CN102196496A - Method and relay node for processing errors of backhaul link - Google Patents
Method and relay node for processing errors of backhaul link Download PDFInfo
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- CN102196496A CN102196496A CN2010101570413A CN201010157041A CN102196496A CN 102196496 A CN102196496 A CN 102196496A CN 2010101570413 A CN2010101570413 A CN 2010101570413A CN 201010157041 A CN201010157041 A CN 201010157041A CN 102196496 A CN102196496 A CN 102196496A
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/19—Connection re-establishment
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- 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
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- H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
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Abstract
The invention discloses a method and a relay node for processing errors of a backhaul link, which are used for avoiding UE (user equipment) in a range covered by the relay node from communication interruption due to the errors of the backhaul link. In the method, after the relay node judges that radio link errors occur in the backhaul link between the relay node and a base station, a wireless connection between the relay node and the base station is continuously kept. The method is utilized to recover the backhaul link as soon as possible, thus strengthening the robustness of the backhaul link, avoiding the communication interruption and improving user experience.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to back haul link between base station and the via node when making a mistake processing method and handle this wrong via node.
Background technology
In order to satisfy the demand that growing big bandwidth high-speed mobile inserts, third generation partnership project (Third Generation Partnership Projects, abbreviation 3GPP) releases senior Long Term Evolution (Long-Term Evolution advance is called for short LTE-Advanced) standard.LTE-Advanced is for Long Term Evolution (Long-Term Evolution, abbreviation LTE) evolution of system has kept the core of LTE, adopt a series of technology that frequency domain, spatial domain are expanded on this basis, to reach purposes such as improving the availability of frequency spectrum, increase power system capacity.Wireless relay (Relay) technology promptly is one of technology among the LTE-Advanced, is intended to the coverage of Extended Cell, reduces the area, dead angle in the communication, balanced load, shift the business of hot zones, saving subscriber equipment (User Equipment is called for short UE) is the transmitting power of terminal.As shown in Figure 1, increase some new via nodes (Relay-Node is called for short RN) between original base station (Donor-eNB) and UE, these newly-increased RN and Donor-eNB carry out wireless connections.Wherein, the Radio Link between Donor-eNB and the RN is called back haul link (backhaul link), and the Radio Link between RN and the UE is called access link (access link).Downlink data arrives Donor-eNB earlier, passes to RN then, and RN transfers to UE again, otherwise then up.
In order to dispose the resource of back haul link, defined special-purpose Physical Downlink Control Channel (the Relay-node Physical Downlink Control CHannel of RN, be called for short R-PDCCH), special-purpose Physical Downlink Shared Channel (the Relay-node Physical Downlink Shared CHannel of RN, be called for short R-PDSCH) and the special-purpose Physical Uplink Shared Channel of RN (Relay-node Physical Uplink SharedCHannel is called for short R-PUSCH).The R-PDCCH channel resource can be part of O FDM symbol or the whole OFDM symbol that is used for the subframe of back haul link downlink transfer.The base station utilizes R-PDCCH dynamic or semi-staticly for via node distributes R-PDSCH resource and R-PUSCH resource, and wherein, the R-PDSCH resource is used to transmit the downlink data of back haul link, and the R-PUSCH resource is used to transmit the upstream data of back haul link.RN (as the UE connection status time) can monitor PDCCH and go up the descending assignment (PDSCH resource) of base station indication and uplink authorization (PUCCH and/or PUSCH resource) etc., and at corresponding PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) and PUSCH (Physical Uplink Shared Channel, Physical Uplink Shared Channel) go up to realize transfer of data between via node and the base station.RN (when relay function enables connection status) also can monitor R-PDCCH and go up the descending assignment (R-PDSCH resource) of base station indication and uplink authorization etc., and in the transmission between realization via node and the base station on corresponding R-PDSCH and the R-PUSCH.Simultaneously, via node is indicating downlink assignment and uplink authorization etc. on the PDCCH of access link, and in the transmission that realizes on corresponding PDSCH and the PUSCH between via node and the subscriber equipment, thereby avoid transmission between via node and the base station and the transmission collision between via node and the subscriber equipment.
Via node can be in a kind of in the following state:
Idle condition: RN is in idle condition when initially powering on, also be in idle condition behind the Radio Link reconstruction failure.Have all or part of identical functions with the UE that is in idle condition when RN is in idle condition, as obtain the system information function, measurement function and cell selecting/reselection functionality etc.
When being in as the connection status of UE, the connection status as UE: RN has all or part of identical functions with the UE that is in connection status, as obtain the system information function, measurement function, reporting functions, handoff functionality carries out data-transformation facility etc. by control channel (PDCCH) and shared channel (PDSCH or PUSCH) between base station and RN.The RN that is in as the connection status of UE does not possess relay function, promptly can't make subscriber equipment pass through this RN access network.
Relay function enables connection status: RN possesses relay function under this state, and promptly RN has between RN and base station (Donor-eNB), and the relay function that carries out transfer of data between the UE of RN and its management.Particularly, between base station and RN, relay function comprises and obtains the system information function, measures and the reporting measurement reports function, handoff functionality carries out the function of transfer of data etc. by Dedicated Control Channel (R-PDCCH) and shared channel (R-PDSCH or R-PUSCH).When RN is in relay function and enables connection status, can also manage the sub-district that belongs to this RN, manage the UE in this sub-district.Between RN and UE, relay function comprises the system information function that sends RN, the measuring process of management UE, and the handoff procedure of management UE carries out the function etc. of transfer of data by control channel (PDCCH) and shared channel (PDSCH/PUSCH) between RN and UE.
The attribute that above-mentioned Status Name and corresponding definition only have in different phase for clear and definite via node, Status Name may be different in other documents, for example be initial power-up state and operating state, wherein initial power-up state comprises above-mentioned idle condition and as the connection status of UE.
RN can connect the process of setting up by RRC to be finished from idle condition to the conversion as the connection status of UE, can also connect dispose procedure by RRC, finishes the conversion that is converted to idle condition from the connection status as UE.
The access procedure of via node state comprises following content:
(1) after via node (RN) initially powers on, implement Cell searching, select the sub-district under the Donor eNB, read its system message, this moment, via node was in idle condition.
Because the main purpose of via node is for the subscriber equipment in its coverage provides service, thus via node be in time of idle condition may be very short.
(2) this via node is selected Access Preamble at random according to the random access resource in the system message, initiate to insert at random, set up the RRC connection and (just set up SRB (Signal Radio Bearer, Signaling Radio Bearer)), by core net it is carried out authentication and encryption then, in authentication with after encrypting successfully, Donor eNB connects the Data Radio Bearer (Data Radio Bearer is called for short DRB) of reshuffling (RRC Connection Reconfiguration) and being used for transfer of data for this via node disposes by RRC.In this process, in case the access at random that via node is initiated success, this via node just is in the connection status as UE, this via node need monitor the PDCCH that Donor eNB issues, according to DonoreNB is sign (the Radio Network Temporary Identifier of its distribution, be called for short RNTI, can comprise Cell RNTI, SPS RNTI etc.) detect one's own PDCCH and/or be positioned at the PDSCH of same subframe.Via node can be by carrying information notice Donor eNB in space interface signaling, what this time insert is via node but not domestic consumer's equipment, Donor eNB also can perhaps can also and safeguard (Operation ﹠amp by consistency operation by the information of core net to the authentication acquisition via node access of this via node; Maintenance is called for short O﹠amp; M) server is known the information that via node inserts.
(3) after via node has been set up DRB, O﹠amp; The M server sends configuration data to this via node, so that via node can be realized relay function, for the subscriber equipment of its coverage provides service.Loading of configuration data comprises the parameter information such as the area identification (trackingAreaCode) of via node configuration self system information, the sign of sub-district (Cell Identity), the parameter of cell selecting/gravity treatment may comprise that also via node is in relay function and enables required configuration parameter of connection status such as R-PDCCH configuration information, the R-PDSCH configuration information, the R-PUSCH configuration information, the configuration information of the dispatch request of via node special use (SchedulingRequest), the gap information of dispatching of relays node (corresponding to the Fake MBSFN subframe of access link), the sign that via node is specific etc.After via node obtained these configuration informations, the necessary parameter of initialization was prepared for providing the sub-district to serve with relay function, and via node needs initialization relevant counter, state variable, system information of subdistricts etc. that reasonable disposition provides.
When access link and the shared same frequency range of back haul link, via node need keep being connected (uplink and downlink in the back haul link) with Donor-eNB on the one hand, need again on the other hand to keep being connected (uplink and downlink in the access link) with subscriber equipment, the conflict that this may cause via node to be handled, in order to address this problem, special back haul link descending sub frame configuration Fake MBSFN (the FakeMulticast Broadcast Single Frequency Network that introduces, pseudo-Multicast Broadcast Single Frequency Network) setting, at Fake MBSFN time slot, via node receives only the signal of Donor-eNB, and the subscriber equipment in access link does not send signal.At Fake MBSFN time slot, Donor-eNB is with R-PDCCH dispatching of relays node.
In back haul link, via node is the identity access Donor-eNB with domestic consumer's equipment, after network side is known the identity of via node after by authentication, Donor-eNB is at the mode dispatching of relays node of specific time slot with R-PDCCH, but the Donor-eNB still subscriber equipment of image tube Li Putong equally manages this via node, and via node needs to observe the standard of domestic consumer's equipment in back haul link.When relaying node operate as normal, for a plurality of subscriber equipmenies of its coverage provide service, these subscriber equipmenies are in connection status or idle condition.Yet when back haul link makes a mistake, according to the existing protocol standard, via node can trigger wireless connections reconstruction flow process and (comprise cell selecting, read the Target cell system message, initiate to insert at random, reshuffle SRB, reshuffle DRB), make via node can not keep normally descending being connected of subscriber equipment with it in long period of time, cause communication interruption probably, this is very disadvantageous to user experience.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of method and via node of handling the back haul link mistake, avoids because the problem of back haul link causes the subscriber equipment in the via node coverage communication disruption to occur.
For solving the problems of the technologies described above, the invention provides a kind of method of handling the back haul link mistake, comprising:
After the back haul link generation Radio Link mistake between relay node judges and base station, continue to keep wireless connections with described base station.
Further, the wireless connections kept with described base station of described via node are meant: described via node does not trigger wireless connections and rebuilds flow process.
Further, described Radio Link mistake comprises any in the following mistake: the rlc layer that via node can't be observed the problem that inserts at random in all or part of configuration information that described base station sends, integrity protection failure, the back haul link, via node reaches that maximum times retransmits, the physical layer problem of back haul link.
Further, described method further comprises: after described via node receives the configuration or reconfiguration information of base station, can't observe all or part of configuration that described base station sends if judge this via node, then keep the wireless connections with described base station, and notify this configuration of described base station to make a mistake.
Further, described via node notifies the described base station step that this configuration makes a mistake to comprise: described via node does not send response signaling to described base station; The response signaling of not receiving that in the given time described via node sends is judged in the base station, thinks that then this configuration makes a mistake; Perhaps described via node notifies the described base station step that this configuration makes a mistake to comprise: described via node is by this configuration failure of space interface signaling informing base station, and the reason of carrying configuration failure in described space interface signaling; After described space interface signaling is received in described base station, check whether this configuration parameter has problems, if resend to described via node after then revising configuration parameter, otherwise attempt sending once more configuration parameter.
Further, the reason of described configuration failure comprises one or more in the following reason: the parameter of configuration is incorrect, the form of configuration information is incorrect, the measurement of the Signaling Radio Bearer (SRB) of Data Radio Bearer (DRB) in not existing, dispose in the configuration in not existing, dispose identifies the measurement in not existing, disposing of measuring object in not existing, disposing and construct and do not exist.
Further; described method further comprises: after described via node receives packet; judge the integrity protection failure of the packet that the base station issues according to the content of described packet, then keep the wireless connections with described base station, and notify the integrity protection failure of described base station.
Further, described via node notifies the step of described base station integrity protection failure to comprise: described via node sends the information that integrity protection is failed by the space interface signaling on dedicated channel or the common signal channel to the base station, and described information comprises following one or more parameter: the identification information of radio bearer, counter (COUNT) value, protection algorithm integrallty; Perhaps, described via node is notified the integrity protection failure of described base station by use empty protection algorithm integrallty at back haul link.
Further, new reconfigure command is returned to described via node after knowing the integrity protection failure in described base station, wherein comprises the configuration parameter of the protection algorithm integrallty of reshuffling; After described via node is received new reconfigure command, implement integrity protection according to described configuration parameter of reshuffling.
Further, described method further comprises: when one of following problem appears in the back haul link between relay node judges and base station, continue to keep the wireless connections with described base station, and heighten its transmitting power in back haul link: the rlc layer that inserts problem, described via node at random reaches that maximum times retransmits, physical layer problem.
Further, described base station is that described via node is provided with special-purpose upper limit of emission power, when described via node is heightened its transmitting power in back haul link, is no more than the upper limit of emission power of described special use.
Further, after described via node is heightened its transmitting power in back haul link, by its state of dedicated signaling informing base station.
For solving the problems of the technologies described above, the present invention also provides a kind of via node of handling the back haul link mistake, comprising: judge module and wireless connections rebuilding module, wherein:
Described judge module, be used to judge and the base station between back haul link whether the Radio Link mistake takes place;
Described wireless connections rebuilding module is used for not initiating the wireless connections process of reconstruction when described judge module is judged back haul link generation Radio Link mistake between this via node and base station.
Further, described via node also comprises notification module, be used for back haul link generation Radio Link mistake after, informing base station back haul link generation Radio Link mistake.
Adopt the method for the invention,, in the short as far as possible time, make back haul link recover normal, strengthened the robustness of back haul link, avoid communication interruption, improve user experience by solve the problem that occurs on the back haul link as far as possible.
Description of drawings
Fig. 1 is a schematic network structure of utilizing the wireless relay technology;
Fig. 2 is the judgement and the process chart of back haul link mistake in the embodiment of the invention one;
Fig. 3 is the judgement and the process chart of back haul link mistake in the embodiment of the invention two.
Embodiment
Inventive concept of the present invention is: after the back haul link generation Radio Link mistake between relay node judges and base station, continue to keep the wireless connections with described base station.
The wireless connections that described via node is kept with described base station are meant: keep described back haul link, do not trigger wireless connections and rebuild flow process.
Because via node is kept the wireless connections with the base station, can avoid the UE communication disruption under the via node.
Described Radio Link mistake comprises any in the following mistake: via node can't be observed the problem that inserts at random, rlc layer in all or part of configuration information that described base station sends, integrity protection failure, the back haul link and be reached that maximum times retransmits, the physical layer problem of back haul link.
Via node and base station are repaired the mistake in the back haul link alternately as far as possible, guarantee that the UE communication of via node administration is not interrupted, and strengthen the robustness of back haul link.
The via node of realizing said method comprises: judge module and wireless connections rebuilding module, wherein:
Described judge module, be used to judge and the base station between back haul link whether the Radio Link mistake takes place;
Described wireless connections rebuilding module is used for not initiating the wireless connections process of reconstruction when described judge module is judged back haul link generation Radio Link mistake between this via node and base station.
Preferably, described via node also comprises notification module, be used for back haul link generation Radio Link mistake after, informing base station back haul link generation Radio Link mistake.
Described Radio Link mistake comprises any in the following mistake: the rlc layer that via node can't be observed the problem that inserts at random in all or part of configuration information that described base station sends, integrity protection failure, the back haul link, via node reaches that maximum times retransmits, the physical layer problem of back haul link.
The present invention is described in detail below in conjunction with specific embodiment.
Embodiment one
After via node (RN) initially powers on, implement Cell searching, select the sub-district under the Donor eNB, read its system message, this moment, via node was in idle condition.
This via node is selected Access Preamble at random according to the random access resource in the system message, initiate to insert at random, setting up RRC connects, network side carries out authentication and encryption to it then, in authentication with after encrypting successfully, network side connects by RRC reshuffles (RRC Connection Reconfiguration) is used for transfer of data for this via node configuration DRB.After via node has been set up DRB, O﹠amp; The M server is to this via node down distributing configuration data, so that via node can be realized relay function, for the subscriber equipment of its coverage provides service.The configuration data that issues comprises the one or more of the parameter information of via node configuration self system information such as following information: area identification (trackingAreaCode), the sign of sub-district (Cell Identity), the parameter of cell selecting/gravity treatment may comprise that also via node is in relay function and enables the one or more of required configuration parameter of connection status such as following information: the R-PDCCH configuration information, the R-PDSCH configuration information, the R-PUSCH configuration information, the configuration information of the dispatch request of via node special use (SchedulingRequest), the gap information of dispatching of relays node (corresponding to the Fake MBSFN subframe of access link), the sign that via node is specific etc. (relay function enable the required configuration parameter of connection status also can connect reshuffle by space interface signaling such as RRC send to via node) by Donor-eNB.After via node obtained these configuration informations, the necessary parameter of initialization was prepared for providing the sub-district to serve with relay function, and via node needs initialization relevant counter, state variable, system information of subdistricts etc. that reasonable disposition provides.Spent a period of time, when the relaying node has been finished initial work, the base station begins to dispatch this via node in the mode of R-PDCCH, and via node is in relay function and enables connection status, can for its down the subscriber equipment of coverage service is provided.
After via node is in relay function and enables connection status, at back haul link, Donor eNB is as common subscriber equipment supervisory relay node, be its increase, revise, or the configuration of deletion DRB, be its increase, revise, or configuration is measured in deletion, be its foundation or release semi-persistent scheduling (semi-persistent scheduling, SPS), configuration (MAC-MainConfig) for its configuration MAC layer, for the configuration (physicalConfigDedicated) of its configures physical layer special use etc., Donor eNB connects to reshuffle by RRC and realizes this part function usually.Donor eNB also can realize described configuration as the signaling of switching (MobilityFromEUTRACommand) from the E-UTRAN system or increase newly by other space interface signaling.Above-mentioned deploy content may send in a configuration signal and also may divide many configuration signals to send.
The judgement of back haul link mistake and processing procedure comprise the steps: referring to Fig. 2
The part that sends when the base station disposes when errorless, and via node can use this part that does not make a mistake configuration.If via node can be observed the configuration of base station, then carry out according to normal flow.
Via node one of can be in the following ways this configuration of informing base station make a mistake:
Via node is reshuffled and is finished signaling (RRCConnection Reconfiguration Complete) this configuration of informing base station and make a mistake by not sending response signaling such as wireless connections, this moment, the base station was configured to not receive in the given time response, then gave tacit consent to the configuration existing problems that this time issue;
Via node directly by this configuration failure of space interface signaling informing base station, specifically can be: part configuration successful, part configuration failure or whole configuration failure.Preferably, can carry the reason of configuration failure in space interface signaling, the reason of concrete configuration failure can be one or more in the following reason: the parameter of configuration is incorrect, the form of configuration information is incorrect, the measurement of the SRB of the DRB in the configuration in not existing, dispose in not existing, dispose identifies the measurement in not existing, disposing of measuring object in not existing, disposing and construct and do not exist etc.Via node can be reshuffled by RRC signaling such as wireless connections and be finished signaling or newly-increased this configuration failure of wireless connections reconfiguration failure signaling untill further notice base station.
So far, the via node part finishes dealing with.
For the base station, correct this configuration after knowing that this configuration makes a mistake the base station.Particularly, the base station is not received the response that via node sends in the given time, after perhaps receiving the space interface signaling of configuration failure, check then whether the own parameter of configuration this time has problems, if having problems, the parameter of configuration needs to revise, resend after then revising, send similar configuration information again to via node after can avoiding like this; If the parameter of configuration is correct, then may be to go wrong in the wireless transmission, can attempt sending once more this part configuration information.
If a via node informing base station configuration failure, then all configuration parameters are checked in the base station, if via node has carried failure cause, then wrong that part of configuration is caused according to the failure cause inspection in the base station.
For example, sometime, the base station connects by RRC reshuffles the signaling that sends increase measurement task to via node, comprising measuring sign, measure the measuring object of sign indication and related measurement structure (reporting configuration), because the measurement of this measurement task correspondence structure does not have to define (this measurement structure is deleted again after not defining or defining), via node can not be observed this configuration, via node continues to keep the wireless connections with Serving cell, does not trigger wireless connections and rebuilds.Via node can send RRC to the base station and connect the signaling of reconfiguration failure or connect the information that comprises configuration failure in the signaling of finishing, the reconfiguration failure of this newly-increased measurement task of informing base station of reshuffling at RRC.After the base station obtains the information of failure, detect to via node transmission RRC connection and reshuffle the information that comprises in the signaling,, revise error configurations wherein, send new configuration information to via node once more if there is mistake; Perhaps no longer send identical configuration information to via node.
In the present embodiment, the judge module in the described via node is further used for judging whether this via node can't observe all or part of configuration that described base station sends, if then described wireless connections rebuilding module is not initiated the wireless connections process of reconstruction; Described in addition via node also comprises notification module, is used for when described judge module judges that this via node can't be observed all or part of configuration of described base station transmission, by this back haul link generation Radio Link mistake of space interface signaling informing base station.
Embodiment two
Via node inserts the sub-district under the Donor eNB, is in relay function and enables connection status.Via node is monitored R-PDCCH in the Fake of back haul link MBSFN subframe, the base station has disposed cryptographic algorithm (ciphering algorithm) and protection algorithm integrallty (integrityprotection algorithm) for this via node.At back haul link; as receiving terminal; via node needs calculated data bag PDU (Protocol Data Unit; protocol Data Unit) X-MAC (Computed MAC-I); if MAC-I (the Message AuthenticationCode for Integrity in the X-MAC that calculates and the corresponding data bag of reception; the message integrity identifying code) be consistent, prove that then integrity protection is successful, otherwise proof is unsuccessful.
The parameter of calculating X-MAC comprises counter COUNT value, directioin parameter (DIRECTION), radio bearer sign (BEARER), (Key is K to key
RRCint).Wherein the COUNT value is made of HFN (Hyper Frame Number, Hyper Frame Number) and PDCP SN (Packet Data ConvergenceProtocol Sequence Number, packet data convergence protocol sequence number).
The judgement of back haul link mistake and processing procedure comprise the steps: referring to Fig. 3
Step 310, after via node receives packet, judge data integrity protection's failure that the base station issues according to the content of packet, then think and the base station between back haul link generation Radio Link mistake, via node is kept the wireless connections with Serving cell, does not trigger wireless connections and rebuilds;
Via node receives that whenever packet carries out the inspection that a time whether the data integrity protection fails.
The X-MAC of the packet that calculates when relay node judges is consistent with the MAC-I of reception, then thinks the data integrity protection successfully, otherwise thinks failure.
Via node reports the problem that the integrity protection failure occurs by space interface signaling newly-increased on space interface signaling on the dedicated channel or the common signal channel to the base station; as send the information of integrity protection failure; preferably, in this information, comprise the corresponding one or more parameters of following integrity protection failure: the identification information of radio bearer, COUNT value, protection algorithm integrallty.Because this moment, up link was no problem, via node can be continued to use original protection algorithm integrallty and send the information that integrity protection is failed to the base station, and this moment, the base station need adopt the algorithm identical with via node to resolve the signaling that via node sends.Perhaps; via node is by using empty protection algorithm integrallty (' NULL ' integrityprotection algorithm (eia0)) informing base station integrity protection failure at back haul link; use empty protection algorithm integrallty to be meant not application integrity protection algorithm of via node; particularly; via node uses empty protection algorithm integrallty when the information that sends the integrity protection failure or other data; the integrity protection failure is known in the base station after detecting the empty protection algorithm integrallty of via node use.
So far, the via node part finishes dealing with.
The processing of base station portion is as follows:
Preferably, in other embodiments, not application integrity protection algorithm of via node also can be indicated in the base station in reshuffling signaling.
After step 340, via node are received new reconfigure command, implement integrity protection according to the parameter of new configuration.
Particularly; via node has detected the integrity protection failure; the base station can send to via node with new algorithm to the more new technological process that via node is initiated security configuration; send the switching that the sub-district was changed or striden to intra-cell such as the base station to via node; in switching command, comprise new cryptographic algorithm and protection algorithm integrallty; if via node can not dispose (or observing) new cryptographic algorithm and protection algorithm integrallty, via node still uses original cryptographic algorithm to keep communicating by letter with protection algorithm integrallty and base station.
In the present embodiment, whether the integrity protection of the packet that the judge module in the described via node is further used for judging that the base station issues fails, if then described wireless connections rebuilding module is not initiated the wireless connections process of reconstruction; Described in addition via node also comprises notification module; be used for when described judge module is judged the integrity protection failure of the packet that the base station issues; by the space interface signaling on dedicated channel or the common signal channel or by using empty this back haul link generation Radio Link mistake of protection algorithm integrallty informing base station, as send the information of integrity protection failure to the base station.
Embodiment three
Via node inserts the sub-district under the Donor eNB, is in relay function and enables connection status.When the relaying node detects (the Random access problem of access problem at random in the back haul link, being the MAC Layer Detection in the random access procedure, the pilot tone preamble of maximum times sends), or the rlc layer of described via node reaches the problem that maximum times retransmits, or the physical layer problem of the back haul link (mistake that physical layer is indicated to rrc layer on the via node, for example step-out out-of-sync appears in PDCCH and T310 overtime) time, think and the base station between back haul link generation Radio Link mistake, via node is kept the wireless connections with former sub-district, not triggering wireless connections rebuilds, via node is heightened its transmitting power in back haul link, can make the base station receive that the transmit signal power of via node strengthens, and improves the effect that detects like this.
Described access problem at random is the mistake of MAC course rrc layer indication on the via node, and the problem that described rlc layer reaches the maximum times re-transmission is the mistake that rrc layer is indicated to rlc layer on the via node.
The upper limit of emission power Pmax that broadcasting allows in existing systems message, all subscriber equipmenies and via node can not surpass this upper limit, because the problem of back haul link makes it cover subscriber equipment down but communication disruption appears for fear of via node, allow via node in detecting back haul link the problem that inserts at random or rlc layer reach problem that maximum times retransmits or back haul link physical layer problem the time heighten transmitting power (permission) above Pmax.Perhaps the base station is that via node is provided with special-purpose upper limit of emission power, via node is when finding to insert at random problem or rlc layer and reach the physical layer problem of problem that maximum times retransmits or back haul link, heighten its transmitting power in back haul link, but must not surpass this special-purpose upper limit of emission power.When improving the base station signal detectability, also will produce interference to the subscriber equipment of other base station ranges, if serious interference, the base station can switch to this via node adjacent sub-district.
Need to prove, via node can be in raising self transmitting power, when going wrong (when detecting the power reduction of reference signal of base station as via node or the physical layer of back haul link) in some cases, improve descending transmitting power by space interface signaling request base station, to guarantee the signal transmission quality of via node back haul link, the base station can switch to this via node adjacent sub-district and avoids other subscriber equipment produce is disturbed then.Via node can pass through its state of dedicated signaling informing base station, so that this situation can in time be handled in the base station after improving transmitting power.The measurement report of the Serving cell that the base station also can report by via node calculates path loss, thereby obtain the situation that via node improves transmitted power indirectly, the base station can switch to via node suitable Target cell and prevent that via node from producing serious the interference to other subscriber equipment.
In the present embodiment, judge module in the described via node is further used for judging whether this via node and the back haul link of base station following problem occurs: the rlc layer that inserts problem, described via node at random reaches maximum times re-transmission, physical layer problem, if then described wireless connections rebuilding module is not initiated the wireless connections process of reconstruction; Described in addition via node also comprises the transmitting power adjusting module, is used for heightening the transmitting power in back haul link when described judge module judges that the problems referred to above appear in described Radio Link.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (14)
1. method of handling the back haul link mistake comprises:
After the back haul link generation Radio Link mistake between relay node judges and base station, continue to keep wireless connections with described base station.
2. the method for claim 1 is characterized in that,
The wireless connections that described via node is kept with described base station are meant: described via node does not trigger wireless connections and rebuilds flow process.
3. the method for claim 1 is characterized in that,
Described Radio Link mistake comprises any in the following mistake: the rlc layer that via node can't be observed the problem that inserts at random in all or part of configuration information that described base station sends, integrity protection failure, the back haul link, via node reaches that maximum times retransmits, the physical layer problem of back haul link.
4. as claim 1 or 2 or 3 described methods, it is characterized in that described method further comprises:
After described via node receives the configuration or reconfiguration information of base station, can't observe all or part of configuration that described base station sends, then keep the wireless connections with described base station, and notify this configuration of described base station to make a mistake if judge this via node.
5. method as claimed in claim 4 is characterized in that,
Described via node notifies the described base station step that this configuration makes a mistake to comprise: described via node does not send response signaling to described base station; The response signaling of not receiving that in the given time described via node sends is judged in the base station, thinks that then this configuration makes a mistake; Perhaps
Described via node notifies the described base station step that this configuration makes a mistake to comprise: described via node is by this configuration failure of space interface signaling informing base station, and the reason of carrying configuration failure in described space interface signaling; After described space interface signaling is received in described base station, check whether this configuration parameter has problems, if resend to described via node after then revising configuration parameter, otherwise attempt sending once more configuration parameter.
6. method as claimed in claim 5 is characterized in that,
The reason of described configuration failure comprises one or more in the following reason: the parameter of configuration is incorrect, the form of configuration information is incorrect, the measurement of the Signaling Radio Bearer (SRB) of Data Radio Bearer (DRB) in not existing, dispose in the configuration in not existing, dispose identifies the measurement in not existing, disposing of measuring object in not existing, disposing and construct and do not exist.
7. as claim 1 or 2 or 3 described methods, it is characterized in that described method further comprises:
After described via node receives packet, judge the integrity protection failure of the packet that the base station issues, then keep the wireless connections with described base station, and notify the integrity protection failure of described base station according to the content of described packet.
8. method as claimed in claim 7 is characterized in that,
Described via node notifies the step of described base station integrity protection failure to comprise: described via node sends the information that integrity protection is failed by the space interface signaling on dedicated channel or the common signal channel to the base station, and described information comprises following one or more parameter: the identification information of radio bearer, counter (COUNT) value, protection algorithm integrallty; Perhaps, described via node is notified the integrity protection failure of described base station by use empty protection algorithm integrallty at back haul link.
9. method as claimed in claim 8 is characterized in that,
New reconfigure command is returned to described via node after knowing the integrity protection failure in described base station, wherein comprises the configuration parameter of the protection algorithm integrallty of reshuffling; After described via node is received new reconfigure command, implement integrity protection according to described configuration parameter of reshuffling.
10. as claim 1 or 2 or 3 described methods, it is characterized in that described method further comprises:
When one of following problem appears in the back haul link between relay node judges and base station, continue to keep the wireless connections with described base station, and heighten its transmitting power in back haul link: the rlc layer that inserts problem, described via node at random reaches that maximum times retransmits, physical layer problem.
11. method as claimed in claim 10 is characterized in that,
Described base station is that described via node is provided with special-purpose upper limit of emission power, when described via node is heightened its transmitting power in back haul link, is no more than the upper limit of emission power of described special use.
12. method as claimed in claim 10 is characterized in that,
After described via node is heightened its transmitting power in back haul link, by its state of dedicated signaling informing base station.
13. a via node of handling the back haul link mistake comprises: judge module and wireless connections rebuilding module, wherein:
Described judge module, be used to judge and the base station between back haul link whether the Radio Link mistake takes place;
Described wireless connections rebuilding module is used for not initiating the wireless connections process of reconstruction when described judge module is judged back haul link generation Radio Link mistake between this via node and base station.
14. via node as claimed in claim 13 is characterized in that,
Described via node also comprises notification module, be used for back haul link generation Radio Link mistake after, informing base station back haul link generation Radio Link mistake.
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| CN201010157041.3A CN102196496B (en) | 2010-03-19 | 2010-03-19 | A kind of method and via node of processing errors of backhaul link |
| PCT/CN2011/071493 WO2011113324A1 (en) | 2010-03-19 | 2011-03-03 | Method and relay node for processing backhaul link error |
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| CN201010157041.3A CN102196496B (en) | 2010-03-19 | 2010-03-19 | A kind of method and via node of processing errors of backhaul link |
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| CN102196496B CN102196496B (en) | 2016-05-11 |
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| WO (1) | WO2011113324A1 (en) |
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| WO2021031319A1 (en) * | 2019-08-16 | 2021-02-25 | 华为技术有限公司 | Method and apparatus for determining uplink transmission resource |
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Also Published As
| Publication number | Publication date |
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| WO2011113324A1 (en) | 2011-09-22 |
| CN102196496B (en) | 2016-05-11 |
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