WO2011020439A1 - Procédé et dispositif adaptés pour configurer un schéma de transmission et/ou un mode de rétroaction - Google Patents

Procédé et dispositif adaptés pour configurer un schéma de transmission et/ou un mode de rétroaction Download PDF

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Publication number
WO2011020439A1
WO2011020439A1 PCT/CN2010/076153 CN2010076153W WO2011020439A1 WO 2011020439 A1 WO2011020439 A1 WO 2011020439A1 CN 2010076153 W CN2010076153 W CN 2010076153W WO 2011020439 A1 WO2011020439 A1 WO 2011020439A1
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Prior art keywords
feedback
transmission scheme
base station
different
user equipment
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PCT/CN2010/076153
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English (en)
Chinese (zh)
Inventor
彭莹
喻晓东
谌丽
高秋彬
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大唐移动通信设备有限公司
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Publication of WO2011020439A1 publication Critical patent/WO2011020439A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • 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

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a transmission scheme and/or a configuration method and device for a feedback mode. Background technique
  • the International Telecommunications Union puts very stringent requirements on the performance of the next generation of mobile communication systems, the International Mobile Telecommunication Advanced (T-A).
  • T-A International Mobile Telecommunication Advanced
  • the maximum system transmission bandwidth reaches 100MHz, and the peak rate of uplink and downlink data transmission needs to reach 1Gbps and 500M bps, and there is a very high demand for the average spectrum efficiency of the system, especially the edge spectrum efficiency.
  • 3GPP 3rd Generation Partnership Project
  • 3GPP proposed Coordinated Multi-Point Transmission/Reception in its next-generation mobile cellular communication system LTE-A.
  • CoMP CoMP to improve system performance.
  • the coordinated multi-point transmission technology improves the quality of the received signal and reduces the interference between cells by the joint scheduling or coordinated transmission of multiple cells separated geographically, thereby effectively improving the system capacity and the spectrum efficiency of the edge users.
  • multiple transmission points are base stations of different cells.
  • Cooperative multipoint transmission technology is divided into downlink coordinated transmission and uplink joint reception.
  • Joint scheduling allocates mutually orthogonal resources to different UEs (User Equipments) by coordinating time, frequency, and space resources between cells to avoid mutual interference.
  • Small interval interference is the main factor that restricts the performance of cell edge UEs. Therefore, joint scheduling can be To reduce interference between cells, thereby improving the performance of the cell edge UE.
  • FIG. 1 which is a schematic diagram of multi-cell joint scheduling in the prior art, three UEs that may interfere with each other are scheduled to mutually orthogonal resources through joint scheduling of three cells, which effectively avoids Interference between cells.
  • FIG. 2 is a schematic diagram of multi-cell joint transmission in the prior art, three cells transmit data to one UE on the same resource, and the UE simultaneously receives signals of multiple cells.
  • the superposition of useful signals from multiple cells can improve the signal quality received by the UE.
  • the joint transmission can also reduce the interference received by the UE, thereby improving system performance.
  • Uplink joint reception means that multiple cells simultaneously receive data sent by one UE, and the data received by each cell is jointly processed to improve the demodulation quality of the UE data.
  • a schematic diagram of uplink joint reception in the prior art is shown in FIG.
  • the UE In the downlink CoMP, in order to perform reasonable scheduling and transmission with the eNB (evolved Node B, the evolved ⁇ node, ie, the LTE base station), the UE needs to measure the channel quality of each cell and perform feedback.
  • the eNB evolved Node B, the evolved ⁇ node, ie, the LTE base station
  • the types of feedback defined in CoMP include the following three types:
  • Explicit feedback explicit channel status / statistical message feedback, the feedback message is not processed
  • Implicit feedback implicit channel status/statistical message feedback, feedback processed information, such as CQI (Channel Quality Indicator) / PMI (Precoding Matrix Indicator) / RI ( Rank Indicator, level indication ) ;
  • CQI Channel Quality Indicator
  • PMI Precoding Matrix Indicator
  • RI Rank Indicator, level indication
  • SRS Sounding Reference Signal
  • CSI Channel State Information
  • the feedback mode/type is notified in an explicit or implicit manner in Radio Resource Control (RRC) signaling, which is semi-static. process.
  • RRC Radio Resource Control
  • Different transmission modes are defined for different transmission schemes, that is, feedback content and overhead are different, which can reduce the corresponding overhead. Low, and with transmission scheme to achieve better transmission performance.
  • the Applicant has found that the prior art has at least the following problems:
  • the corresponding feedback mode should also be switched accordingly.
  • the two schemes are defined as two transmission modes and the handover mode is notified by RRC signaling as specified by the existing LTE system, it is a semi-static handover as the feedback mode.
  • RRC signaling as specified by the existing LTE system
  • it is a semi-static handover as the feedback mode.
  • two schemes are considered to exist in one transmission mode, dynamic fast handover can be supported according to the judgment of the network side, and the handover mode using the RRC signaling mode cannot support the handover of the scheme, which also makes the scheme
  • the switch has lost its practical meaning. Summary of the invention
  • the embodiments of the present invention provide a method and a device for configuring a transmission scheme and/or a feedback mode, which can enable different CoMP transmission schemes to correspond to different feedback modes, thereby better saving feedback resources.
  • an embodiment of the present invention provides a method for configuring a transmission scheme and/or a feedback mode, which specifically includes the following steps:
  • the base station receives feedback content that is fed back by the user equipment in a manner corresponding to the transmission scheme and/or the feedback mode information.
  • the method before the sending, by the eNB, the message including the transmission scheme and/or the feedback mode information to the user equipment by using the PDCCH, the method further includes:
  • the base station configures different aperiodic feedback modes by using RRC signaling; and/or, the base station configures different periodic feedback modes by using RRC signaling, including the reporting resource index, the configuration index, and the corresponding reporting index corresponding to the periodic feedback mode. Format information.
  • the method specifically includes:
  • the base station separately configures multiple different aperiodic feedback modes or periodic feedback modes by using multiple sets of RRC signaling; or The base station configures a plurality of different aperiodic feedback modes or periodic feedback modes by using different parameters of a set of RRC signaling.
  • the configuration manner of the transmission scheme and/or the feedback mode information includes: an explicit configuration manner; or,
  • Implicit configuration or,
  • the explicit configuration manner includes:
  • the base station indicates different transmission schemes and/or feedback modes with different switch bits in a message sent to the user equipment through the PDCCH;
  • the base station indicates different transmission schemes and/or feedback modes with different bits in the message transmitted to the user equipment through the PDCCH.
  • the implicit configuration manner includes:
  • the base station indicates different transmission schemes and/or feedback modes in different messages in the message sent to the user equipment through the PDCCH; or
  • the base station indicates different transmission schemes and/or feedback modes with different RNTIs in messages sent to the user equipment through the PDCCH.
  • the explicit and implicit hybrid configuration manners include:
  • the base station indicates different transmission schemes with different switch bits or bits in the message sent to the user equipment through the PDCCH, and indicates different feedback modes with different parameter value ranges or RNTIs.
  • the different parameter value range includes a size or an MCS level of a resource block transmitted in the uplink shared channel when the user equipment transmits control signaling by using an uplink shared channel, and the base station passes the resource.
  • the size of the block or the MCS level distinguishes between different feedback content or feedback types.
  • the base station after receiving the feedback content that is sent by the user equipment according to the manner corresponding to the transmission scheme and/or the feedback mode information, the base station further includes:
  • the base station Determining, by the base station, whether to switch the transmission scheme and/or the feedback mode of the user equipment according to the feedback content; If the base station determines that the handover is required, the transmission scheme is switched after the corresponding feedback content sent by the user equipment is obtained.
  • the base station performs the switching of the transmission scheme after obtaining the corresponding feedback content sent by the user equipment, which specifically includes:
  • the base station directly switches the current transmission scheme to the new transmission scheme; or, the base station determines whether to switch the current transmission scheme to the new transmission scheme according to the feedback content in the preset time range.
  • the base station determines, according to the feedback content in the preset time range, whether to switch the current transmission scheme to the new transmission scheme, including:
  • the base station sets two feedback periods, satisfies the existing transmission scheme with a less expensive feedback period, and satisfies the new transmission scheme with a larger overhead feedback period.
  • the method further includes:
  • the base station indicates, by using the RRC signaling, the feedback of the feedback period with a large overhead, so that the user equipment feeds back according to the configuration of the RRC signaling when the time point of the feedback period with a large overhead is reached;
  • a generating module configured to generate a transmission scheme and/or feedback mode information
  • a sending module configured to send, by using a PDCCH, a message that includes a transmission scheme and/or feedback mode information generated by the generating module to a user equipment;
  • the receiving module is configured to receive feedback content that is fed back by the user equipment according to the manner corresponding to the transmission scheme and/or the feedback mode information.
  • the sending module configures a plurality of different aperiodic feedback modes or periodic feedback modes through different parameters of a set of RRC signaling.
  • the base station further includes:
  • a determining module configured to determine, according to the feedback content received by the receiving module, whether to switch the transmission scheme and/or the feedback mode of the user equipment;
  • the switching module is configured to perform switching of the transmission scheme after the receiving module receives the corresponding feedback content sent by the user equipment, when the determining module determines that the handover is required.
  • the switching module is configured to perform a switching of the transmission scheme after the receiving module receives the corresponding feedback content sent by the user equipment, and specifically includes:
  • the switching module directly switches the current transmission scheme to the new transmission scheme; or, the determining module determines whether to switch the current transmission scheme to the new one according to the feedback content received by the receiving module in the preset time range.
  • the transmission scheme and when the judgment result is yes, the current transmission scheme is switched by the handover module to the new transmission scheme.
  • an embodiment of the present invention further provides a configuration method of a transmission scheme and/or a feedback mode, which specifically includes the following steps:
  • the user equipment receives, by using the PDCCH, a message that is sent by the base station and includes the transmission scheme and/or the feedback mode information.
  • the user equipment feeds back corresponding feedback content to the base station according to the manner corresponding to the transmission scheme and/or the feedback mode information.
  • the user equipment before the user equipment receives the message that is sent by the base station and includes the transmission scheme and/or the feedback mode information, the user equipment further includes:
  • the user equipment receives the aperiodic feedback mode and/or configured by the base station by using RRC signaling,
  • the user equipment receives the periodic feedback mode configured by the base station by using the RRC signaling, and includes the reporting resource index, the configuration index, and the format information corresponding to the periodic feedback mode.
  • the configuration manner of the transmission scheme and/or the feedback mode information includes: an explicit configuration manner; or
  • Implicit configuration or,
  • an embodiment of the present invention further provides a user terminal, including:
  • a receiving module configured to receive, by using a PDCCH, a message that is sent by a base station and includes a transmission scheme and/or feedback mode information
  • An identification module configured to identify a corresponding transmission scheme and/or a feedback mode according to the message received by the receiving module
  • a feedback module configured to feed back corresponding feedback content to the base station according to a transmission scheme and/or a feedback mode identified by the identification module.
  • the receiving module is further configured to receive, by the eNB, a different aperiodic feedback mode by using the RRC signaling; and/or, receive, by the eNB, the different periodic feedback modes, including the period, by using RRC signaling.
  • the reporting resource index, configuration index, and format information corresponding to the feedback mode is further configured to receive, by the eNB, a different aperiodic feedback mode by using the RRC signaling; and/or, receive, by the eNB, the different periodic feedback modes, including the period, by using RRC signaling.
  • the present invention has the following advantages:
  • FIG. 1 is a schematic diagram of multi-cell joint scheduling in the prior art
  • FIG. 3 is a schematic diagram of multi-cell uplink joint reception in the prior art
  • FIG. 4 is a schematic flowchart of a method for configuring a transmission scheme and/or a feedback mode according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart diagram of another method for configuring a transmission scheme and/or a feedback mode according to an embodiment of the present disclosure
  • FIG. 6 is a schematic flowchart diagram of another method for configuring a transmission scheme and/or a feedback mode according to an embodiment of the present invention.
  • FIG. 7 is a schematic flowchart diagram of another method for configuring a transmission scheme and/or a feedback mode according to an embodiment of the present invention.
  • FIG. 8 is a schematic flowchart diagram of another method for configuring a transmission scheme and/or a feedback mode according to an embodiment of the present invention.
  • FIG. 9 is a schematic flowchart diagram of another method for configuring a transmission scheme and/or a feedback mode according to an embodiment of the present invention.
  • FIG. 10 is a schematic flowchart diagram of another method for configuring a transmission scheme and/or a feedback mode according to an embodiment of the present invention.
  • FIG. 11 is a schematic flowchart diagram of another method for configuring a transmission scheme and/or a feedback mode according to an embodiment of the present invention.
  • FIG. 12 is a schematic flowchart diagram of another method for configuring a transmission scheme and/or a feedback mode according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • the prior art uses RRC signaling to notify the transmission scheme and the feedback mode, and cannot quickly switch the transmission scheme and the corresponding feedback type.
  • the main solution adopted by the technical solution proposed by the embodiment of the present invention is to use a physical control channel to display or implicitly notify a transmission scheme or a feedback type.
  • the main technical point of the embodiment of the present invention is that different downlink transmission schemes in the CoMP correspond to different feedback modes, and the feedback content and/or overhead included in the feedback mode are different;
  • different downlink transmission schemes can be dynamically and rapidly switched; wherein, the eNB selects whether to use the CoMP transmission scheme, and which transmission scheme to use, and switches in the following manner:
  • Method 1 Hard handover transmission scheme: When the existing transmission scheme does not meet the performance requirements, the scheme is directly switched.
  • Manner 2 Determine whether to switch the transmission scheme according to the feedback content of a period of time: The method can set two feedback periods, and the shorter period feedback (small overhead) satisfies the needs of the existing transmission scheme, and the longer period feedback ( The overhead is large) to meet the needs of all transmission scenarios.
  • the eNB sets different feedback modes of the UE and configuration parameters such as corresponding periods through RRC signaling, and may add a group of RRC letters in the process of setting multiple feedback modes.
  • the parameters in the command are set, and can also be set by adding multiple sets of RRC signaling.
  • the fast switching of the feedback mode is completed by controlling signaling (such as setting a switch) in the control channel.
  • FIG. 4 is a schematic flowchart of a method for configuring a transmission scheme and/or a feedback mode according to an embodiment of the present invention, where the method specifically includes the following steps:
  • Step S401 The base station sends a message including a transmission scheme and/or feedback mode information to the user equipment by using a PDCCH (Physical Downlink Control Channel).
  • PDCCH Physical Downlink Control Channel
  • the base station configures different aperiodic feedback modes through RRC signaling;
  • the base station configures different periodic feedback modes through RRC signaling, including the reporting resource index, configuration index, and format information corresponding to the periodic feedback mode.
  • the base station separately configures multiple different aperiodic feedback modes or periodic feedback modes through multiple sets of RRC signaling, or configures multiple different parameters through different parameters of a group of RRC signaling.
  • the control signaling of the physical channel completes the configuration of the transmission scheme and/or the feedback mode information by changing an explicit indication and/or an implicit indication of the existing DCI format 0 (downlink control information format 0).
  • the specific instructions are as follows:
  • the base station indicates different transmission schemes and/or feedback modes with different switch bits in the message sent to the user equipment through the PDCCH;
  • the base station indicates different transmission schemes and/or feedback modes with different bits in the message transmitted to the user equipment through the PDCCH.
  • setting the switch bit or bit in DCI format 0 indicates a different CoMP transmission scheme.
  • CS/CBF Coordinated Scheduling/Coordinated Beam Forming
  • JP Joint Processing
  • the manner of feeding back different content is that the feedback type is unchanged, but according to the transmission scheme indicated by the switch bit, the UE knows that the content needs to be fed back differently.
  • RRC needs to increase signaling to notify the number of cells; the feedback type is extended corresponding to the transmission scheme, that is, a new feedback type is added; and the transmission scheme controlled by the latter is corresponding to one or more feedback types.
  • the feedback can be periodic or acyclic.
  • the periodic feedback refers to the type of feedback that can be extended in the case of the PUCCH (Physical Uplink Control Channel), or the feedback of different cells can be distinguished only by the configuration period and the offset (offset), or in the PUSCH case.
  • the type of feedback can be extended, or the feedback of different cells can be distinguished by configuring the period and offset, or the existing feedback type can be reused by the switch bit as above, or the existing feedback type can be reused by the configuration period and offset.
  • the switch bits can also directly indicate different feedback modes.
  • the feedback mode corresponding to the switch bit can be in the same order as the feedback mode of the RRC signaling notification.
  • the CQI request bit is extended (now lbit) to indicate periodic and non-periodic, or CoMP different schemes or different feedback modes.
  • Implicit configuration methods including:
  • the base station indicates different transmission schemes and/or feedback modes in different message parameter ranges in the message sent to the user equipment through the PDCCH;
  • the base station indicates different transmission schemes and/or feedback modes with different RNTIs (Radio Network Temporary Identifiers) in the messages sent to the user equipment through the PDCCH.
  • RNTIs Radio Network Temporary Identifiers
  • the base station indicates different transmission schemes with different switch bits or bit bits in the message sent to the user equipment through the PDCCH, and indicates different feedback modes with different parameter value ranges or RNTIs.
  • the value range of the different parameters includes the size of the resource block transmitted in the uplink shared channel when the user equipment transmits the control signaling through the uplink shared channel.
  • MCS Modulation and Coding Scheme
  • the base station distinguishes different feedback content or feedback type by the size of the resource block or the MCS level.
  • Step S402 The base station receives feedback content that is fed back by the user equipment according to a manner corresponding to the transmission scheme and/or the feedback mode information.
  • Step S403 The base station determines, according to the feedback content, whether the transmission scheme and/or the feedback mode of the user equipment needs to be switched.
  • step S404 is performed;
  • Step S404 The base station performs handover of the transmission scheme after obtaining the corresponding feedback content sent by the user equipment.
  • This step specifically includes the following two situations: Case 1: The base station directly switches the current transmission scheme to the new transmission scheme.
  • Case 2 The base station determines whether to switch the current transmission scheme to the new transmission scheme according to the feedback content in the preset time range.
  • the base station can set two feedback periods, satisfy the existing transmission scheme with a less expensive feedback period, and satisfy the new transmission scheme with a larger overhead feedback period.
  • the base station may further indicate that the feedback period of the feedback period is greater by the RRC signaling, so that the user equipment feeds back according to the configuration of the RRC signaling when the time interval of the feedback period with a large overhead is reached;
  • the configuration of the feedback of the feedback period with a large overhead in the RRC signaling is configured by a switch bit, or a default configuration.
  • the present invention has the following advantages:
  • the embodiment of the present invention provides a configuration method of a transmission scheme and/or a feedback mode.
  • the UE performs aperiodic CQI reporting on the PUSCH, which specifically includes the following steps:
  • Step S501 The eNB notifies the UE to adopt an aperiodic CQ feed mode by using RRC signaling.
  • the configuration of the corresponding specific feedback mode is the same as that of the existing R8 standard, and the format of the RRC signaling is not changed in this embodiment, as shown in Table 1.
  • Step S502 The eNB selects whether to use the transmission scheme of the CoMP. If the transmission scheme of the CoMP is used, the eNB further determines which transmission scheme the UE adopts.
  • Step S503 The eNB sends the setting of the transmission scheme and the feedback mode to the UE by using a downlink physical control channel (PDCCH).
  • PDCH downlink physical control channel
  • the DCI format 0 is further transmitted in the PDCCH in this step to indicate the feedback channel used by the UE in the aperiodic CQL feed mode. Transmission scheme.
  • the CQI request 1 in the DCI format 0 sent by the eNB on the PDCCH indicates that the UE feeds back through the PUSCH.
  • the eNB uses the switch bit in DCI format 0 to indicate the transmission scheme corresponding to the feedback mode.
  • the transmission scheme can be expressed in the form shown in Table 2 below:
  • the occupancy of the bit is lbit, but in this case, only two transmission schemes can be represented. If there are more transmission schemes in the system, it is limited by the bit and cannot be represented. Therefore, Further, the extended bit is used to represent a more detailed transmission scheme, as shown in Table 3:
  • switch bit setting method and the corresponding transmission scheme are only an example given in the embodiment of the present invention for convenience of description. In a specific application scenario, In addition to other switching bits representing the method of the CoMP transmission scheme, this also falls within the scope of the present invention.
  • Step S504 The UE feeds back the feedback content that satisfies the transmission scheme in the PUSCH by using the switch bit set by the DCI format 0.
  • the switch bit set in DCI format 0 is 10, and the UE adopts the scheme of coherent joint transmission. Therefore, as shown in Table 1, the corresponding feedback mode can be mode 3-1, mode 2-2 or mode 1-2.
  • the PMI is a PMI obtained by combining multiple cells, and the CQI can also be understood as a single CQI of the serving cell, or a CQI corresponding to the PMI of multiple cells jointly processed.
  • the corresponding feedback mode may also feed back multiple PMIs corresponding to multiple cells and one complementary PMI corresponding phase calibration, which also belongs to the feedback contents of mode 1-2 and mode 2-2. range.
  • Step S505 The eNB receives the feedback content of the current transmission scheme fed back by the UE.
  • the UE When the eNB refers to the feedback content of the current transmission scheme and considers that the transmission scheme needs to be switched, the UE is required to feed back the feedback content of the new transmission scheme, and then switches to the new transmission scheme after receiving the corresponding feedback content.
  • the present invention has the following advantages:
  • the embodiment of the present invention provides another method for configuring a transmission scheme and/or a feedback mode.
  • the UE performs aperiodic CQI reporting on the PUSCH by using the method. The method includes the following steps:
  • Step S601 The eNB informs the UE by using RRC signaling to adopt a non-periodic CQL feed mode including a new feedback type.
  • the feedback type is extended in this step:
  • the non-periodic CQL feed mode is further added for cooperative scheduling/beamforming.
  • two or more feedback modes may be notified by using one RRC signaling, or separately notified by multiple RRC signalings, and the change of the number of RRC signaling does not affect the protection scope of the present invention.
  • Step S602 The eNB selects whether to use the transmission scheme of CoMP. If the transmission scheme of CoMP is used, the eNB further determines which transmission scheme the UE adopts.
  • Step S603 The eNB sends a setting of a transmission scheme and a feedback mode to the UE through the PDCCH. Similar to the foregoing embodiment, since RRC signaling has been notified in step S601
  • the UE adopts a non-periodic CQ feed mode, so this step is further sent in the PDCCH.
  • DCI format 0 indicates the feedback channel and transmission scheme employed by the UE in the aperiodic CQ feed mode.
  • the CQI request 1 in the DCI format 0 sent by the eNB on the PDCCH indicates that the UE feeds back through the PUSCH.
  • the eNB uses the switch bit in the DCI format 0 to indicate the transmission scheme corresponding to the feedback mode.
  • the form shown in Table 2 above and the more refined one shown in Table 3 can also be used.
  • the form represents the transmission scheme.
  • the switch bits respectively correspond to the above two parameters, for example: Compared with the transmission scheme represented by the form shown in Table 2 above, the switch bit 0 corresponds to cqi-ReportModeAperiodicl, and the switch bit 1 corresponds to cqi-ReportModeAperiodic2.
  • the correspondence between the transmission scheme and the feedback type may be determined by the chronological order of the RRC signaling.
  • switch bit setting method and the corresponding transmission scheme are only an example given in the embodiment of the present invention for convenience of description. In a specific application scenario, other switch bits are not excluded to indicate CoMP transmission. The method of the solution is also within the scope of protection of the present invention.
  • Step S604 The UE feeds back the feedback content that satisfies the transmission scheme in the PUSCH by using the switch bit set by the DCI format 0.
  • the present invention has the following advantages:
  • the embodiment of the present invention provides another method for configuring a transmission scheme and/or a feedback mode.
  • the UE performs periodic CQI reporting on the PUCCH, and specifically includes the following steps:
  • Step S701 The eNB notifies the UE to perform configuration information such as a resource index, a configuration index, and a CQI format corresponding to the periodic CQI reporting by using the RRC signaling.
  • Step S702 The eNB selects whether to use the transmission scheme of the CoMP. If the transmission scheme of the CoMP is used, the eNB further determines which transmission scheme the UE adopts.
  • Step S703 The eNB sends a setting of a transmission scheme and a feedback mode to the UE through the PDCCH. Similar to the foregoing embodiment, since the UE has been notified by the RRC signaling in step S701 to adopt the periodic CQL feed mode, the DCI format 0 is further transmitted in the PDCCH in this step to indicate that the UE is in the periodic CQ feed mode. Feedback channel and transmission scheme adopted.
  • the CQI request in the DCI format 0 sent by the eNB on the PDCCH is not set to 1, which means that the UE does not feed back through the PUSCH, but performs an inversion through the PUCCH.
  • the eNB uses the switch bit in the DCI format 0 to indicate the transmission scheme corresponding to the feedback mode.
  • the form shown in Table 2 above and the more refined one shown in Table 3 can also be used.
  • the form represents the transmission scheme.
  • switch bit setting method and the corresponding transmission scheme are only an example given in the embodiment of the present invention for convenience of description. In a specific application scenario, other switch bits are not excluded to indicate CoMP transmission. The method of the solution is also within the scope of protection of the present invention.
  • Step S704 The UE feeds back the feedback content that satisfies the transmission scheme in the PUCCH by using the switch bit set by the DCI format 0.
  • Step S705 The eNB receives the feedback content of the current transmission scheme fed back by the UE.
  • Step S706 When the eNB refers to the feedback content of the current transmission scheme and considers that the transmission scheme needs to be switched, the UE is required to feed back the feedback content of the new transmission scheme, and then switches to the new transmission scheme after receiving the corresponding feedback content.
  • the decision to switch the transmission scheme can be as follows:
  • Method 1 Hard handover transmission scheme: When the existing transmission scheme does not meet the performance requirements, it directly switches to the new transmission scheme.
  • the preferred switching transmission scheme can be preset.
  • Method 2 Determine whether to switch the transmission scheme according to the feedback content for a period of time.
  • two feedback periods can be set in advance according to the size of the overhead.
  • the short-cycle feedback (small overhead) meets the requirements of the existing transmission scheme
  • the long-cycle feedback (higher overhead) meets the requirements of all transmission schemes. .
  • a single RRC signaling may be added to indicate long-term feedback. Regardless of which short-cycle feedback is switched, when the time of the long-cycle feedback is reached, the UE performs the RRC signaling configuration. Long cycle feedback.
  • the configuration information in the RRC signaling may be indicated by a switch bit or a default configuration.
  • the present invention has the following advantages:
  • the embodiment of the present invention provides another method for configuring a transmission scheme and/or a feedback mode.
  • the UE performs periodic CQI reporting on the PUCCH, and specifically includes the following steps:
  • Step S801 The eNB notifies the UE to perform different feedback modes corresponding to the configuration information such as the resource index, the configuration index, and the CQI format corresponding to the periodic CQI report by using multiple RRCs.
  • cqi-ReportPeriodic1 corresponds to feedback mode A
  • cqi-ReportPeiodic2 corresponds to feedback mode B.
  • Step S802 The eNB selects whether to use the transmission scheme of the CoMP. If the transmission scheme of the CoMP is used, the eNB further determines which transmission scheme the UE adopts.
  • Step S803 The eNB sends a setting of a transmission scheme and a feedback mode to the UE through the PDCCH. Similar to the foregoing embodiment, since the UE has been notified by the RRC signaling to adopt the periodic CQ feed mode in step S801, the DCI format 0 is further transmitted in the PDCCH in this step to indicate that the UE is used in the periodic CQ feed mode. Feedback channel and transmission scheme.
  • the CQI request in the DCI format 0 sent by the eNB on the PDCCH is not set to 1, which means that the UE does not feed back through the PUSCH, but performs an inversion through the PUCCH.
  • the eNB uses the switch bit in the DCI format 0 to indicate the transmission scheme corresponding to the feedback mode.
  • the form shown in Table 2 above and the more refined one shown in Table 3 can also be used.
  • the form represents the transmission scheme.
  • the two switch bits respectively correspond to two RRC signaling, for example:
  • the switch bit 0 corresponds to cqi-ReportPeriodicl
  • the switch bit 1 corresponds to cqi-ReportPeiodic2. Since there are two RRC signaling, the correspondence between the transmission scheme and the feedback type is determined by the transmission time sequence of the RRC signaling.
  • switch bit setting method and the corresponding transmission scheme are only an example given in the embodiment of the present invention for convenience of description. In a specific application scenario, other switch bits are not excluded to indicate CoMP transmission. The method of the solution is also within the scope of protection of the present invention.
  • Step S804 The UE feeds back the feedback content of the transmission scheme in the PUCCH through the switch bit set by the DCI format 0.
  • Step S805 The eNB receives the feedback content of the current transmission scheme fed back by the UE.
  • Step S806 When referring to the feedback content of the current transmission scheme, the eNB considers that the handover scheme needs to be switched, and the UE is required to feed back the feedback content of the new transmission scheme, and then switches to the new transmission scheme after receiving the corresponding feedback content.
  • the decision to switch the transmission scheme can be as follows:
  • Method 1 Hard handover transmission scheme: When the existing transmission scheme does not meet the performance requirements, it directly switches to the new transmission scheme.
  • the preferred switching transmission scheme can be preset.
  • Method 2 Determine whether to switch the transmission scheme according to the feedback content for a period of time.
  • two feedback periods can be set in advance according to the size of the overhead.
  • the short-cycle feedback small overhead
  • the long-cycle feedback higher overhead
  • a single RRC signaling may be added to indicate long-term feedback. Regardless of which short-cycle feedback is switched, when the time of the long-cycle feedback is reached, the UE performs the RRC signaling configuration. Long cycle feedback.
  • the configuration information in the RRC signaling may be indicated by a switch bit or a default configuration.
  • the present invention has the following advantages:
  • the embodiment of the present invention provides another method for configuring a transmission scheme and/or a feedback mode. By applying the method, the UE performs periodic CQI reporting on the PUCCH.
  • steps S901 to S902 and steps S904 to S905 are the same as the embodiment shown in FIG. 7, and steps S1001 to S1002 and steps S1004 to S1005 are the same as the embodiment shown in FIG. 8 described above, and only steps are performed.
  • S903 and step S1003 are different.
  • the CQI request 1 in the DCI format 0 transmitted by the eNB on the PDCCH indicates that the UE performs feedback through the PUSCH.
  • the setting of the CQI-request bit can be used instead of the setting of the switch bit.
  • the manner in which the eNB sends the transmission scheme and the feedback mode to the UE through the PDCCH is no longer set by the switch bit in the DCI format 0, but is differentiated by the extended different bits.
  • the eNB uses the lowest bit of the CQI request in DCI format 0 to represent the feedback channel.
  • the CQI request in the DCI format 0 is marked as 0 or 1 according to whether feedback is performed on the PUSCH, where 1 indicates that the UE performs feedback through the PUSCH, and 0 indicates that the UE performs feedback through the PUCCH.
  • the eNB uses the other bits of the CQI request in the DCI format 0 to indicate the transmission scheme or the feedback type.
  • the usage and the switch bits are the same, and are not described here.
  • the embodiment of the present invention provides another method for configuring a transmission scheme and/or a feedback mode. By applying the method, the eNB may implicitly configure a transmission scheme and/or a feedback mode of the UE.
  • the eNB configures the UE to perform periodic CQL feed on the PUSCH.
  • the method includes the following steps:
  • Step S1101 The eNB notifies the UE to perform different feedback modes corresponding to the configuration information such as the resource index, the configuration index, and the CQI format corresponding to the CQLh>3 ⁇ 4 by the RRC.
  • Step S1102 The eNB selects whether to use the transmission scheme of the CoMP. If the transmission scheme of the CoMP is used, the eNB further determines which transmission scheme the UE adopts.
  • Step S1103 The eNB sends an implicit transmission scheme and a feedback mode setting to the UE through the PDCCH.
  • the DCI format 0 is further transmitted in the PDCCH in this step to indicate that the UE is in the periodic CQ feed mode.
  • the CQI request 1 in the DCI format 0 sent by the eNB on the PDCCH indicates that the UE feeds back through the PUSCH.
  • the implicit configuration of the transmission scheme and the feedback mode includes the following methods:
  • I MCS 30
  • the UE has no data transmission in the PUSCH, and all the transmissions are feedback control information, corresponding to the feedback type B.
  • Manner 3 The eNB sets different RNTIs, the A-RNTI corresponds to the feedback type A or the transmission scheme A, and the B-RNTI corresponds to the feedback type B or the transmission scheme B.
  • Step S1104 The UE feeds back the feedback content that satisfies the transmission scheme in the PUSCH by using the implicitly indicated feedback type or the transmission scheme and the corresponding RRC signaling.
  • Step S1105 The eNB receives the feedback content of the current transmission scheme fed back by the UE.
  • Step S1106 When the eNB refers to the feedback content of the current transmission scheme, it is considered that the handover scheme needs to be switched, and the UE is required to feed back the feedback content of the new transmission scheme, and then switches to the new transmission scheme after receiving the corresponding feedback content.
  • the decision to switch the transmission scheme can be as follows:
  • Method 1 Hard handover transmission scheme: When the existing transmission scheme does not meet the performance requirements, it directly switches to the new transmission scheme.
  • the preferred switching transmission scheme can be preset.
  • Method 2 Determine whether to switch the transmission scheme according to the feedback content for a period of time.
  • two feedback periods can be set in advance according to the size of the overhead.
  • the short-cycle feedback (small overhead) meets the requirements of the existing transmission scheme
  • the long-cycle feedback (higher overhead) meets the requirements of all transmission schemes. .
  • a single RRC signaling may be added to indicate long-term feedback. Regardless of which short-cycle feedback is switched, when the time of the long-cycle feedback is reached, the UE performs the RRC signaling configuration. Long cycle feedback.
  • the configuration information in the RRC signaling It can be indicated by a switch bit or as a default configuration.
  • the present invention has the following advantages:
  • the embodiment of the present invention provides another configuration scheme of a transmission scheme and/or a feedback mode.
  • an eNB may configure a transmission scheme of a UE by using an implicit and explicit hybrid manner. Feedback mode.
  • the eNB configures the UE to perform periodic CQL feed on the PUSCH.
  • the method includes the following steps:
  • Step S1201 The eNB notifies the UE to perform different feedback modes corresponding to the configuration information such as the resource index, the configuration index, and the CQI format corresponding to the periodic CQI reporting by using multiple RRCs.
  • Step S1202 The eNB selects whether to use the transmission scheme of the CoMP. If the transmission scheme of the CoMP is used, the eNB further determines which transmission scheme the UE adopts.
  • Step S1203 The eNB sends, by using a PDCCH, a setting of a transmission scheme and a feedback mode set by implicit and explicit mixing to the UE.
  • the DCI format 0 is further transmitted in the PDCCH in this step to indicate that the UE is in the CQ feed mode of the cycle.
  • the CQI request 1 in the DCI format 0 sent by the eNB on the PDCCH indicates that the UE feeds back through the PUSCH.
  • the eNB indicates the transmission scheme by using switch bits in DCI format 0.
  • the transmission scheme can also be expressed in the form shown in Table 2 above and in the more refined form shown in Table 3.
  • the transmission scheme indicated by the eNB in the DCI format 0 by the switch bit is the transmission scheme A.
  • the implicit configuration of the feedback mode is performed corresponding to the foregoing transmission scheme, and the specific package is Including the following ways:
  • I MCS 30
  • the UE has no data transmission in the PUSCH, and all the transmissions are feedback control information, corresponding to the feedback type B in the transmission scheme A.
  • the transmission scheme indicated by the foregoing switch bit is the transmission scheme B, the two types of settings corresponding to the above two settings are respectively the two feedback types of the transmission scheme B.
  • Manner 3 The eNB sets different RNTIs, and the A-RNTI corresponds to the feedback type A in the transmission scheme A, and the B-RNTI corresponds to the feedback type B in the transmission scheme A. If the transmission scheme indicated by the foregoing switch bit is the transmission scheme B, the above two settings correspond to the two feedback types of the transmission scheme B, respectively.
  • Step S1204 The UE feeds back the feedback content that satisfies the transmission scheme in the PUSCH by using the feedback type or the transmission scheme indicated by the implicit and explicit hybrid manner and the corresponding RRC signaling.
  • Step S1205 The eNB receives the feedback content of the current transmission scheme fed back by the UE.
  • Step S1206 When the eNB refers to the feedback content of the current transmission scheme, it is considered that the handover scheme needs to be switched, and the UE is required to feed back the feedback content of the new transmission scheme, and then switches to the new transmission scheme after receiving the corresponding feedback content.
  • the decision to switch the transmission scheme can be as follows:
  • Method 1 Hard handover transmission scheme: When the existing transmission scheme does not meet the performance requirements, directly switch to the new transmission scheme. In this way, the preferred switching transmission scheme can be preset.
  • Method 2 Determine whether to switch the transmission scheme according to the feedback content for a period of time.
  • two feedback periods can be set in advance according to the size of the overhead.
  • the short-cycle feedback (small overhead) meets the requirements of the existing transmission scheme
  • the long-cycle feedback (higher overhead) meets the requirements of all transmission schemes. .
  • a single RRC signaling may be added to indicate long-term feedback. Regardless of which short-cycle feedback is switched, when the time of the long-cycle feedback is reached, the UE performs the RRC signaling configuration. Long cycle feedback.
  • the configuration information in the RRC signaling may be indicated by a switch bit or a default configuration.
  • the present invention has the following advantages:
  • an embodiment of the present invention further provides a base station, as shown in FIG. 13, including:
  • a generating module 1301, configured to generate a transmission scheme and/or feedback mode information
  • the sending module 1302 is configured to send, by using a PDCCH, a message that includes a transmission scheme and/or feedback mode information generated by the generating module 1301 to the user equipment;
  • the receiving module 1303 is configured to receive feedback content that is fed back by the user equipment according to a manner corresponding to the transmission scheme and/or the feedback mode information.
  • the sending module 1302 is further configured to send a non-periodic feedback mode with different RRC signaling configurations to the user equipment, or send a periodic feedback mode with different RRC signaling configurations to the user equipment, where the CQI reporting corresponding to the periodic feedback mode is included.
  • Resource index, configuration index, and CQI format information are included.
  • the sending module 1302 separately configures a plurality of different non-periodic feedback modes or periodic feedback modes by using multiple sets of RRC signaling; or
  • the sending module 1302 configures a plurality of different aperiodic feedback modes or periodic feedback modes by using different parameters of a set of RRC signaling.
  • the base station further includes:
  • the determining module 1304 is configured to determine, according to the feedback content received by the receiving module 1303, whether to switch the transmission scheme and/or the feedback mode of the user equipment;
  • the switching module 1305 is configured to perform switching of the transmission scheme after the receiving module 1303 receives the corresponding feedback content sent by the user equipment, when the determining module 1304 determines that the handover is required.
  • the switching module 1305 is configured to perform the switching of the transmission scheme after the receiving module receives the corresponding feedback content sent by the user equipment, and specifically includes:
  • the switching module 1305 directly switches the current transmission scheme to the new transmission scheme.
  • the determining module 1304 determines whether to switch the current transmission scheme to the new transmission scheme according to the feedback content received by the receiving module 1303 within the preset time range. And when the judgment result is YES, the current transmission scheme is switched by the switching module 1305 to the new transmission scheme.
  • an embodiment of the present invention further provides a user terminal, including:
  • the receiving module 1401 is configured to receive, by using the PDCCH, a message that is sent by the base station and includes a transmission scheme and/or feedback mode information.
  • the identification module 1402 is configured to identify a corresponding transmission scheme and/or a feedback mode according to the message received by the receiving module 1401.
  • the feedback module 1403 is configured to feed back corresponding feedback content to the base station according to the transmission scheme and/or the feedback mode identified by the identification module 1402.
  • the receiving module 1401 is further configured to receive, by the eNB, a different aperiodic feedback mode by using the RRC signaling; and/or, the receiving base station configures different periodic feedback modes by using the RRC signaling, where the CQI report corresponding to the periodic feedback mode is included.
  • Resource index, configuration index, and CQI format information are included.
  • the present invention has the following advantages:
  • a CD-ROM, a USB flash drive, a mobile hard disk, etc. includes instructions for causing a computer device (which may be a personal computer, a server, or a base station device, etc.) to perform the methods described in various embodiments of the present invention.
  • a computer device which may be a personal computer, a server, or a base station device, etc.
  • modules in the apparatus in the implementation scenario may be distributed in the apparatus for implementing the scenario according to the implementation scenario description, or may be correspondingly changed in one or more devices different from the implementation scenario.
  • the modules of the above implementation scenarios may be combined into one module, or may be further split into multiple sub-modules.

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Abstract

La présente invention se rapporte à un procédé et à un dispositif adaptés pour configurer un schéma de transmission et/ou un mode de rétroaction. Par l'envoi de messages sur un canal de contrôle physique, le mode de rétroaction d'un équipement d'utilisateur (EU) est configuré. Par l'application de la solution technique du mode de réalisation de la présente invention, différents modes de rétroaction correspondant à différents schémas de transmission coordonnée multipoint (CoMP) peuvent être autorisés et des ressources de rétroaction peuvent être mieux sauvegardées. Par ailleurs, comparé à la notification par signaux du contrôle de ressources radio (RRC) de l'art antérieur, le procédé adapté pour paramétrer des commutateurs par le biais du canal de contrôle de la couche physique peut commuter le schéma de transmission et le mode de rétroaction plus rapidement.
PCT/CN2010/076153 2009-08-21 2010-08-19 Procédé et dispositif adaptés pour configurer un schéma de transmission et/ou un mode de rétroaction WO2011020439A1 (fr)

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