WO2012136101A1 - Procédé, système et dispositif pour traiter une requête automatique de répétition hybride - Google Patents

Procédé, système et dispositif pour traiter une requête automatique de répétition hybride Download PDF

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Publication number
WO2012136101A1
WO2012136101A1 PCT/CN2012/072533 CN2012072533W WO2012136101A1 WO 2012136101 A1 WO2012136101 A1 WO 2012136101A1 CN 2012072533 W CN2012072533 W CN 2012072533W WO 2012136101 A1 WO2012136101 A1 WO 2012136101A1
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WIPO (PCT)
Prior art keywords
hybrid automatic
automatic retransmission
terminal
capability
downlink
Prior art date
Application number
PCT/CN2012/072533
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English (en)
Chinese (zh)
Inventor
艾建勋
许英奇
邓云
Original Assignee
中兴通讯股份有限公司
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Publication of WO2012136101A1 publication Critical patent/WO2012136101A1/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
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1893—Physical mapping arrangements

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a hybrid automatic retransmission processing method, system and apparatus.
  • MTC Machine Type Communication
  • the Hybrid Automatic Repeat-ReQuest (HARQ) technology used by the terminal uses the "stop-and-wait" principle, that is, for one HARQ process, one transmission data is sent. After that, it is necessary to wait for the length of the Round Trip Time (RTT) to determine whether the next time the new data is transmitted or the old data is retransmitted, and the length of the RTT is the processing delay and uplink of the terminal and the base station. And the downstream transmission delay is determined.
  • RTT Round Trip Time
  • the processing delay of the terminal can be estimated to be 2 ms
  • the processing delay of the base station can be estimated to be 3 ms
  • the uplink and downlink transmission delays are determined
  • the RTT is determined to be 8 ms.
  • a "stop-and-wait" HARQ implementation method of multiple processes is used, that is, when a HARQ process is stopped, other parallel HARQ processes are initiated to be sufficient.
  • Take advantage of time domain resources. Therefore, in the case of RRT 8ms, it is necessary to initiate 8 uplink HARQ processes and 8 downlink HARQ processes in parallel, so that the time domain resources can be utilized most fully, and the data transmission rate of the terminal is improved.
  • this requires the receiver of the terminal to store 16 data blocks, which requires a large data buffer area and strong service processing capability in the terminal, and is mainly used for low data transmission and high delay tolerance services.
  • the technical problem to be solved by the embodiments of the present invention is to provide a hybrid automatic retransmission processing method and system, and a terminal and a network side device, which reduce the requirements of the terminal for the cache capacity and the requirements for the service processing capability, and reduce the cost of the terminal.
  • an embodiment of the present invention provides a hybrid automatic retransmission processing method, including: a hybrid automatic retransmission processing method, including:
  • the network side device receives the hybrid automatic retransmission capability of the terminal notified by the terminal or an identifier indicating a hybrid automatic retransmission capability;
  • the network side device performs resource scheduling on the terminal according to the hybrid automatic retransmission capability of the terminal.
  • the hybrid automatic retransmission capability means that the terminal has limited downlink hybrid automatic retransmission capability and/or limited uplink hybrid automatic retransmission capability.
  • the limited downlink hybrid automatic retransmission capability includes at least one of the following parameters:
  • the limited uplink hybrid automatic retransmission capability includes at least one of the following parameters:
  • the limited downlink hybrid automatic retransmission capability indicates that the terminal satisfies at least one of the following conditions:
  • the number of parallel downlink hybrid automatic retransmission processes that the terminal can process is lower than the parallel downlink mixing that the terminal can handle in the standard protocol.
  • the feedback time of the downlink hybrid automatic retransmission is higher than the downlink hybrid automatic specified in the standard protocol. Feedback time of retransmission;
  • the loopback time of the downlink hybrid automatic retransmission is higher than the loopback time of the downlink hybrid automatic retransmission specified in the standard protocol;
  • the number of parallel uplink hybrid automatic retransmission processes that the terminal can process is lower than the number of parallel uplink hybrid automatic retransmission processes that the terminal can handle in the standard protocol;
  • the feedback time of the uplink hybrid automatic retransmission is higher than the feedback time of the uplink hybrid automatic retransmission specified in the standard protocol;
  • the loopback time of the uplink hybrid automatic retransmission is higher than the loopback time of the uplink hybrid automatic retransmission specified in the standard protocol.
  • the number of the downlink hybrid automatic retransmission processes that the terminal can process is the number of downlink hybrid automatic retransmission processes that the terminal processes in a loopback time length, or the maximum number of downlink hybrid automatic retransmission processes that the terminal can configure. ;
  • the number of parallel uplink hybrid automatic retransmission processes that the terminal can process is the number of uplink hybrid automatic retransmission processes that the terminal processes in a loopback time length, or the maximum number of uplink hybrid automatic retransmission processes that the terminal can configure. .
  • the terminal transmits the automatic retransmission capability or the identifier notification indicating the hybrid automatic retransmission capability by using the terminal capability information message, the radio resource control connection request message, or the radio resource control connection establishment complete message, or the medium access layer control signaling To the network side device.
  • the identifier indicating the hybrid automatic retransmission capability refers to a low-speed terminal identifier, or a low-cost terminal identifier, or a low-priority terminal identifier.
  • the step of the network side device performing resource scheduling on the terminal according to the hybrid automatic retransmission capability of the terminal includes one or more of the following steps:
  • the network side device is configured according to the number of downlink hybrid automatic retransmission processes of the user equipment. Downstream hybrid automatic retransmission process;
  • the network side device allocates an uplink authorization for feedback to the user equipment according to the feedback time of the downlink hybrid automatic retransmission of the user equipment;
  • the network side device configures an uplink hybrid automatic retransmission process according to the number of uplink hybrid automatic retransmission processes of the user equipment;
  • the network side device sends feedback to the user equipment according to the feedback time of the uplink hybrid automatic retransmission of the user equipment.
  • the embodiment of the invention further provides a processing system for hybrid automatic retransmission, the system comprising a network side device and a terminal,
  • the terminal is configured to notify the network side device of the hybrid automatic retransmission capability or the identifier indicating the hybrid automatic retransmission capability;
  • the network side device is configured to: perform resource scheduling on the terminal according to the hybrid automatic retransmission capability of the terminal.
  • the hybrid automatic retransmission capability means that the terminal has limited downlink hybrid automatic retransmission capability and
  • the limited downlink hybrid automatic retransmission capability includes at least one of the following parameters:
  • the limited uplink hybrid automatic retransmission capability includes at least one of the following parameters:
  • the limited downlink hybrid automatic retransmission capability indicates that the terminal satisfies at least one of the following conditions:
  • the number of parallel downlink hybrid automatic retransmission processes that the terminal can process is lower than the number of parallel downlink hybrid automatic retransmission processes that the terminal can process in the standard protocol;
  • the feedback time of the downlink hybrid automatic retransmission is higher than the feedback time of the downlink hybrid automatic retransmission specified in the standard protocol;
  • the loopback time of the downlink hybrid automatic retransmission is higher than the loopback time of the downlink hybrid automatic retransmission specified in the standard protocol;
  • the number of parallel uplink hybrid automatic retransmission processes that the terminal can process is lower than the number of parallel uplink hybrid automatic retransmission processes that the terminal can handle in the standard protocol;
  • the feedback time of the uplink hybrid automatic retransmission is higher than the feedback time of the uplink hybrid automatic retransmission specified in the standard protocol;
  • the loopback time of the uplink hybrid automatic retransmission is higher than the loopback time of the uplink hybrid automatic retransmission specified in the standard protocol.
  • the network side device is configured to perform resource scheduling on the terminal in one or more of the following manners:
  • the embodiment of the invention further provides a terminal, which includes a capability reporting module,
  • the capability reporting module is configured to: notify the network side device of the hybrid automatic retransmission capability or the identifier indicating the hybrid automatic retransmission capability, so that the network side device performs the automatic retransmission capability according to the terminal
  • the terminal performs resource scheduling.
  • the above terminal can also have the following characteristics:
  • the hybrid automatic retransmission capability means that the terminal has limited downlink hybrid automatic retransmission capability and/or limited uplink hybrid automatic retransmission capability.
  • the limited downlink hybrid automatic retransmission capability includes at least one of the following parameters:
  • the limited uplink hybrid automatic retransmission capability includes at least one of the following parameters:
  • the limited downlink hybrid automatic retransmission capability means that the terminal satisfies at least one of the following conditions:
  • the number of parallel downlink hybrid automatic retransmission processes that the terminal can process is lower than the parallel downlink that the terminal can process according to the standard protocol.
  • the feedback time of the downlink hybrid automatic retransmission is higher than the feedback time of the downlink hybrid automatic retransmission specified in the standard protocol;
  • the loopback time of the downlink hybrid automatic retransmission is higher than the loopback time of the downlink hybrid automatic retransmission specified in the standard protocol;
  • the number of parallel uplink hybrid automatic retransmission processes that the terminal can process is lower than the number of parallel uplink hybrid automatic retransmission processes that the terminal can handle in the standard protocol;
  • the feedback time of the uplink hybrid automatic retransmission is higher than the feedback time of the uplink hybrid automatic retransmission specified in the standard protocol;
  • the loopback time of the uplink hybrid automatic retransmission is higher than the loopback time of the uplink hybrid automatic retransmission specified in the standard protocol.
  • the embodiment of the invention further provides a network side device, which includes:
  • a receiving module configured to: receive, by the terminal, a hybrid automatic retransmission capability of the terminal or an identifier indicating a hybrid automatic retransmission capability;
  • a scheduling module configured to: perform resource scheduling on the terminal according to the hybrid automatic retransmission capability of the terminal.
  • the above network side device may also have the following features:
  • the scheduling module is configured to perform resource scheduling by one or more of the terminals in the following manner:
  • the embodiments of the present invention can reduce the requirements of the terminal for the buffer capacity and the requirements for the service processing capability, thereby reducing the cost of the terminal and facilitating the wide application of the terminal.
  • FIG. 1 is a schematic diagram of a processing method of hybrid automatic retransmission in an embodiment
  • 3 is a flow chart of transmitting data after the terminal reports the hybrid automatic retransmission capability in the first embodiment
  • 4 is a flowchart of a terminal accessing a network in a second embodiment
  • 5 is a flowchart of a terminal accessing a network in a third embodiment
  • FIG. 6 is a schematic structural diagram of a hybrid automatic retransmission processing system in an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a terminal in an embodiment of the present invention
  • FIG. 8 is a schematic structural diagram of a network side device in an embodiment of the present invention.
  • the method for processing the hybrid automatic retransmission in the embodiment of the present invention includes: the terminal notifying the hybrid automatic retransmission capability or the identifier indicating the hybrid automatic retransmission capability to the network side device, where the network side device is configured according to The hybrid automatic retransmission capability of the terminal performs resource scheduling on the terminal.
  • the hybrid automatic retransmission capability means that the terminal has limited downlink hybrid automatic retransmission capability and/or limited uplink hybrid automatic retransmission capability.
  • the limited downlink hybrid automatic retransmission capability includes at least one of the following parameters:
  • the limited uplink hybrid automatic retransmission capability includes at least one of the following parameters:
  • the limited downlink hybrid automatic retransmission capability means that the terminal satisfies at least one of the following conditions:
  • the number of parallel downlink hybrid automatic retransmission processes that the terminal can process is lower than the parallel downlink that the terminal can process according to the standard protocol.
  • the feedback time of the downlink hybrid automatic retransmission is higher than the feedback time of the downlink hybrid automatic retransmission specified in the standard protocol;
  • the loopback time of the downlink hybrid automatic retransmission is higher than the downlink hybrid automatic specified in the standard protocol. Retransmission loopback time;
  • the number of parallel uplink hybrid automatic retransmission processes that the terminal can process is lower than the number of parallel uplink hybrid automatic retransmission processes that the terminal can handle in the standard protocol;
  • the feedback time of the uplink hybrid automatic retransmission is higher than the feedback time of the uplink hybrid automatic retransmission specified in the standard protocol;
  • the loopback time of the uplink hybrid automatic retransmission is higher than the loopback time of the uplink hybrid automatic retransmission specified in the standard protocol.
  • the number of the downlink hybrid automatic retransmission processes that the terminal can process is the number of downlink hybrid automatic retransmission processes that the terminal processes in a loopback time length, or the maximum number of downlink hybrid automatic retransmission processes that the terminal can configure. ;
  • the number of parallel uplink hybrid automatic retransmission processes that the terminal can process is the number of uplink hybrid automatic retransmission processes that the terminal processes in a loopback time length, or the maximum number of uplink hybrid automatic retransmission processes that the terminal can configure. .
  • the terminal When the terminal has limited hybrid automatic retransmission capability, it can simultaneously reduce the requirements for the terminal's caching capability and service processing capability.
  • the terminal transmits the automatic retransmission capability or the identifier notification indicating the hybrid automatic retransmission capability by using the terminal capability information message, the radio resource control connection request message, or the radio resource control connection establishment complete message, or the medium access layer control signaling To the network side device.
  • the above identifier may be a low speed terminal identifier, or a low cost terminal identifier, or a low priority terminal identifier.
  • the protocol needs to specify hybrid automatic retransmission capability information corresponding to the low-speed terminal, the low-cost terminal, or the low-priority terminal identifier, for example, the number of parallel downlink hybrid automatic retransmission processes that the low-speed terminal corresponding terminal can process is 4, or The number of parallel uplink hybrid automatic retransmission processes handled by the low-cost terminal corresponding terminal is 2 or 25%.
  • the base station After receiving the identifier of the low-speed terminal or the low-cost terminal, the base station performs scheduling according to the corresponding hybrid automatic retransmission capability.
  • the network side device performs resource scheduling on the terminal according to the hybrid automatic retransmission capability of the terminal, including one or more of the following:
  • the network side device configures a downlink hybrid automatic retransmission process according to the number of downlink hybrid automatic retransmission processes of the user equipment;
  • the network side device allocates an uplink authorization for feedback to the user equipment according to the feedback time of the downlink hybrid automatic retransmission of the user equipment;
  • the network side device configures an uplink hybrid automatic retransmission process according to the number of uplink hybrid automatic retransmission processes of the user equipment;
  • the network side device sends feedback to the user equipment according to the feedback time of the uplink hybrid automatic retransmission of the user equipment.
  • the terminal notifies the network side device of its hybrid automatic retransmission capability, and the network side device performs resource scheduling on the terminal according to the hybrid automatic retransmission capability.
  • the terminal notifies the network side device of the identifier indicating the hybrid automatic retransmission capability, and the network side device performs resource scheduling on the terminal according to the hybrid automatic retransmission capability corresponding to the identifier (the network side device can learn the information according to the protocol). Identify the corresponding hybrid automatic retransmission capability).
  • the terminal limited hybrid automatic retransmission capability can use one of the following three types:
  • the first type has both a limited downlink hybrid automatic retransmission capability and a limited uplink hybrid automatic retransmission capability;
  • the second type has only limited downlink hybrid automatic retransmission capability
  • the third type has only limited uplink hybrid automatic retransmission capability.
  • the notification method of "notifying the hybrid automatic retransmission capability to the network side device" and the above-mentioned “mixed automatic retransmission capability with limited downlink hybrid automatic retransmission capability and limited uplink hybrid automatic retransmission capability” are used. the way. And, the terminal notifies the network side device of its hybrid automatic retransmission capability through the UE Capability Information in the attaching process.
  • Step 201 The process in which terminal A reports its hybrid automatic retransmission capability to the network side is shown in Figure 2: Step 201: The terminal A initiates a random access procedure in the cell in which it resides, and establishes a radio resource control (RRC) connection.
  • RRC radio resource control
  • Step 202 In the process of establishing an RRC connection, terminal A sends an Attach Request message to the base station, and then, the base station sends the message to the core network.
  • Step 203 The core network sends an initial context setup request to the base station (Initial Context Setup)
  • Step 204 After receiving the initial context setup request message sent by the core network, the base station does not know the terminal A radio access capability information, and sends a terminal capability query (UE Capability Enquiry) message to the terminal A. The terminal A is notified to report its wireless access capability information.
  • UE Capability Enquiry terminal capability query
  • Step 205 The terminal A notifies the base station of the hybrid automatic retransmission capability information to the base station by using a UE Capability Information message.
  • the radio access capability information includes access layer version information, radio frequency parameter information (RF parameters), type information (ue-Category), and the like of the terminal.
  • the terminal adds a cell to the terminal capability information message to indicate its hybrid automatic retransmission capability.
  • the limited hybrid automatic retransmission capability of the terminal includes the limited downlink hybrid automatic retransmission capability and the limited uplink hybrid automatic retransmission capability
  • the limited downlink hybrid automatic retransmission capability reported by the terminal refers to the parallel processing that the terminal can process.
  • the number of downlink hybrid automatic retransmission processes is 4, which is lower than 8 specified by the existing protocol; the limited uplink hybrid automatic retransmission capability reported by the terminal refers to the number of parallel uplink hybrid automatic retransmission processes that the terminal can handle, such as 2. This value is lower than the 8 specified in the existing agreement.
  • the number of parallel HARQ processes supported by the terminal is set to four. Since the downlink of the terminal is asynchronous HARQ, the time domain location of the HARQ process is not limited, but the base station is The duration of a downlink HARQ RTT can only be scheduled on 4 TTIs, that is, downlink data is transmitted on 4 TTIs; in the uplink direction, the number of parallel HARQ processes supported by the terminal is also small, for example, 2 The number of uplink HARQ processes is independent of the number of downlink HARQ processes. Since the terminal uses synchronous HARQ on the uplink, the time domain of the HARQ process is fixed, that is, the HARQ process is located and the uplink grant is received.
  • the weight of Grant is corresponding.
  • two uplink HARQ processes The first TTI and the second TTI in the time length of one uplink HARQ RTT, that is, the TTI in which the uplink HARQ process is located is continuous, and the base station can only schedule the terminal on the two consecutive TTIs (configuration terminal)
  • the uplink grant for sending data that is, the terminal can only send data on these two consecutive ports.
  • Step 206 The base station saves the hybrid automatic retransmission capability of the terminal A for the subsequent resource scheduling of the terminal A, and sends the message to the core network by using a UE Capability Info Indication message.
  • Step 207 The base station sends an RRC Connection Reconfiguration message to the terminal A, and sends an Attach Accept message to the terminal together with the message.
  • Step 208 After receiving the RRC connection reconfiguration message, the terminal A applies the parameters and sends an RRC Connection Reconfiguration Complete message to the base station.
  • Step 209 The base station sends an initial context setup response (Initial Context Setup Response) message to the core network.
  • initial context setup response Initial Context Setup Response
  • Step 210 The terminal A sends an Attach Complete message to the base station, and the base station sends the message to the core network after receiving the message.
  • the terminal A successfully "makes its own hybrid automatic retransmission capability to the network side, and the base station will then release the established RRC connection of the terminal.
  • the terminal A successfully reports its own hybrid automatic.
  • the process of sending or receiving data by terminal A is as shown in Figure 3:
  • Step 301 The terminal A initiates a random access procedure in the cell in which the terminal resides, and establishes an RRC connection.
  • Step 302 In the process of establishing an RRC connection, the terminal A sends a service request (Service Request) message of the NAS layer to the base station, and then, the base station transmits the message to the core network.
  • Service Request Service Request
  • Step 303 The core network sends an Initial Context Setup Request message to the base station, where the message may include the hybrid automatic retransmission capability information of the terminal, where the hybrid automatic retransmission capability information is passed through the previous attach (Attach). Process obtained.
  • Step 304 The base station sends an RRC Connection Reconfiguration (RRC Connection Reconfiguration) message to the terminal A, where the message includes the data radio bearer (DRB) configuration information that the terminal needs to establish.
  • RRC Connection Reconfiguration RRC Connection Reconfiguration
  • Step 305 After receiving the RRC Connection Reconfiguration (RRC Connection Reconfiguration) message, the terminal A applies the parameters and sends an RRC Connection Reconfiguration Complete message to the base station.
  • RRC Connection Reconfiguration RRC Connection Reconfiguration
  • Step 306 After receiving the RRC Connection Reconfiguration Complete message, the base station sends an Initial Context Setup Response message to the core network.
  • the terminal completes the DRB establishment with the base station, and can perform data interaction with the base station.
  • the base station allocates uplink/downlink resources to the terminal according to the hybrid automatic retransmission capability of the terminal obtained in the attaching process, that is, when the base station sends data to the terminal in the downlink, it can only be within one downlink HARQ RTT time length.
  • the terminal is scheduled on the four TTIs, that is, the downlink data is sent on the four downlinks.
  • the base station can only be in the uplink HARQ RTT time length according to the limited HARQ capability of the terminal.
  • the terminal is scheduled on the first TTI and the second TTI, that is, the terminal can only send uplink data on the two TTIs.
  • the base station since the HARQ capability of the terminal is restricted, after the base station learns the HARQ capability of the terminal, the base station performs the HARQ capability in the process of establishing the DRB and during the data transmission using the DRB. Up and down data transmission.
  • the number of HARQ processes is reduced, the processing capability of the terminal can be reduced, and the amount of data to be stored is correspondingly reduced, so that the memory required by the terminal is correspondingly reduced, and the cost of the terminal can be reduced. reduce.
  • the limited hybrid automatic retransmission capability of the terminal may include only the limited downlink hybrid automatic retransmission capability, and the terminal may report the limited downlink hybrid automatic retransmission capability to the base station through the terminal capability information.
  • the finite downlink hybrid automatic retransmission capability may be the feedback time of the downlink hybrid automatic retransmission or the loopback time of the downlink hybrid automatic retransmission, where the feedback time of the downlink hybrid automatic retransmission refers to the base station transmitting data to the terminal.
  • the time T1 is the difference between the time T2 corresponding to the terminal feeding back the ACK/NACK to the base station, that is, the feedback time is equal to T2 - T1
  • the feedback time specified by the existing protocol is 4 milliseconds, where the feedback time of the terminal can exceed 4 milliseconds.
  • the loopback time of the downlink hybrid automatic retransmission can also exceed 8 milliseconds as specified in the protocol.
  • the base station needs to allocate the uplink grant for feedback ACK/NACK to the terminal according to this time. After the feedback time of the downlink hybrid automatic retransmission of the terminal or the loopback time of the downlink hybrid automatic retransmission is extended, the processing capability of the terminal can be reduced, thereby reducing the cost of the terminal.
  • the limited hybrid automatic retransmission capability of the terminal may include only the limited uplink hybrid automatic retransmission capability, and the terminal may report the limited uplink hybrid automatic retransmission capability to the base station by using the terminal capability information.
  • the finite uplink hybrid automatic retransmission capability may be the feedback time of the uplink hybrid automatic retransmission or the loopback time of the uplink hybrid automatic retransmission, and the feedback time may exceed the value specified by the existing protocol, and the uplink hybrid automatic retransmission ring The return time can also exceed the value specified by the existing protocol. Accordingly, the processing capability of such a terminal can be reduced, and the cost can be reduced.
  • the notification method of "notifying the identifier indicating the hybrid automatic retransmission capability to the network side device" is used. And, the terminal notifies the identifier to the network side device by using a RRC Connection Request message.
  • the specific includes:
  • Step 401 The terminal A initiates a random access in the cell in which the terminal resides, and sends an RRC Connection Request message to the base station to which the cell belongs.
  • the terminal A carries an identifier indicating the hybrid automatic retransmission capability in the RRC Connection Request message, and the identifier may be a low-speed terminal identifier, or a low-cost terminal identifier, or It is a low-priority terminal identifier, and a cell may be added in the RRC Connection Request message to carry the identifier.
  • Step 402 The base station performs resource scheduling (including resource allocation) on the terminal according to the hybrid automatic retransmission capability corresponding to the identifier indicating the hybrid automatic retransmission capability, and sends an RRC Connection Setup message to the terminal A.
  • the protocol needs to specify the hybrid automatic retransmission capability corresponding to the speed terminal identifier, the cost terminal identifier, or the priority terminal identifier, such as specifying that the low-cost terminal identifier has a limited downlink mix.
  • the dynamic retransmission capability, or the low priority terminal identifier corresponding to the finite uplink hybrid automatic retransmission capability after the base station receives the identifier of the low speed terminal or the low cost terminal or the low priority terminal, performs resource scheduling according to the corresponding hybrid automatic retransmission capability. .
  • the low-cost terminal identifier of the terminal has a limited downlink hybrid automatic retransmission capability, where the feedback time of the downlink hybrid automatic retransmission is specifically referred to, and the feedback time refers to the base station sending data to the terminal A.
  • the corresponding time T1 is the difference between the time T2 corresponding to the ACK/NACK that the terminal A feeds back to the base station, that is, the feedback time is equal to T2 - T1, and the feedback time specified by the existing protocol is 4 milliseconds. In this embodiment, the feedback time is 6 millisecond.
  • the base station receives the limited downlink hybrid automatic retransmission capability of the terminal A (ie, the feedback time is 6 milliseconds), and the base station needs to allocate the uplink authorization to the terminal A in the subframe of 6 ms interval after transmitting the data to the terminal A.
  • the terminal A feeds back ACK/NACK to the base station.
  • Step 403 After receiving the RRC Connection Setup message, the terminal sends an RRC Connection Setup Complete message to the base station, where the message further includes a service request (Service Request) message sent by the terminal.
  • Service Request Service Request
  • Step 404 After receiving the RRC Connection Setup Complete message, the base station sends a Service Request message to the core network.
  • Step 405 After receiving the service request (Service Request), the core network performs authentication and security establishment on the terminal, and sends an initial context setup request message to the base station, where the base station needs to establish a data connection for the terminal. Enter the quality of service parameters of the DRB, the parameters of the security configuration, and so on.
  • Step 406 The base station establishes a DRB configuration parameter for the terminal, and sends an RRC Connection Reconfiguration (RRC Connection Reconfiguration) message to the terminal.
  • RRC Connection Reconfiguration RRC Connection Reconfiguration
  • Step 407 After receiving the RRC Connection Reconfiguration (RRC Connection Reconfiguration) message, the terminal applies the parameter configuration thereof to send an RRC Connection Reconfiguration Complete message to the base station.
  • RRC Connection Reconfiguration RRC Connection Reconfiguration
  • Step 408 After receiving the RRC Connection Reconfiguration Complete message, the base station sends an Initial Context Setup Response message to the core network. At this point, the terminal completes the DRB establishment with the base station, and can perform data interaction with the base station.
  • the base station since the base station has obtained the identifier indicating the HARQ capability of the terminal in step 401, the base station performs resource allocation for the terminal according to the hybrid automatic retransmission capability corresponding to the identifier.
  • the processing capability requirement of the terminal A can be reduced, and the cost of the terminal can be reduced.
  • the notification method of "notifying the identifier indicating the hybrid automatic retransmission capability to the network side device" is used. And, the terminal notifies the network side device of the identifier indicating the limited hybrid automatic retransmission capability by the RRC Connection Setup Complete message. As shown in Figure 5, the specific includes:
  • Step 501 The terminal A initiates random access in the cell in which the terminal resides, and sends an RRC Connection Request message to the base station to which the cell belongs.
  • Step 502 After receiving the RRC Connection Request message sent by the terminal, the base station sends an RRC Connection Setup message to the terminal A.
  • Step 503 After receiving the RRC Connection Request message, the terminal sends an RRC Connection Setup Complete message to the base station, where the message further includes a service request (Service Request) message sent by the terminal.
  • Service Request Service Request
  • terminal A needs to complete the establishment of the RRC connection (RRC).
  • RRC RRC connection
  • the Connection Setup Complete message carries an identifier indicating the hybrid automatic retransmission capability.
  • the identifier can be a low-speed terminal identifier or a low-cost terminal identifier. It needs to be added in the RRC Connection Setup Complete message.
  • the cell indicates.
  • Step 504 After receiving the RRC connection setup complete message, the base station performs resource scheduling on the terminal according to the hybrid automatic retransmission capability corresponding to the received identifier, and sends a service request (Service Request) message to the core network.
  • Service Request Service Request
  • the HARQ capability of the terminal refers to: an increased RTT time length, that is, a set time length of the uplink HARQ process and/or a downlink HARQ process is larger, that is, by increasing The length of the long RTT gives the terminal a longer service processing time, and does not add parallel uplink HARQ processes and parallel downlink HARQ processes during the extended RTT time.
  • the number of parallel HARQ processes supported by the terminal is the same as that specified by the existing protocol, that is, eight.
  • the time domain location of the HARQ process is not limited, however, The base station can only schedule the terminal on 8 TTIs in the extended downlink HARQ RTT, that is, transmit downlink data on 8 TTIs; in the uplink direction, the number of parallel HARQ processes supported by the terminal is also The protocol specifies the same, that is, eight. Since the terminal uses synchronous HARQ in the uplink, the time domain of the HARQ process is fixed. In this embodiment, the base station can only be in the first 8 TTIs in the extended RTT. The terminal is scheduled.
  • Steps 505-508 are the same as those of 405-408 in the second embodiment.
  • the terminal successfully accesses the network, establishes a DRB with the base station, and can perform data interaction with the network side.
  • the base station Since the base station has obtained the identifier indicating that the terminal has limited HARQ capability in step 503, the base station performs resource allocation for the terminal according to the hybrid automatic retransmission capability corresponding to the identifier.
  • the base station in the downlink, can only schedule the terminal on 8 TTIs in the length of the extended downlink HARQ RTT, that is, transmit downlink data on 8 TTIs, and in the uplink, the base station can only be extended.
  • the terminal is scheduled on the first 8 TTIs in the RTT, that is, the terminal can only send uplink data on the first 8 TTIs in the extended RTT.
  • the processing time of the terminal can be extended, so that the requirements on the terminal processor can be reduced, and the cost of the terminal can be reduced.
  • the hybrid automatic retransmission capability of the terminal in the second embodiment and the third embodiment is sent to the base station by using RRC signaling, and the terminal may also send the medium access control (MAC) control signaling to the base station, which requires A cell representation is added to the existing medium access layer control signaling.
  • MAC medium access control
  • This embodiment describes the LTE system. In fact, it is also applicable to the Wideband Code Division Multiple Access (WCDMA) system.
  • WCDMA Wideband Code Division Multiple Access
  • the network side device is a Radio Network Controller (RNC), and the RNC has processing. The function of RRC signaling.
  • RNC Radio Network Controller
  • the embodiment of the present invention further provides a processing system for hybrid automatic retransmission.
  • the system includes a network side device 60 and a terminal 61.
  • the terminal 61 is set to mix and retransmit automatically
  • the capability or the identifier indicating the hybrid automatic retransmission capability is notified to the network side device; the network side device
  • the network side device may be a base station.
  • the corresponding functions of the terminal and network side devices in the system are the same as described in the following methods.
  • the terminal in the embodiment of the present invention may include a capability reporting module 70, configured to: notify the network side device of the hybrid automatic retransmission capability or the identifier indicating the hybrid automatic retransmission capability, so that the network The side device performs resource scheduling on the terminal according to the hybrid automatic retransmission capability of the terminal.
  • a capability reporting module 70 configured to: notify the network side device of the hybrid automatic retransmission capability or the identifier indicating the hybrid automatic retransmission capability, so that the network The side device performs resource scheduling on the terminal according to the hybrid automatic retransmission capability of the terminal.
  • the network side device in the embodiment of the present invention may include a receiving module 80 and a scheduling module 81, where the receiving module 80 is configured to: receive the hybrid automatic retransmission capability of the terminal sent by the terminal or indicate hybrid automatic
  • the identifier of the retransmission capability is set to 81:
  • the resource scheduling is performed on the terminal according to the hybrid automatic retransmission capability of the terminal.
  • the embodiments of the present invention can reduce the requirements of the terminal for the buffer capacity and the requirements for the service processing capability, thereby reducing the cost of the terminal and facilitating the wide application of the terminal.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)

Abstract

La présente invention se rapporte à un procédé, à un système et à un dispositif adaptés pour traiter une requête automatique de répétition hybride. Le procédé selon l'invention comprend les étapes suivantes : un dispositif sur le côté réseau reçoit une capacité de requête automatique de répétition hybride d'un terminal, la capacité étant notifiée par le terminal ou par un identifiant exprimant la capacité de requête automatique de répétition hybride ; et le dispositif sur le côté réseau programme une ressource pour le terminal sur la base de la capacité de requête automatique de répétition hybride du terminal.
PCT/CN2012/072533 2011-04-02 2012-03-19 Procédé, système et dispositif pour traiter une requête automatique de répétition hybride WO2012136101A1 (fr)

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