CN102740374B - Connection control method and system - Google Patents
Connection control method and system Download PDFInfo
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- CN102740374B CN102740374B CN201110082268.0A CN201110082268A CN102740374B CN 102740374 B CN102740374 B CN 102740374B CN 201110082268 A CN201110082268 A CN 201110082268A CN 102740374 B CN102740374 B CN 102740374B
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Abstract
The invention provides a kind of connection control method and system, this method includes：Terminal gets the access delay temporal information from network side；Terminal adjusts itself corresponding Access Control limitation parameter according to the access delay temporal information of acquisition；Terminal carries out Access Control using the Access Control limitation parameter after adjustment.The present invention can be realized quickly accesses control to what Stochastic accessing preamble head were passed.
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's communication (Human to Human, referred to as H2H) refers to that people is communicated by the operation to equipment, existing
It is that the Communication Development based on H2H is got up to have wireless communication technology, and machine and machine communication (Machine to Machine,
Referred to as M2M) sensu lato definition be by core of machine terminal intelligent interaction, the application and service of networking, it is base
In intelligence machine terminal, using communication as access means, the informatization resolve scheme provided for client, for meeting visitor
Family is to the information system requirement in terms of monitoring, command scheduling, data acquisition and measurement.
The development of wireless technology is the key factor of M2M market developments, and it breaches the space-time limitation of conventional communication mode
With region obstacle, enterprise and the public has been broken away from cable constraint, allow client more effectively control cost, reduction mounting cost and
It is easy to use.Constantly advanced in addition, growing demand driving M2M, with information processing capability and Netowrk tape
Wide constantly to increase paradoxically, the means of acquisition of information lag far behind, and M2M meets this demand of people well,
External environment condition can be monitored in real time by technology people, realize the information gathering of a wide range of automation.Therefore, M2M can be answered
For fields such as sector application, domestic. applications, individual applications, industry application field use for example：Traffic monitoring, alarm system
System, rescue at sea, automatic vending machine, drive pay etc., domestic application domain use for example：Automatic data logging, temperature control
Deng, individual application field use for example：Life detection, remote diagnostics etc..
M2M communication object is the data communication definition between Machine To Machine or Human-to-Machine, one or more machines
For machine type communication (Machine Type Communication, referred to as MTC), in this case less need for it is man-machine mutually
It is dynamic, MTC machine is participated in, MTC device (MTC device, referred to as MD) is defined as.MTC device is the terminal of MTC user, can
By public land mobile network (Public Land Mobile Network, referred to as PLMN) network and MTC device,
MTC server is communicated.
Introduce after M2M applications, some optimizations can be carried out to existing system according to its feature, to meet M2M application demands,
And influence is not produced on the common H2H equipment in existing system.Some distinguishing features of M2M applications include：MTC device quantity
It is huge, the remote super existing H2H equipment of quantity；Data transfer is regular, and the data volume transmitted every time is small；The mobility of MTC device
Relatively low, substantial portion of MTC device is not moved.
, it is necessary to initiate Stochastic accessing during MTC device access network, Fig. 1 is based on competing in the LTE system according to correlation technique
The flow chart for the random access procedure striven, as shown in figure 1, at Long Term Evolution (Long Term Evolution, referred to as LTE)
In, the random access procedure based on competition mainly includes steps S102 to step S108.
Step S102：User equipment (User Equipment, referred to as UE) randomly chooses a prefix code
(Preamble), sent out on Physical Random Access Channel (Physical Random Access Channel, referred to as PRACH)
Send.
Step S104：Base station (eNB) is after the transmission of Preamble codes has been detected, descending transmission accidental access response
Following information is generally comprised in (Random Access Response, referred to as RAR), the accidental access response：Received
Preamble codes numbering, received the corresponding time adjustment amount of Preamble codes, be the terminal distribution ascending resource
Position indication information, interim Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (Temporary Cell Radio Network
Temporary Identifier, referred to as Temporary C-RNTI) distribution.
Terminal is in a time window (RA Response window) interior receiving random access response (RAR), this time
Window agreement has clear and definite regulation, is the length (ra- of time window since terminal has sent the 3rd subframe after prefix code
ResponseWindowSize) configured by system message.After this time window receives accidental access response, terminal parsing is obtained
The ascending resource position indication information of distribution, interim Cell Radio Network Temporary Identifier/Identity, Cell-RNTI etc..If do not had in this time window
RAR is received, then terminal thinks the detection failure of this Stochastic accessing prefix, prepare to initiate second of Stochastic accessing prefix transmission.
Fig. 2 is the structural representation of MAC PDU in the LTE system according to correlation technique, as shown in Fig. 2 carrying RAR matchmaker
Body Access Control (MediaAccess Control, referred to as MAC) RAR protocol Data Units (Protocol Data Unit,
Referred to as PDU) content is filled by 1 MAC header (header) and 0 or multiple MAC RAR and optional (optional)
(padding) constitute.Wherein MAC header are by 1 rollback (backoff) subheader (subheader), 0 or multiple RAR
Subheader is constituted.Backoff values wherein are contained in backoff subheaders, each RAR subheader then correspond to each MAC
RAR.The effect of backoff values is the transmission for allowing the UE of random access failure not initiate second of Stochastic accessing prefix at once, and
It is to wait for after a period of time (time span is from 0 to an equally distributed random value backoff values), then initiates the
The transmission of secondary Stochastic accessing prefix, can so reduce access collision probability, reduce access congestion.
Wherein backoff subheaders are the subheaders of an optional transmission, generally only there is a situation where to access congestion in network
Under, network side can send backoff subheaders.
Fig. 3 is the schematic diagram of Backoff subheaders in MAC RARPDU in the LTE system according to correlation technique.
“E”：If " 1 ", represent there be other subheaders behind the subheader；If " 0 ", represent the subheader and be followed by
MACRAR or padding；
“T”：If " 1 ", it is backoff subheaders to represent this subheader；Otherwise, it is RAR subheaders (RAR to represent this subheader
There is no " BI " domain in head, but have " RAPID " domain, wherein placing the corresponding lead code sequence number of the RAR subheaders)；
“R”：Reservation bit position, is set to 0, the UE of early version will not read these reservation bits position；
“BI”：Totally 4 bit, places the sequence number of backoff values, the corresponding relation between sequence number and the backoff values of reality
It is as shown in the table.
Sequence number in the correlation technique of table 1 and the mapping table between the backoff values of reality
| Sequence number (Index) | Backoff values (unit ms) |
| 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 |
When the number of terminals quantitative change in network is more, when great amount of terminals initiates random access request simultaneously and is linked into network, network
In access lead code resource may occur not enough situation, cause a large amount of MTC terminals to occur access interference, therefore, when
When eNB detects network load change weight, the Stochastic accessing row of terminal can be broken up in time-domain by adjusting backoff values
To reduce access interference probability.
Step S106：UE, according to its instruction, sends up after accidental access response is received on the ascending resource of distribution
Message.The upstream message is also known as Message 3 (Msg3), and wherein at least should be included：The unique mark (TMSI) of the terminal or
Person's random identification (Random ID), and set up reason (Establishment Cause).
Step S108：Base station receives UE upstream message, and returns to contention resolution message to the UE being successfully accessed
(Contention Resolution, also known as Msg4).Disappear if UE receives this before Conflict solving timer expiry
Breath, and confirm that the Msg4 is the desired Msg4 of UE through unpacking, it is determined that this time random access procedure success；Otherwise can not determine
Work(, UE initiates Stochastic accessing again.UE initiates Stochastic accessing again to be needed to restart from step S102.
In addition, the event of Stochastic accessing process is triggered in LTE system to be included：(1) idle (idle) state is initially accessed；
(2) RRC connection reconstructions process；(3) (HO, Handover) is switched；(4) connection status downlink data is reached；And (5) connection shape
State upstream data is reached.
When user equipment send prefix code number of times exceed maximum transmission times (preambleTransMax), that is, send before
When sewing synchronous codes number equal to preambleTransMax+1, this random access failure.Because the Stochastic accessing of LTE system is in matchmaker
Body Access Layer is implemented, after random access failure, and MAC layer needs to notify failure to the upper strata of user equipment.User equipment it is upper
If layer still has the demand of initiation business, MAC layer can be triggered and initiate Stochastic accessing again.
But, after MTC device is introduced, due to the participation of nobody, (needed when MTC device there are data to need transmission
When initiating business), the initiation Stochastic accessing that MTC device will be persistently is sent successfully up to data, and due to the number of MTC device
Amount is huge, and numerous MTC devices, which repeatedly sends data, will consume substantial amounts of Radio Resource particularly random access resource, also,
If the MTC device quantity for initiating data transfer simultaneously is very big, Stochastic accessing will be caused to overload, this will cause all user equipmenies
The random access failure that (H2H equipment and MTC device) is initiated, and user equipment can also be again after this random access failure
Stochastic accessing is initiated, so that Stochastic accessing is constantly in overload, network can not recover normal condition.
In existing system there is shortcoming in the existing settlement mechanism for access-in resource congestion, it is impossible to tackles a large amount of MTC and sets
The standby short time concentrates the scene for initiating Stochastic accessing.For example, Access Control limitation (the Access Control in existing mechanism
Barring, referred to as ACB) mechanism be by access network elements by broadcast the message send ACB Access Control parameters come control terminal
Access ratio and require terminal carry out delay access, its major defect is exactly that the renewal speed of ACB control parameters is
The limitation (update times hourly are limited) of system broadcast message renewal speed, control instruction reaction and renewal speed are slow, nothing
The access congestion that the method reply short time occurs (change of access congestion from low to high may occur within the several seconds).Wherein, ACB connects
Entering control parameter includes：Access Control restriction factor AC barring factor (0~1 decimal)；Access Control limits the time
AC barring time (4~512 seconds)
Access control mechanism defines 16 access grades (Access Class, referred to as AC) altogether, wherein, AC 0~
9 correspond to ordinary call, and AC 10 corresponds to urgent call, and AC 11~15 corresponds to other special callings.For AC 0~
9, network side is that each AC sets corresponding AC barring factor, and for AC 10~15, network side is each
Individual AC sets 1bit access restriction mark, and above-mentioned Access Control parameter is broadcast to terminal by system message.When right
Should be when a certain AC terminal be accessed, if the AC of the terminal belongs to 0~9, terminal can be produced between one 0~1
Uniform random number, if the random number is less than the AC barring factor corresponding to AC, the terminal can be accessed, no
Then, in delay a period of time, (time delay calculates the terminal according to AC barring time：Time delay=(0.7+0.6*
Rand) * AC_barring_time, wherein rand be greater than be equal to 0 be less than 1 a uniform random number) after reattempt
Access；If the AC of the terminal belongs to 11~15, if AC is corresponding to be designated 0, the terminal can be accessed, and otherwise can not be connect
Enter；If the AC of the terminal is 10, if AC is corresponding to be designated 0, the terminal can be accessed, and otherwise can not be accessed.
Another Backoff (rollback) mechanism is to be passed through by access network elements to have sent Access Preamble (preamble)
Terminal feedback message in carry Backoff persond eixis (carried with the backoff subheaders in MAC RAR PDU,
See the explanation of foregoing backoff subheaders, the Backoff persond eixis is included in accidental access response Medium Access Control (MAC) Protocol Data Unit
In (Protocol Data Unit, abbreviation PDU)) come cause those prefixes detection failure end delay for a period of time after weigh again
It is new to send preamble, so as to reduce preamble collision probabilities.Although Backoff mechanism reaction speed is quickly, it is due to
Its preamble that can only postpone to retransmit is sent, and the first preamble passed can not be controlled to send, therefore for a large amount of MTC devices
Short time concentrates the solution effect for initiating Stochastic accessing still undesirable.
In correlation technique also propose introduce classification Backoff or classification ACB method, so-called classification aiming at
The terminal (such as terminal of MTC types or the terminal of low priority) of new type set independent Backoff indicate or
ACB parameters.But this method still can not solve ACB mechanism reaction speed slowly and Backoff mechanism can only be controlled
The shortcoming that preamble is retransmitted.
The content of the invention
Initiate the problem of Stochastic accessing can cause access-in resource overload, can not smoothly recover simultaneously for great amount of terminals and carry
Go out the present invention, therefore, it is a primary object of the present invention to provide a kind of connection control method and system, to solve the above problems.
To achieve these goals, according to an aspect of the invention, there is provided a kind of connection control method.
Included according to the connection control method of the present invention：Terminal gets the access delay temporal information from network side；
Terminal adjusts itself corresponding Access Control limitation parameter according to the access delay temporal information of acquisition；After terminal is using adjustment
Access Control limitation parameter carry out Access Control.
Further, terminal gets the access delay temporal information from network side and included：Terminal is obtained by MAC PDU
Get the access delay temporal information from network side.
Further, terminal gets the access delay temporal information from network side by MAC PDU and included：Terminal is led to
Cross MAC RAR PDU and get the access delay temporal information from network side.
Further, terminal gets the access delay temporal information from network side by MAC RAR PDU and included：Eventually
End regard the Backoff times got by MAC RARPDU as access delay temporal information.
Further, if access delay temporal information is classified according to terminal type, terminal is only obtained and itself
The corresponding access delay temporal information of type.
Further, terminal adjusts itself corresponding Access Control limitation ginseng according to the access delay temporal information of acquisition
Number includes：Terminal regard the access delay temporal information of acquisition as access delay value；Terminal uses access delay value, adjusts itself
Corresponding Access Control limits parameter.
Further, if terminal obtains the failure of access delay temporal information, the above method also includes one below：Eventually
End sets access delay value to be zero；Terminal continues to obtain access delay temporal information, and is continuously acquiring access delay time letter
In the case that the number of times of breath failure reaches pre-determined number, it is zero to set access delay value.
Further, terminal adjusts itself corresponding Access Control limitation ginseng according to the access delay temporal information of acquisition
Number includes：Terminal repeatedly obtains access delay temporal information before Stochastic accessing prefix first is sent；Terminal will be obtained repeatedly
The corresponding delay time of access delay temporal information minimum value or maximum or average value as access delay value, or
Person's terminal regard the corresponding delay time of access delay temporal information that last time is obtained as access delay value；Terminal is using connecing
Enter length of delay, adjust itself corresponding Access Control limitation parameter.
Further, terminal obtains access delay temporal information before Stochastic accessing prefix first is sent, repeatedly and included
One below：Terminal continues reading times according to access delay temporal information set in advance, repeatedly obtains the access delay time
Information, wherein access delay temporal information, which continue reading times, is used for time that instruction terminal persistently reads access delay temporal information
Number；Terminal continues read access time according to access delay temporal information set in advance, repeatedly obtains access delay temporal information, its
Middle access delay temporal information, which continues read access time, is used for the time span that instruction terminal persistently reads access delay temporal information.
Further, terminal is by way of including one below, and setting access delay temporal information continues reading times
And/or access delay temporal information continues read access time：Terminal and network side access delay temporal information of making an appointment persistently are read
Number of times and/or access delay temporal information is taken to continue read access time；Terminal receives the broadcast message from network side, wherein extensively
Broadcasting message is used to notify that access delay temporal information continues reading times and/or access delay temporal information continues read access time；
Terminal receives the dedicated signaling from network side, and wherein dedicated signaling is used to notify access delay temporal information is persistently read secondary
Number and/or access delay temporal information continue read access time；Terminal voluntarily configures access delay temporal information and continues reading times
And/or access delay temporal information continues read access time.
Further, if terminal repeatedly obtains the once acquisition access delay temporal information in access delay temporal information
Failure, then the above method is also including one below：Terminal sets the access delay value of this acquisition to be zero；Terminal is by access delay
Temporal information continues reading times increase by one, and in access delay temporal information continues reading times and increase continuously to reach predetermined time
In the case of number, it is zero to set access delay value.
Further, terminal adjusts itself corresponding Access Control limitation ginseng according to the access delay temporal information of acquisition
Number includes：Terminal repeatedly obtains access delay temporal information before triggering Stochastic accessing process；Terminal is by connecing for repeatedly obtaining
Enter the minimum value of the corresponding delay time of delay time information either maximum or average value as access delay value or eventually
The corresponding delay time of access delay temporal information for obtaining last time is held to be used as access delay value；Terminal is prolonged using access
Value, adjusts itself corresponding Access Control limitation parameter late.
Further, terminal obtains access delay temporal information including following before triggering Stochastic accessing process, repeatedly
One of：Terminal persistently obtains access delay temporal information；Terminal repeatedly obtains the access delay time according to the cycle set in advance
Information.
Further, if terminal repeatedly obtains the once acquisition access delay temporal information in access delay temporal information
Failure, then the above method is also including one below：Terminal sets the access delay value of this acquisition to be zero；Terminal does not count this time
The access delay temporal information of acquisition.
Further, if terminal repeatedly obtains access delay temporal information and failed, terminal sets access delay value
It is zero.
Further, terminal uses access delay value, and adjusting itself corresponding Access Control limitation parameter includes：Terminal makes
Access delay value is used, mapping obtains AC barring factor values and/or AC barring time values, and as adjustment
Access Control limitation parameter afterwards；Terminal use access delay value, mapping obtain AC barring factor Dynamic genes and/
Or AC barring time Dynamic genes, and use AC barring factor Dynamic genes and/or AC barring time
Dynamic gene, adjusts itself corresponding Access Control limitation parameter.
Further, terminal using AC barring factor Dynamic genes and/or AC barring time adjustment because
Son, adjusting itself corresponding Access Control limitation parameter includes one below：Terminal is by AC barring factor Dynamic genes
And/or AC barring time Dynamic genes and the AC barring factor values and/or AC barring of terminal itself
The product of time values limits parameter as the Access Control after adjustment；Terminal by AC barring factor Dynamic genes and/or
AC barring time Dynamic genes and the AC barring factor values and/or AC barring time values of terminal itself
And be used as adjustment after Access Control limitation parameter.
To achieve these goals, there is provided a kind of access control system according to another aspect of the present invention.
Terminal and network side are included according to the access control system of the present invention, wherein terminal includes：Acquisition module, for obtaining
Fetch the access delay temporal information of automatic network side；Adjusting module, for the access delay temporal information according to acquisition, adjustment is certainly
The corresponding Access Control limitation parameter of body；Access Control module, for being connect using the Access Control limitation parameter after adjustment
Enter control.
The present invention is indicated by time delay of the terminal before Stochastic accessing is initiated in MAC RAR PDU, is obtained
The access congestion situation of network side, so that the ACB Access Controls parameter to acquisition carries out corresponding adjustment, to realize to connecing at random
Enter preamble head biographies quickly accesses control.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of the random access procedure based on competition in the LTE system according to correlation technique；
Fig. 2 is the structural representation of MAC PDU in the LTE system according to correlation technique；
Fig. 3 is the schematic diagram of Backoff subheaders in MAC RARPDU in the LTE system according to correlation technique；
Fig. 4 is the flow chart of connection control method according to embodiments of the present invention；
Fig. 5 is the flow chart of the connection control method according to the preferred embodiment of the present invention two；
Fig. 6 is the structured flowchart of access control system according to embodiments of the present invention.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
The invention provides a kind of connection control method.Fig. 4 is random access control method according to embodiments of the present invention
Flow chart, as shown in figure 4, including steps S402 to step S406.
Step S402, terminal gets the access delay temporal information from network side.
Step S404, terminal adjusts itself corresponding Access Control limitation ginseng according to the access delay temporal information of acquisition
Number.
Step S406, terminal carries out Access Control using the Access Control limitation parameter after adjustment.
In correlation technique, great amount of terminals initiates Stochastic accessing simultaneously can cause access-in resource overload, can not smoothly recover.This
In inventive embodiments, indicated by time delay of the terminal before Stochastic accessing is initiated in MAC RAR PDU, obtain net
The access congestion situation of network side, so that the ACB Access Controls parameter to acquisition carries out corresponding adjustment, to realize to Stochastic accessing
What preamble head were passed quickly accesses control.
Preferably, terminal gets the access delay temporal information from network side and included：Terminal is obtained by MAC PDU
The access delay temporal information of arrival automatic network side.
Preferably, terminal gets the access delay temporal information from network side by MAC PDU and included：Terminal passes through
MACRAR PDU get the access delay temporal information from network side.
Preferably, terminal gets the access delay temporal information from network side by MAC RAR PDU and included：Terminal
It regard the Backoff times got by MAC RAR PDU as access delay temporal information.
Preferably, if access delay temporal information is classified according to terminal type, terminal is only obtained and itself class
The corresponding access delay temporal information of type.
Preferably, terminal adjusts itself corresponding Access Control limitation parameter according to the access delay temporal information of acquisition
Including：Terminal regard the access delay temporal information of acquisition as access delay value；Terminal uses access delay value, adjusts itself right
The Access Control limitation parameter answered.
Preferably, if terminal obtains the failure of access delay temporal information, the above method also includes one below：Terminal
It is zero to set access delay value；Terminal continues to obtain access delay temporal information, and is continuously acquiring access delay temporal information
In the case that the number of times of failure reaches pre-determined number, it is zero to set access delay value.
Preferably, terminal adjusts itself corresponding Access Control limitation parameter according to the access delay temporal information of acquisition
Including：Terminal repeatedly obtains access delay temporal information before Stochastic accessing prefix first is sent；Terminal will be obtained repeatedly
The minimum value of the corresponding delay time of access delay temporal information either maximum or average value as access delay value or
Terminal regard the corresponding delay time of access delay temporal information that last time is obtained as access delay value；Terminal uses access
Length of delay, adjusts itself corresponding Access Control limitation parameter.
Preferably, terminal is being sent first before Stochastic accessing prefix, repeatedly obtain access delay temporal information include with
It is one of lower：Terminal continues reading times according to access delay temporal information set in advance, repeatedly obtains access delay time letter
Breath, wherein access delay temporal information, which continue reading times, is used for time that instruction terminal persistently reads access delay temporal information
Number；Terminal continues read access time according to access delay temporal information set in advance, repeatedly obtains access delay temporal information, its
Middle access delay temporal information, which continues read access time, is used for the time span that instruction terminal persistently reads access delay temporal information.
Preferably, terminal is by way of including one below, setting access delay temporal information continue reading times and/
Or access delay temporal information continues read access time：Access delay temporal information of terminal and network side making an appointment persistently reads secondary
Number and/or access delay temporal information continue read access time；Terminal receives the broadcast message from network side, wherein broadcast disappears
Cease for notifying that access delay temporal information continues reading times and/or access delay temporal information continues read access time；Terminal
The dedicated signaling from network side is received, wherein dedicated signaling is used to notify access delay temporal information to continue reading times
And/or access delay temporal information continues read access time；Terminal voluntarily configure access delay temporal information continue reading times and/
Or access delay temporal information continues read access time.
Preferably, if the once acquisition access delay temporal information that terminal is repeatedly obtained in access delay temporal information is lost
Lose, then the above method also includes one below：Terminal sets the access delay value of this acquisition to be zero；When terminal is by access delay
Between information continue reading times increase by one, and continue reading times in access delay temporal information and increase continuously and reach pre-determined number
In the case of, it is zero to set access delay value.
Preferably, terminal adjusts itself corresponding Access Control limitation parameter according to the access delay temporal information of acquisition
Including：Terminal repeatedly obtains access delay temporal information before triggering Stochastic accessing process；Terminal is by the access repeatedly obtained
Either maximum or average value are used as access delay value or terminal to the minimum value of the corresponding delay time of delay time information
The corresponding delay time of access delay temporal information that last time is obtained is used as access delay value；Terminal uses access delay
Value, adjusts itself corresponding Access Control limitation parameter.
Preferably, terminal obtained before triggering Stochastic accessing process, repeatedly access delay temporal information include it is following it
One：Terminal persistently obtains access delay temporal information；Terminal obtains access delay time letter according to the cycle set in advance, repeatedly
Breath.
Preferably, if the once acquisition access delay temporal information that terminal is repeatedly obtained in access delay temporal information is lost
Lose, then the above method also includes one below：Terminal sets the access delay value of this acquisition to be zero；Terminal does not count this time and obtained
The access delay temporal information taken.
Preferably, if terminal repeatedly obtains access delay temporal information and failed, terminal setting access delay value is
Zero.
Preferably, terminal uses access delay value, and adjusting itself corresponding Access Control limitation parameter includes：Terminal is used
Access delay value, mapping obtains AC barring factor values and/or AC barring time values, and as adjustment after
Access Control limitation parameter；Terminal use access delay value, mapping obtain AC barring factor Dynamic genes and/or
AC barring time Dynamic genes, and adjusted using AC barring factor Dynamic genes and/or AC barring time
Integral divisor, adjusts itself corresponding Access Control limitation parameter.
Preferably, terminal uses AC barring factor Dynamic genes and/or AC barring time Dynamic genes,
Adjusting itself corresponding Access Control limitation parameter includes one below：Terminal by AC barring factor Dynamic genes and/
Or AC barring time Dynamic genes and the AC barring factor values and/or AC barring time of terminal itself
The product of value limits parameter as the Access Control after adjustment；Terminal is by AC barring factor Dynamic genes and/or AC
The AC barring factor values of barring time Dynamic genes and terminal itself and/or AC barring time values and
Parameter is limited as the Access Control after adjustment.
The implementation process of the embodiment of the present invention is described in detail below in conjunction with example.
Preferred embodiment one
This preferred embodiment one describes implementation model of the quick Stochastic accessing control technology of the present invention in LTE system
Example.
If embodiment scene is LTE system, there are a large amount of MTC (Machine-Type in LTE cells
Communication) equipment and H2H terminals.These MTC devices include (such as intellectual water meter, intelligence for the type that tolerable is delayed
Can ammeter) and not tolerable delayed-type (such as health monitoring instrument, move POS), also including high access priority class
Type (such as fire alarm) and low access priority type (such as intellectual water meter, intelligent electric meter).
First, terminal obtains access from network side by MAC PDU according to setting means and prolonged before Stochastic accessing is initiated
Slow temporal information.
The setting means includes one of following manner：
The terminal obtains once the access delay time letter only after Stochastic accessing process is triggered, then from network side
Breath；
Terminal is obtained only after Stochastic accessing process is triggered, and before Stochastic accessing prefix first is sent from network side
Multiple access delay temporal information is taken, or continues for some time acquisition access delay temporal information；It is wherein described from network side
The number of times or duration for obtaining access delay temporal information can be led to by network side by broadcast message or dedicated signaling
Know terminal, can also in advance be arranged by network side and terminal, can also voluntarily be configured by terminal；
The terminal triggering Stochastic accessing process before (i.e. produce triggering Stochastic accessing event before), i.e., from network
Side obtains the access delay temporal information, and method includes：
The lasting acquisition access delay temporal information of terminal；
Terminal obtains access delay temporal information according to certain cycle, and the cycle can notify terminal by network side,
Can also in advance it be arranged by network side and terminal, can also be by terminal sets itself；
Above-mentioned setting means can inform that terminal (such as increases in one of existing SIB by broadcasting the message by network side
Plus new IE or new message field represent which kind of setting means used), can also in advance it be arranged by network side and terminal；
Further, terminal can by MAC RAR PDU from network side obtain access delay temporal information；
Further, terminal can be used as access delay temporal information by the MAC RAR PDU acquisition Backoff times,
That is, by reading the BI subheaders in MAC RAR PDU can be obtained the Backoff times.
Herein, for reading the BI subheaders in MAC RAR PDU, it is necessary to which explanation, existing LTE system is being sent
During MACRAR PDU, its corresponding PDCCH (physical downlink control channel) dispatch need to use one and MAC RARPDU
The associated code of corresponding Physical Random Access Channel (Physical Random Access Channel, abbreviation PRACH)
To carry out mask, the code is referred to as RA-RNTI (Random Access-Radio Network Temporary
Identifier, random access radio network temporary mark), 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 time and frequency zone resource shared by the PRACH, f_
Id is the frequency domain position sequence number (0≤f_id ＜ 6) of the time and frequency zone resource shared by the PRACH.In other words, no matter terminal
PRACH whether has been used to send preamble, terminal can (these can be from broadcast according to PRACH time-frequency configuration of territory
Obtained in message) calculate corresponding RA-RNTI, and PDCCH is understood accordingly, obtain MAC RAR PDU.
If the access delay temporal information that network side is sent is classification, terminal only receives corresponding with oneself type
Access delay temporal information.
So-called classification refers to that network side is that different type sends different access delay temporal informations respectively.The side of classification
Formula is for example：Classify by terminal equipment type or the business initiated by terminal or terminal to the tolerance classification of time or
The priority classification for the business initiated by terminal or terminal or whether it is roaming terminal classification by terminal or identifies
The group character of terminal.
Terminal determines how according to the access delay temporal information of acquisition and oneself corresponding ACB parameter is adjusted, side
Method includes：
First, terminal calculates access delay value T according to the access delay temporal information of acquisition, then：
Terminal maps out corresponding AC barring factor Dynamic genes and/or AC barring according to T size
Time Dynamic genes, and by the Dynamic gene and original AC barring factor and/or the AC barring of terminal
Time product as terminal new AC barring factor values and/or AC barring time values；
For example, can be mapped in the way of following table：
Pair of the access delay value of table 2, AC barring factor Dynamic genes and AC barring time Dynamic genes
Answer relation table
| Access delay value T | AC barring factor Dynamic genes | AC barring time Dynamic genes |
| 0 ＜=T ＜ T1 | AC barring factor Dynamic genes 1 | AC barring time Dynamic genes 1 |
| T1 ＜=T ＜ T2 | AC barring factor Dynamic genes 2 | AC barring time Dynamic genes 2 |
| T2 ＜=T ＜ T3 | AC barring factor Dynamic genes 3 | AC barring time integral divisors 3 |
| T3 ＜=T ＜ T4 | AC barring factor Dynamic genes 4 | AC barring time Dynamic genes 4 |
| ... | ... | ... |
Upper table can notify terminal by network side, can also in advance be arranged by network side and terminal.
The mode that terminal adjusts oneself original ACB parameter using the Dynamic gene mapped out includes：
One of AC barring factor and AC barring time are only adjusted, or the two is all adjusted.
Or terminal is according to T size, corresponding AC barring factor values and/or AC barring are mapped out
Time values, and as the corresponding new AC barring factor values of terminal and/or AC barring time values；
For example, can be mapped in the way of following table：
The mapping table of the access delay value of table 3, 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 AC barring factor 1 | New AC barring time 1 |
| 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 |
| ... | ... | ... |
Upper table can notify terminal by network side, can also in advance be arranged by network side and terminal.
Terminal is included by the way of the new ACB parameters mapped out：
Only with one of new AC barring factor and new AC barring time, or the two is all adopted
With new.
Terminal is adjusted after oneself original ACB parameter, and Access Control is performed according to new parameter.
Preferred embodiment two
Fig. 5 is the flow chart of the connection control method according to the preferred embodiment of the present invention two, as shown in figure 5, including as follows
Step S501 to step S507.
Network side and terminal arrange in advance obtain access delay temporal information mode be：Terminal only connects when triggering at random
Enter after process, and before Stochastic accessing prefix first is sent, repeatedly (setting number of times as K) the access delay time is obtained from network side
Information.
Step S501, eNB (evolved NodeB, base station) informs the following information of terminal by broadcast message.
Number of times K values, it is assumed that K=5 times；
Physical Random Access Channel (Physical Random Access Channel, abbreviation PRACH) is configured to PRACH
With setting to 0 (first subframe (each subframe 1ms length) of each radio frames (10ms length) has PRACH resources can use),
Preamble is using form 0 (only taking up 1 subframe) (content of above-mentioned PRACH configurations refers to 3Gpp agreement TS36.211)
The ACB parameters of low priority terminal, including：AC barring factor=0.9；AC barring time=
10ms；
Step S502, in Idle states certain Terminal Type (assuming that being intelligent electric meter, belong to the MTC device of low priority,
Intelligent electric meter is referred to as MD below) read the broadcast message acquisition above- mentioned information that eNB is sent.
Step S503, MD has UL (Uplink) data to send, it is necessary to which access network, meets triggering random access procedure
Condition.
Step S504, MD obtains Backoff sequence numbers by reading the BI domains of the BI subheaders in MAC RAR PDU, and presses
Corresponding backoff time values are interpreted according to table 1, delay time information is used as.According to PRACH configuration understand, RAR receive window from
The 3rd subframe after each PRACH starts, and MD is received in RAR and attempted to obtain MAC RAR PDU in the window time.
Step S505, hypothesis are after 5 PRACH, and MD only successfully obtains 4 time delays (assuming that obtaining for the first time
It is failure), be respectively：That time delay for obtaining failure is considered 0ms by 40ms, 240ms, 480ms, 960ms, MD,
MD takes the delay time value that last time is obtained, and obtains access delay value T=960ms.
Step S506, terminal and network side arrange the mapping of access delay value T and ACB a parameter adjustment factor first
Table：
Pair of the access delay value of table 4, AC barring factor Dynamic genes and AC barring time Dynamic genes
Answer relation table
| Access delay value T | AC barring factor Dynamic genes | AC barring time Dynamic genes |
| 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 upper table, terminal obtains the ACB parameter adjustment factors, is respectively：AC barring factor Dynamic genes=
0.1st, AC barring time Dynamic gene=16；
Terminal is adjusted using the original ACB parameters of above-mentioned factor pair oneself, obtains new parameter as follows：
The new original AC barring factor=0.1*0.9=0.09 of AC barring factor=0.1*；
The new original AC barring time=16*10ms=160ms of AC barring time=16*.
Step S507, terminal are adjusted after oneself original ACB parameter, and Access Control is performed according to new parameter.
Present disclosure can also be equally applied to other needs and complete up first by sending uplink synchronous sequence
Synchronous communication system.Such as UMTS system, the method and MAC layer flow of embodiment can also be used in said system.
It should be noted that can be in such as one group computer executable instructions the step of the flow of accompanying drawing is illustrated
Performed in computer system, and, although logical order is shown in flow charts, but in some cases, can be with not
The order being same as herein performs shown or described step.
The embodiments of the invention provide a kind of access control system, the access control system can be used for realizing above-mentioned access
Control method.Fig. 6 is the structured flowchart of access control system according to embodiments of the present invention, as shown in fig. 6, including the He of terminal 62
Network side 64, wherein terminal 62 include acquisition module 622, adjusting module 624 and Access Control module 626.Below to its structure
It is described in detail.
Acquisition module 622, for obtaining the access delay temporal information from network side 64；Adjusting module 624, is connected to
Acquisition module 622, for the access delay temporal information obtained according to acquisition module 622, adjusts itself corresponding Access Control
Limit parameter；Access Control module 626, is connected to adjusting module 624, for using the access control after the adjustment of adjusting module 624
System limitation parameter carries out Access Control.
It should be noted that the access control system described in device embodiment corresponds to above-mentioned embodiment of the method, its
Concrete implementation process had carried out detailed description in embodiment of the method, will not be repeated here.
In summary, there is provided a kind of connection control method and system according to the abovementioned embodiments of the present invention.The present invention is logical
Time delay instruction of the terminal before Stochastic accessing is initiated in MAC RAR PDU is crossed, the access congestion of network side is obtained
Situation, so that the ACB Access Controls parameter to acquisition carries out corresponding adjustment, to realize what is passed to Stochastic accessing preamble head
Quickly access control.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and constituted
Network on, alternatively, the program code that they can be can perform with computing device be realized, it is thus possible to they are stored
Performed in the storage device by computing device, either they are fabricated to respectively each integrated circuit modules or by they
In multiple modules or step single integrated circuit module is fabricated to realize.So, the present invention is not restricted to any specific
Hardware and software is combined.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (16)
1. a kind of connection control method, it is characterised in that including：
Terminal gets the access delay temporal information from network side；
The terminal adjusts itself corresponding Access Control limitation parameter according to the access delay temporal information of acquisition；
The terminal carries out Access Control using the Access Control limitation parameter after adjustment；
Wherein described access delay temporal information includes：The rollback Backoff times；
Wherein, the terminal adjusts itself corresponding Access Control limitation ginseng according to the access delay temporal information of acquisition
Number, including：The terminal adjusts itself corresponding Access Control limitation parameter using the access delay value obtained, including：Mapping
AC barring factor values and/or AC barring time values are obtained, and is limited as the Access Control after adjustment
Parameter；The terminal uses the access delay value, and mapping obtains AC barring factor Dynamic genes and/or AC
Barring time Dynamic genes, and use the AC barring factor Dynamic genes and/or the AC barring
Time Dynamic genes, adjust itself corresponding Access Control limitation parameter.
2. according to the method described in claim 1, it is characterised in that terminal gets the access delay time letter from network side
Breath includes：The terminal is got from described in the network side by media access control protocol data unit MAC PDU
Access delay temporal information.
3. method according to claim 2, it is characterised in that the terminal is got from the net by MAC PDU
The access delay temporal information of network side includes：The terminal passes through medium education accidental access response protocol data list
First MAC RAR PDU get the access delay temporal information from the network side.
4. according to the method in any one of claims 1 to 3, it is characterised in that if the access delay temporal information
Classify according to terminal type, then the terminal only obtains access delay temporal information corresponding with own type.
5. according to the method described in claim 1, it is characterised in that the terminal obtains the access delay in the following manner
Value：
The terminal regard the access delay temporal information of acquisition as access delay value.
6. method according to claim 5, it is characterised in that if the terminal obtains the access delay temporal information
Failure, then methods described is also including one below：
The terminal sets the access delay value to be zero；
The terminal continues to obtain the access delay temporal information, and is continuously acquiring the access delay temporal information failure
Number of times reach pre-determined number in the case of, it is zero to set the access delay value.
7. according to the method described in claim 1, it is characterised in that the terminal obtains the access delay in the following manner
Value：
The terminal repeatedly obtains access delay temporal information before Stochastic accessing prefix first is sent；
The terminal is by the minimum value or maximum of the corresponding delay time of access delay temporal information repeatedly obtained
Access delay temporal information that either average value obtains last time as access delay value or the terminal is corresponding to prolong
When the time be used as access delay value.
8. method according to claim 7, it is characterised in that the terminal before Stochastic accessing prefix first is sent,
Repeatedly obtaining access delay temporal information includes one below：
The terminal continues reading times according to access delay temporal information set in advance, when repeatedly obtaining the access delay
Between information, wherein the access delay temporal information continue reading times be used for indicate the terminal persistently read it is described access prolong
The number of times of slow temporal information；
The terminal continues read access time according to access delay temporal information set in advance, when repeatedly obtaining the access delay
Between information, wherein the access delay temporal information continue read access time be used for indicate the terminal persistently read it is described access prolong
The time span of slow temporal information.
9. method according to claim 8, it is characterised in that the terminal is by way of including one below, setting
The access delay temporal information continues reading times and/or the access delay temporal information continues read access time：
The terminal and the network side access delay temporal information of making an appointment continue reading times and/or the access
Delay time information continues read access time；
The terminal receives the broadcast message from the network side, wherein described broadcast the message for notifying the access to prolong
Slow temporal information continues reading times and/or the access delay temporal information continues read access time；
The terminal receives the dedicated signaling from the network side, wherein the dedicated signaling is used to notify the access to prolong
Slow temporal information continues reading times and/or the access delay temporal information continues read access time；
The terminal voluntarily configures the access delay temporal information and continues reading times and/or the access delay temporal information
Continue read access time.
10. method according to claim 7, it is characterised in that if the terminal repeatedly obtains the access delay
Between the once acquisition access delay temporal information failure in information, then methods described also include one below：
The terminal sets the access delay value of this acquisition to be zero；
The access delay temporal information is continued reading times increase by one by the terminal, and in the access delay temporal information
Continue in the case that reading times increase continuously and reach pre-determined number, it is zero to set the access delay value.
11. according to the method described in claim 1, it is characterised in that the terminal obtains the access and prolonged in the following manner
It is worth late：
The terminal repeatedly obtains access delay temporal information before triggering Stochastic accessing process；
The terminal is by the minimum value or maximum of the corresponding delay time of access delay temporal information repeatedly obtained
Access delay temporal information that either average value obtains last time as access delay value or the terminal is corresponding to prolong
When the time be used as access delay value.
12. method according to claim 11, it is characterised in that the terminal is more before triggering Stochastic accessing process
Secondary acquisition access delay temporal information includes one below：
The terminal persistently obtains the access delay temporal information；
The terminal repeatedly obtains access delay temporal information according to the cycle set in advance.
13. method according to claim 11, it is characterised in that if the terminal repeatedly obtains the access delay
Between the once acquisition access delay temporal information failure in information, then methods described also include one below：
The terminal sets the access delay value of this acquisition to be zero；
The terminal does not count the access delay temporal information of this acquisition.
14. method according to claim 11, it is characterised in that if the terminal repeatedly obtains the access delay
Between information fail, then the terminal sets the access delay value to be zero.
15. according to the method described in claim 1, it is characterised in that the terminal is adjusted using the AC barring factor
Integral divisor and/or the AC barring time Dynamic genes, adjust itself corresponding Access Control limitation parameter including following
One of：
The terminal by the AC barring factor Dynamic genes and/or the AC barring time Dynamic genes with
The AC barring factor values of terminal itself and/or the product of AC barring time values are used as the Access Control after adjustment
Limit parameter；
The terminal by the AC barring factor Dynamic genes and/or the AC barring time Dynamic genes with
The AC barring factor values of terminal itself and/or AC barring time values and be used as the Access Control limit after adjustment
Parameter processed.
16. a kind of access control system, it is characterised in that including terminal and network side, wherein the terminal includes：
Acquisition module, for obtaining the access delay temporal information from network side；
Adjusting module, for the access delay temporal information according to acquisition, adjusts itself corresponding Access Control limitation ginseng
Number；
Access Control module, for carrying out Access Control using the Access Control limitation parameter after adjustment,
Wherein, wherein the access delay temporal information includes：The rollback Backoff times；
Wherein, the adjusting module is also used for the access delay value obtained, adjusts itself corresponding Access Control limitation ginseng
Number, including：Mapping obtains AC barring factor values and/or AC barring time values, and as adjustment after
Access Control limits parameter；The terminal uses the access delay value, and mapping obtains AC barring factor Dynamic genes
And/or AC barring time Dynamic genes, and use the AC barring factor Dynamic genes and/or the AC
Barring time Dynamic genes, adjust itself corresponding Access Control limitation parameter.
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| CN104581967B (en) * | 2013-10-11 | 2018-12-28 | 中国移动通信集团公司 | Contention access resource adjusting method, contention access request sending method and device |
| CN106162920B (en) * | 2015-04-09 | 2020-11-03 | 中兴通讯股份有限公司 | Communication method and device |
| CN107770809B (en) * | 2016-08-22 | 2022-01-07 | 中兴通讯股份有限公司 | Method, base station, terminal and system for controlling data packet transmission |
| US20190246332A1 (en) * | 2016-10-07 | 2019-08-08 | Sony Mobile Communications Inc. | Dynamic access barring |
| US10999875B2 (en) | 2017-04-25 | 2021-05-04 | Huawei Technologies Co., Ltd. | Random access method and apparatus |
| CN107086900B (en) * | 2017-05-08 | 2020-04-10 | 中国人民解放军理工大学 | M2M communication access control optimization method for handling LTE network emergency |
| WO2019061357A1 (en) * | 2017-09-29 | 2019-04-04 | 北京小米移动软件有限公司 | Random access configuration method and device |
| CN110418371B (en) * | 2018-04-28 | 2021-08-06 | 中国移动通信有限公司研究院 | Control method, network equipment and terminal |
| RU2762340C1 (en) * | 2018-05-31 | 2021-12-20 | Бейдзин Сяоми Мобайл Софтвэр Ко., Лтд. | Method and device for restricting access |
| WO2020025023A1 (en) * | 2018-08-01 | 2020-02-06 | Oppo广东移动通信有限公司 | Random access method, terminal device and network device |
| CN113473571B (en) * | 2021-06-29 | 2022-10-21 | 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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