CN101631008B - Method and device for informing load state - Google Patents
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Abstract
The invention discloses a method for informing a load state, which comprises the following steps: when needing to retransmit a medium access control element protocol data unit MAC-e PDU, starting a corresponding enhanced dedicated channel medium access control data E-DCH MAC-d flow retransmission timer in a base station; monitoring the overtime condition of each E-DCH MAC-d flow retransmission timer in the base station; and when meeting the set load state informing condition, informing a control radio network controller CRNC of the load state of the base station. The invention also discloses a corresponding device which is positioned in the base station and comprises an E-DCH MAC-d flow transmission timer unit and an informing unit. The method informs the CRNC of the load state of a Node B to allow the CRNC to know the load state of the Node B in time and combines a control strategy for load balance in time.
Description
Technical field
The present invention relates to method and the device of mobile communication system network load decision domain, particularly a kind of informing load state.
Background technology
TD SDMA access (TD-SCDMA, Time Division Synchronous CodeDivision Multiple Access) network configuration of system as shown in Figure 1, comprise subscriber equipment (UE, User Equipment), universal terrestrial access network (UTRAN, Universal mobiletelecommunications system Territorial Radio Access Network) and core net (CN, CoreNetwork).Wherein, UTRAN is by at least one RNS (RNS, Radio NetworkSubsystem) form, each RNS comprises a radio network controller (RNC, Radio NetworkController) and at least one base station (Node B).Interface between RNC and the CN is the Iu interface, interface between NodeB and the RNC is Iub interface, and the interface that communicates between the RNC is the Iur interface, the agreement of communicating by letter between above-mentioned interface and the interface thereof all defines in 3rd Generation Partnership Project (3GPP, 3rd GenerationPartnership Project) related specifications.RNC is used for distributing and is attached thereto with control or the Radio Resource of relevant Node B, and the data that Node B then finishes the lub interface flow to the conversion of UE, and the while also participates in RRM.Node B comprises one or more residential quarters (CELL) (not shown), littlely divides into two kinds, single-frequency point residential quarter and N frequency point cell.So-called single-frequency point residential quarter refers to, can only configure a carrier frequency in the residential quarter.Because the finite capacity of single-frequency point residential quarter, for the elevator system performance, in the TD-SCDMA system, introduced the characteristic of N frequency point cell, can configure a plurality of carrier frequency in the N frequency point cell, a plurality of carrier frequency are shared common signal channel and Radio Resource, each carrier frequency can hold the UE of some, and the N frequency point cell has increased cell capacity greatly.
In the TD-SCDMA system, the function that in the communication process of certain network and UE, provides according to RNC, RNC is divided into service wireless network controller (SRNC, Serving RNC) and floating radio network controller (DRNC, Drift RNC), wherein, SRNC is for providing wireless connections between UE and the UTRAN; DRNC provides the Radio Resource of the service of reception for UE in the residential quarter of controlling.Communicate by the Iur interface between DRNC and the SRNC.In certain communication of UE, might there be DRNC, may not have DRNC yet, but SRNC is necessarily arranged.
Each RNC controls at least one Node B.From Node B angle, be connected by Iub interface with Node B and the RNC that controls this Node B Radio Resource is called control radio network controller (CRNC, Controlling RNC).CRNC is responsible for RRM is carried out in the residential quarter under the Node B, whole logical resources of all Node B that control is attached thereto.According to the relevant information that UE or Node B report, CRNC carries out system loading control, admits the processing such as control, switching controls by RRM (RRM, Radio Resource Management) module.Wherein the control of CRNC load is the load condition of the residential quarter under the supervision Node B, and processes and block, and makes smoothly the cell load of Node B balanced as far as possible.As required, CRNC may carry out the RRM relevant treatment based on residential quarter or the carrier wave of base station.
The protocol stack structure of Iub interface is divided into two functional layers: wireless network layer and transport network layer, transport network layer are the transmission technology of UTRAN accepted standard, and be irrelevant with the function of UTRAN.As shown in Figure 2, wireless network layer is comprised of Node B applying portion (NBAP, the Node B ApplicationPart) agreement of control plane and the framework agreement (FP, Frame Protocol) of user plane.The NBAP agreement is used for the control signal information between transmission Node B and the CRNC; FP is used for transmitting user data frame and control frame between Node B and CRNC, the transmission of completing user data and user plane control signal.
In order to support high-speed data service, at present in the 7th issue of 3GPP (Release 7) standard, high speed uplink packet access (HSUPA has been proposed, high speed uplink packet access) business: all UE share all code channel resources, by adaptive coding and modulating (AMC, Adaptive Modulationand Coding) and mix request retransmission (HARQ, Hybrid Automatic Repeat Request) technology, the user terminal good for channel circumstance distributes higher speed, and the user terminal poor for channel circumstance distributes lower speed.HARQ carries out between UE and Node B, and Node B sends the feedback of data receiver situation to UE by air interface, and the FP that does not re-use wireless network layer during data re-transmission reports to CRNC, thereby has got around the Iub interface transmission, and back off time significantly shortens.In the HARQ of HSUPA mechanism, also used soft merging (soft combing) and incremental redundancy technology (Incremental Redundancy), improved the transmission accuracy of retransmission data packet may.
At medium access control (MAC, Media Access Control) layer, for the HSUPA data, can be configured to different medium access control data (MAC-d) stream according to service attribute, MAC-d stream is by medium access control element (MAC-e) protocol Data Unit (PDU, Protocol Data Unit) forms, transmit with the form of MAC-d stream at Iub and Iur interface HSUPA data, for a UE, may configure a plurality of MAC-d streams in one data transfer, a plurality of MAC-d streams can carry out multiplexing at the MAC protocol layer according to setting rule.Physical layer between UE and Node B is transmitted the MAC-ePDU of each MAC-d stream, and it is that the MAC layer sends to the upper strata that Node B will receive correct MAC-e PDU in physical layer, and the MAC layer is reduced to MAC-d stream with each MAC-e PDU, then provides to operation layer.The HARQ technology is used for transmission and re-transmission MAC-e PDU between the physical layer between UE and the Node B, and carry out rapid feedback, for guaranteeing the delay requirement of professional transmission, in the 3GPP agreement of existing TD-SCDMA system, difference for each MAC-d flow transmission time of HSUPA business, introduced enhancing dedicated channel (E-DCH, Enhanced Dedicated Channel) MAC-d stream retransmission timer (E-DCHMAC-d Flow Retransmission Timer), E-DCH MAC-d stream retransmission timer is used for the re-transmission time of the MAC-e PDU of this MAC-d stream of calculating, the data of a plurality of MAC-d streams can be multiplexed on the MAC-e PDU, at this moment, the value of E-DCH MAC-d stream retransmission timer is the maximum that multiplexing MAC-d flows the re-transmission time; During for each MAC-d flow transmission, E-DCH MAC-d stream retransmission timer all configures in UE and Node B.
Adopt the physical layer transmission MAC-e PDU of HARQ technology between UE and Node B as shown in Figure 3:
In the UE side, each UE has a HARQ entity, and take UE1 as example, the HARQ entity has N HARQ process (process), and each HARQ process has a process number (process identifier), MAC-e PDU of the each transmission of HARQ process; Each HARQ process comprises re-transmission sequence number (RSN, Retransmission Sequence Number), be used to indicate this time number of retransmissions of the MAC-e PDU of transmission, when MAC-e PDU is new data, be 0, MAC-e PDU when being data retransmission with RSN, RSN increases progressively with certain rule, when the RSN indication reached the maximum retransmission of setting, UE can directly abandon retransmitting this MAC-e PDU.When sending new MAC-e PDU, the HARQ entity of UE distributes a HARQ process that is in idle condition for this MAC-e PDU, the HARQ entity of UE in buffering area store M AC-e PDU and corresponding HARQ process number in order to retransmitting.When receiving affirmation (ACK, the Acknowledgement) order that Node B sends, the MAC-e PDU that stores in the HARQ entity delete buffer of UE also discharges corresponding HARQ process; When receive that Node B sends deny (NACK, Negative Acknowledgment) order the time, retransmit this MAC-e PDU according to the HARQ process number of storage.The MAC-e PDU that retransmits for needs in the E-DCH MAC-d stream retransmission timer module of UE starts an E-DCH MAC-d stream retransmission timer, the traffic set under the MAC-d that this E-DCH MAC-d stream retransmission timer duration configures according to UE flows.When UE receives the NACK order that NodeB sends for certain MAC-e PDU that just passes, need to retransmit this MAC-e PDU, the HARQ entity of UE adopts corresponding this MAC-ePDU of HARQ process transmission according to the record in the buffering area; E-DCH MAC-d stream retransmission timer module starts an E-DCH MAC-d stream retransmission timer simultaneously, according to the MAC-d stream information among the MAC-e PDU that transmits, and the timing duration of the E-DCHMAC-d stream retransmission timer that configuration starts.Within the re-transmission time of setting, the HARQ entity of UE is according to the ACK order or the corresponding MAC-e PDU of NACK command process that receive Node B; If arrive the time of setting, the HARQ entity of UE does not receive corresponding ACK order, be that corresponding MAC-ePDU is not correctly decoded, E-DCH MAC-d stream retransmission timer is overtime to the report of HARQ entity, corresponding MAC-e PDU in the HARQ entity delete buffer, and discharge corresponding HARQ process.When UE receives the ACK order of Node B, be that corresponding MAC-e PDU is correctly decoded, if the corresponding E-DCH MAC-d stream of UE retransmission timer also is in state of activation, then E-DCH MAC-d stream retransmission timer module stops this E-DCH MAC-d stream retransmission timer.
In Node B side, corresponding each UE has a HARQ entity in the HARQ solid element of Node B, be used for receiving the MAC-e PDU that corresponding UE sends: for the MAC-e PDU that correctly receives, to more high-rise transmission, and produce the ACK order feeds back to UE by air interface HARQ entity; Store for receiving wrong MAC-e PDU, and produce the HARQ entity that the NACK order feeds back to corresponding UE, further, receive this MAC-e PDU that UE retransmits, and merge with the MAC-ePDU that receives before.Simultaneously, in the E-DCH MAC-d stream retransmission timer unit of Node B, re-transmission for each MAC-e PDU all can start corresponding E-DCH MAC-d stream retransmission timer, namely when NodeB sends the NACK order to certain MAC-e PDU decoding error that just passes to UE, start corresponding E-DCH MAC-d stream retransmission timer.Because the time of ACK order or NACK command transfer is very short, can think that UE and Node B start self simultaneously for the E-DCH MAC-d stream retransmission timer of same MAC-e PDU, and the timing duration is identical.When this E-DCH MAC-d stream retransmission timer overtime, UE abandons the re-transmission of corresponding MAC-e PDU, can't notify Node B, but Node B is overtime according to self corresponding E-DCH MAC-d stream retransmission timer, can know that UE has abandoned the re-transmission of this MAC-e PDU, thus the MAC-e PDU that preserves before the corresponding HARQ entity deletion of notice Node B.
From the above description as can be known, in the existing protocol, when corresponding E-DCH MAC-d stream retransmission timer stops corresponding MAC-e PDU and transmits with deciding among Node B and the UE, thereby prevent that Node B from not dispatching certain UE for a long time, but number of retransmissions does not also reach the long-time occupied situation of the HARQ process that causes in the situation of maximum retransmission.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and device of informing load state, in time notifies CRNC with the load condition of Node B, can carry out load balance process further to make CRNC.
For achieving the above object, the method for informing load state of the present invention and the technical scheme of device are achieved in that
A kind of method of informing load state, the method comprises:
A, when medium access control element protocol Data Unit MAC-e PDU need to retransmit, start the special channel media access control data E-DCH MAC-d stream retransmission timer of enhancing corresponding in the base station;
The overtime situation of each E-DCH MAC-d stream retransmission timer in B, the monitoring base station is when satisfying the informing load state condition of setting, with the load condition notice control radio network controller CRNC of base station.
Among the step B, by carrying the base station application part NBAP radio link parameter update Indication message of load condition indication information element, with the load condition notice CRNC of base station;
Perhaps, by carrying the NBAP E-DCH traffic load Indication message of load condition indication information element, with the load condition notice CRNC of base station;
Perhaps, by carrying the user plane control frame of E-DCH MAC-d stream retransmission timer time-out information, with the load condition notice CRNC of base station.
The condition of described informing load state is:
The MAC-e PDU that the mixing request retransmission HARQ process of user equipment (UE) is uploaded when the base station decodes unsuccessfully, and described HARQ process uploads new MAC-e PDU, and value minimum overtime in each E-DCH MAC-d stream retransmission timer of base station; Perhaps,
The MAC-e PDU that the HARQ process of UE is uploaded when the base station decodes unsuccessfully, and value maximum overtime in each E-DCH MAC-d stream retransmission timer in the base station.
The condition of described informing load state is:
The MAC-e PDU that the mixing request retransmission HARQ process of user equipment (UE) is uploaded when the base station decodes unsuccessfully, and described HARQ process uploads new MAC-e PDU, and value minimum overtime in each E-DCH MAC-d stream retransmission timer corresponding to UE described in the base station; Perhaps,
The MAC-e PDU that the HARQ process of UE is uploaded when the base station decodes unsuccessfully, and value maximum overtime in each E-DCH MAC-d stream retransmission timer corresponding to UE described in the base station.
The method also comprises congestion threshold is set,
Also be included in the congested value that the base station is set in the NBAP measuring process in the steps A and be the measurement type;
The condition of informing load state described in the step B is the congested value of base station during greater than congestion threshold, measures response message or NBAP measures reporting message by the NBAP that carries the load condition indication information element, with the load condition notice CRNC of base station.
Described congested value is the overtime number of times of E-DCH MAC-d stream retransmission timer in the base station, and the condition that congested value increases is:
The MAC-e PDU that the HARQ process of UE is uploaded when the base station decodes unsuccessfully, and described HARQ process uploads new MAC-e PDU, and value minimum overtime in each E-DCH MAC-d stream retransmission timer of base station; Perhaps,
The MAC-e PDU that the HARQ process of UE is uploaded when the base station decodes unsuccessfully, and value maximum overtime in each E-DCHMAC-d of base station stream retransmission timer.
Described congested value is the overtime number of times of E-DCH MAC-d stream retransmission timer that each UE is corresponding in the base station, and the condition that congested value increases is:
The MAC-e PDU that the HARQ process of UE is uploaded when the base station decodes unsuccessfully, and described HARQ process uploads new MAC-e PDU, and value minimum overtime in each E-DCH MAC-d stream retransmission timer corresponding to UE described in the base station; Perhaps,
The MAC-e PDU that the HARQ process of UE is uploaded when the base station decodes unsuccessfully, and value maximum overtime in each E-DCH MAC-d stream retransmission timer corresponding to UE described in the base station.
The method also comprises report cycle is set,
Also be included in the report cycle that the base station is set in the NBAP public-measurement process in the steps A;
When the condition of informing load state described in the step B was the report cycle arrival, the base station was measured in response message or the NBAP measurement reporting message by NBAP and is carried the load condition information element, with the load condition notice CRNC of base station.
Described NBAP measuring process is NBAP public-measurement process or NBAP special measurement process.
A kind of device of informing load state, this device is arranged in the base station, comprises E-DCH MAC-d stream retransmission timer unit and notification unit, wherein,
E-DCH MAC-d stream retransmission timer unit is used for when MAC-e PDU need to retransmit, and starts corresponding E-DCH MAC-d stream retransmission timer;
Notification unit is used for the overtime situation of each E-DCH MAC-d stream retransmission timer of monitoring, when satisfying the informing load state condition of setting, with the load condition notice CRNC of base station.
Described notification unit comprises monitoring modular and message module,
Monitoring modular is used for the overtime situation of each E-DCH MAC-d stream retransmission timer of statistics; Send the overtime situation of E-DCH MAC-d stream retransmission timer to message module according to the condition of the informing load state of setting;
Message module is used for by NBAP radio link parameter update Indication message or the NBAP E-DCH traffic load Indication message that carries the load condition indication information element that carries the load condition indication information element or carries the user plane control frame that E-DCH MAC-d flows the retransmission timer time-out information, with the load condition notice CRNC of base station.
Described notification unit is that NBAP measures entity, is used for the congested value of accounting base-station; When satisfying the condition of the informing load state of setting, measure reporting message with the load condition notice CRNC of base station by NBAP measurement response message or the NBAP that carries the load condition information element.
The condition of described informing load state is: the report cycle of setting arrives, and perhaps, the congested value of base station is greater than setting thresholding.
It is NBAP public-measurement entity or NBAP special measurement entity that described NBAP measures entity.
The present invention arranges Node B to the condition of CRNC informing load state according to different demands, by in existing NBAP radio link parameter update indication (Radio Link Parameter UpdateIndication) message, carrying the load condition indication information element, perhaps construct the brand-new NBAP E-DCH traffic load Indication message that carries load condition indication (Traffic Load Indication) information element, perhaps construct the brand-new load condition indication information element user plane control frame that carries, with the load condition notice CRNC of Node B.Can also be in the congested value by increase Node B in the NBAP measuring process, NBAP measurement response or NBAP that the load condition indication information element is carried in employing measure reporting message with the load condition notice CRNC of Node B, so that CRNC in time understands the load condition of Node B, in time carry out load balancing in conjunction with control strategy.
Description of drawings
Fig. 1 is the schematic network structure of existing TD-SCDMA system;
Fig. 2 is the wireless network layer schematic diagram of existing Iub interface;
Fig. 3 is existing HARQ technical transmission schematic diagram;
Fig. 4 is the flow chart of method first embodiment of informing load state of the present invention;
Fig. 5 is the flow chart of method second embodiment of informing load state of the present invention;
Fig. 6 is the structural representation of device first embodiment of informing load state of the present invention;
Fig. 7 is the structural representation of device second embodiment of informing load state of the present invention.
Embodiment
Since when E-DCH MAC-d stream retransmission timer can be controlled MAC-e PDU transmission to the situation that takies of the system resources such as buffering area of HARQ entity, thereby reacted to a certain extent the load condition of Node B.The present invention adopts the overtime situation of E-DCH MAC-d stream retransmission timer to reflect self loading of Node B, and when satisfying certain condition, is reported to CRNC by Node B, so that CRNC carries out load balancing control.Particularly when the larger generation of traffic load in the system is congested, cause E-DCH MAC-d stream retransmission timer is overtime and take place frequently, Node B reports the load condition that this moment, E-DCH MAC-d stream retransmission timer reacted to CRNC, CRNC can carry out such as traffic load adjustment, the balanced control of new user's access limitation even load with reference to this situation and according to setting strategy, in time persuasion system is congested, meets consumers' demand.
Below in conjunction with specific embodiments and the drawings the present invention is elaborated.
The ratio that MAC-e PDU transmission occupies Node B traffic load is very large, and each MAC-e PDU bust this, need to retransmit generally to guarantee that Node B receives correct, do not limit if MAC-e PDU is not retransmitted, professional service quality (QoS, Quality of Service) delay requirement in can't satisfy, and can cause simultaneously the overall decline of systematic function.Usually, maximum retransmission and E-DCH MAC-d stream retransmission timer is the important parameter that restriction MAC-e PDU retransmits.And then some particular case that Node B retransmits according to MAC-ePDU can be adjusted the traffic load of self, and reports to CRNC.
In the first embodiment of the invention, Node B to CRNC informing load state condition setting is:
The MAC-e PDU that certain HARQ process of UE is uploaded as Node B decodes unsuccessfully, and RSN and HARQ process ID to indicate the MAC-e PDU of this HARQ process transmission be new data, the timer expiry of value minimum in the E-DCH MAC-d stream retransmission timer of each UE among the Node B at least simultaneously;
Perhaps, the MAC-e PDU that certain HARQ process of UE is uploaded as Node B decodes unsuccessfully, and value maximum overtime in the E-DCH MAC-d that each UE is corresponding among the Node B stream retransmission timer.
The flow process of Node B notice CRNC comprises as shown in Figure 4:
Step 401: when certain MAC-e PDU need to retransmit, start E-DCH MAC-d stream retransmission timer corresponding among the Node B.
The first process of transmitting of MAC-e PDU such as the description in the background technology, if the MAC-ePDU mistake that receives, the HARQ solid element of Node B is by the HARQ entity transmission NACK order of air interface to UE, and requirement retransmits this MAC-e PDU; The E-DCH MAC-d of Node B stream retransmission timer unit is that this MAC-e PDU starts an E-DCH MAC-d stream retransmission timer simultaneously, and determines the timing duration of E-DCH MAC-d stream retransmission timer according to the stream of the MAC-d under this MAC-e PDU.
When the HARQ entity of UE receives the NACK order that the HARQ entity of Node B sends, from buffering area, call corresponding HARQ process and again send this MAC-e PDU to Node B.
Step 402: the overtime situation of each E-DCH MAC-d stream retransmission timer among the monitoring Node B, when satisfying the informing load state condition of setting, by carrying the NBAP radio link parameter update Indication message of load condition indication information element, with the load condition notice CRNC of Node B.
The load condition indication information element that in NBAP radio link parameter update Indication message, increases in the present embodiment, this information element type is enumeration type, value is congested or not congested, when reaching the informing load state condition of setting, load condition indication information element value is congested, otherwise for not congested.
Detect when E-DCH MAC-d stream retransmission timer satisfies the informing load state condition of setting among the Node B, Node B is to the NBAP radio link parameter update Indication message of CRNC transmission with the load condition indication information element, and this Node B of notice CRNC is in congestion state.
Step 403: carry NBAP radio link parameter update Indication message and the control strategy of load condition indication information element according to this, the balanced Node B of CRNC load.
CRNC learns that from the NBAP radio link parameter update Indication message that carries the load condition indication information element this Node B is in congestion state, according to processing such as control strategy such as traffic load adjustment, new UE access limitations, to reach the purpose of equally loaded, reduction Node B traffic load.
In the step 402, Node B can also carry by the NBAP E-DCH traffic load Indication message of new definition load condition indication information element notice CRNC load condition, load condition indication information element type is Boolean type, and value is 1 or 0, represents respectively congested or not congested.
More than be that Node B notifies the CRNC load condition by the control plane of wireless network layer, Node B can also notify the CRNC load condition by user plane, namely in the step 402, can also notify CRNC with the load condition of Node B by the user plane control frame.Usually, user plane FP frame is used for transmitting control information between Node B and the CRNC, but does not comprise the situation of load condition in the prior art.The FP frame format that the present invention adopts is: the frame head of FP frame partly uses the normal structure in the existing protocol, specifically can be with reference to the 3GPP related protocol; Take 1 bit in the reserved field of the payload part of FP frame, be used for the load condition indication information element, remaining payload part is as reserved field, in order to the usefulness of expansion.As required, Node B sends this control frame to CRNC, and wherein load condition indication information element value is 1, otherwise load condition pointer information element value is 0, and this FP frame can transmit at any one lub transmission bearer corresponding to this user.
In addition, Node B to the condition of CRNC informing load state can also for:
The MAC-e PDU that the mixing request retransmission HARQ process of user equipment (UE) is uploaded as Node B decodes unsuccessfully, and described HARQ process is uploaded new MAC-e PDU, and value minimum overtime in each E-DCH MAC-d stream retransmission timer corresponding to UE described in the Node B; Perhaps,
The MAC-e PDU that the HARQ process of UE is uploaded as Node B decodes unsuccessfully, and value maximum overtime in each E-DCH MAC-d stream retransmission timer corresponding to UE described in the Node B.
Like this, the overtime situation of E-DCH MAC-d stream retransmission timer to each UE among the Node B adds up respectively, giving the correct time to CRNC, can also carry the E-DCH MAC-d stream retransmission timer expired times of each UE that satisfies condition, so that CRNC can understand the load condition of Node B in detail.
In the second embodiment of the invention, the E-DCH MAC-d stream retransmission timer of Node B is overtime, all notify CRNC with the load condition of Node B no longer at every turn, but congestion threshold N is set in the NBAP public-measurement, it is the overtime thresholding of E-DCH MAC-d stream retransmission timer, the congested value of statistics in the public-measurement process, namely the expired times of E-DCH MAC-d stream retransmission timer are just notified CRNC when congested value surpasses congestion threshold N.Congestion threshold N can be defined as within measuring period the E-DCH MAC-d of all UE stream retransmission timer accumulative total expired times in the residential quarter herein; Or the E-DCH MAC-d that within measuring period, adds up respectively for each UE in residential quarter stream retransmission timer expired times.
In the NBAP public-measurement process of present 3GPP agreement, increase new measurement type: congested value, within a measuring period, corresponding every increase by 1 condition setting of congested value is:
The MAC-e PDU that certain HARQ process of UE is uploaded as Node B decodes unsuccessfully, and RSN and HARQ process ID to indicate the MAC-e PDU of this HARQ process transmission be new data, the timer expiry of value minimum in the E-DCH MAC-d stream retransmission timer of each UE among the Node B at least simultaneously;
Perhaps, the MAC-e PDU that certain HARQ process of UE is uploaded as Node B decodes unsuccessfully, and value maximum overtime in the E-DCH MAC-d that each UE is corresponding among the Node B stream retransmission timer.
In NBAP public-measurement initialization procedure, CRNC arranges measurement to congested value by NBAP public-measurement initial message, and sets congestion threshold N.The flow process of Node B notice CRNC comprises as shown in Figure 5:
Whether the overtime situation of each E-DCH MAC-d stream retransmission timer among step 502, the monitoring Node B, and the congested value M of each E-DCH MAC-d stream retransmission timer of accumulative total judge M greater than N, if so, and execution in step 503; Otherwise, continue the congested value M that this E-DCH MAC-d of accumulative total flows retransmission timer.
Step 503: by carrying the NBAP public-measurement reporting message of load condition indication information element, with the load condition notice CRNC of Node B.
In the present embodiment, NBAP public-measurement reporting message has been done improvement, increased the load condition indication information element, this information element comprises the congested value of Node B, i.e. the E-DCH MAC-d of all UE of statistics stream retransmission timer accumulative total expired times in measuring period.
Step 504: carry NBAP public-measurement reporting message and the control strategy of load condition indication information element according to this, the balanced Node B of CRNC load.
In the step 503, can also adopt the NBAP public-measurement response message that has increased the load condition indication information element according to the request of NBAP public-measurement, report the load condition of Node B to CRNC.NBAP public-measurement response message can only be as the feedback generation of NBAP public-measurement request, and NBAP public-measurement reporting message then can according to the condition that arranges in the NBAP public-measurement initialization procedure, initiatively be sent to CRNC by Node B.
Above process is in NBAP public-measurement process, and the congested value of all UE that Node B is connected is added up, with the traffic load of comprehensive grasp Node B.In NBAP public-measurement process, according to user's request, measurement to congested value can also be for the single UE in the Node B residential quarter, and namely congested value is the overtime number of times of E-DCH MAC-d stream retransmission timer that each UE is corresponding among the Node B, and the condition that congested value increases is:
The MAC-e PDU that the HARQ process of UE is uploaded as Node B decodes unsuccessfully, and described HARQ process uploads new MAC-e PDU, and value minimum overtime in each E-DCH MAC-d stream retransmission timer corresponding to UE described in the Node B; Perhaps,
The MAC-e PDU that the HARQ process of UE is uploaded as Node B decodes unsuccessfully, and value maximum overtime in each E-DCH MAC-d stream retransmission timer corresponding to UE described in the Node B.
Like this, the overtime situation of E-DCH MAC-d stream retransmission timer to each UE among the Node B adds up respectively, giving the correct time to CRNC, can also carry the E-DCH MAC-d stream retransmission timer expired times of each UE that satisfies condition, so that CRNC can understand the load condition of Node B in detail.
In addition, the second embodiment of the present invention can also realize corresponding process by NBAP special measurement message, repeats no more herein.
In addition, the report cycle of base station can also be set in the measuring process of NBAP, Node B is exactly that each report cycle is when arriving to the condition of CRNC informing load state, Node B measures in response message or the NBAP measurement reporting message by NBAP and carries the load condition information element, report the load condition of Node B in this report cycle to CRNC, i.e. the expired times of each E-DCH MAC-d stream retransmission timer among the Node B.
In addition, when report cycle arrived, Node B can also report the expired times of the E-DCH MAC-d stream retransmission timer that single UE is corresponding in this report cycle, carries out load-balancing decision for CRNC.
Need to prove, above-described embodiment has provided by E-DCH MAC-d and has flowed the overtime triggering of retransmission timer Node B to several possibility situations that CRNC reports information on load, may different trigger conditions be set according to real needs in the reality.
Corresponding said method, the present invention also provides corresponding device, and Fig. 6 is the schematic diagram of the first embodiment of the device of informing load state, and this device is arranged in Node B, comprises E-DCH MAC-d stream retransmission timer unit and notification unit, wherein,
E-DCH MAC-d stream retransmission timer unit is used for when certain MAC-e PDU need to retransmit, and starts corresponding E-DCH MAC-d stream retransmission timer;
Notification unit is used for the overtime situation of each E-DCH MAC-d stream retransmission timer of monitoring, when satisfying the informing load state condition of setting, with the load condition notice CRNC of Node B.
Notification unit comprises monitoring modular and message module,
Monitoring modular is used for the overtime situation of each E-DCH MAC-d stream retransmission timer of statistics; Send the overtime situation of E-DCH MAC-d stream retransmission timer to message module according to the condition of the informing load state of setting;
Message module is used for by NBAP radio link parameter update Indication message or the NBAP E-DCH traffic load Indication message that carries the load condition indication information element that carries the load condition indication information element or carries the user plane control frame that E-DCH MAC-d flows the retransmission timer time-out information, with the load condition notice CRNC of NodeB.
Wherein, the condition of informing load state is:
The MAC-e PDU that certain HARQ process of UE is uploaded as Node B decodes unsuccessfully, and RSN and HARQ process ID to indicate the MAC-e PDU of this HARQ process transmission be new data, the timer expiry of value minimum in the E-DCH MAC-d stream retransmission timer of each UE among the Node B at least simultaneously;
Perhaps, the MAC-e PDU that certain HARQ process of UE is uploaded as Node B decodes unsuccessfully, and value maximum overtime in the E-DCH MAC-d that each UE is corresponding among the Node B stream retransmission timer.
The condition of informing load state can also for:
The MAC-e PDU that the mixing request retransmission HARQ process of user equipment (UE) is uploaded as Node B decodes unsuccessfully, and described HARQ process is uploaded new MAC-e PDU, and value minimum overtime in each E-DCH MAC-d stream retransmission timer corresponding to UE described in the Node B; Perhaps,
The MAC-e PDU that the HARQ process of UE is uploaded as Node B decodes unsuccessfully, and value maximum overtime in each E-DCH MAC-d stream retransmission timer corresponding to UE described in the Node B.
The second embodiment of the device of informing load state of the present invention comprises E-DCH MAC-d stream retransmission timer unit and notification unit as described in Figure 7, wherein,
E-DCH MAC-d stream retransmission timer unit is used for when certain MAC-e PDU need to retransmit, and starts corresponding E-DCH MAC-d stream retransmission timer;
Notification unit is that NBAP measures entity, is used for the congested value of statistics Node B; When satisfying the condition of the informing load state of setting, measure reporting message with the load condition notice CRNC of Node B by NBAP measurement response message or the NBAP that carries the load condition information element.
It can be NBAP public-measurement entity that NBAP measures entity, it also can be NBAP special measurement entity, the response message that sends to CRNC is NBAP public-measurement response message or NBAP public-measurement reporting message, perhaps NBAP special measurement response message or NBAP special measurement reporting message.
NBAP measures entity congested value and the congestion threshold of measuring Node B is set in NBAP public-measurement process or NBAP special measurement process;
The condition of described informing load state is that the congested value of Node B is during greater than congestion threshold, by the NBAP public-measurement response message that carries the load condition indication information element or the NBAP special measurement response message that carries the load condition indication information element, with the load condition notice CRNC of Node B.
The overtime number of times of E-DCH MAC-d stream retransmission timer that described congested value is each UE among the Node B, the condition that congested value increases is:
The MAC-e PDU that certain HARQ process of UE is uploaded as Node B decodes unsuccessfully, and RSN and HARQ process ID to indicate the MAC-e PDU of this HARQ process transmission be new data, the timer expiry of value minimum in the E-DCH MAC-d stream retransmission timer of each UE among the Node B at least simultaneously;
Perhaps, the MAC-e PDU that certain HARQ process of UE is uploaded as Node B decodes unsuccessfully, and value maximum overtime in the E-DCH MAC-d that each UE is corresponding among the Node B stream retransmission timer.
Congested value also can only be added up the overtime number of times of E-DCH MAC-d stream retransmission timer of the single UE that sets, corresponding congested value increases the overtime situation that condition is also only considered the E-DCH MAC-d stream retransmission timer of this UE, monitors the demand of single UE congestion situation to satisfy the user.
Perhaps, NBAP measures entity arranges Node B in the NBAP measuring process report cycle;
When the condition of described informing load state was the report cycle arrival, NBAP measured entity by carrying the load condition information element in NBAP measurement response message or the NBAP measurement reporting message, with the load condition notice CRNC of Node B.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.
Claims (14)
1. the method for an informing load state is characterized in that, the method comprises:
A, when medium access control element protocol Data Unit MAC-e PDU need to retransmit, start the special channel media access control data E-DCH MAC-d stream retransmission timer of enhancing corresponding in the base station;
The overtime situation of each E-DCH MAC-d stream retransmission timer in B, the monitoring base station is when satisfying the informing load state condition of setting, with the load condition notice control radio network controller CRNC of base station.
2. the method for informing load state according to claim 1 is characterized in that, among the step B, by carrying the base station application part NBAP radio link parameter update Indication message of load condition indication information element, with the load condition notice CRNC of base station;
Perhaps, by carrying the NBAP E-DCH traffic load Indication message of load condition indication information element, with the load condition notice CRNC of base station;
Perhaps, by carrying the user plane control frame of E-DCH MAC-d stream retransmission timer time-out information, with the load condition notice CRNC of base station.
3. the method for informing load state according to claim 1 and 2 is characterized in that, the condition of described informing load state is:
The MAC-e PDU that the mixing request retransmission HARQ process of user equipment (UE) is uploaded when the base station decodes unsuccessfully, and described HARQ process uploads new MAC-e PDU, and value minimum overtime in each E-DCH MAC-d stream retransmission timer of base station; Perhaps,
The MAC-e PDU that the HARQ process of UE is uploaded when the base station decodes unsuccessfully, and value maximum overtime in each E-DCH MAC-d stream retransmission timer in the base station.
4. the method for informing load state according to claim 1 and 2 is characterized in that, the condition of described informing load state is:
The MAC-e PDU that the mixing request retransmission HARQ process of user equipment (UE) is uploaded when the base station decodes unsuccessfully, and described HARQ process uploads new MAC-e PDU, and value minimum overtime in each E-DCH MAC-d stream retransmission timer corresponding to UE described in the base station; Perhaps,
The MAC-e PDU that the HARQ process of UE is uploaded when the base station decodes unsuccessfully, and value maximum overtime in each E-DCH MAC-d stream retransmission timer corresponding to UE described in the base station.
5. the method for informing load state according to claim 1 is characterized in that, the method also comprises congestion threshold is set, also be included in the steps A base station is set in the NBAP measuring process congested value for measuring type;
The overtime situation that comprises each E-DCH MAC-d stream retransmission timer in the monitoring base station among the step B, and the congested value that further adds up each E-DCH MAC-d stream retransmission timer, wherein, the congested value of accumulative total comprises the overtime number of times of E-DCH MAC-d stream retransmission timer of all UE in the base station, perhaps, the overtime number of times of E-DCH MAC-d stream retransmission timer that each UE is corresponding in the base station, the condition of described informing load state is that the congested value of base station is greater than congestion threshold, when satisfying the condition of described informing load state, measure response message or NBAP measurement reporting message by the NBAP that carries the load condition indication information element, with the load condition notice CRNC of base station.
6. the method for informing load state according to claim 5 is characterized in that, the overtime number of times of E-DCH MAC-d stream retransmission timer that described congested value is all UE in the base station, and the condition that congested value increases is:
The MAC-e PDU that the HARQ process of UE is uploaded when the base station decodes unsuccessfully, and described HARQ
Process is uploaded new MAC-e PDU, and value minimum overtime in each E-DCH MAC-d of base station stream retransmission timer; Perhaps,
The MAC-e PDU that the HARQ process of UE is uploaded when the base station decodes unsuccessfully, and value maximum overtime in each E-DCH MAC-d of base station stream retransmission timer.
7. the method for informing load state according to claim 5 is characterized in that, described congested value is the overtime number of times of E-DCH MAC-d stream retransmission timer that each UE is corresponding in the base station, and the condition that congested value increases is:
The MAC-e PDU that the HARQ process of UE is uploaded when the base station decodes unsuccessfully, and described HARQ
Process is uploaded new MAC-e PDU, and value minimum overtime in each E-DCH MAC-d stream retransmission timer corresponding to UE described in the base station; Perhaps,
The MAC-e PDU that the HARQ process of UE is uploaded when the base station decodes unsuccessfully, and value maximum overtime in each E-DCH MAC-d stream retransmission timer corresponding to UE described in the base station.
8. the method for informing load state according to claim 1 is characterized in that, the method also comprises,
Also be included in the report cycle that the base station is set in the NBAP measuring process in the steps A;
When the condition of informing load state described in the step B was the report cycle arrival, the base station was measured in response message or the NBAP measurement reporting message by NBAP and is carried the load condition information element, with the load condition notice CRNC of base station.
9. according to claim 5 or the method for 8 described informing load states, it is characterized in that, described NBAP measuring process is NBAP public-measurement process or NBAP special measurement process.
10. the device of an informing load state is characterized in that, this device is arranged in the base station, comprises
E-DCH MAC-d stream retransmission timer unit and notification unit, wherein,
E-DCH MAC-d stream retransmission timer unit is used for when MAC-e PDU need to retransmit, and starts corresponding E-DCH MAC-d stream retransmission timer;
Notification unit is used for the overtime situation of each E-DCH MAC-d stream retransmission timer of monitoring, when satisfying the informing load state condition of setting, with the load condition notice CRNC of base station.
11. the device of informing load state according to claim 10 is characterized in that, described notification unit comprises monitoring modular and message module,
Monitoring modular is used for the overtime situation of each E-DCH MAC-d stream retransmission timer of statistics; Send the overtime situation of E-DCH MAC-d stream retransmission timer to message module according to the condition of the informing load state of setting;
Message module is used for by NBAP radio link parameter update Indication message or the NBAP E-DCH traffic load Indication message that carries the load condition indication information element that carries the load condition indication information element or carries the user plane control frame that E-DCH MAC-d flows the retransmission timer time-out information, with the load condition notice CRNC of base station.
12. the device of informing load state according to claim 10, it is characterized in that, described notification unit is that NBAP measures entity, the congested value that is used for accounting base-station, wherein, described congested value comprises the overtime number of times of E-DCH MAC-d stream retransmission timer of all UE in the base station that obtains by the overtime situation statistics of monitoring each E-DCH MAC-d stream retransmission timer, perhaps, and the overtime number of times of E-DCH MAC-d stream retransmission timer that each UE is corresponding in the base station; When satisfying the condition of the informing load state of setting, measure reporting message with the load condition notice CRNC of base station by NBAP measurement response message or the NBAP that carries the load condition information element.
13. the device of informing load state according to claim 12 is characterized in that, the condition of described informing load state is: the report cycle of setting arrives, and perhaps, the congested value of base station is greater than setting thresholding.
14. according to claim 12 or the device of 13 described informing load states, it is characterized in that, it is NBAP public-measurement entity or NBAP special measurement entity that described NBAP measures entity.
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| CN102333343A (en) * | 2011-11-02 | 2012-01-25 | 电信科学技术研究院 | Congestion information notification method and equipment |
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| CN106209665A (en) * | 2015-04-30 | 2016-12-07 | 中兴通讯股份有限公司 | A kind of realize the method for load sharing, interface message processor (IMP), service processor and system |
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| CN1859073A (en) * | 2005-08-29 | 2006-11-08 | 华为技术有限公司 | Dow data repeating method in radio communication system |
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| CN1859791A (en) * | 2006-03-30 | 2006-11-08 | 华为技术有限公司 | Method and system for realizing switching in radio communication network and its base station |
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