WO2011113324A1 - Procédé et nœud relais pour le traitement d'une erreur dans une liaison d'accès radio terrestre sans fil - Google Patents

Procédé et nœud relais pour le traitement d'une erreur dans une liaison d'accès radio terrestre sans fil Download PDF

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Publication number
WO2011113324A1
WO2011113324A1 PCT/CN2011/071493 CN2011071493W WO2011113324A1 WO 2011113324 A1 WO2011113324 A1 WO 2011113324A1 CN 2011071493 W CN2011071493 W CN 2011071493W WO 2011113324 A1 WO2011113324 A1 WO 2011113324A1
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WIPO (PCT)
Prior art keywords
relay node
base station
configuration
backhaul link
integrity protection
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PCT/CN2011/071493
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English (en)
Chinese (zh)
Inventor
邓云
王冠宙
韩立锋
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中兴通讯股份有限公司
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Publication of WO2011113324A1 publication Critical patent/WO2011113324A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a processing method when a backhaul link between a base station and a relay node is erroneous, and a relay node that handles the error.
  • LTE-Advanced Long-Term Evolution advance
  • LTE-Advanced Long-Term Evolution advance
  • UE User Equipment
  • a new relay node (Relay-Node, RN for short) is added between the original base station (eNB), the donor base station (Door-eNB) and the UE. These new RNs and Donor- The eNB performs a radio resource control connection.
  • the radio link between the Donor-eNB and the RN is called a backhaul link, and the radio link between the RN and the UE is called an access link.
  • the downlink data arrives at the Donor-eNB first, and then passes to the RN, which then transmits to the UE, and vice versa.
  • an RN dedicated channel is defined: a Relay-node Physical Downlink Control CHannel (R-PDCCH), and a RN Physical Downlink Shared CHannel (R). -PDSCH) and RN Physical Uplink Shared CHannel (R-PUSCH).
  • R-PDCCH resource may be a partial Orthogonal Frequency Division Multiplexing (OFDM) symbol or all OFDM symbols in a subframe for downlink transmission of the backhaul link.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the base station utilizes the R-PDCCH dynamically or semi-statically
  • the R-PDSCH resource and the R-PUSCH resource are allocated to the relay node, where the R-PDSCH resource is used for transmitting downlink data of the backhaul link, and the R-PUSCH resource is used for transmitting uplink data of the backhaul link.
  • the RN when in the UE connection state, can monitor the downlink assignment (ie, PDSCH resource) indicated by the base station on the Physical Downlink Control Channel (PDCCH) and the uplink grant (ie, the Physical Uplink Control Channel). , referred to as PUCCH and/or Physical Uplink Shared Channel (PUSCH) resources, and implement relay nodes and base stations on the corresponding Physical Downlink Shared Channel (PDSCH) and PUSCH. Data transfer between.
  • the RN when the relay function is enabled in the connection state
  • the relay node indicates the downlink assignment and the uplink grant on the PDCCH of the access link, and implements transmission between the relay node and the user equipment on the corresponding PDSCH and PUSCH, thereby avoiding the relay node and the base station.
  • the transmission between the relay node and the user equipment conflicts with the user equipment.
  • the relay node may be in one of the following states: Idle state: The RN is in an idle state upon initial power-on, and is also in an idle state after the radio link reestablishment fails. When the RN is in an idle state, it has the same or all of the same functions as the UE in the idle state, such as acquiring system information function, measurement function, and cell selection/reselection function.
  • connection state of the UE When the RN is in the connection state of the UE, it has the same or all of the same functions as the UE in the connected state, such as acquiring system information function, measurement function, reporting function, handover function, and between the base station and the RN. A data transmission function or the like is performed through a control channel (PDCCH) and a shared channel (PDSCH or PUSCH).
  • the RN that is in the connection state of the UE does not have the relay function, that is, the user equipment cannot access the network through the local RN.
  • the relay function enables the connection state:
  • the RN has a relay function in this state, that is, the RN has a relay function between the RN and the base station (Donor-eNB), and data transmission between the RN and the UE it manages.
  • the relay function includes: acquiring a system information function, measuring and reporting a measurement report function, a handover function, and using a dedicated control channel (R-PDCCH) and a shared channel (R-PDSCH or R- PUSCH) The function of data transmission, etc.
  • R-PDCCH dedicated control channel
  • R-PDSCH shared channel
  • the relay function When the RN is in the relay function enable connection state, it can also manage the cells belonging to this RN and manage it. UE in this cell. Between the RN and the UE, the relay function includes transmitting the system information function of the RN, managing the measurement process of the UE, managing the handover process of the UE, and passing the control channel (PDCCH) and the shared channel (PDSCH/PUSCH) between the RN and the UE. ) The function of data transmission, etc.
  • the above state name and corresponding definitions only clarify the attributes that the relay node has at different stages. In other documents, the status names may be different, for example, the initial power-on state and the working state, where the initial power-on state includes the idle state described above. And the connection status as the UE.
  • the RN may complete the transition from the idle state to the connection state as the UE through the Radio Resource Control (RRC) connection establishment process, and may also complete the transition from the connection state to the idle state as the UE through the RRC connection release process. Conversion.
  • the access process of the relay node status includes the following:
  • the cell search is performed, the cell under the Donor eNB is selected, and the system message is read, and the relay node is in an idle state. Since the primary purpose of a relay node is to provide service to user equipment within its coverage, the time during which the relay node is idle may be short.
  • the relay node selects a random access prefix according to the random access resource in the system message, initiates a random access, establishes an RRC connection (that is, establishes a Signaling Radio Bearer (SRB)), and then It is authenticated and encrypted by the core network.
  • RRC connection that is, establishes a Signaling Radio Bearer (SRB)
  • the Donor eNB configures a Data Radio Bearer (DRB) for data transmission for the relay node through an RRC connection RRC Connection Reconfiguration.
  • DRB Data Radio Bearer
  • the relay node is in the connection state as the UE, and the relay node needs to monitor the PDCCH delivered by the Donor eNB according to the wireless network allocated by the Donor eNB.
  • the Radio Network Temporary Identifier may include a Cell Radio Network Temporary Identifier (C-RNTI) and a Semi-Persistent Scheduling Radio Network Temporary Identifier (SPS).
  • the relay node can notify the Donor eNB by carrying information in the air interface signaling, and the access node is the relay node instead of the common user equipment, and the Donor eNB can also learn the relay node through the core network.
  • the information obtained by the relay node is obtained, or the information accessed by the relay node is obtained through the operation and maintenance (O&M) server.
  • O&M operation and maintenance
  • the O&M server sends configuration data to the relay node, so that the relay node can implement the relay function to provide services for the user equipment covering the coverage.
  • the downloaded configuration data includes parameter information of the relay node configuring its own system information, such as a Tracking Area Code (TAC), a cell identity (Cell Identity), and a cell selection/reselection parameter, and may also include a relay.
  • TAC Tracking Area Code
  • Cell Identity Cell Identity
  • a relay may also include a relay.
  • the configuration parameters required for the node to be in the relay function enable connection state, such as R-PDCCH configuration information, R-PDSCH configuration information, R-PUSCH configuration information, configuration information of a relay node-specific scheduling request (Scheduling Request), and scheduling
  • the subframe information of the node also referred to as a Fake Multicast Broadcast Single Frequency Network (Fake MBSFN) subframe
  • the relay node After obtaining the configuration information, the relay node initializes the necessary parameters, so as to prepare for providing the cell service by the relay function, the relay node needs to initialize related counters and state variables, and properly configure the system information of the provided cell. When the access link and the backhaul link share the same frequency band, the relay node needs to
  • the Donor-eNB keeps the connection (uplink and downlink in the backhaul link) and on the other hand needs to keep connected with the user equipment (uplink and downlink in the access link), which may cause conflicts handled by the relay node, in order to solve In this problem, the setting of the Fake MBSFN subframe is further introduced in the downlink subframe of the backhaul link.
  • the relay node In the Fake MBSFN subframe, the relay node only receives the signal of the Donor-eNB, and does not send a signal to the user equipment in the access link.
  • the Donor-eNB schedules the relay node with the R-PDCCH.
  • the relay node accesses the Donor-eNB as an ordinary user equipment, and after the network side obtains the identity of the relay node by authenticating, the Donor-eNB adopts the R-PDCCH mode in a specific time slot.
  • the relay node is scheduled, but the Donor-eNB still manages the relay node as if it were a normal user equipment.
  • the relay node needs to comply with the specifications of the ordinary user equipment in the backhaul link.
  • the relay node works normally, it provides services for multiple user devices covering its range, and these user devices are in a connected state or an idle state.
  • the relay node triggers the RRC connection re-establishment process (including cell selection, reading the target cell system message, initiating random access, reconfiguring the SRB, and reconfiguring). DRB), make relay The node cannot properly maintain the connection with its lower user equipment for a long period of time, which may cause communication interruption, which is very unfavorable to the user experience.
  • the technical problem to be solved by the present invention is to provide a method and a relay node for processing a backhaul link error, which avoids communication interruption of user equipment within the coverage of the relay node due to a problem of the backhaul link.
  • the present invention provides a method for processing a backhaul link error, the method comprising: after the relay node determines that a radio link error occurs with a backhaul link between the base stations, continuing to maintain the wireless with the base station Resource control connection.
  • the relay node maintains a radio resource control connection with the base station: the relay node does not trigger a radio resource control connection reestablishment procedure.
  • the wireless link error includes any one of the following errors:
  • the relay node cannot comply with all or part of configuration information sent by the base station, integrity protection failure, random access problem in the backhaul link, and relay
  • the Radio Link Control (RLC) layer of the node reaches the maximum number of retransmissions and the physical layer problem of the backhaul link.
  • RLC Radio Link Control
  • the step of continuing to maintain the radio resource control connection with the base station includes: after the relay node receives the configuration or reconfiguration information of the base station, If it is determined that the relay node cannot comply with all or part of the configuration sent by the base station, maintaining a radio resource control connection with the base station; the method further includes: the relay node notifying the base station that the current configuration occurs error. among them, The step of the relay node notifying the base station that an error occurs in the current configuration includes: the relay node does not send response signaling to the base station; and the base station determines that the response sent by the relay node is not received within a predetermined time.
  • the signaling is considered to be an error in the current configuration; or the step of the relay node notifying the base station that an error occurs in the current configuration includes: the relay node notifying the base station that the configuration fails through the air interface signaling, and The air interface signaling carries the reason for the configuration failure.
  • the base station After receiving the air interface signaling, the base station checks whether the configuration parameter has a problem. If yes, the configuration parameter is modified and then sent to the relay node. , otherwise try to send the configuration parameters again. among them,
  • the reason for the configuration failure includes one or more of the following reasons: the configured parameters are incorrect, the format of the configuration information is incorrect, the data radio bearer (DRB) in the configuration does not exist, and the signaling radio bearer in the configuration ( SRB ) does not exist, the measurement ID in the configuration does not exist, the measurement object in the configuration does not exist, and the measurement structure in the configuration does not exist. among them,
  • the step of continuing to maintain the radio resource control connection with the base station includes: after the relay node receives the data packet, according to the data packet If the integrity of the data packet sent by the base station fails to be determined, the radio resource control connection with the base station is maintained; the method further includes: the relay node notifying the base station that the integrity protection fails.
  • the step of the relay node notifying the base station that the integrity protection fails includes: the relay node sending the integrity protection failure information to the base station by using a dedicated channel of the relay node or air interface signaling on the common control channel.
  • the information includes one or more of the following parameters: the identifier information of the radio bearer, the counter (COUNT) value, and the integrity protection algorithm; or the step of the relay node notifying the base station that the integrity protection fails includes: The relay node notifies the base station integrity protection failure by using an empty integrity protection algorithm on the backhaul link.
  • the method further includes: After the base station learns that the integrity protection fails, the new reconfiguration command is returned to the relay node, where the new reconfiguration command includes configuration parameters of the reconfigured integrity protection algorithm; After the reconfiguration command, integrity protection is implemented according to the reconfigured configuration parameters. among them,
  • the step of continuing to maintain the radio resource control connection with the base station includes: the relay node determines that a random access problem occurs with the backhaul link between the base stations,
  • the radio link control (RLC) layer of the relay node continues to maintain the radio resource control connection with the base station when the radio link control (RLC) layer reaches one of the maximum number of retransmissions and the physical layer problem: the method further includes: the relay node Increase its transmit power in the backhaul link.
  • the method further includes: the base station setting a dedicated transmit power upper limit for the relay node; wherein, the relay node adjusts When the transmit power in the backhaul link is high, the dedicated transmit power upper limit is not exceeded.
  • the method further includes: after the relay node increases its transmit power in the backhaul link, notifying the base station of its state by dedicated signaling.
  • the present invention further provides a relay node that processes a backhaul link error, and the relay node includes: a judging module and a radio resource control connection re-establishment module, where: the judging module is configured to: determine and Whether the radio link error occurs in the backhaul link between the base stations; the radio resource control connection reestablishment module is configured to: when the judging module determines that a radio link error occurs between the backhaul link between the relay node and the base station, does not initiate The radio resource controls the connection re-establishment process.
  • the determining module is configured to determine whether a radio link error occurs between the backhaul link with the base station according to the following manner: after receiving the configuration or reconfiguration information of the base station, if it is determined that the relay node cannot comply with the base All or part of the configuration sent by the station determines that a radio link error occurs with the backhaul link between the base stations; or
  • the radio link control (RLC) layer of the relay node After receiving the data packet, determining, according to the content of the data packet, that the integrity protection of the data packet sent by the base station fails, determining that a radio link error occurs with the backhaul link between the base station; determining that the backhaul link with the base station occurs
  • the radio link control (RLC) layer of the relay node reaches the maximum number of retransmissions, and one of the physical layer problems, it is determined that a radio link error occurs with the backhaul link between the base stations.
  • the relay node further includes a notification module, where: the notification module is configured to: if it is determined that the relay node cannot comply with all or part of the configuration sent by the base station, notify the base station that a radio link error occurs on the backhaul link, or according to The content of the data packet determines that the integrity protection of the data packet sent by the base station fails, and the base station integrity protection is notified to fail.
  • the present invention restores the backhaul link in the shortest possible time, enhances the robustness of the backhaul link, avoids communication interruption, and improves the user experience.
  • FIG. 1 is a schematic diagram of a network structure using a wireless relay technology
  • FIG. 2 is a flowchart of determining and processing a backhaul link error according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic diagram of a backhaul link error according to Embodiment 2 of the present invention
  • Judge and process the flow chart
  • the inventive concept of the present invention is: After the relay node determines that a radio link error occurs with the backhaul link between the base stations, the relay node continues to maintain the radio resource control connection with the base station.
  • the maintaining, by the relay node, the radio resource control connection with the base station refers to: maintaining the backhaul link without triggering a radio resource control connection reestablishment procedure. Since the relay node maintains a radio resource control connection with the base station, UE communication interruption under the relay node can be avoided.
  • the radio link error includes any one of the following errors:
  • the relay node cannot comply with all or part of configuration information sent by the base station, integrity protection failure, random access problem in the backhaul link, and radio link control
  • the (Radio Link Control, RLC for short) layer reaches the maximum number of retransmissions and the physical layer of the backhaul link.
  • the relay node interacts with the base station to repair errors in the backhaul link as much as possible, ensures that the UE communication under the relay node is not interrupted, and enhances the robustness of the backhaul link.
  • the relay node that implements the foregoing method includes: a determining module and a radio resource control connection re-establishment module, where: the determining module is configured to: determine whether a radio link error occurs with a backhaul link between the base station; and the radio resource control connection reestablishment The module is configured to: when the determining module determines that a radio link error occurs in the backhaul link between the relay node and the base station, does not initiate a radio resource control connection reestablishment process.
  • the relay node further includes a notification module, where the notification module is configured to: notify the base station that a backhaul link has a radio link error after a radio link error occurs.
  • the radio link error includes any one of the following errors:
  • the relay node cannot comply with all or part of configuration information sent by the base station, integrity protection failure, random access problem in the backhaul link, and relay node
  • the RLC layer reaches the maximum number of retransmissions and the physical layer problem of the backhaul link.
  • the cell search is performed, the cell under the Donor eNB is selected, and the system message is read, and the relay node is in an idle state.
  • the relay node selects a random access prefix according to the random access resource in the system message, initiates random access, establishes an RRC connection, and then authenticates and encrypts the network side. After the authentication and encryption succeeds, the network side passes the network side.
  • RRC Connection Reconfiguration configures the relay node with a DRB for data transmission.
  • the O&M server sends configuration data to the relay node, so that the relay node can implement the relay function and provide services for the user equipment covering the coverage.
  • the configured configuration data includes one or more of the following parameters: the tracking area code (Tracking Area Code), the cell identity (Cell Identity), and the cell selection/reselection parameters.
  • the parameters may also be sent by the Donor-eNB to the relay node via air interface signaling such as RRC connection reconfiguration).
  • the relay node After obtaining the configuration information, the relay node initializes the necessary parameters to prepare for providing the cell service by the relay function.
  • the relay node needs to initialize related counters and state variables, and reasonably configure the system information of the provided cell.
  • the base station After a period of time, when the relay node completes the initialization work, the base station starts scheduling the relay node in the R-PDCCH mode, and the relay node is in the relay function enable connection state, and can provide services for the user equipment of the lower coverage area. .
  • the Donor eNB manages the relay node like a normal user equipment, including: adding, modifying, or deleting the DRB configuration for it, adding and modifying it Or delete the measurement configuration, establish or release semi-persistent scheduling (SPS) for it, and configure the Medium Access Control (MAC) layer configuration (MAC-MainConfig) for it. Configure the physical layer-specific configuration (physicalConfigDedicated), etc.
  • the Donor eNB implements this function through RRC connection reconfiguration.
  • the Donor eNB can also use other air interface signaling such as: Evolved Universal Terrestrial Radio Access Network (E-UTRAN) system switching command (MobilityFromEUTRACommand), or new signaling, Implement the described configuration.
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • MobilityFromEUTRACommand MobilityFromEUTRACommand
  • Step 210 After the relay node receives the configuration or reconfiguration information of the base station, if the configuration of the base station is incorrect or due to other reasons other than the relay node , so that the relay node cannot comply with the base station transmission "all to ⁇ with" (part of the configuration), it is considered that a wireless link error occurs with the backhaul link between the base stations, The relay node maintains the current backhaul link, that is, does not trigger the RRC Connection Reestablishment; when the partial configuration sent by the base station is correct, the relay node can use the partial configuration without error. If the relay node can comply with the configuration of the base station, it is executed according to the normal flow.
  • Step 220 The relay node notifies the base station that an error occurs in the current configuration.
  • the relay node may notify the base station that the configuration configuration error occurs in one of the following ways:
  • the relay node completes the reconfiguration by not transmitting the response signaling, such as the radio resource control connection ( RRC Connection Reconfiguration Complete)
  • the signaling port is based on the error of the current state.
  • the base station is configured to receive no response within the predetermined time, the default configuration of the configuration is problematic.
  • the air interface signaling notifies the base station that the configuration fails.
  • the specific configuration may be as follows: Partial configuration succeeds, partial configuration fails, or all configuration fails.
  • the reason for the configuration failure may be carried in the air interface signaling, and the specific configuration may be caused by one or more of the following reasons:
  • the configured parameters are incorrect, the format of the configuration information is incorrect, and the DRB in the configuration is configured. It does not exist, the SRB in the configuration does not exist, the measurement identifier in the configuration does not exist, the measurement object in the configuration does not exist, and the measurement structure in the configuration does not exist.
  • the relay node may notify the base station of the configuration failure by using RRC signaling, such as radio resource control connection reconfiguration completion signaling, or new radio resource control connection reconfiguration failure signaling. At this point, the processing of the relay node portion is completed. For the base station, the base station corrects the configuration after learning that the configuration has an error.
  • the base station does not receive the response sent by the relay node within a predetermined time, or after receiving the air interface signaling that fails to be configured, checks whether there is a problem with the parameters of the current configuration. If there is a problem with the configured parameters, If it is modified, it will be resent after modification. This will avoid sending similar configuration information to the relay node in the future. If the configured parameters are correct, there may be a problem in the wireless transmission. You can try to send this part of the configuration information again. If the relay node only informs the base station that the configuration fails, the base station checks all configuration parameters. If the relay node carries the failure cause, the base station checks the part of the configuration that caused the error according to the failure reason.
  • the base station sends signaling to increase the measurement task to the relay node by using the RRC connection reconfiguration, where the measurement identifier includes the measurement object indicated by the measurement identifier and the associated measurement configuration, because the measurement task corresponds to The measurement structure is not defined (the measurement structure is not defined or defined and then deleted).
  • the relay node cannot comply with this configuration.
  • the relay node continues to maintain the radio resource control connection with the serving cell, and does not trigger the radio resource control connection reestablishment. .
  • the relay node may send the signaling of the RRC connection reconfiguration failure to the base station, or include the configuration failure information in the RRC connection reconfiguration complete signaling, and notify the base station that the reconfiguration failure of the newly added measurement task fails.
  • the base station After obtaining the failed information, the base station detects that the information included in the RRC connection reconfiguration signaling is sent to the relay node, and if there is an error, modifies the error configuration, and sends the new configuration information to the relay node again; or is no longer in the middle. The node sends the same configuration information.
  • the determining module in the relay node is further configured to: determine whether the current relay node cannot comply with all or part of the configuration sent by the base station, and if yes, the radio resource control connection re-establishment module does not Initiating a radio resource control connection re-establishment process; further, the relay node further includes a notification module, where the notification module is configured to: when the determining module determines that the relay node cannot comply with all or part of the configuration sent by the base station, The interface signaling notifies the base station that a radio link error has occurred on the backhaul link.
  • the relay node accesses the cell under the Donor eNB, and the relay function is enabled.
  • the relay node listens to the R-PDCCH in the Fake MB SFN subframe of the backhaul link, and the base station has configured a force for the relay node. Ciphering algorithm and integrity protection algorithm.
  • the relay node needs to calculate the X-MAC (ie, Computed MAC-I) of the Protocol Data Unit (PDU), if the calculated X-MAC and the received corresponding data.
  • the message authentication code for Integrity (MAC-I) in the packet is consistent, then the certificate is proved. Integrity protection is successful, otherwise it proves unsuccessful.
  • the parameters for calculating the X-MAC include the counter COUNT value, the direction parameter (DIRECTION), the radio bearer identifier (BEARER), and the key (Key is KRR Cmt or Kupmt).
  • the COUNT value is composed of a Hyper Frame Number (HFN) and a Packet Data Convergence Protocol Sequence Number (PDCP SN).
  • Step 310 After receiving the data packet, the relay node determines, according to the content of the data packet, that the data integrity protection issued by the base station fails, A radio link error occurs between the backhaul link with the base station, and the relay node maintains a radio resource control connection with the serving cell, and does not trigger the radio resource control connection reestablishment; the relay node fails to perform data integrity protection every time the data packet is received. No check. When the relay node judges that the X-MAC of the calculated data packet is consistent with the received MAC-I, the data integrity protection is considered to be successful, and if it is inconsistent, the data integrity protection is considered to be failed.
  • Step 320 The relay node notifies the base station that the backhaul link has a radio link error.
  • the radio link error refers to the integrity protection failure; the relay node passes the air interface signaling or the common control channel on the dedicated channel.
  • the new air interface signaling on the Control Channel reports to the base station the failure of integrity protection failure, such as the failure to send integrity protection.
  • the information includes one of the following integrity protection failures. Or multiple parameters: identification information of the radio bearer, COUNT value, and integrity protection algorithm. Since the uplink is no problem at this time, the relay node can transmit the information of the integrity protection failure to the base station according to the original integrity protection algorithm. At this time, the base station needs to use the same algorithm as the relay node to resolve the relay node. Signaling sent.
  • the relay node notifies the base station integrity protection failure by using a null integrity protection algorithm ('NULL' integrity protection algorithm (eiaO)) on the backhaul link, and using the empty integrity protection algorithm means that the relay node is not applied completely.
  • 'NULL' integrity protection algorithm eiaO
  • the sexual protection algorithm in particular, the relay node uses an empty integrity protection algorithm when transmitting the information of the integrity protection failure or other data, and the base station learns the integrity protection after detecting that the relay node uses the empty integrity protection algorithm. failure. At this point, the processing of the relay node portion is completed.
  • Step 330 After obtaining the integrity protection failure, the base station returns a new reconfiguration signaling to the relay node, where the configuration parameters including the reconfiguration integrity protection algorithm, such as the COUNT value and the new complete, are included. Sexual protection algorithm and the like; Preferably, in other embodiments, the base station may also indicate in the reconfiguration signaling that the relay node does not apply an integrity protection algorithm.
  • Step 340 After receiving the new reconfiguration command, the relay node implements integrity protection according to the newly configured parameters.
  • the relay node detects that the integrity protection fails, and the base station may initiate a security configuration update process to the relay node to send a new algorithm to the relay node, for example, the base station sends an intra-cell handover or a cross-cell handover to the relay node.
  • the new encryption algorithm and integrity protection algorithm are included in the handover command. If the relay node cannot configure (or comply with) the new encryption algorithm and integrity protection algorithm, the relay node still uses the original encryption algorithm and integrity protection algorithm. Maintain communication with the base station.
  • the determining module in the relay node is further configured to: determine whether the integrity protection of the data packet sent by the base station fails, and if yes, the radio resource control connection re-establishment module does not initiate radio resource control.
  • the relay node further includes a notification module, where the notification module is configured to: when the determining module determines that the integrity protection of the data packet sent by the base station fails, the dedicated channel or common control of the relay node The air interface signaling on the channel or by using an empty integrity protection algorithm informs the base station that a radio link error has occurred on the backhaul link, such as transmitting an integrity protection failure message to the base station.
  • the relay node accesses the cell under the Donor eNB, and is in the relay function enable connection state.
  • the relay node detects a random access problem in the backhaul link, that is, the MAC layer detects the maximum number of preamble transmissions in the random access procedure, or the RLC layer of the relay node reaches The problem of the maximum number of retransmissions, or the physical layer problem of the backhaul link (the relay section)
  • the physical layer indicates an error indicated to the RRC layer, for example, the PDCCH has an out-of-sync and the T310 times out, it is considered that a radio link error occurs with the backhaul link between the base station, and the relay node maintains the original cell.
  • the RRC connection does not trigger the RRC connection re-establishment, and the relay node increases its transmit power in the backhaul link, so that the base station can receive the transmit signal power of the relay node and improve the detection effect.
  • the random access problem is an error indicated by the MAC layer to the RRC layer on the relay node, and the problem that the RLC layer reaches the maximum number of retransmissions is an error indicated by the RRC layer to the RLC layer on the relay node.
  • the allowed transmit power upper limit Pmax is broadcast in the existing system message, and all user equipments and relay nodes cannot exceed this upper limit, but in order to avoid the relay node from causing communication interruption due to the problem of the backhaul link Allowing the relay node to increase the transmit power (ie, allow Pmax to be exceeded) when detecting a random access problem in the backhaul link, or a problem in which the RLC layer reaches the maximum number of retransmissions, or a physical layer problem of the backhaul link.
  • the base station sets a dedicated transmit power upper limit for the relay node, and the relay node raises its backhaul chain when it finds a random access problem, or the RLC layer reaches the maximum number of retransmission problems, or the physical layer problem of the backhaul link.
  • the transmit power in the road but not exceeding the dedicated transmit power limit. While improving the signal detection capability of the base station, the user equipment covering the coverage of other base stations will also generate interference. If the interference is serious, the base station can switch the relay node to the adjacent cell.
  • the relay node may improve its own transmit power, in some cases (for example, when the relay node detects that the power of the reference signal transmitted by the base station decreases, or when the physical layer of the backhaul link has a problem)
  • the base station is requested to improve the downlink transmission power through the air interface signaling to ensure the signal transmission quality of the relay node backhaul link, and then the base station can switch the relay node to the adjacent cell to avoid interference to other user equipments.
  • the relay node After the relay node increases the transmit power, it can notify the base station of its status through dedicated signaling, so that the base station can handle this situation in time.
  • the base station can also calculate the path loss by using the measurement report of the serving cell reported by the relay node, thereby indirectly obtaining the condition that the relay node increases the transmission power, and the base station can switch the relay node to the appropriate target cell to prevent the relay node from acting on the other node.
  • User equipment is causing serious interference.
  • the determining module in the relay node is further configured to: determine whether one of the following problems occurs in the backhaul link between the relay node and the base station: a random access problem, the relay node The RLC layer reaches the maximum number of retransmissions and the physical layer problem.
  • the relay node further includes a transmit power adjustment module, the transmit power The adjustment module is configured to: when the determining module determines that the wireless link has the above problem, increase the transmit power in the backhaul link.
  • the present invention restores the backhaul link in the shortest possible time by solving the problems occurring on the backhaul link as much as possible, enhances the robustness of the backhaul link, avoids communication interruption, and improves the user experience.

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

Abstract

La présente invention se rapporte à un procédé pour le traitement d'une erreur dans une liaison d'accès radio terrestre sans fil. Le procédé selon l'invention comprend l'étape suivante : si un nœud relais détermine qu'une erreur de liaison sans fil se produit sur une liaison d'accès radio terrestre sans fil au niveau d'une station de base, il continue à assurer la connexion de contrôle de ressource sans fil avec la station de base. La présente invention se rapporte également à un nœud relais pour le traitement d'une erreur dans une liaison d'accès radio terrestre sans fil. Le nœud relais comprend un module de détermination et un module de rétablissement de connexion de contrôle de ressource sans fil. Selon l'invention, le module de détermination est configuré de façon à déterminer si une erreur de liaison sans fil se produit, ou non, dans la liaison d'accès radio terrestre sans fil au niveau d'une station de base. Selon l'invention également, le module de rétablissement de connexion de contrôle de ressource sans fil est configuré de façon à ce que : quand le module de détermination détermine une erreur de liaison sans fil se produit dans la liaison d'accès radio terrestre sans fil entre le nœud relais et la station de base, une opération de rétablissement de connexion de contrôle de ressource sans fil n'est pas initiée. L'invention permet de renforcer la fiabilité de la liaison d'accès radio terrestre sans fil et améliore l'expérience utilisateur.
PCT/CN2011/071493 2010-03-19 2011-03-03 Procédé et nœud relais pour le traitement d'une erreur dans une liaison d'accès radio terrestre sans fil WO2011113324A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3703407A4 (fr) * 2017-11-10 2020-11-11 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Procédé de transmission d'informations, dispositif de réseau, et dispositif terminal
US11510264B2 (en) * 2016-09-29 2022-11-22 Futurewei Technologies, Inc. System and method for network access using a relay

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102300335B (zh) * 2010-06-22 2016-12-21 中兴通讯股份有限公司 一种处理无线链路错误的方法及装置
CN103686911B (zh) * 2012-09-14 2017-08-04 电信科学技术研究院 一种进行切换的方法和设备
CN108024295B (zh) * 2016-11-03 2022-04-19 中兴通讯股份有限公司 中继转移方法及装置、终端、基站
JP2021509779A (ja) * 2017-11-09 2021-04-01 オッポ広東移動通信有限公司Ｇｕａｎｇｄｏｎｇ Ｏｐｐｏ Ｍｏｂｉｌｅ Ｔｅｌｅｃｏｍｍｕｎｉｃａｔｉｏｎｓ Ｃｏｒｐ．， Ｌｔｄ． データを再送信する方法及び機器
CN109803296B (zh) * 2017-11-17 2021-05-14 华为技术有限公司 信号传输的方法和装置
CN107734541B (zh) * 2017-11-30 2021-02-02 Oppo广东移动通信有限公司 小区切换结果的检测方法及装置、计算机存储介质
KR102322381B1 (ko) * 2018-02-14 2021-11-10 주식회사 케이티 릴레이 노드에서 rrc 메시지를 처리하는 방법 및 그 장치
CN110662240B (zh) * 2018-06-29 2021-08-06 中国移动通信有限公司研究院 发射功率的指示方法、接收方法、网络设备和接入设备
WO2020042010A1 (fr) * 2018-08-29 2020-03-05 北京小米移动软件有限公司 Procédé et appareil d'interdiction de commande d'accès
KR20200031402A (ko) * 2018-09-14 2020-03-24 에스케이하이닉스 주식회사 메모리 시스템 및 그것의 동작방법
CN111278158B (zh) * 2019-01-25 2022-07-22 维沃移动通信有限公司 数据处理方法、消息发送方法及中继节点
WO2021030991A1 (fr) * 2019-08-16 2021-02-25 华为技术有限公司 Procédé et appareil de détermination de ressources de transmission de liaison montante
CN114846904B (zh) * 2019-12-31 2024-04-12 华为技术有限公司 通信方法及装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101039521A (zh) * 2007-02-15 2007-09-19 重庆重邮信科股份有限公司 一种提高移动终端连接保持能力的方法
CN101330298A (zh) * 2007-08-21 2008-12-24 刘西钉 面向多干扰环境应用的跳频fhss无线网络惰性处理方法
WO2010013980A2 (fr) * 2008-08-01 2010-02-04 엘지전자주식회사 Procédé d'affectation de ressources pour liaison terrestre et liaison d'accès dans un système de communication sans fil comprenant un relais

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101039521A (zh) * 2007-02-15 2007-09-19 重庆重邮信科股份有限公司 一种提高移动终端连接保持能力的方法
CN101330298A (zh) * 2007-08-21 2008-12-24 刘西钉 面向多干扰环境应用的跳频fhss无线网络惰性处理方法
WO2010013980A2 (fr) * 2008-08-01 2010-02-04 엘지전자주식회사 Procédé d'affectation de ressources pour liaison terrestre et liaison d'accès dans un système de communication sans fil comprenant un relais

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11510264B2 (en) * 2016-09-29 2022-11-22 Futurewei Technologies, Inc. System and method for network access using a relay
EP3703407A4 (fr) * 2017-11-10 2020-11-11 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Procédé de transmission d'informations, dispositif de réseau, et dispositif terminal
US11553344B2 (en) 2017-11-10 2023-01-10 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Information transmission method, network device and terminal device

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