CN102740374A - Access control method and system thereof - Google Patents
Access control method and system thereof Download PDFInfo
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- CN102740374A CN102740374A CN2011100822680A CN201110082268A CN102740374A CN 102740374 A CN102740374 A CN 102740374A CN 2011100822680 A CN2011100822680 A CN 2011100822680A CN 201110082268 A CN201110082268 A CN 201110082268A CN 102740374 A CN102740374 A CN 102740374A
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Abstract
The invention provides an access control method and a system thereof. The method comprises that: a terminal acquires access time delay information from a network side; the terminal adjusts an access control limit parameter corresponding to the terminal itself according to the acquired access time delay information; the terminal uses the adjusted access control limit parameter to carry out access control. By using the method and the system of the invention, rapid access control can be performed on random access preamble first transmission.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of connection control method and system.
Background technology
Person to person (the Human to Human that communicates by letter; Abbreviate H2H as) be meant that the people is through communicating operation of equipment; The existing wireless communications technology is based on that the Communication Development of H2H gets up, and the sensu lato definition of machine and machine communication (Machine to Machine abbreviates M2M as) is the application and the service of core, networking with the machine terminal intelligent interaction; It is based on the intelligence machine terminal; With multiple communication mode is the access means, is the informatization resolve scheme that the client provides, and is used to satisfy the information system requirement of client to aspects such as monitoring, command scheduling, data acquisition and measurements.
The development of wireless technology is the key factor of M2M market development; It has broken through the space-time restriction and the region obstacle of traditional communication mode; Make the enterprise and the public break away from the cable constraint, let the client more effectively control cost, reduce mounting cost and easy to use.In addition; Growing demand is promoting M2M and is constantly advancing; Constantly increase with information processing capability and the network bandwidth and conflictingly to be, the means that information is obtained lag far behind, and M2M has well satisfied this demand of people; Can monitor external environment condition in real time through this technology people, realize on a large scale, the information gathering of automation.Therefore; M2M can be applied to fields such as sector application, domestic. applications, individual's application; In the use of industry application for example: traffic monitoring, warning system, rescue at sea, automatic vending machine, driving paying etc.; In the use of domestic application domain for example: automatic data logging, temperature control etc., in the use of individual application for example: life detection, far-end diagnosis etc.
The communication object of M2M is machine or Human-to-Machine; Data communication between one or more machines is defined as Machine Type communication (Machine Type Communication; Abbreviate MTC as), less in this case human-computer interaction, the machine of participation MTC of needing; Be defined as MTC equipment (MTC device abbreviates MD as).MTC equipment is MTC user's terminal, can pass through public land mobile network (Public Land Mobile Network abbreviates PLMN as) network and MTC equipment, MTC server and communicate.
After introducing M2M and using, can carry out some optimizations to existing system, satisfying the M2M application demand, and the common H2H equipment in the existing system not exerted an influence according to its characteristics.Some distinguishing features that M2M uses comprise: the MTC number of devices is huge, quantity ultra existing H2H equipment far away; Transfer of data is regular, and each data quantity transmitted is little; The mobility of MTC equipment is lower, and MTC equipment greatly is not move.
During MTC equipment access network; Need to initiate to insert at random; Fig. 1 be according in the LTE system of correlation technique based on the flow chart of random access procedure of competition, as shown in Figure 1, at Long Term Evolution (Long Term Evolution; Abbreviate LTE as) in, comprise mainly that based on the access process of competing at random following step S102 is to step S108.
Step S102: subscriber equipment (User Equipment abbreviates UE as) is selected a prefix code (Preamble) at random, goes up at Physical Random Access Channel (Physical Random Access Channel abbreviates PRACH as) and sends.
Step S104: base station (eNB) is after having detected the transmission of Preamble sign indicating number; Descending transmission accidental access response (Random Access Response; Abbreviate RAR as); Generally comprise following information in the said accidental access response: the numbering of the Preamble sign indicating number of being received, the Preamble sign indicating number time corresponding adjustment amount of being received, distribute for the ascending resource position indication information of this terminal distribution, interim Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (Temporary Cell Radio Network Temporary Identifier abbreviates Temporary C-RNTI as).
The terminal is receiving random access response (RAR) in a time window (RA Response window); This time window agreement has clear and definite regulation; For the 3rd sub-frame of having sent from the terminal behind the prefix code begins, the length of time window (ra-ResponseWindowSize) is disposed by system message.After this time window was received accidental access response, terminal parses was obtained the ascending resource position indication information of distribution, interim Cell Radio Network Temporary Identifier/Identity, Cell-RNTI etc.If in this time window, do not receive RAR, then the terminal thinks that this time Access Preamble detects failure at random, and preparing to initiate for the second time at random, Access Preamble sends.
Fig. 2 is the structural representation according to MAC PDU in the LTE system of correlation technique; As shown in Figure 2; Carry medium access control (the MediaAccess Control of RAR; Abbreviate MAC as) RAR protocol Data Unit (Protocol Data Unit abbreviates PDU as) by 1 MAC head (header) and 0 or a plurality of MAC RAR and optional (optional) fill content (padding) and constitute.Wherein MAC header is by 1 rollback (backoff) son head (subheader), 0 or a plurality of RAR subheader formation.Wherein comprised the backoff value in the backoff head, each RAR head then correspondence each MAC RAR.The effect of backoff value is to let the initiation transmission of Access Preamble at random for the second time at once of UE of access failure at random; But after wait for a period of time (time span is from an equally distributed random value 0 to the backoff value); Initiate the transmission of Access Preamble at random for the second time again; Can reduce the access collision probability like this, it is congested to reduce access.
Wherein backoff head is the sub-head of an optional transmission, only exists at network usually and inserts under the congested situation, and network side can send the sub-head of backoff.
Fig. 3 is the sketch map according to Backoff head among the MAC RARPDU in the LTE system of correlation technique.
" E ": if be " 1 ", expression should also have other sub-heads at the back by the child head; If be " 0 ", representative should the child head be MACRAR or padding at the back;
" T ": if be " 1 ", expression book head is the sub-head of backoff; Otherwise expression book head is RAR head (do not have " BI " territory in the RAR head, but " RAPID " territory is arranged, wherein place the corresponding lead code sequence number of this RAR head);
" R ": the reservation bit position, be set to 0, the UE of early version can not read these reservation bit positions;
" BI ": totally 4 bits, place the sequence number of backoff value, the corresponding relation between the backoff value of sequence number and reality is as shown in the table.
Mapping table between the backoff value of sequence number in table 1 correlation technique and reality
| Sequence number (Index) | Backoff value (ms of unit) |
| 0 | 0 |
| 1 | 10 |
| 2 | 20 |
| 3 | 30 |
| 4 | 40 |
| 5 | 60 |
| 6 | 80 |
| 7 | 120 |
| 8 | 160 |
| 9 | 240 |
| 10 | 320 |
| 11 | 480 |
| 12 | 960 |
| 13 | Reserved |
| 14 | Reserved |
| 15 | Reserved |
Number of terminals quantitative change in network is many; Great amount of terminals is initiated to insert at random when asking to be linked into network simultaneously, and not enough situation possibly take place the access lead sign indicating number resource in the network, causes a large amount of MTC terminal that access interference can take place; Therefore; When eNB detects network load and becomes heavy, can on time-domain, break up the behavior of access at random at terminal through adjustment backoff value, reduction access interference probability.
Step S106:UE according to its indication, sends upstream message on the ascending resource that distributes after receiving accidental access response.This upstream message is called Message 3 (Msg3) again, wherein should comprise at least: unique identification at this terminal (TMSI) or random identification (Random ID), and set up reason (Establishment Cause).
Step S108: the base station receives the upstream message of UE, and returns competition solution message (Contention Resolution is called Msg4 again) to inserting successful UE.If UE received this message before conflict solves timer expiry, and confirm that through unpacking this Msg4 is the Msg4 of UE expectation, then confirm this random access procedure success; Otherwise confirm to get nowhere, UE initiates to insert at random again.UE initiates again to insert at random and need restart from step S102.
In addition, triggering the incident that inserts process at random in the LTE system comprises: (1) idle (idle) state initially inserts; (2) RRC connection reconstruction process; (3) switch (HO, Handover); (4) the connection status downlink data arrives; And (5) connection status upstream data arrives.
The number of times that sends prefix code when subscriber equipment surpasses maximum transmission times (preambleTransMax), and when the number of times that promptly sends prefix code equaled preambleTransMax+1, this is access failure at random.Because the access at random of LTE system is implemented at the medium Access Layer, behind access failure at random, the MAC layer need be to the notice failure of the upper strata of subscriber equipment.Initiate professional demand if the upper strata of subscriber equipment still has, then can trigger the MAC layer and initiate once more to insert at random.
But, after introducing MTC equipment, because nobody's participation; When MTC equipment has data to send (when needing to initiate business), the initiation that MTC equipment will continue inserts until data at random and sends successfully, and because the MTC amount of equipment is huge; Numerous MTC equipment repeatedly sends data will consume particularly random access resource of a large amount of Radio Resources; And,, will cause and insert overload at random if it is very big to initiate the MTC number of devices of transfer of data simultaneously; The access failure at random that this will cause all subscriber equipmenies (H2H equipment and MTC equipment) to be initiated; And subscriber equipment also can initiate to insert at random behind the access failure at this at random once more, thereby make to insert at random is in overload always, and network can not recover normal condition.
There is shortcoming in the existing congested settlement mechanism of access-in resource that is directed against in the existing system, can not tackle a large amount of MTC equipment short time and concentrate the initiation scene of access at random.For example; Access control restriction (Access Control Barring in the existing mechanism; Abbreviating ACB as) mechanism is to send ACB access control parameter by access network elements through broadcast to come the access ratio of control terminal and require the terminal to postpone to insert; Its major defect is exactly the restriction (update times hourly is limited) that the renewal speed of ACB Control Parameter receives the system broadcast message renewal speed; Control command reaction and renewal speed are slow, can't tackle the access congested (inserting congested variation from low to high possibly take place in the several seconds) of short time generation.Wherein, ACB access control parameter comprises: access control restriction factor AC barring factor (0～1 decimal); Access control binding hours AC barring time (4～512 seconds)
Access control mechanism has been stipulated 16 access grades (Access Class abbreviates AC as) altogether, and wherein, AC 0～9 is corresponding to ordinary call, and AC 10 is corresponding to urgent call, and AC 11～15 is corresponding to other special calling.For AC 0～9, network side is corresponding AC barring factor for each AC has set, and for AC 10～15, network side identifies for the access restriction that each AC has set a 1bit, and above-mentioned access control parameter is broadcast to the terminal through system message.When inserting corresponding to the terminal of a certain AC; If the AC at this terminal belongs to 0～9; Then the terminal can produce the uniform random number between 0～1; If this random number is less than the pairing AC barring of AC factor, then this terminal can be inserted, otherwise; This terminal postpone a period of time (calculate according to AC barring time time of delay: time of delay=(0.7+0.6*rand) * AC_barring_time, wherein rand is less than a uniform random number of 1 more than or equal to 0) after reattempt access; If the AC at this terminal belongs to 11～15, then if the AC corresponding identification is 0, then this terminal can be inserted, otherwise can not insert; If the AC at this terminal is 10, then if the AC corresponding identification is 0, then this terminal can be inserted, otherwise can not insert.
Another kind of Backoff (rollback) mechanism is indicate and (carry with of the backoff among the MAC RAR PDU through in the feedback message of giving the terminal of having sent Access Preamble (preamble), carrying a Backoff time by access network elements; See the explanation of aforesaid backoff head; This Backoff time indicates and is included in accidental access response Medium Access Control (MAC) Protocol Data Unit (Protocol Data Unit; Be called for short PDU) in) resend preamble again after making those prefixs detect end delay a period of time of failure, thus the preamble collision probability reduced.Though Backoff mechanism reaction speed is very fast, because its preamble that can only postpone to retransmit sends, send and can not control the first preamble that passes, therefore concentrate the solution effect of initiating to insert at random still undesirable for a large amount of MTC equipment short time.
Also propose to introduce the method for ACB of Backoff or the classification of classification in the correlation technique, so-called classification is exactly that terminal (for example the terminal of the terminal of MTC type or low priority etc.) to newtype is provided with independently Backoff indication or ACB parameter.But still can't solving the slow and Backoff mechanism of ACB mechanism reaction speed, this method can only control the shortcoming that preamble retransmits.
Summary of the invention
To great amount of terminals initiate simultaneously that access at random can cause access-in resource overload, the problem that can not recover smoothly and propose the present invention, for this reason, main purpose of the present invention is to provide a kind of connection control method and system, to address the above problem.
To achieve these goals, according to an aspect of the present invention, a kind of connection control method is provided.
Connection control method according to the present invention comprises: the terminal gets access to the access delay temporal information from network side; Self corresponding access control limiting parameter is adjusted according to the access delay temporal information of obtaining in the terminal; The terminal uses adjusted access control limiting parameter to carry out access control.
Further, the access delay temporal information that gets access to from network side of terminal comprises: the terminal gets access to the access delay temporal information from network side through MAC PDU.
Further, the terminal comprises through the access delay temporal information that MAC PDU gets access to from network side: the terminal gets access to the access delay temporal information from network side through MAC RAR PDU.
Further, the terminal comprises through the access delay temporal information that MAC RAR PDU gets access to from network side: the Backoff time that the terminal will get access to through MAC RARPDU is as the access delay temporal information.
Further, if the access delay temporal information is classified according to terminal type, then the terminal only obtains the access delay temporal information corresponding with self type.
Further, the terminal is according to the access delay temporal information obtained, adjusts self corresponding access control limiting parameter and comprises: the terminal with the access delay temporal information of obtaining as the access delay value; The access delay value is used at the terminal, adjusts self corresponding access control limiting parameter.
Further, if the terminal obtains access delay temporal information failure, then said method also comprises one of following: it is zero that the terminal is provided with the access delay value; The access delay temporal information is continued to obtain in the terminal, and reaches under the situation of pre-determined number at the number of times that obtains the failure of access delay temporal information continuously, and it is zero that the access delay value is set.
Further, the terminal is according to the access delay temporal information obtained, adjusts self corresponding access control limiting parameter and comprises: the terminal repeatedly obtained the access delay temporal information before sending first at random Access Preamble; The minimum value of the delay time that access delay temporal information that the terminal will repeatedly obtain is corresponding or maximum or mean value is as the access delay value, and perhaps the corresponding delay time of the access delay temporal information that will obtain for the last time of terminal is as the access delay value; The access delay value is used at the terminal, adjusts self corresponding access control limiting parameter.
Further; The terminal is before sending first at random Access Preamble; Repeatedly obtaining the access delay temporal information comprises one of following: the terminal continues reading times according to predefined access delay temporal information; Repeatedly obtain the access delay temporal information, wherein the lasting reading times of access delay temporal information is used for the number of times that indicating terminal continues to read the access delay temporal information; The terminal continues time for reading according to predefined access delay temporal information, repeatedly obtains the access delay temporal information, and wherein the lasting time for reading of access delay temporal information is used for the time span that indicating terminal continues to read the access delay temporal information.
Further; The terminal is through comprising one of following mode, sets that the access delay temporal information continues reading times and/or the access delay temporal information continues time for reading: terminal and the network side access delay temporal information of making an appointment continues reading times and/or the lasting time for reading of access delay temporal information; The terminal receives the broadcast from network side, and wherein broadcast is used to notify the access delay temporal information to continue reading times and/or the lasting time for reading of access delay temporal information; The terminal receives the dedicated signaling from network side, and wherein dedicated signaling is used to notify the access delay temporal information to continue reading times and/or the lasting time for reading of access delay temporal information; The terminal disposes the access delay temporal information voluntarily and continues reading times and/or the lasting time for reading of access delay temporal information.
Further, if the terminal repeatedly obtains and once obtains access delay temporal information failure in the access delay temporal information, then said method also comprises one of following: it is zero that the terminal is provided with the access delay value that this time obtain; The terminal continues reading times with the access delay temporal information and increases by one, and increases continuously under the situation that reaches pre-determined number in the lasting reading times of access delay temporal information, and it is zero that the access delay value is set.
Further, the terminal is according to the access delay temporal information obtained, adjusts self corresponding access control limiting parameter and comprises: the terminal trigger insert process at random before, repeatedly obtain the access delay temporal information; The minimum value of the delay time that access delay temporal information that the terminal will repeatedly obtain is corresponding or maximum or mean value is as the access delay value, and perhaps the corresponding delay time of the access delay temporal information that will obtain for the last time of terminal is as the access delay value; The access delay value is used at the terminal, adjusts self corresponding access control limiting parameter.
Further, the terminal trigger insert process at random before, repeatedly obtain the access delay temporal information and comprise one of following: the terminal continues to obtain the access delay temporal information; The terminal repeatedly obtains the access delay temporal information according to the predefined cycle.
Further, if the terminal repeatedly obtains and once obtains access delay temporal information failure in the access delay temporal information, then said method also comprises one of following: it is zero that the terminal is provided with the access delay value that this time obtain; The access delay temporal information that this time obtained is not added up at the terminal.
Further, all fail if the terminal repeatedly obtains the access delay temporal information, then the access delay value is set is zero at the terminal.
Further; The access delay value is used at the terminal; Adjusting self corresponding access control limiting parameter comprises: the access delay value is used at the terminal, and mapping obtains AC barring factor value and/or AC barring time value, and with it as adjusted access control limiting parameter; The access delay value is used at the terminal; Mapping obtains the AC barring factor adjustment factor and/or the AC barring time adjustment factor; And use the AC barring factor adjustment factor and/or the AC barring time adjustment factor, adjust self corresponding access control limiting parameter.
Further; The AC barring factor adjustment factor and/or the AC barring time adjustment factor are used in the terminal, adjust self corresponding access control limiting parameter and comprise one of following: the terminal with the product of the AC barring factor value at the AC barring factor adjustment factor and/or the AC barring time adjustment factor and terminal self and/or AC barring time value as adjusted access control limiting parameter; The terminal with the AC barring factor value at the AC barring factor adjustment factor and/or the AC barring time adjustment factor and terminal self and/or AC barring time value and as adjusted access control limiting parameter.
To achieve these goals, according to another aspect of the present invention, a kind of access control system is provided.
Access control system according to the present invention comprises terminal and network side, and wherein the terminal comprises: acquisition module is used to obtain the access delay temporal information from network side; Adjusting module is used for adjusting self corresponding access control limiting parameter according to the access delay temporal information of obtaining; The access control module is used to use adjusted access control limiting parameter to carry out access control.
The present invention is initiating access at random before according to indicating the time of delay among the MAC RAR PDU through the terminal; Obtain the access congestion situation of network side; Thereby the ACB access control parameter of obtaining is carried out corresponding adjustment, to realize to inserting the first quick access control that passes of preamble at random.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 be according in the LTE system of correlation technique based on the flow chart of random access procedure of competition;
Fig. 2 is the structural representation according to MAC PDU in the LTE system of correlation technique;
Fig. 3 is the sketch map according to Backoff head among the MAC RARPDU in the LTE system of correlation technique;
Fig. 4 is the flow chart according to the connection control method of the embodiment of the invention;
Fig. 5 is the flow chart according to the connection control method of the preferred embodiment of the present invention two;
Fig. 6 is the structured flowchart according to the access control system of the embodiment of the invention.
Embodiment
Need to prove that under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the present invention.
The invention provides a kind of connection control method.Fig. 4 is the flow chart according to the random access control method of the embodiment of the invention, and is as shown in Figure 4, comprises that following step S402 is to step S406.
Step S402, the terminal gets access to the access delay temporal information from network side.
Step S404, self corresponding access control limiting parameter is adjusted according to the access delay temporal information of obtaining in the terminal.
Step S406, the terminal uses adjusted access control limiting parameter to carry out access control.
In the correlation technique, great amount of terminals is initiated access at random simultaneously and can be caused the access-in resource overload, can not recover smoothly.In the embodiment of the invention; Initiating access at random before according to indicating the time of delay among the MAC RAR PDU through the terminal; Obtain the access congestion situation of network side; Thereby the ACB access control parameter of obtaining is carried out corresponding adjustment, to realize to inserting the first quick access control that passes of preamble at random.
Preferably, the access delay temporal information that gets access to from network side of terminal comprises: the terminal gets access to the access delay temporal information from network side through MAC PDU.
Preferably, the terminal comprises through the access delay temporal information that MAC PDU gets access to from network side: the terminal gets access to the access delay temporal information from network side through MACRAR PDU.
Preferably, the terminal comprises through the access delay temporal information that MAC RAR PDU gets access to from network side: the Backoff time that the terminal will get access to through MAC RAR PDU is as the access delay temporal information.
Preferably, if the access delay temporal information is classified according to terminal type, then the terminal only obtains the access delay temporal information corresponding with self type.
Preferably, the terminal is according to the access delay temporal information obtained, adjusts self corresponding access control limiting parameter and comprises: the terminal with the access delay temporal information of obtaining as the access delay value; The access delay value is used at the terminal, adjusts self corresponding access control limiting parameter.
Preferably, if the terminal obtains access delay temporal information failure, then said method also comprises one of following: it is zero that the terminal is provided with the access delay value; The access delay temporal information is continued to obtain in the terminal, and reaches under the situation of pre-determined number at the number of times that obtains the failure of access delay temporal information continuously, and it is zero that the access delay value is set.
Preferably, the terminal is according to the access delay temporal information obtained, adjusts self corresponding access control limiting parameter and comprises: the terminal repeatedly obtained the access delay temporal information before sending first at random Access Preamble; The minimum value of the delay time that access delay temporal information that the terminal will repeatedly obtain is corresponding or maximum or mean value is as the access delay value, and perhaps the corresponding delay time of the access delay temporal information that will obtain for the last time of terminal is as the access delay value; The access delay value is used at the terminal, adjusts self corresponding access control limiting parameter.
Preferably; The terminal is before sending first at random Access Preamble; Repeatedly obtaining the access delay temporal information comprises one of following: the terminal continues reading times according to predefined access delay temporal information; Repeatedly obtain the access delay temporal information, wherein the lasting reading times of access delay temporal information is used for the number of times that indicating terminal continues to read the access delay temporal information; The terminal continues time for reading according to predefined access delay temporal information, repeatedly obtains the access delay temporal information, and wherein the lasting time for reading of access delay temporal information is used for the time span that indicating terminal continues to read the access delay temporal information.
Preferably; The terminal is through comprising one of following mode, sets that the access delay temporal information continues reading times and/or the access delay temporal information continues time for reading: terminal and the network side access delay temporal information of making an appointment continues reading times and/or the lasting time for reading of access delay temporal information; The terminal receives the broadcast from network side, and wherein broadcast is used to notify the access delay temporal information to continue reading times and/or the lasting time for reading of access delay temporal information; The terminal receives the dedicated signaling from network side, and wherein dedicated signaling is used to notify the access delay temporal information to continue reading times and/or the lasting time for reading of access delay temporal information; The terminal disposes the access delay temporal information voluntarily and continues reading times and/or the lasting time for reading of access delay temporal information.
Preferably, if the terminal repeatedly obtains and once obtains access delay temporal information failure in the access delay temporal information, then said method also comprises one of following: it is zero that the terminal is provided with the access delay value that this time obtain; The terminal continues reading times with the access delay temporal information and increases by one, and increases continuously under the situation that reaches pre-determined number in the lasting reading times of access delay temporal information, and it is zero that the access delay value is set.
Preferably, the terminal is according to the access delay temporal information obtained, adjusts self corresponding access control limiting parameter and comprises: the terminal trigger insert process at random before, repeatedly obtain the access delay temporal information; The minimum value of the delay time that access delay temporal information that the terminal will repeatedly obtain is corresponding or maximum or mean value is as the access delay value, and perhaps the corresponding delay time of the access delay temporal information that will obtain for the last time of terminal is as the access delay value; The access delay value is used at the terminal, adjusts self corresponding access control limiting parameter.
Preferably, the terminal trigger insert process at random before, repeatedly obtain the access delay temporal information and comprise one of following: the terminal continues to obtain the access delay temporal information; The terminal repeatedly obtains the access delay temporal information according to the predefined cycle.
Preferably, if the terminal repeatedly obtains and once obtains access delay temporal information failure in the access delay temporal information, then said method also comprises one of following: it is zero that the terminal is provided with the access delay value that this time obtain; The access delay temporal information that this time obtained is not added up at the terminal.
Preferably, all fail if the terminal repeatedly obtains the access delay temporal information, then the access delay value is set is zero at the terminal.
Preferably; The access delay value is used at the terminal; Adjusting self corresponding access control limiting parameter comprises: the access delay value is used at the terminal, and mapping obtains AC barring factor value and/or AC barring time value, and with it as adjusted access control limiting parameter; The access delay value is used at the terminal; Mapping obtains the AC barring factor adjustment factor and/or the AC barring time adjustment factor; And use the AC barring factor adjustment factor and/or the AC barring time adjustment factor, adjust self corresponding access control limiting parameter.
Preferably; The AC barring factor adjustment factor and/or the AC barring time adjustment factor are used in the terminal, adjust self corresponding access control limiting parameter and comprise one of following: the terminal with the product of the AC barring factor value at the AC barring factor adjustment factor and/or the AC barring time adjustment factor and terminal self and/or AC barring time value as adjusted access control limiting parameter; The terminal with the AC barring factor value at the AC barring factor adjustment factor and/or the AC barring time adjustment factor and terminal self and/or AC barring time value and as adjusted access control limiting parameter.
To combine instance that the implementation procedure of the embodiment of the invention is described in detail below.
Preferred embodiment one
This preferred embodiment one has been described the enforcement example of access control technology at random in the LTE system fast of the present invention.
If the embodiment scene is the LTE system, a large amount of MTC (Machine-Type Communication) equipment and H2H terminal are arranged in the LTE sub-district.These MTC equipment comprise (for example intellectual water meter, intelligent electric meter) and (for example health monitoring appearance, the mobile POS machine etc.) of not tolerable time-delay type of the type of tolerable time-delay, also comprise high access priority type (for example fire alarm) and low access priority type (for example intellectual water meter, intelligent electric meter).
At first, the terminal obtained access delay temporal information through MAC PDU from network side according to setting means before initiating access at random.
Said setting means comprises one of following manner:
Said terminal only after having triggered access process at random, obtains once said access delay temporal information from network side again;
The terminal and before sending first at random Access Preamble, obtain repeatedly access delay temporal information from network side, or lasting a period of time is obtained the access delay temporal information only after having triggered access process at random; Wherein said number of times or the duration of obtaining the access delay temporal information from network side can also can be arranged by network side and terminal by network side through broadcast or dedicated signaling notice terminal in advance, also can be disposed voluntarily by the terminal;
Said terminal (promptly produced and triggers before the incident that inserts at random) before triggering inserts process at random, promptly obtained said access delay temporal information from network side, and method comprises:
The terminal continues obtains the access delay temporal information;
The terminal obtains the access delay temporal information according to certain cycle, and the said cycle can be notified the terminal by network side, also can be arranged in advance by network side and terminal, also can be set up on their own by the terminal;
Above-mentioned setting means can be informed terminal (for example which kind of setting means is new IE or the new message field of increase represent to adopt in one of existing SIB) through broadcast by network side, also can be arranged in advance by network side and terminal;
Further, the terminal can obtain the access delay temporal information from network side through MAC RAR PDU;
Further, the terminal can obtain the Backoff time as the access delay temporal information through MAC RAR PDU, also promptly, can obtain the Backoff time through the BI head that reads among the MAC RAR PDU.
Here; For the BI head that reads among the MAC RAR PDU; Need to prove that existing LTE system is when sending MACRAR PDU, its corresponding PDCCH (physical downlink control channel) dispatch need be used one and the pairing Physical Random Access Channel of MAC RARPDU (Physical Random Access Channel; Abbreviation PRACH) sign indicating number that is associated carries out mask; This sign indicating number is referred to as RA-RNTI (Random Access-Radio Network Temporary Identifier, random access radio network temporary mark), and the generation method of this yard is: RA-RNTI=1+t_id+10*f_id.Wherein, t_id is the sequence number (0≤t_id＜10) of first subframe of the shared time and frequency zone resource of said PRACH, and f_id is the frequency domain position sequence number (0≤f_id＜6) of the shared time and frequency zone resource of said PRACH.That is to say; No matter whether the terminal has used PRACH to send preamble; The terminal can calculate corresponding RA-RNTI according to the time-frequency domain configuration (these can obtain) of PRACH from broadcast, and understands PDCCH in view of the above, obtains MAC RAR PDU.
If the access delay temporal information that network side sends is classified, then the terminal receives only the access delay temporal information corresponding with own type.
So-called classification is meant that network side is the dissimilar different access delay temporal informations of sending respectively.The mode of classification is for example: by terminal equipment type classification, or the business initiated by terminal or terminal to the tolerance classification of time, or the priority classification of the business initiated by terminal or terminal, or whether be the roaming terminal classification, or identified the group character at terminal by the terminal.
The terminal confirms how own corresponding ACB parameter is adjusted, method comprises according to the access delay temporal information of obtaining:
At first, the terminal calculates access delay value T according to the access delay temporal information of obtaining, then:
The terminal is according to the size of T; Shine upon the corresponding AC barring factor adjustment factor and/or the AC barring time adjustment factor, and with the product of the said adjustment factor and terminal original AC barring factor and/or AC barring time new AC barring factor value and/or the AC barring time value as the terminal;
For example, can shine upon according to the mode of following table:
The mapping table of table 2 access delay value, the AC barring factor adjustment factor and the AC barring time adjustment factor
| Access delay value T | AC barring factor adjusts the factor | AC barring time adjusts the factor |
| 0＜＝T＜T1 | AC barring factor adjusts |
AC barring time adjusts |
| T1＜＝T＜T2 | AC barring factor adjusts factor 2 | AC barring time adjusts factor 2 |
| T2＜＝T＜T3 | AC barring factor adjusts the factor 3 | AC barring time integral divisor 3 |
| T3＜＝T＜T4 | AC barring factor adjusts the factor 4 | AC barring time adjusts the factor 4 |
| ... | ... | ... |
Last table can be notified the terminal by network side, also can be arranged in advance by network side and terminal.
The terminal uses the mode of the own original ACB parameter of adjustment factor adjustment of shining upon to comprise:
Only adjust AC barring factor and AC barring time one of them, perhaps the two is all adjusted.
Perhaps corresponding AC barring factor value and/or AC barring time value are shone upon according to the size of T in the terminal, and with its new AC barring factor value and/or AC barring time value as the terminal correspondence;
For example, can shine upon according to the mode of following table:
The mapping table of table 3 access delay value, new AC barring factor and new AC barring time
| Access delay value T | New AC barring factor | New AC barring time |
| 0＜＝T＜T1 | New |
New |
| T1＜＝T＜T2 | New AC barring factor 2 | New AC barring time 2 |
| T2＜＝T＜T3 | New AC barring factor 3 | New AC barring time 3 |
| T3＜＝T＜T4 | New AC barring factor 4 | New AC barring time 4 |
| ... | ... | ... |
Last table can be notified the terminal by network side, also can be arranged in advance by network side and terminal.
The terminal adopts the mode of shining upon the new ACB parameter that to comprise:
Only adopt new AC barring factor and new AC barring time one of them, perhaps the two all adopts new.
After the own original ACB parameter of terminal adjustment, carry out access control according to new parameter.
Preferred embodiment two
Fig. 5 is the flow chart according to the connection control method of the preferred embodiment of the present invention two, and is as shown in Figure 5, comprises that following step S501 is to step S507.
Network side and terminal in advance the agreement mode of obtaining the access delay temporal information are: the terminal and before sending first at random Access Preamble, obtains repeatedly (establishing number of times is K) access delay temporal information from network side only after having triggered access process at random.
Step S501, eNB (evolved NodeB, base station) inform the following information in terminal through broadcast.
Number of times K value is supposed K=5 time;
Physical Random Access Channel (Physical Random Access Channel; Be called for short PRACH) be configured to PRACH configuration 0 (first subframe of each radio frames (10ms length) (each subframe 1ms length) has the PRACH resource to use), Preamble adopts form 0 (only taking 1 sub-frame) (content of above-mentioned PRACH configuration can with reference to 3Gpp agreement TS36.211)
The ACB parameter at low priority terminal comprises: AC barring factor=0.9; AC barring time=10ms;
Step S502, certain Terminal Type (suppose it is intelligent electric meter, belong to the MTC equipment of low priority, abbreviate intelligent electric meter as MD below) that is in the Idle state read the broadcast that eNB sends and obtain above-mentioned information.
Step S503, MD have UL (Uplink) data to send, and need access network, meet the condition that triggers random access procedure.
Step S504, MD obtain the Backoff sequence number through the BI territory of reading the BI head among the MAC RAR PDU, and separate the backoff time value of reading correspondence according to table 1, as delay time information.Configuration can know that 3rd sub-frame of RAR receiver window after each PRACH begins according to PRACH, and MD attempts obtaining MAC RAR PDU in the RAR receiver window time.
Step S505, suppose that MD has only successfully obtained 4 time of delays (suppose obtain the first time fail), is respectively: 40ms through behind 5 PRACH; 240ms; 480ms, 960ms, MD will obtain that time of failure and think 0ms time of delay; MD gets the value of obtaining for the last time time of delay, obtains access delay value T=960ms.
Step S506, terminal and network side are at first arranged the mapping table of an access delay value T and the ACB parameter adjustment factor:
The mapping table of table 4 access delay value, the AC barring factor adjustment factor and the AC barring time adjustment factor
| Access delay value T | AC barring factor adjusts the factor | AC barring time adjusts the factor |
| 0ms＜＝T＜40ms | 1.0 | 1 |
| 40ms＜＝T＜120ms | 0.8 | 2 |
| 120ms＜＝T＜240ms | 0.5 | 4 |
| 240ms＜＝T＜480ms | 0.3 | 8 |
| 480ms＜＝T＜＝960ms | 0.1 | 16 |
According to last table, the terminal obtains the ACB parameter adjustment factor, is respectively: the AC barring factor adjustment factor=0.1, AC barring time adjust the factor=16;
The terminal uses the original ACB parameter of above-mentioned factor pair oneself to adjust, and it is following to obtain new parameter:
The new original AC barring of AC barring factor=0.1* factor=0.1*0.9=0.09;
The new original AC barring of AC barring time=16* time=16*10ms=160ms.
After step S507, the own original ACB parameter of terminal adjustment, carry out access control according to new parameter.
Content of the present invention also can be applied in other equally need accomplish up synchronous communication system just through sending uplink synchronous sequence.UMTS system for example, the method for embodiment and MAC laminar flow journey also can be used in said system.
Need to prove; Can in computer system, carry out in the step shown in the flow chart of accompanying drawing such as a set of computer-executable instructions; And; Though logical order has been shown in flow chart, in some cases, can have carried out step shown or that describe with the order that is different from here.
The embodiment of the invention provides a kind of access control system, and this access control system can be used to realize above-mentioned connection control method.Fig. 6 is the structured flowchart according to the access control system of the embodiment of the invention, and is as shown in Figure 6, comprises terminal 62 and network side 64, and wherein terminal 62 comprises acquisition module 622, adjusting module 624 and access control module 626.Be described in detail in the face of its structure down.
Acquisition module 622 is used to obtain the access delay temporal information from network side 64; Adjusting module 624 is connected to acquisition module 622, is used for the access delay temporal information obtained according to acquisition module 622, adjusts self corresponding access control limiting parameter; Access control module 626 is connected to adjusting module 624, is used to use adjusting module 624 adjusted access control limiting parameters to carry out access control.
Need to prove that the access control system of describing among the device embodiment is corresponding to above-mentioned method embodiment, its concrete implementation procedure had been carried out detailed description in method embodiment, repeat no more at this.
In sum, according to the abovementioned embodiments of the present invention, a kind of connection control method and system are provided.The present invention is initiating access at random before according to indicating the time of delay among the MAC RAR PDU through the terminal; Obtain the access congestion situation of network side; Thereby the ACB access control parameter of obtaining is carried out corresponding adjustment, to realize to inserting the first quick access control that passes of preamble at random.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize by calculation element.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (18)
1. a connection control method is characterized in that, comprising:
The terminal gets access to the access delay temporal information from network side;
Self corresponding access control limiting parameter is adjusted according to the said access delay temporal information of obtaining in said terminal;
Said terminal uses adjusted said access control limiting parameter to carry out access control.
2. method according to claim 1; It is characterized in that the access delay temporal information that the terminal gets access to from network side comprises: said terminal gets access to the said access delay temporal information from said network side through media access control protocol data unit MAC PDU.
3. method according to claim 2; It is characterized in that said terminal comprises through the said access delay temporal information that MAC PDU gets access to from said network side: said terminal gets access to the said access delay temporal information from said network side through medium access control accidental access response protocol Data Unit MAC RAR PDU.
4. method according to claim 3; It is characterized in that said terminal comprises through the said access delay temporal information that MAC RAR PDU gets access to from said network side: the rollback Backoff time that said terminal will get access to through said MAC RAR PDU is as said access delay temporal information.
5. according to each described method in the claim 1 to 4, it is characterized in that if said access delay temporal information is classified according to terminal type, then said terminal only obtains the access delay temporal information corresponding with self type.
6. method according to claim 1 is characterized in that, said terminal is according to the said access delay temporal information of obtaining, and adjusts self corresponding access control limiting parameter and comprises:
The said access delay temporal information that said terminal will obtain is as the access delay value;
Said access delay value is used at said terminal, adjusts self corresponding access control limiting parameter.
7. method according to claim 6 is characterized in that, if said terminal obtains the failure of said access delay temporal information, it is one of following that then said method also comprises:
It is zero that said terminal is provided with said access delay value;
Said access delay temporal information is continued to obtain in said terminal, and reaches under the situation of pre-determined number at the number of times that obtains said access delay temporal information failure continuously, and it is zero that said access delay value is set.
8. method according to claim 1 is characterized in that, said terminal is according to the said access delay temporal information of obtaining, and adjusts self corresponding access control limiting parameter and comprises:
Said terminal repeatedly obtained the access delay temporal information before sending first at random Access Preamble;
The minimum value of the delay time that said terminal is corresponding with the said access delay temporal information of repeatedly obtaining or maximum or mean value are as the access delay value, and the delay time of the access delay temporal information correspondence that perhaps said terminal will obtain for the last time is as the access delay value;
Said access delay value is used at said terminal, adjusts self corresponding access control limiting parameter.
9. method according to claim 8 is characterized in that, said terminal repeatedly obtained the access delay temporal information and comprises one of following before sending first at random Access Preamble:
Said terminal continues reading times according to predefined access delay temporal information; Repeatedly obtain said access delay temporal information, wherein said access delay temporal information continues reading times and is used to indicate said terminal to continue to read the number of times of said access delay temporal information;
Said terminal continues time for reading according to predefined access delay temporal information; Repeatedly obtain said access delay temporal information, wherein said access delay temporal information continues time for reading and is used to indicate said terminal to continue to read the time span of said access delay temporal information.
10. method according to claim 9 is characterized in that, said terminal is through comprising one of following mode, sets that said access delay temporal information continues reading times and/or said access delay temporal information continues time for reading:
Said terminal and said network side are made an appointment, and said access delay temporal information continues reading times and/or said access delay temporal information continues time for reading;
Said terminal receives the broadcast from said network side, and wherein said broadcast is used to notify said access delay temporal information to continue reading times and/or said access delay temporal information continues time for reading;
Said terminal receives the dedicated signaling from said network side, and wherein said dedicated signaling is used to notify said access delay temporal information to continue reading times and/or said access delay temporal information continues time for reading;
Said terminal disposes said access delay temporal information voluntarily and continues reading times and/or the lasting time for reading of said access delay temporal information.
11. method according to claim 8 is characterized in that, if said terminal repeatedly obtains and once obtains the failure of said access delay temporal information in the said access delay temporal information, it is one of following that then said method also comprises:
It is zero that said terminal is provided with the said access delay value that this time obtain;
Said terminal continues reading times with said access delay temporal information and increases by one, and increases continuously under the situation that reaches pre-determined number in the lasting reading times of said access delay temporal information, and it is zero that said access delay value is set.
12. method according to claim 1 is characterized in that, said terminal is according to the said access delay temporal information of obtaining, and adjusts self corresponding access control limiting parameter and comprises:
Said terminal repeatedly obtained the access delay temporal information before triggering inserts process at random;
The minimum value of the delay time that said terminal is corresponding with the said access delay temporal information of repeatedly obtaining or maximum or mean value are as the access delay value, and the delay time of the access delay temporal information correspondence that perhaps said terminal will obtain for the last time is as the access delay value;
Said access delay value is used at said terminal, adjusts self corresponding access control limiting parameter.
13. method according to claim 12 is characterized in that, said terminal trigger insert process at random before, repeatedly obtain the access delay temporal information and comprise one of following:
Said terminal continues to obtain said access delay temporal information;
Said terminal repeatedly obtains the access delay temporal information according to the predefined cycle.
14. method according to claim 12 is characterized in that, if said terminal repeatedly obtains and once obtains the failure of said access delay temporal information in the said access delay temporal information, it is one of following that then said method also comprises:
It is zero that said terminal is provided with the said access delay value that this time obtain;
The said access delay temporal information that this time obtained is not added up at said terminal.
15. method according to claim 12 is characterized in that, all fails if said terminal repeatedly obtains said access delay temporal information, it is zero that then said terminal is provided with said access delay value.
16., it is characterized in that said access delay value is used at said terminal according to the described method of claim 6 to 15, adjust self corresponding access control limiting parameter and comprise:
Said access delay value is used at said terminal, the mapping obtain AC barring factor value and/or AC barring time value, and with it as adjusted access control limiting parameter;
Said access delay value is used at said terminal; Mapping obtains the AC barring factor adjustment factor and/or the AC barring time adjustment factor; And use the said AC barring factor adjustment factor and/or the said AC barring time adjustment factor, adjust self corresponding access control limiting parameter.
17. method according to claim 16 is characterized in that, the said AC barring factor adjustment factor and/or the said AC barring time adjustment factor are used in said terminal, adjust self corresponding access control limiting parameter and comprise one of following:
Said terminal with the product of the AC barring factor value at the said AC barring factor adjustment factor and/or the said AC barring time adjustment factor and terminal self and/or AC barring time value as adjusted access control limiting parameter;
Said terminal with the AC barring factor value at the said AC barring factor adjustment factor and/or the said AC barring time adjustment factor and terminal self and/or AC barring time value and as adjusted access control limiting parameter.
18. an access control system is characterized in that, comprises terminal and network side, wherein said terminal comprises:
Acquisition module is used to obtain the access delay temporal information from network side;
Adjusting module is used for adjusting self corresponding access control limiting parameter according to the said access delay temporal information of obtaining;
The access control module is used to use adjusted said access control limiting parameter to carry out access control.
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| CN113473571A (en) * | 2021-06-29 | 2021-10-01 | 中信科移动通信技术股份有限公司 | Cell access control method, device and base station |
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