 20 bits, it allocates the required channelization codes, modulation and coding to the wireless device after scheduling. This information is conveyed to wireless device by shared control channel (HS-SCCH). Once the wireless device detects the HS-SCCH, downlink transmission starts through data traffic channel using Physical Downlink Shared Channel (HS-PDSCH).
  • HS-SCCH shared control channel
  • HS-PDSCH Physical Downlink Shared Channel
  • Figure 2b shows the message sequence chart for data transmission in a multipoint and /or multi carrier communication system.
  • Node B (101 ) indicates the primary Node B or serving cell and the Node B (102) indicates secondary Node B or the assisted Node B.
  • the pilot channel CPICH (P-CPICH) is sent from each Node B. Note that these pilot signals differ by different scrambling codes. From the individual pilot signals, UE estimates the SINR and the channel quality information are sent through a common feedback channel HS-DPCCH.
  • the HS- DPCCH structure is shown in Figure 3b.
  • the feedback signaling may consist of Hybrid-ARQ Acknowledgement (HARQ- ACK) and Channel-Quality Indication (CQI) for each link.
  • HARQ- ACK Hybrid-ARQ Acknowledgement
  • CQI Channel-Quality Indication
  • Each HS-DPCCH sub frame of length 2 ms (3 * 2560 chips) consists of 3 slots, each of length 2560 chips.
  • the CQI of the primary link (CQI1 ) and CQI of the secondary link (CQI2) may be jointly encoded using a (20, 10) block code and these 20 bits may be transmitted in the 2nd and 3rd slots.
  • An example of the joint encoding operation of CQI1 and CQI2 is shown in Figure 5a, where the 5 bits of individual CQI of the primary cell is concatenated with the 5 bits of CQI of the secondary link.
  • each Node B schedulers may decode the 10 bits and extract the corresponding CQI for the HSDPA radio link related to the CQI. This CQI information may be used in deciding the modulation information, transport block size, and the number of codes etc. for the next downlink transmission. This information may be sent through the HS-SCCH from each cell. The actual data transmission on HS-PDSCH may start once HS-SCCH is sent (after e.g. 2 slots and/or time slots).
  • a wireless device may be configured with two reporting periods, an activity- and a low activity reporting period.
  • an RNC may configure a wireless device with a short reporting period for frequent reporting at activity (normal or primary) and a high value for non-frequent reporting period at low activity.
  • a wireless device may report the CQI with an activity reporting period, as long as there may be data to be scheduled on the HS-PDSCH. However, if there is no data to transmit for N successive TTI's and or subframes, then the wireless device may assume that there is no data more to be scheduled in the downlink direction on that carrier and therefore the wireless device may start reporting less
  • the wireless device may decode the downlink control channel (HS-SCCH) to identify whether it is scheduled or not.
  • HS-SCCH downlink control channel
  • the value of N may be configurable by an RNC and/or a NodeB.
  • the wireless device When the wireless device is reporting CQI using a low activity reporting period representing, and the wireless device receives and/or decodes HS-SCCH correctly, it may start using and/or applying the activity reporting period starting from that TTI or subframe, of starting the high frequency reporting period at some reference TTI or subframe.
  • a wireless device may move to the low activity reporting cycle for that Node B.
  • the composite CQI feedback which may be jointly coded as in Figure 3b, instead of 10 bits, only 5 bits are used (before concatenation) as shown in Figure 5b and 5c .
  • the serving Node B is moved to low activity reporting cycle
  • the assisting Node B is moved to the low activity reporting cycle.
  • the composite CQI feedback should be constructed as in Figure 5a.
  • Figure 5b only the CQI bits correspond to the assisting Node B are encoded to form (20,5) block encoder, thereby improving the Hamming distance of the code, thereby improving the reliability of CQI detection at the receiver.
  • the wireless device may not receive data for a period of N TTIs (or equivalent msec), it will move to the low activity reporting cycle for that Node B.
  • N TTIs or equivalent msec
  • the composite CQI report which is jointly coded as in Figure 5a, instead of 10 bits which are composed of 5+5 bits (that is the CQI is repeated) as shown in Figure 5a, when there is no data on the serving Node B (since it is already moved to the secondary reporting cycle).
  • the main advantage of this method is an additional coding gain provided by the repeated code which in turn improves the reliability of the CQI detection.
  • the wireless device may choose to move to the low activity or secondary reporting cycle when there is no data (no HS-SCCH detection) from either of the Node Bs.
  • the wireless device may chooses to move to the secondary or low activity reporting cycle and may use the composite CQI reporting of (20, 10) when there is no data (no HS-SCCH detection) from any one of the Node Bs.
  • a CQI reporting period may be defined as a time interval between the starting point of two consecutive CQI reporting time instances associated with one cell.
  • a CQI reporting time instance may be defined as position in a feedback channel.
  • the feedback channel may be HS-DPCCH.
  • the feedback channel may be per cell.
  • the HS-DPCCH may be a common feedback channel for all cells in HSDPA operation with the wireless device.
  • the position in the feedback channel may be expressed as a slot and/or slots in a subframe or TTI on feedback channel.
  • a wireless device may be said to being configured with a CQI reporting period, which may mean that the wireless device is informed by a network node and/or a cell provided by a network node, about a time interval.
  • the time interval may be used to control the time between the starting point of two consecutive CQI reporting time instances associated with one cell.
  • the CQI reporting period and/or the time interval may be expressed in terms of subframes and/or slots and/or TTI's of the feedback channel. If the wireless device is connected to several cells with HSDPA operation, a configuration of CQI reporting period may be done for each cell involved in the HSDPA operation.
  • a wireless device (200) may be adapted to have timing relation, in particular a well-defined and/or synchronized timing relation, between the HS-DPCCH subframes and the CPICH in order to be able to send CQI feedback in the proper time slot after having measured on the CPICH.
  • the wireless device may also be adapted to know the timing relation between the different CPICH in different cells and the HS-DPCCH.
  • the wireless device may also be adapted to know the timing relation between the HS-PDSCH and/or the HS-DPCCH.
  • CQI feedback may be composite- and/or non-composite CQI feedback.
  • Composite CQI feedback may comprise a jointly encoded CQI feedback, wherein each CQI feedback value may be related to different cells and/or HSDPA radio links in e.g. HSDPA operation.
  • Composite CQI feedback may be sent from the wireless device when a wireless device has determined that the CQI reporting time instance for a first cell coincide with a CQI reporting time instance for a second HSDPA radio link.
  • a first CQI reporting time instance may be determined based on a first CQI reporting period and/or a reference TTI or subframe.
  • a second CQI reporting time instance may be determined based on a second CQI reporting period and/or a reference subframe. If the CQI reporting time instances coincide, they may be said to be equal.
  • FIG 8 there is illustrated an example of composite CSI feedback.
  • the wireless device may determine that composite CSI feedback related to CQI (CQI_C) may be sent in HS-DPCCH subframe 1 and subframe 5.
  • the wireless device may also determine, based on cell specific parameters, that non-composite CSI feedback related to CQI (CQM ), shall be sent and/or transmitted in HS-DPCCH subframes 2, 3 and 4.
  • a CSI feedback may be blindly decoded. The blind part in the decoding is caused by not knowing whether the CSI feedback is composite or non-composite.
  • blindly decoding CSI feedback may comprise decoding of CSI feedback and obtain at least one bit representation and/or CSI value, reflecting the requested CSI for one or both HSDPA radio links and/or cells and/or network nodes.
  • the value obtained after the decoding can be compared with previous values of the output from blindly decoding CSI feedback.
  • CQI may be sent periodically or aperiodically.
  • Figure 1 is a general illustration of a wireless device (200) in HSDPA operation in a wireless communication network (100).
  • the network nodes (101 , 102) may control a number of cells (B1 -B3, and C1 -C3) which in turn may be connected and/or connectable to the wireless device via radio links.
  • the network nodes (101 , 102) may be NodeB's in a 3GPP UTRAN (Universal Terrestrial Radio Access Network).
  • 3GPP UTRAN Universal Terrestrial Radio Access Network
  • the wireless device may be connected to the network nodes (101 , 102) via at least two cells (B1 -B3, and C1 -C3) each cell may be controlling an HSDPA radio link (401 , 402) which are operating on the same frequency.
  • the HSDPA radio links may carry user data and signaling data between the wireless device and the network nodes. It may also carry information on feedback regarding channel quality, which may be called CQI feedback.
  • FIG. 2 shows the message sequence chart for data transmission in an HSDPA scenario.
  • the P-Node B (101 ) in the figure may be the called the primary Node B and may be controlling the serving HS-DSCH cell (B1 ) and the S-Node B (102) may indicate the secondary Node B and may be controlling the assisting serving HS-DSCH cell (C1 ).
  • the pilot channel CPICH (P-CPICH) is sent from each Node B (101 , 102). These pilot signals may differ only by different scrambling codes.
  • the wireless device (200) may estimate SINR (Signal to Interference and Noise Ratio) and based on that estimate, the wireless device (200) may send the channel quality information (CQI feedback) through a common feedback channel, the HS-DPCCH.
  • SINR Signal to Interference and Noise Ratio
  • CQI feedback channel quality information
  • the HS-DPCCH structure is shown in Figure 3 and the HS-DPCCH structure for composite CQI (CQI_C) is shown in Figure 4.
  • the HS-DPCCH may be a common feedback channel for both cells. Therefore, both cells in HSDPA operation have a common view of the uplink timing. This means that both cells have a common view of the absolute time instance in terms of uplink
  • the CQI reporting time instance on the HS-DPCCH may be determined in relation to when a measurement has been performed on the CPICH in a cell.
  • the feedback signaling may consist of Hybrid-ARQ Acknowledgement (HARQ- ACK) and/or Channel-Quality Indication (CQI) for each HSDPA radio link.
  • the feddback signalling may be based on the HS-PDSCH data transmitted in the same downlink (DL) subframe, on each HSDPA radio link, from the network node (101 , 102) towards the wireless device (200).
  • the HS-DPCCH feedback is sent in the uplink (UL), meaning that it is sent from the wireless device (200) to the network nodes (101 , 102) and/or cells (B1 -B3, C1 -C3), and each UL sub frame may be of length 2 ms and may consist of 3 slots or timeslots.
  • the HARQ-ACK for the first HSDPA radio link (401 ) and the second HSDPA radio link (402) may be
  • HARQ- ACK_C jointly/compositely encoded into a composite HARQ-ACK of 10 bits (HARQ- ACK_C) and are transmitted in the first slot of the first HS-DPCCH sub-frame (600).
  • the CQI of the first HSDPA radio link (401 ) and the CQI of the second HSDPA radio link (402) are jointly encoded into a composite CQI (CQI_C) of 20 bits by using a (20, 10) block code. These 20 bits are transmitted in the 2nd and 3rd slots.
  • the concatenation may be performed by concatenating the 5 bits representing CQI1 with the five bits representing CQI2, into a 10 bit sequence prior to passing the 10 bits through the block encoder to form the 20 encoded bits, i.e. a (20, 10) block code.
  • HSDPA operation there may only be one HSDPA radio link and consequently no concatenation of CQIs is required and this may be one scenario when non- composite CQI feedback is sent.
  • 5 bits, representing the CQI are passed through the block encoder to form the 20 bits that will fit into 2 nd and 3 rd slots of the subframe and therefore a (20,5) block encoding may be said to have been used when encoding non-composite CQI feedback.
  • this gives a more robust encoding of the CQI in the sense that less power is required to transmit the information at the same likelihood of decoding the value correctly at the receiver.
  • the RNC (121 ) may, configure the wireless device (200) with two different CQI reporting periods.
  • the RNC (121 ) may configure a low value for frequent- or normal activity CQI reporting and a high value for non-frequent CQI reporting, wherein the non-frequent CQI reporting may aim at reducing the UL interference at low activity on the HS- PDSCH, i.e. at low user data activity on the downlink.
  • the wireless device (200) When the wireless device (200) is configured for CSI reduction, the wireless device (200) sends CQI feedback with a normal reporting period. However, if no data is scheduled and/or transmitted on the HS-PDSCH during a number of, N, successive subframes, the wireless device (200) may assume that there is no data to be scheduled in the downlink direction on that HSDPA radio link carrier and the wireless device (200) transits to a state with a less frequent CQI feedback transmissions. This transition may mean that the wireless device applies a CQI reporting period for low activity based on the activity on the HS-PDSCH and/or based on the normal activity CQI reporting period and/or another value signaled to the wireless device from a network node and/or a NodeB.
  • the wireless device When the wireless device, applies another CQI reporting period in one of the HSDPA radio links and/or one of the cells, the wireless device may be said to be configured with a CQI reporting period. This state may be called a low activity state.
  • the UE decodes the downlink control channel (HS-SCCH) to identify whether any data is scheduled or not.
  • the value of N may be configured by the RNC (121 ) and/or a network node (101 , 102) during the data call setup in order for the network and the wireless device to know the conditions and/or rules for state transitions from inactivity to activity.
  • An alternative to the rules is that the wireless device signals to the NodeB at or in relation to state transitions to and/or from low activity.
  • the wireless device When the wireless device (200) is in low activity state, i.e. reporting CQI with non- frequent CQI reporting period, the wireless device may, whenever it receives and/or decodes the HS-SCCH correctly, it may move to the frequent CQI reporting period, wherein the reporting period may start at that first subframe or at a later subframe with some offset (K) from the first subframe.
  • K some offset
  • HSDPA operation there may be two HSDPA radio links in two different cells and consequently one CQI from each cell may be reported and or fed back to the corresponding cell (B1 -B3, C1 -C2) and/or network node (101 , 102). Consequently, if the above described CSI reduction technique is applied in HSDPA operation, there is a possibility there are different CQI reporting periods in the two different cells. The difference in reporting periods may cause the time instance and/or subframe and/or time slots to not coincide.
  • the wireless device (200) shall provide CQI on the common feedback channel (HS-DPCCH) according to the requested feedback.
  • HS-DPCCH common feedback channel
  • HSDPA operation there may be several HSDPA radio links and/or cells, associated with one wireless device.
  • Each HSDPA radio link and/or cell in HSDPA operation may be associated with a CQI feedback.
  • a reporting time instance for CQI may be configured per cell and/or HSDPA radio link.
  • CQI may be defined as the bit representation and/or the value of e.g. the
  • CQI feedback may be defined as the output from an encoding procedure in which a certain number of information bits, k, is encoded into n bits wherein the n bits may be generated by encoding of a CQI value and/or bit representation of the CQI.
  • the CQI feedback may be defined as the content fitting into a certain position on a feedback channel.
  • Sending- or reporting- or transmitting CQI feedback from the wireless device may be defined as transmitting encoded bits on the HS-DPCCH reflecting channel quality for an HSDPA radio link or cell in HSDPA operation with the wireless device.
  • the CQI feedback may be encoded into 20 bits and sent in slot 2 and 3 in an HS-DPCCH subframe.
  • uplink HSPA all wireless device are transmitting using same spreading codes and wireless device are separated by non-orthogonal scrambling codes. This results that wireless device in uplink HSPA transmissions need to share an interference limited resource. Reducing the interference in uplink frequencies is thereby critical to ensure high SIR levels on uplink transmission channel and to maintain a stable system operation.
  • the Channel-Quality Indicator (CQI) is transmitted in the 2nd and 3rd slots, and is the key indicator for HSDPA down-link channel quality and its frequent reporting is essential to maintain a good DL throughput.
  • the CQI is signaled from UE to Node B on one or several uplink HS-DPCCH physical channels, together with other channel state information, depending on configured downlink transmission mode.
  • HSDPA operation may include any kind of operation for which there is an HS-PDSCH channel configured for the wireless device. Some examples of HSDPA operation may be e.g. HSDPA multipoint operation, HSDPA multicarrier operation, HSDPA MIMO operation, MP-multiflow operation, MF- or multipoint HSDPA operation.

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  • Computer Networks & Wireless Communication (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de fonctionnement d'un dispositif sans fil, le dispositif sans fil étant connecté à une première et à une seconde cellule avec une opération HSDPA, le dispositif sans fil étant en outre configuré avec une première et une seconde période de rapport de CQI associées aux première et seconde cellules respectives, le procédé consistant à déterminer, sur la base des première et seconde périodes de rapport de CQI, s'il faut envoyer une rétroaction de CQI composite ou une rétroaction de CQI non composite et, sur la base de la détermination, à envoyer une rétroaction de CQI en conséquence.
PCT/SE2014/051461 2014-12-05 2014-12-05 Rapport d'informations d'état de canal réduit dans un système de communication sans fil à plusieurs porteuses WO2016089268A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109906629A (zh) * 2016-11-03 2019-06-18 高通股份有限公司 控制用于无线通信的报告操作

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009120797A1 (fr) * 2008-03-25 2009-10-01 Qualcomm Incorporated Rapport d’informations ack et cqi dans un système de communication sans fil
WO2010078425A1 (fr) * 2008-12-30 2010-07-08 Interdigital Patent Holdings, Inc. Rétroaction de canaux de commande pour operations avec porteuses descendantes multiples
WO2013025478A1 (fr) * 2011-08-12 2013-02-21 Interdigital Patent Holdings, Inc. Fourniture de rétroaction pour de multiples flux entrées multiples sorties multiples (mimo) de liaison descendante
WO2014148964A1 (fr) 2013-03-19 2014-09-25 Telefonaktiebolaget L M Ericsson (Publ) Équipement utilisateur, nœud de réseau et procédés dans celui-ci pour réduire une transmission d'informations d'état de canal

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009120797A1 (fr) * 2008-03-25 2009-10-01 Qualcomm Incorporated Rapport d’informations ack et cqi dans un système de communication sans fil
WO2010078425A1 (fr) * 2008-12-30 2010-07-08 Interdigital Patent Holdings, Inc. Rétroaction de canaux de commande pour operations avec porteuses descendantes multiples
WO2013025478A1 (fr) * 2011-08-12 2013-02-21 Interdigital Patent Holdings, Inc. Fourniture de rétroaction pour de multiples flux entrées multiples sorties multiples (mimo) de liaison descendante
WO2014148964A1 (fr) 2013-03-19 2014-09-25 Telefonaktiebolaget L M Ericsson (Publ) Équipement utilisateur, nœud de réseau et procédés dans celui-ci pour réduire une transmission d'informations d'état de canal

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
HUAWEI ET AL: "Considerations on Uplink for Introducing Multiflow Data Transmission", 3GPP DRAFT; R1-113852, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. San Francisco, USA; 20111114 - 20111118, 8 November 2011 (2011-11-08), XP050561943 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109906629A (zh) * 2016-11-03 2019-06-18 高通股份有限公司 控制用于无线通信的报告操作
CN109906629B (zh) * 2016-11-03 2022-05-31 高通股份有限公司 控制用于无线通信的报告操作

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