CN102378364A - Random access method and system realizing same - Google Patents
Random access method and system realizing same Download PDFInfo
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- CN102378364A CN102378364A CN2010102625409A CN201010262540A CN102378364A CN 102378364 A CN102378364 A CN 102378364A CN 2010102625409 A CN2010102625409 A CN 2010102625409A CN 201010262540 A CN201010262540 A CN 201010262540A CN 102378364 A CN102378364 A CN 102378364A
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- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
- H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
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Abstract
The invention relates to a random access method and a system realizing the same. The random access method comprises the following steps that: a reference backspace time is previously configured in a machine-type-communication equipment (ME) or the reference backspace time is transmitted to the ME by a network side, and the network side transmits an adjustment factor to the ME; and the ME adopts the adjustment factor to adjust the reference backspace time to obtain a special backspace time, and a random access request is transmitted according to the special backspace time when the random access is restarted. A pre-configuration way or a network-side transmission way is adopted in the ME, so the ME acquires the reference backspace time, the adjustment factor is transmitted to the ME through a network-side transmission way, the ME adopts the adjustment factor to adjust the reference backspace time to obtain the special backspace time, so the ME and human-to-human (H2H) equipment can adopt different backspace times to restart the random access process, and the network congestion problem caused by identical backspace time adopted by the H2H equipment and the ME can be solved.
Description
Technical field
The present invention relates to communication technique field, the system that relates in particular to a kind of accidental access method and realize inserting at random.
Background technology
M2M (Machine to Machine, machine) is the notion that proposes nineteen nineties, is the important driving force of development communication technologies.Briefly, M2M is exactly the Internet of machine, and the realization means comprise various networking technologies.The target of M2M technology makes all machinery equipments all possess networking and communication capacity exactly, and its core concept is exactly network all (Network Everything).The communication object of M2M is machine or Human-to-Machine.Data communication between one or more machines is defined as MTC (Machine Type Communication, Machine Type communication), lessly in this case needs human-computer interaction.Participate in the machine of MTC, be defined as the MTC terminal (MTC UE, ME).The MTC terminal is MTC user's terminal, can communicate with other MTC terminals and MTC server through PLMN (public land mobile network).Fig. 1 is the MTC network configuration under LTE (Long Term Evolution) framework, and is as shown in Figure 1, and MTC UE is the terminal equipment through carrier network and the communication of MTC server, the signatory person of MTC be one for the MTC terminal provides the entity of business, comprise a plurality of MTC users.MTC user links to each other with the PLMN network through the MTC server, and the MTC server provides service for MTC user.
In Fig. 1, the chain of command agreement adopts RRC (Radio Resource control) layer protocol on the LTE-Uu interface, and rrc layer is the core of EUTRAN (universal land radio access web) RRM, comprises functions such as system message and paging.System information (SI) is the RRC message of carrying the system information block (SIB) with identical dispatching cycle, that is to say that SI is the transmission container of SIB.Each SIB comprises the relevant system parameters of a cover content.SIB has polytype, mainly comprises MIB (host system message block), SIB1 and SIBn (n=1...11), and loaded information has nothing in common with each other in these message blocks.
It is as shown in Figure 2 that UE (subscriber equipment) obtains the process of system information; If the content of system information changes; Beep-page message is sent to UE in the base station, and comprises that in beep-page message system information changes indication (system Info Modification), and UE executive system information is obtained flow process so.The signaling procedure of base station calling UE is as shown in Figure 3, when beep-page message is sent to UE in the base station, sends P-RNTI (paging-Radio Network Temporary Identifier) at PDCCH (Physical Downlink Control Channel).UE after reading P-RNTI on the PDCCH channel, the particular content of reading gating message on PDSCH.For the MTC terminal, can increase a paging mark MTC_P_RNTI newly, when common UE reads this mark, content that can reading gating message.
Inserting at random is a most basic function at terminal in the wireless communication system, and it connects terminal and network becomes possibility.Just as its name, the initiation of this access and the resource of employing have randomness, insert successfully also to have randomness.Have access to two kinds of patterns at random: based on competitive mode with based on non-competing pattern.The flow process of the random access procedure of these two kinds of patterns is different, is applicable to different scene.
Access at random based on competitive mode is applicable to: the initial access under RRC_IDLE (radio link layer _ free time) state; The Radio Link later initial access that makes mistakes; Under RRC_CONNECTED (radio link layer _ connection) state, transmitting uplink data.
Access at random based on non-competing pattern is applicable to: under the RRC_CONNECTED state, and downlink data transmission; The random access procedure of terminal in handoff procedure.
Fig. 4 is in the prior art, and the random access procedure based on competitive mode comprises:
401: subscriber equipment (UE) sends random access lead code to evolved base station (eNB);
UE selected a send opportunity at random from the available send opportunity of access at random before initiating to insert request at random, from available lead code set, select a lead code equiprobably at random and selected lead code is sent to the base station.
402:eNB sends to UE and inserts response message at random;
ENB certain insert at random correctly solve one or more lead code on the send opportunity after, calculate corresponding RA-RNTI (access-Radio Network Temporary Identifier at random) according to send opportunity.Generate access at random as shown in Figure 5 according to above-mentioned information and reply medium Access Layer Packet Data Unit (RAR MACPDU), as shown in Figure 5, son head in the MAC head and the RAR field in the payload are one to one.
In addition, eNB also can judge whether to add rollback among the MAC PDU (rollback, BO) sub-head have carried the rollback time in the rollback head inserting at random to reply according to the current load state that inserts at random.Its effect is to use the family when random access collision takes place, not carry out lead code in the available access chance at random of the next one immediately and sends, and resends lead code again but when keeping out of the way through one section, delay, thereby reduces the probability that bumps between the user.
The structure of rollback head is as shown in Figure 6; Field E is used for representing whether BI field back has the sub-head of E-T-RAPID form; Field T is used for representing that in the field after this field be BI or RAPID, and two field R represent two bits reserving, when H2H (Human To Human's communication) type UE (R8 and R9 terminal) reads these two reserved fields; The value of ignoring these two fields, BI field represent that UE inserts the scope of choosing of rollback time at random.
403: terminal recognition, UE sends the RRC message of band ID to eNB;
A plurality of UE in step 401 if selected identical lead code to send at identical send opportunity; Have a plurality of UE in step 402 so and receive identical access response message at random; These UE have identical C-RNTI (Cell Radio Network Temporary Identifier/Identity, Cell-RNTI), comprise in the message 3 (RRC message) can unique identification different UEs information.
404: competition is eliminated, and eNB sends collision to UE and solves message.
In same uplink authorization, send the message 3 of oneself simultaneously owing to have a plurality of UE; ENB therefrom correct Solution accesses a message 3; On PDCCH, send message 4 (collision solves message), PDCCH (Physical Downlink Control Channel) content corresponding with message 4 carried out scrambling with the C-RNTI of the UE that comprises in the message 3.UE adopts one's own C-RNTI to receive PDCCH, if can correctly receive PDCCH, then thinks and inserts successfully at random.
In random access procedure, there are two kinds of situation can adopt fallback mechanism.A kind of is to insert at random to reply unusually, if be exactly UE does not receive its transmission in access is replied at random RAPID specifically, perhaps in certain time length, do not receive to insert at random and replys.A kind of in addition situation is of top step 402, in the UE random access procedure, produces collision, and access failure at random appears in some UE.
In addition, be in when the base station under the situation of overload, for example; At this moment the more resource of sending message 3 or the like of can't reallocating hopes that some UE can postpone a period of time and send RACH (inserting at random) request, can insert at random when replying receiving; Rollback parameter through inserting at random in the response message form realizes; This rollback parameter is exactly the parameter of fallback mechanism, finds to have a rollback indication if monitor the UE that inserts response message at random, will this rollback value be preserved so; In the time need inserting at random again subsequently, can in the rollback value, choose a value from 0 randomly as postponing the time of sending out lead code.In the prior art, the unit of rollback time parameter is a millisecond, can from following 12 values, select one: 0,20,30,40,60,80,120,160,240,320,480 and 960.It is that the base station is confirmed according to the load of machinery systems that the base station sends to the rollback parameter that inserting at random of terminal carry in the response message, all adopts same rollback parameter for the terminal of in a Serving cell, inserting.
Terminal quantity in the MTC network is numerous, initiates to insert at random request simultaneously when being linked into network when great amount of terminals, and the resource in the network will be not enough, and access failure can take place a large amount of MTC equipment, therefore can insert again in the time at rollback.A large amount of at short notice MTC equipment initiate to insert at random request, also can cause the congested of network.
Such as, the electricity meter-reading business has stipulated that MTC equipment sends data in certain specific time to network, needs these MTC equipment to be linked into network simultaneously at special time.When a large amount of MTC equipment were linked into network simultaneously, the likelihood ratio that random access collision takes place was bigger, and access failure at random can appear in a large amount of MTC equipment, these at random the MTC equipment of access failure also can be linked into network again.To be linked into network in a large amount of MTC equipment short time network is caused congestion condition in order to alleviate, need the long rollback time.MTC equipment selects a time to be linked into network again at long rollback in the time.But, in order not influence user's quality of service,, need be linked into network as early as possible usually if random access collision takes place at the H2H terminal, need in access is replied at random, be set the short rollback time.
On the other hand, in some application scenarios, when MTC equipment had time sensitivity, MTC equipment had the access priority higher than common UE, and this moment, MTC equipment was wanted fast access into network, needed to obtain the rollback time littler than H2H terminal.When H2H terminal and MTC equipment when a Serving cell is linked into network, can the distinguishing terminal type and then sends the RAR MAC PDU of difference in the base station.It also is identical replying the rollback time of in same RAR MAC PDU, carrying to inserting at random of different terminal transmission, and the H2H terminal can't get access to the different rollback time with MTC equipment.Therefore in the prior art, can't feed back the different rollback time of access at random to H2H terminal and MTC equipment, thereby can't solve the network congestion that MTC equipment causes in random access procedure.
Summary of the invention
The system that the technical problem that the present invention will solve provides a kind of accidental access method and realizes inserting at random realizes the rollback time that the MTC terminal adopts again initiate different with the H2H terminal to insert at random, is linked into network.
For solving the problems of the technologies described above, a kind of accidental access method of the present invention comprises:
Pre-configured benchmark rollback time or the benchmark rollback time is sent to ME in Machine Type communication terminal (ME) by network side, and network side will be adjusted the factor and send to ME;
ME adopts the adjustment factor pair benchmark rollback time to adjust, and obtains the special-purpose rollback time, when initiating to insert at random again, inserts request at random according to the transmission of special-purpose rollback time.
Further, the rollback time that the basic rollback time adopts when initiating again to insert at random for Human To Human's communication (H2H) terminal, or be a rollback time constant;
The rollback that the basic rollback time adopts for the H2H terminal sends to ME by network side during the time; The basic rollback time is pre-configured among the ME, or sends to ME by network side when being the rollback time constant.
Further, network side sends the rollback time constant and the adjustment factor through system message or beep-page message to ME.
Further, this method also comprises:
Network side is to different Machine Type communication (MTC) grouping, service priority or access priorities; Dispose the corresponding adjustment factor; With the corresponding adjustment factor of different packets, service priority or access priority, send to corresponding M E through system message or beep-page message.
Further, this method also comprises:
Network side carries the identification information of grouping, service priority or access priority in system message or beep-page message, to send to corresponding M E.
Further, network side is according to service priority or access priority, divides into groups to different MTC, and the adjustment factor that configuration is corresponding through will the divide into groups adjustment factor of correspondence of system message or beep-page message, sends to the ME in the grouping.
Further, a kind of accidental access method comprises:
Network side adopts the adjustment factor pair benchmark rollback time to adjust, and obtains the special-purpose rollback time, and the resulting special-purpose rollback time is sent to Machine Type communication terminal (ME);
When ME initiates to insert at random again, send access at random according to the special-purpose rollback time and ask.
Further; Network side is for different Machine Type communication (MTC) grouping, service priority or access priority; Adopt the corresponding adjustment factor; The benchmark rollback time is adjusted, and, sent to the ME under different packets, service priority or the access priority through the special-purpose rollback time that system message or beep-page message will obtain.
Further, a kind of system of inserting at random of realizing comprises: base station and Machine Type communication terminal (ME), and the base station comprises information sending module, and ME comprises the access request module, wherein:
Information sending module is used for the benchmark rollback time and the adjustment factor are sent to the access request module;
Insert request module, be used to adopt the adjustment factor pair to receive or the pre-configured benchmark rollback time is adjusted, obtain the special-purpose rollback time, when initiating to insert at random again, send the request that inserts at random according to the special-purpose rollback time from information sending module.
Further, the rollback time that the basic rollback time adopts when initiating again to insert at random for Human To Human's communication (H2H) terminal, or be a rollback time constant;
Information sending module is sent the rollback time constant and the adjustment factor through system message or beep-page message to inserting request module.
Further, a kind of system of inserting at random of realizing comprises: base station and Machine Type communication terminal (ME), and the base station comprises information sending module, and ME comprises the access request module, wherein:
Information sending module is used for adopting the adjustment factor pair benchmark rollback time to adjust, and obtain the special-purpose rollback time, and the special-purpose rollback time that will obtain sends to the access request module;
Insert request module, when being used for initiating again to insert at random, sending access at random according to the special-purpose rollback time and ask.
In sum; The present invention is employed among the ME pre-configured or make ME obtain the benchmark rollback time by the mode that network side sends, and will adjust the factor by the mode that network side sends and send to ME, and ME adopts and adjusts the factor pair benchmark rollback time and adjust; Obtain the special-purpose rollback time; Make ME and H2H terminal can adopt the differential rollback time to initiate random access procedure again, solved the H2H terminal and adopted identical rollback time, the problem of the network congestion that causes with ME.
Description of drawings
Fig. 1 is based on the MTC network architecture diagram of LTE in the prior art;
Fig. 2 is the flow chart that system message is obtained in the EUTRAN framework in the prior art;
Fig. 3 is the flow chart of paging in the EUTRAN framework in the prior art;
Fig. 4 is a random access procedure flow chart in the prior art;
Fig. 5 is the structural representation that inserts response message MAC PDU in the prior art at random;
Fig. 6 is the sketch map that inserts backoff head in the response message in the prior art at random;
Fig. 7 is the flow chart of the example of this execution mode accidental access method;
Fig. 8 is that this execution mode is realized the Organization Chart of the system of access at random.
Embodiment
Consider when ME is linked into network at random, network congestion can occur, when ME need insert again, need to adopt the at random access rollback time different with H2H terminal (ordinary terminal).In this execution mode, ME adopts the adjustment factor pair benchmark rollback time to adjust, and obtains the special-purpose rollback time, when initiating to insert at random again, inserts request at random according to the transmission of special-purpose rollback time.The rollback time constant that the rollback time of adopting in the time of can ordinary terminal being initiated to insert at random again perhaps presets is as the benchmark rollback time.Network side carries in the response message rollback time that ordinary terminal is suitable for inserting at random, and the ME adjustment inserts rollback time of receiving in the response message at random as the own special-purpose rollback time; The rollback time constant can be preset in ME, also can be preset at network side (like the base station), and adopt system message or beep-page message to notify ME by network side.And preset rollback time constant can be an adjustable parameter, and network side can be adjusted this parameter according to the load of machinery systems.The adjustment factor is notified ME by network side through system message or beep-page message.
For the different special-purpose rollback time of ME employing of realizing that different MTC divide into groups interior; Different service priority; Different access priorities adopts the different special-purpose rollback time; Can be different MTC groupings, service priority or the corresponding adjustment factor of access priority configuration; By eating dishes without rice or wine to different MTC grouping, service priority or access priorities the corresponding adjustment of the ME factor of the ME in the notice packet, access priority or service priority correspondence in system message or in the beep-page message.
For the MTC that realizes different business priority or access priority divides into groups to adopt the different rollback time; Can be according to service priority or access priority; Divide into groups to different MTC, the adjustment factor that configuration is corresponding is divided into groups by the MTC that eats dishes without rice or wine to different business priority or access priority; In system message or in the beep-page message, the notice ME adjustment factor corresponding with different business priority or access priority.
The adjustment factor can be a scale parameter, and the operation that this moment, ME carried out can be that the benchmark rollback time is done multiply operation according to the adjustment factor.The adjustment factor also can be a side-play amount, and this moment, ME can do add operation according to side-play amount to the benchmark rollback time.
Moreover, the base station also can adopt adjustment the factor pair benchmark rollback time to adjust, and obtains the special-purpose rollback time, in system message or beep-page message with special-purpose rollback time announcement to ME.For the MTC block terminal, the base station can be in system message or beep-page message with the MTC grouping corresponding special rollback time announcement at its place to ME.
ME in MT reconnaissance C divides into groups is meant: according to the terminal of contracting or the distribution group sign belongs to the member of certain group dynamically, at this moment, this terminal has group identification (Group ID).
When network side will be adjusted the factor or special-purpose rollback time announcement to ME, existing system message (like SIB2) be can adopt, system message or beep-page message increased newly.The adjustment factor or special-purpose rollback time are notified ME as a cell in the message, specify as follows:
1) if accomplishing through existing SIB message, sends network side; Can adopt so like existing SIB2 system message; Through system message modified flow in the prior art, will adjust the factor or special-purpose rollback time announcement and give ME, that is: network side at first sends beep-page message notice ME system message variation has taken place; ME reads new system message; If the adjustment factor is to certain MTC grouping or service priority or access priority, need in the SIB2 system message, carry the identification information of MTC grouping or service priority or access priority so, identification information is as a cell of SIB2 system message.
2) if be the newly-increased system message of ME, as be designated as SIB-m, be similar to the scheduling mode of SIB system message in the prior art, the schedule information (such as transmitting window and transmission cycle) that increases SIB message newly is configured in SIB1.In beep-page message, increasing an indication information is used to indicate SIB-m whether variation has taken place.If variation has taken place the content among the SIB-m, beep-page message is sent to ME in the base station, carries the indication information that the SIB-m content changes in the message.After ME had received beep-page message, ordinary terminal is the content among the receiving system message SIB-m not, had only ME to receive the content of newly-increased system message.If the adjustment factor is to divide into groups or Service Class or Access Class to certain MTC; Need in newly-increased SIB message, carry MTC so and divide into groups or Service Class or Access Class identification information, these information are notified ME as a cell of SIB message.
3) if the special-purpose rollback time of ME or the adjustment factor are directly sent through beep-page message in the base station.If the rollback time adjustment factor is to certain MTC grouping or service priority or access priority; Need in beep-page message, carry the identification information of MTC grouping or service priority or access priority so, notify ME as a cell of beep-page message.
Carry the adjustment factor in system message that network side (like the base station) can send or the beep-page message when powering on.In running, load when changing in the base station, the size that the adjustment factor that adopts in the back off procedure is inserted at the MTC terminal at random also need be adjusted in the base station, and when adjustment factor size changed, beep-page message or system message were sent to ME again in the base station.If ordinary terminal has been received system message or beep-page message, ignore the value that the adjustment factor pair is answered cell.If ME has received system message or beep-page message,, obtain the special-purpose rollback time of ME through to inserting rollback time or the adjustment of preset rollback time constant in the response message at random.When the load of base station changed, the rollback time of inserting at random that ME is hoped in the base station is respective change also.ME need be given with the up-to-date adjustment factor or special-purpose rollback time announcement in the base station.After ME has received system message or beep-page message, preserve in the message with the adjustment factor or special-purpose rollback time, insert at random in next time and to adopt new the adjustment factor or special-purpose rollback time when needing rollback.
The adjustment factor can be a scale parameter.According to the network load degree, scale factor can be greater than 1 or less than 1 positive number.When the adjustment factor was scale parameter, ME carried out the product operation to the rollback time or the preset rollback time constant that insert at random in replying received.In some application scenarios (such as ATM monitoring), ME need have higher access priority than ordinary terminal, and the rollback of the access at random time ratio ordinary terminal that ME needs is short, and this moment, the base station need feed back to ME less than 1 scale parameter; Otherwise, need the MTC terminal in random access procedure, to adopt the rollback time longer than ordinary terminal, base station feedback gives ME greater than 1 scale parameter.
The adjustment factor can be a time offset, and according to the network load degree, time offset can be a positive number or negative, if during negative, need satisfy the adjusted rollback time greater than zero.If base station adjustment factor to ME feedback in system message or beep-page message is a side-play amount, ME carries out sum operation to the rollback time or the preset rollback time constant that insert at random in replying received so.In some application scenarios (such as the ATM monitoring), ME need have higher access priority than common UE, and the rollback of the access at random time ratio ordinary terminal that ME needs is short, and this moment, the base station need feed back to the minus side-play amount of ME; Otherwise, need the MTC terminal in random access procedure, to adopt the rollback time longer than ordinary terminal, base station feedback gives ME greater than zero side-play amount.
Fig. 7 is an example of this execution mode accidental access method, comprises step:
701:ME sends to the base station and inserts request message at random;
When ME needs access network, can adopt accidental access method etc. to insert like competition.
The trigger condition that ME initiates to insert at random has multiple, as receives trigger messages that network side sends and the ME triggering etc. that powers on.ME can select a send opportunity at random from the available send opportunity of access at random, on selected send opportunity, send and insert request message at random.
702: after the base station receives and inserts request message at random, judge whether that according to self disposal ability enough resources handle the request of access at random that ME initiates;
703:, carry ordinary terminal in the response message and initiate rollback time of inserting at random again inserting at random so if overload conditions appears in the base station;
The rollback time of ordinary terminal is carrying like the BI field among Fig. 6.
704: the base station will be adjusted the factor through beep-page message or system message and send to ME;
The base station can be notified the rollback time constant to ME.
After 705:ME receives and inserts response message at random, obtain the rollback time of ordinary terminal, the rollback time or the rollback time constant of the ordinary terminal that employing adjustment factor pair is received are carried out the adjustment operation, obtain the special-purpose rollback time of ME;
The base station also can directly be notified the special-purpose rollback time of ME and give ME.
The adjustment factor obtains from beep-page message or system message.If MTC divides into groups the special-purpose adjustment factor or special-purpose rollback time, need in beep-page message or system message, carry group character so.
706:ME judges whether to initiate random access procedure again;
If the access response message at random that ME receives occurs unusual, do not receive insert response message at random that such as carrying RAPID or terminal in the response message terminal can be initiated random access procedure again.If ME has adopted same random access lead code with other terminal, will produce collision so, the terminal situation of access failure at random can appear.ME also can initiate to be linked at random the process of network again in this case.
If 707:ME confirms to initiate random access procedure again, choose a value in the time randomly at special-purpose rollback, ME postpones to initiate random access procedure again after the selected time.
Fig. 8 is that this execution mode is realized the system of access at random, comprising: base station and ME, and the base station comprises information sending module, and ME comprises the access request module, wherein:
Information sending module is used for through system message or beep-page message the benchmark rollback time and the adjustment factor being sent to the access request module; The rollback time that the basic rollback time adopts when initiating again to insert at random for Human To Human's communication (H2H) terminal, or be a rollback time constant;
Insert request module, be used to adopt the adjustment factor pair to receive or the pre-configured benchmark rollback time is adjusted, obtain the special-purpose rollback time, when initiating to insert at random again, send the request that inserts at random according to the special-purpose rollback time from information sending module.
Or information sending module adopts the adjustment factor pair benchmark rollback time to adjust, and obtain the special-purpose rollback time, and the special-purpose rollback time that will obtain sends to the access request module;
Insert request module when initiating to insert at random again, send to insert at random according to the special-purpose rollback time and ask.
Other functions of each module please refer to the description of method content in the said system.
Need to prove that the method that the foregoing description one and two provides not only is applicable to the LTE system, also be suitable for other and support paging GSM, for example UMTS, GSM etc.Its difference only is that the different mobile communication system realizes the details difference of paging or sub-district public information, and these difference do not influence the enforcement of method provided by the invention.
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 (11)
1. accidental access method comprises:
Pre-configured benchmark rollback time or the said benchmark rollback time is sent to said ME in Machine Type communication terminal (ME) by network side, and said network side will be adjusted the factor and send to said ME;
Said ME adopts the said benchmark rollback time of said adjustment factor pair to adjust, and obtains the special-purpose rollback time, when initiating to insert at random again, sends access at random according to the said special-purpose rollback time and asks.
2. the method for claim 1 is characterized in that:
The rollback time that the said basic rollback time adopts when initiating again to insert at random for Human To Human's communication (H2H) terminal, or be a rollback time constant;
The said basic rollback time is the rollback that adopts of said H2H terminal during the time, sends to said ME by said network side; The said basic rollback time is pre-configured among the said ME, or sends to said ME by said network side when being said rollback time constant.
3. method as claimed in claim 2 is characterized in that:
Said network side sends the said rollback time constant and the said adjustment factor through system message or beep-page message to said ME.
4. method as claimed in claim 3 is characterized in that, this method also comprises:
Said network side is to different Machine Type communication (MTC) grouping, service priority or access priorities; Dispose the corresponding adjustment factor; With the corresponding adjustment factor of said different packets, service priority or access priority, send to corresponding M E through said system message or beep-page message.
5. method as claimed in claim 4 is characterized in that, this method also comprises:
Said network side carries the identification information of said grouping, service priority or access priority in said system message or beep-page message, to send to corresponding M E.
6. method as claimed in claim 3 is characterized in that:
Said network side is according to service priority or access priority, divides into groups to different MTC, and the adjustment factor that configuration is corresponding with the said corresponding adjustment factor of dividing into groups, sends to the ME in the said grouping through said system message or beep-page message.
7. accidental access method comprises:
Network side adopts the adjustment factor pair benchmark rollback time to adjust, and obtains the special-purpose rollback time, and the resulting special-purpose rollback time is sent to Machine Type communication terminal (ME);
When said ME initiates to insert at random again, send access at random according to the said special-purpose rollback time and ask.
8. method as claimed in claim 7 is characterized in that:
Said network side is for different Machine Type communication (MTC) grouping, service priority or access priority; Adopt the corresponding adjustment factor; The benchmark rollback time is adjusted; And, send to the ME under said different packets, service priority or the access priority through the special-purpose rollback time that system message or beep-page message will obtain.
9. system that realization inserts at random comprises: base station and Machine Type communication terminal (ME), and said base station comprises information sending module, and said ME comprises the access request module, wherein:
Said information sending module is used for the benchmark rollback time and the adjustment factor are sent to said access request module;
Said access request module; Be used to adopt said adjustment factor pair to receive or the pre-configured said benchmark rollback time is adjusted from said information sending module; Obtain the special-purpose rollback time, when initiating to insert at random again, send access at random according to the said special-purpose rollback time and ask.
10. system as claimed in claim 9 is characterized in that:
The rollback time that the said basic rollback time adopts when initiating again to insert at random for Human To Human's communication (H2H) terminal, or be a rollback time constant;
Said information sending module is sent the said rollback time constant and the said adjustment factor through system message or beep-page message to said access request module.
11. the system that realization inserts at random comprises: base station and Machine Type communication terminal (ME), said base station comprises information sending module, and said ME comprises the access request module, wherein:
Said information sending module is used for adopting the adjustment factor pair benchmark rollback time to adjust, and obtains the special-purpose rollback time, and the said special-purpose rollback time that obtains is sent to said access request module;
Said access request module when being used for initiating again to insert at random, being sent access at random according to the said special-purpose rollback time and is asked.
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| CN201010262540.9A CN102378364B (en) | 2010-08-24 | 2010-08-24 | Random access method and system realizing same |
| PCT/CN2011/077493 WO2012024996A1 (en) | 2010-08-24 | 2011-07-22 | Random access method and system thereof |
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| CN201010262540.9A CN102378364B (en) | 2010-08-24 | 2010-08-24 | Random access method and system realizing same |
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| CN102378364A true CN102378364A (en) | 2012-03-14 |
| CN102378364B CN102378364B (en) | 2014-12-10 |
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| WO (1) | WO2012024996A1 (en) |
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Also Published As
| Publication number | Publication date |
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| CN102378364B (en) | 2014-12-10 |
| WO2012024996A1 (en) | 2012-03-01 |
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