CN105704833A - LTE random access method for intelligent power grid - Google Patents
LTE random access method for intelligent power grid Download PDFInfo
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- CN105704833A CN105704833A CN201610045058.7A CN201610045058A CN105704833A CN 105704833 A CN105704833 A CN 105704833A CN 201610045058 A CN201610045058 A CN 201610045058A CN 105704833 A CN105704833 A CN 105704833A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- 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 provides an LTE random access method for an intelligent power grid, and the method comprises the steps that a user terminal high layer requests for triggering the random access process of a physical layer; a user terminal calculates the transmission power of a random access channel based on the priority of different power businesses; the user terminal selects a precursor random sequence according to the calculates transmission power, and transmits a single precursor sequence in a random access channel resource specified by the user terminal high layer; a base station receives an uplink message, and returns the response information to the user terminal. The method provided by the invention meets the demands of the intelligent power grid for multi-business access, solves a problem of contradiction between limited access resources and the random access demands of a large number of terminals, achieves the different priority access of different power businesses, and guarantees the service quality of the power businesses.
Description
Technical field
The present invention relates to technical field of power system communication, be specifically related to the LTE accidental access method of a kind of smart grid-oriented。
Background technology
Stochastic accessing is the first step that in mobile communication, subscriber equipment has communicated with network after having mapped down-going synchronous by major-minor synchronizing sequence。In LTE system, terminal (UE) first to carry out down-going synchronous with base station (eNodeB) before communicating, completes uplink synchronous, i.e. Stochastic accessing on this basis further。Random access procedure is to ensure that the decisive link of connection setup, is also the key factor affecting Consumer's Experience and systematic function, it is therefore necessary to the random access procedure of LTE system is carried out labor。
And power information perception collection has the features such as acquisition range is wide, type of service is many, information gathering point is many, in the face of the contradiction between limited access-in resource and the Stochastic accessing demand of magnanimity terminal, how to solve the access problem of magnanimity business, it is by the prerequisite of business data transmission, is also the problem of power industry application LTE network technology needs solution。Existing Utilities Electric Co. has also built 4G bench-scale testing network, but scale is less, access node is few, but without facing the problem that magnanimity accesses, but future, along with deepening continuously of intelligent grid development and constantly expanding of network size, coverage rate is increasingly wider, must face the demand that magnanimity terminal accesses。
ICT is to realize that electrical network is intelligent, interactive and bulk power grid runs the important foundation controlled。LTE technology has bandwidth flexible configuration, peak rate is higher, time delay is less, safety more advantages of higher, is widely applied in the world。In LTE system, random access procedure can be divided into the Stochastic accessing based on competition and based on non-competing random access procedure。Competition Stochastic accessing refers to that access-in resource is obtained voluntarily at random by UE, and non-competing Stochastic accessing refers to that the access-in resource of UE is distributed by eNodeB。
The two essential difference is in that initiation Stochastic accessing before UE whether receive the dedicated random access resource from network allocation。Random access procedure based on competition is that UE randomly chooses access-in resource initiation according to the random access parameter of broadcast in cell system message。Therefore different UE is likely to choose identical random access resource, thus can send collision, cause this random access failure。
It is served only for establishing with network based on non-competing random access procedure being connected and however it is necessary that and re-start the UE of uplink synchronous with network, it is probably and is synchronized to other communities (switching) or is resynchronized to current area (uplink loss), now network can pass through RRC connection reconfiguration message or PDCCH order (PhysicalDownlinkControlChannelorder) for UE configuration dedicated random access resource, thus avoiding resource identical with other UE selections for this UE and clashing, improve the success rate of Stochastic accessing。
Summary of the invention
In view of this, the LTE accidental access method of a kind of smart grid-oriented provided by the invention, the method is effectively improved the reliability of smart electric grid system, treatment effeciency and extensibility, solve the contradictory problems between the Stochastic accessing demand of limited access-in resource and magnanimity terminal, and then ensure that connection setup, Consumer's Experience and systematic function。
It is an object of the invention to be achieved through the following technical solutions:
A kind of LTE accidental access method of smart grid-oriented, described method realizes Stochastic accessing according to targeting sequencing allocation strategy in the electric power LTE network different application stage, including Stochastic accessing and the non-competing Stochastic accessing of competition, the accidental access method of the described power-priority that accidental access method is electrically-based traffic packets based on competition；Described method includes:
User terminal high level requests triggers physical layer random access procedure；
User terminal calculates the transmitting power P of RACH based on different power business priorityRT；
User terminal, according to the transmitting power calculated, selects leading random sequence, launches single targeting sequencing in the random access channel resource that user terminal high level is specified；
Base station receives upstream message, and returns response message extremely described user terminal。
Preferably, the transmitting power P of described RACHRTReally cover half type is:
Wherein, PIRFor targeting sequencing Initial Trans, and PIRBefore each random access procedure triggers, it is updated by system message；For the side-play amount based on leading form, andBefore each random access procedure triggers, it is updated by high level configuration；N is targeting sequencing transmission enumerator, and N is set to 1 when random access procedure triggers, and the every transmission primaries of targeting sequencing, N adds 1；PstepFor power lifting step-length, and PstepBefore each random access procedure triggers, it is updated by high level configuration；M is power business attribute, and i is one of service attribute, and the M value of the service attribute that priority is more high is more big, and otherwise M value is more little；Q (i) is the kind of the different concrete business under same service attribute, and j is one of concrete business。
Preferably, described user terminal includes the service terminal of high priority and the service terminal of low priority, and the service terminal power lifting step-length of described high priority is higher than the service terminal power lifting step-length of described low priority；
The power lifting step-length of different business terminal is exponentially distributed。
Preferably, described targeting sequencing allocation strategy includes sequence dynamic allocation scheme and the reserved allocation strategy of sequence；
Preferably, in described sequence dynamic allocation scheme, random access leader sequence is the random access leader sequence based on competition and is managed by base station；
Preferably, random access leader sequence is divided into by the reserved allocation strategy of described sequence the random access leader sequence based on competition and based on non-competing random access leader sequence；
Under the guidance of base station, when the described random access leader sequence based on competition cannot meet access demand, partial service terminal can use described based on non-competing random access leader sequence；
When there is non-competing access demand, it is described based on non-competing random access leader sequence that described partial service terminal exits use。
Preferably, the described electric power LTE network different application stage includes renting LTE public network, rents LTE public network and LTE tests the mixed networking of private network and self-built LTE private network。
Preferably, renting LTE public network described in adopts the mode dynamically dividing targeting sequencing packet to be managed；When power business Stochastic accessing conflicts with the generation competition of public network user Stochastic accessing, preferentially meet public network user Stochastic accessing demand。
Preferably, described in rent LTE public network and LTE and test the mixed networking of private network the Access Control of burst class business is tested in private network at LTE, and LTE tested the targeting sequencing that private network has be grouped, reserved give non-competing random targeting sequencing；
The described LTE of renting public network and LTE test private network will rent participation contention access in LTE public network described in collection period length and non-bursty traffic being placed on, and adopt the mode that dynamically division targeting sequencing is grouped to be managed；When power business Stochastic accessing conflicts with the generation competition of public network user Stochastic accessing, preferentially meet public network user Stochastic accessing demand。
Preferably, self-built LTE private network adopts the reserved method of salary distribution of sequence, adopt the accidental access method of the power-priority of electrically-based traffic packets based on the Stochastic accessing competed, adopt base station directly to distribute the Random Access of targeting sequencing based on non-competing Stochastic accessing。
From above-mentioned technical scheme it can be seen that the invention provides the LTE accidental access method of a kind of smart grid-oriented, user terminal high level requests triggers physical layer random access procedure；User terminal calculates the transmitting power of RACH based on different power business priority；User terminal, according to the transmitting power calculated, selects leading random sequence, launches single targeting sequencing in the random access channel resource that user terminal high level is specified；Base station receives upstream message, and returns response message to user terminal。The multi service access demand of the method smart grid-oriented that the present invention proposes, solve the contradictory problems between the Stochastic accessing demand of limited access-in resource and magnanimity terminal, the different priorities realizing different power business accesses, and then ensure that power business service quality。
With immediate prior art ratio, technical scheme provided by the invention has following excellent effect:
1, technical scheme provided by the present invention take into account the different access priority demands between electric power abundant business, solve the contradictory problems between the Stochastic accessing demand of limited access-in resource and magnanimity terminal, the different priorities realizing different power business accesses, namely the priority access of high priority, and then ensure that power business service quality。
2, the present invention proposes two kinds of targeting sequencing allocation strategies towards power industry application。It is that sequence dynamically distributes distribution reserved with sequence respectively。Sequence is reserved distribution and has been ensured the promptness of non-competing access, and need not participate in competition, reduces mutual expense, and sequence is dynamically distributed more flexible, improves the utilization rate of targeting sequencing。
3, technical scheme provided by the invention, is widely used, and has significant Social benefit and economic benefit。
Accompanying drawing explanation
Fig. 1 is the flow chart of the LTE accidental access method of a kind of smart grid-oriented of the present invention；
The targeting sequencing that Fig. 2 is in the concrete application examples of the present invention dynamically distributes schematic diagram；
Fig. 3 is the reserved distribution schematic diagram of the targeting sequencing in the concrete application examples of the present invention；
Fig. 4 is the random access procedure schematic diagram based on competition in the concrete application examples of the present invention；
Fig. 5 be in the concrete application examples of the present invention based on non-competing random access procedure schematic diagram。
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments。Based on embodiments of the invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention。
As shown in Figure 1, the present invention provides the LTE accidental access method of a kind of smart grid-oriented, method realizes Stochastic accessing according to targeting sequencing allocation strategy in the electric power LTE network different application stage, including Stochastic accessing and the non-competing Stochastic accessing of competition, based on the accidental access method of the power-priority that accidental access method is electrically-based traffic packets of competition；Including:
User terminal high level requests triggers physical layer random access procedure；
User terminal calculates the transmitting power P of RACH based on different power business priorityRT；
User terminal, according to the transmitting power calculated, selects leading random sequence, launches single targeting sequencing in the random access channel resource that user terminal high level is specified；
Base station receives upstream message, and returns response message to user terminal。
Wherein, the transmitting power P of RACHRTReally cover half type is:
Wherein, PIRFor targeting sequencing Initial Trans, and PIRBefore each random access procedure triggers, it is updated by system message；For the side-play amount based on leading form, andBefore each random access procedure triggers, it is updated by high level configuration；N is targeting sequencing transmission enumerator, and N is set to 1 when random access procedure triggers, and the every transmission primaries of targeting sequencing, N adds 1；PstepFor power lifting step-length, and PstepBefore each random access procedure triggers, it is updated by high level configuration；M is power business attribute, and i is one of service attribute, and the M value of the service attribute that priority is more high is more big, and otherwise M value is more little；Q (i) is the kind of the different concrete business under same service attribute, and j is one of concrete business。
Wherein, user terminal includes the service terminal of high priority and the service terminal of low priority, and the service terminal power lifting step-length of high priority is higher than the service terminal power lifting step-length of low priority；
The power lifting step-length of different business terminal is exponentially distributed。
Wherein, targeting sequencing allocation strategy includes sequence dynamic allocation scheme and the reserved allocation strategy of sequence；
Wherein, in sequence dynamic allocation scheme, random access leader sequence is the random access leader sequence based on competition and is managed by base station；
Wherein, random access leader sequence is divided into by the reserved allocation strategy of sequence the random access leader sequence based on competition and based on non-competing random access leader sequence；
Under the guidance of base station, when the described random access leader sequence based on competition cannot meet access demand, partial service terminal can use described based on non-competing random access leader sequence；
When there is non-competing access demand, it is described based on non-competing random access leader sequence that described partial service terminal exits use。
Wherein, the electric power LTE network different application stage includes renting LTE public network, rents LTE public network and LTE tests the mixed networking of private network and self-built LTE private network。
Wherein, renting LTE public network adopts the mode dynamically dividing targeting sequencing packet to be managed；When power business Stochastic accessing conflicts with the generation competition of public network user Stochastic accessing, preferentially meet public network user Stochastic accessing demand。
Wherein, rent LTE public network and LTE tests the mixed networking of private network by the Access Control of burst class business in LTE test private network, and the targeting sequencing that LTE test private network is had is grouped, and reserves and gives non-competing random targeting sequencing；
Rent LTE public network and collection period length and non-bursty traffic will be placed on and rent participation contention access in LTE public network by LTE test private network, and adopt the mode that dynamically division targeting sequencing is grouped to be managed；When power business Stochastic accessing conflicts with the generation competition of public network user Stochastic accessing, preferentially meet public network user Stochastic accessing demand。
Wherein, self-built LTE private network adopts the reserved method of salary distribution of sequence, adopt the accidental access method of the power-priority of electrically-based traffic packets based on the Stochastic accessing competed, adopt base station directly to distribute the Random Access of targeting sequencing based on non-competing Stochastic accessing。
The present invention provides the concrete application examples of the LTE accidental access method of a kind of smart grid-oriented, as follows:
Development trend from electric power wireless communication networks, considering the factors such as construction cost, construction period, policy support, experience is rented LTE public network, is rented LTE public network and the developmental stage of LTE test private network mixed networking, self-built LTE private network by LTE network application in power industry。Different stages of development, system can resource different, management means is different, so, the present invention is directed to different developmental stage and propose different Stochastic accessing strategies。
Stage 1: rent LTE public network
In the LTE network early stage of development, network size is little, industrial policy is strong not enough to the application support of trade Special Network, and needs checking LTE network that the enabling capabilities of power business could consider to build the feasibility of private network, so the mobile network that the early stage of development is to rent public network。
Specified about the agreement of random access procedure by 3GPP, each community can targeting sequencing be 64, and public network serves primarily in the business such as the voice of public network own user, data communication, cause power industry can targeting sequencing just less, the probability of conflict is bigger, it is therefore desirable to more scientific Stochastic accessing management。For reducing the interference to public network user, also comply with the management strategy of operator simultaneously, the mode dynamically dividing targeting sequencing packet can be adopted to be managed, when public network Stochastic accessing is many, preferentially meet the access demand of public network user, when accessing idle, electric power terminal initiates random access request and use。Because power business is periodically to gather (power information collection, equipment condition monitoring etc.), one day transmission primaries of partial service, so, as long as meeting collection period demand, under normal circumstances, the network of operator is more idle at night, and power business terminal can initiate access request in this time period。
Stage 2: public network and private network mixed networking
Along with LTE network technical development to certain phase and national policy supporting dynamics start to strengthen, every profession and trade will be built small-scale LTE and be tested private network, and power industry is no exception。Existence due to private network, it is possible to alleviate and public network competes the pressure using random access resource, compare and rent the mode of public network, it is possible to meet more Stochastic accessing demand, it is possible to meet the access demand at any time of partial service。
Specific strategy, angle from resource utilization and management convenience, preferential use private network resource, ensure making full use of of private network resource, meanwhile, also control to be incorporated in private network by the access of burst class business, the targeting sequencing that private network is had is grouped, reserved non-competing targeting sequencing, can ensure the promptness of access, meets the demand that burst accesses；Collection period length, the burst less demanding business of access will be placed in public network and participate in contention access, cut-in method strategy in the stage 1, can alleviate the cut-in pressure of private network simultaneously。
Stage 3: self-built LTE private network
When LTE Technical comparing is ripe, and when national policy is supported energetically, self-built LTE private network becomes the necessary choice of sector application。From fairness angle, different business should have identical access chance, but due to the particularity of power business, different business has different access priority requirements, namely needs divided rank。For different priorities, the present invention proposes the LTE private network random access algorithm suitable in smart grid-oriented。
Specifying according to 3GPP related protocol, there are 64 available targeting sequencings each community, and these sequences are segmented into two parts, and a part is for the Stochastic accessing based on competition, and another part is for based on non-competing Stochastic accessing。UE to be successfully transmitted targeting sequencing, it is necessary to: 1) select targeting sequencing number；2) Physical Random Access Channel (PRACH) resource for sending sequence is selected；3) RA-RNTI (mark of base station transmission accidental access response) of correspondence is determined；4) target received power is determined。
For improving targeting sequencing utilization rate, the present invention proposes two kinds of targeting sequencing allocation strategies towards power industry application。The first is that sequence is dynamically distributed, as shown in Figure 2。Whole sequence does not reserve non-competing random access sequence, when there is non-competing Stochastic accessing demand, according to base station, the priority of terminal is judged the sequence used inside sequence set, namely in this kind of situation, regardless of competition and non-competing random access sequence, the access of all terminals is all that competition uses, it is managed by base station, whole sequence is dynamically change relative to fixed allocation mode, simply the terminal of higher priority can more preferably access, this pattern improves the utilization rate of targeting sequencing, but also can affect the operational sustainability of low priority；Another kind is the reserved distribution of sequence, namely divides the random access sequence of part competition, remaining for non-competing random access sequence, as shown in Figure 3。Simultaneously, in order to improve targeting sequencing utilization rate, can share and use non-competing random sequence, because for power business, bursty data situation is less, if idle non-competing sequence can cause the waste of resource always, so when the sequence of competition meets access demand not, under the guidance of base station, can temporarily use non-competing sequence, when non-competing access demand occurs, exit use in time, the main distinction of two kinds of methods is whether fixing reserved non-competing sequence, second method has ensured the promptness of non-competing access, and competition need not be participated in, reduce mutual expense, and first method is more flexible, improve the utilization rate of targeting sequencing。
Owing to non-competing access lead sequence is directly distributed by base station, access fairly simple。Regardless of whether which kind of method of salary distribution, it is required for solving the problem of contention access, present invention is generally directed to the problem of contention access and propose relevant programme。
UE to send targeting sequencing, it is necessary to determines target received power, and by 3GPP related protocol, its computing formula is as follows:
Actual emission power formula:
PPRACH=min{Pmax, PRT+PL}(2)
P in formulaIRFor targeting sequencing Initial Trans, this parameter, before each random access procedure triggers, can be updated by system message。For the side-play amount based on leading form, this parameter, before each random access procedure triggers, can be passed through high level configuration and be updated。N is targeting sequencing transmission enumerator, and this parameter is set to 1 when random access procedure triggers, and the every transmission primaries of targeting sequencing, this parameter adds 1。PstepFor power lifting step-length, this parameter, before each random access procedure triggers, can be passed through high level configuration and be updated。PLBeing based on the UE estimation for downlink, obtained open loop path loss compensates。
Document is had to propose the Stochastic accessing of packet, and utilize the thought of packet to carry out controlling based on the Stochastic accessing of power-priority, its main thought is that the user that priority is more high increases more big power, but this algorithm does not account for the limiting factor of the maximum transmission power of terminal, when ever-increasing power reaches the maximum transmission power of terminal, the transmitting power of terminal is all consistent, namely cannot distinguish priority。
The present invention is on this basis, carry out algorithm improvement, first the different business attribute (mainly voice, data, three kinds of service attributes of video) according to electric power is grouped, same service attribute is divided into same priority, and the concrete service access grade in the service attribute of same priority accesses requirement according to reality and divides。(being the priority of differentiated service attribute and concrete business here, distinguish with priority and access grade respectively)
Be can be seen that by formula (1), one of influence factor of transmitting power is power lifting step-length, the algorithm idea of the present invention is the service power lifting step-length allowing the service power lifting step-length of high priority be higher than low priority, the power lifting step-length of different business is exponentially distributed, the power lifting step-length of the concrete service access grade in same priority service attribute is also exponentially distributed lifting, thus can distinguish the access order of different priorities。The transmitting power computing formula of service terminal is as follows:
Formula is made up of 4 parts, the same formula of the meaning (1) of front 2 parts, the purpose of Part III is to discriminate between the power lifting step-length of different business attribute priority, the power lifting step-length that the purpose of Part IV is to discriminate between in same service attribute priority different business and accesses。
M in formula represents power business attribute, i represents one of service attribute, and the service attribute M value that priority is more high is more big, otherwise more little, from formula, the service attribute power lifting step-length that priority is more high is more big, and the power lifting step-length of different business attribute is exponentially distributed, and its objective is, the amplitude that the transmitting power that priority is more high adjusts is more big, more being conducive to being detected by base station as early as possible, and the more little adjustment amplitude of priority is more little, the time being detected is more a little later。
In formula, Q (i) represents under same service attribute, and the kind of different concrete business, j represents one of concrete business。The business in same service attribute can be made can also to have different access grade management by the setting of this part。
The random access algorithm that the present invention proposes take into account the different access priority demands between electric power abundant business, by the algorithm of the present invention, the service terminal of high priority will preferentially be detected by base station, namely priority access, and the service terminal power lifting step-length of low priority reduces amplitude, later it is detected。As can be seen here, the algorithm that the present invention proposes more adapts to the application of electric power scene, has that calculating is simple, use the advantages such as flexible。
The present invention proposes two kinds of targeting sequencing allocation strategies towards power industry application。The first is that sequence is dynamically distributed, whole sequence does not reserve non-competing random access sequence, the access of all terminals is all that competition uses, it is managed by base station, whole sequence is dynamically change relative to fixed allocation mode, simply the terminal of higher priority can more preferably access, and this pattern improves the utilization rate of targeting sequencing；Another kind is the reserved distribution of sequence, divides the random access sequence of part competition, remaining for non-competing random access sequence。Simultaneously, in order to improve targeting sequencing utilization rate, can share and use non-competing random sequence, when the sequence of competition meets access demand not, under the guidance of base station, can temporarily use non-competing sequence, when non-competing access demand occurs, exiting use in time, the main distinction of two kinds of methods is whether fixing reserved non-competing sequence, application scenarios is had nothing in common with each other, second method has ensured the promptness of non-competing access, and need not participate in competition, reduces mutual expense, and first method is more flexible, improve the utilization rate of targeting sequencing。
Wherein, the complete procedure of Stochastic accessing is as follows:
When terminal allows to initiate connection establishment, first pass through Stochastic accessing and obtain uplink synchronous and uplink channel resources。UE obtains the physical layer resources carrying out Stochastic accessing and the targeting sequencing set distributed from system broadcast information, then generates random access leader sequence, and initiates the Stochastic accessing based on competition on the physical layer random access resource of configuration。Random access procedure based on competition is divided into following 4 steps, as shown in Figure 4。
Step 1:UE randomly chooses a targeting sequencing, sends on prach。
UE to be successfully transmitted preamble, it is necessary to: 1) select preambleindex；2) the PRACH resource for sending preamble is selected；3) RA-RNTI of correspondence is determined；4) target received power PREAMBLE_RECEIVED_TARGET_POWER is determined。
Step 2:eNB is after detection has targeting sequencing, accidental access response is sent to UE, response includes following information: the sequence number of the targeting sequencing received, time adjustment amount, random access radio network temporary mark (RandomAccessRadioNetworkTemporaryIdentifier, RA-RNTI) etc. for terminal distribution。
The step 3:UE instruction according to eNB, sends upstream message on the ascending resource of distribution, and this message is different according to the triggering reason difference of Stochastic accessing。
Step 4:eNB receives the upstream message of UE, and returns contention resolved message to the UE being successfully accessed, and this message directly replicates and is successfully accessed the UE message3 message sent。
It is divided into following 3 steps, as shown in Figure 5 based on non-competing random access procedure。
Step 1:eNB distributes to mono-non-competing random access leader sequence of UE, and this targeting sequencing is not broadcasted in system message；
Step 2:UE sends the random access leader sequence of distribution to eNB；
Step 3:eNB sends accidental access response, represents Stochastic accessing success。
Above example is only in order to illustrate that technical scheme is not intended to limit; although the present invention being described in detail with reference to above-described embodiment; the specific embodiment of the present invention still can be modified or equivalent replacement by those of ordinary skill in the field; and these without departing from any amendment of spirit and scope of the invention or equivalent are replaced, within the claims of its present invention all awaited the reply in application。
Claims (10)
1. the LTE accidental access method of a smart grid-oriented, it is characterized in that, described method realizes Stochastic accessing according to targeting sequencing allocation strategy in the electric power LTE network different application stage, including Stochastic accessing and the non-competing Stochastic accessing of competition, the accidental access method of the described power-priority that accidental access method is electrically-based traffic packets based on competition；Described method includes:
User terminal high level requests triggers physical layer random access procedure；
User terminal calculates the transmitting power P of RACH based on different power business priorityRT；
User terminal, according to the transmitting power calculated, selects leading random sequence, launches single targeting sequencing in the random access channel resource that user terminal high level is specified；
Base station receives upstream message, and returns response message extremely described user terminal。
2. the method for claim 1, it is characterised in that the transmitting power P of described RACHRTReally cover half type is:
Wherein, PIRFor targeting sequencing Initial Trans, and PIRBefore each random access procedure triggers, it is updated by system message；For the side-play amount based on leading form, andBefore each random access procedure triggers, it is updated by high level configuration；N is targeting sequencing transmission enumerator, and N is set to 1 when random access procedure triggers, and the every transmission primaries of targeting sequencing, N adds 1；PstepFor power lifting step-length, and PstepBefore each random access procedure triggers, it is updated by high level configuration；M is power business attribute, and i is one of service attribute, and the M value of the service attribute that priority is more high is more big, and otherwise M value is more little；Q (i) is the kind of the different concrete business under same service attribute, and j is one of concrete business。
3. the method for claim 1, it is characterized in that, described user terminal includes the service terminal of high priority and the service terminal of low priority, and the service terminal power lifting step-length of described high priority is higher than the service terminal power lifting step-length of described low priority；
The power lifting step-length of different business terminal is exponentially distributed。
4. the method for claim 1, it is characterised in that described targeting sequencing allocation strategy includes sequence dynamic allocation scheme and the reserved allocation strategy of sequence。
5. method as claimed in claim 4, it is characterised in that in described sequence dynamic allocation scheme, random access leader sequence is the random access leader sequence based on competition and is managed by base station。
6. method as claimed in claim 4, it is characterised in that in the reserved allocation strategy of described sequence, random access leader sequence is divided into the random access leader sequence based on competition and based on non-competing random access leader sequence；
Under the guidance of base station, when the described random access leader sequence based on competition cannot meet access demand, partial service terminal can use described based on non-competing random access leader sequence；
When there is non-competing access demand, it is described based on non-competing random access leader sequence that described partial service terminal exits use。
7. the method for claim 1, it is characterised in that the described electric power LTE network different application stage includes renting LTE public network, rent LTE public network and LTE tests the mixed networking of private network and self-built LTE private network。
8. method as claimed in claim 7, it is characterised in that described in rent LTE public network and adopt the mode dynamically dividing targeting sequencing packet to be managed；When power business Stochastic accessing conflicts with the generation competition of public network user Stochastic accessing, preferentially meet public network user Stochastic accessing demand。
9. method as claimed in claim 7, it is characterized in that, the Access Control of burst class business is tested in private network by the described mixed networking renting LTE public network and LTE test private network at LTE, and the targeting sequencing that LTE test private network is had is grouped, and reserves and gives non-competing random targeting sequencing；
The described LTE of renting public network and LTE test private network will rent participation contention access in LTE public network described in collection period length and non-bursty traffic being placed on, and adopt the mode that dynamically division targeting sequencing is grouped to be managed；When power business Stochastic accessing conflicts with the generation competition of public network user Stochastic accessing, preferentially meet public network user Stochastic accessing demand。
10. method as claimed in claim 7, it is characterized in that, self-built LTE private network adopts the reserved method of salary distribution of sequence, adopt the accidental access method of the power-priority of electrically-based traffic packets based on the Stochastic accessing competed, adopt base station directly to distribute the Random Access of targeting sequencing based on non-competing Stochastic accessing。
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