CN101990311A - virtual lead code based random access method of wireless mobile broadband system - Google Patents
virtual lead code based random access method of wireless mobile broadband system Download PDFInfo
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Abstract
The invention relates to a virtual lead code based random access method of a wireless mobile broadband system. The method comprises the following steps: a base station sets a front lead code virtual resource tank and selects a lead code for a UE (User Equipment) meeting a non-competitive random access scene from a dedicated lead code package or a virtual resource tank; the UE transmits the distributed lead code to the base station in a corresponding random access channel; the base station judges whether the received lead code belongs to the virtual resource tank or not, if so, the corresponding time frequency resource information is distributed for the UE preferentially, and otherwise, ordinary random access flow is used for completing the random access; and the UE distributed with the virtual lead code finishes the random access process by the non-competitive random access flow according to the distributed time frequency resource information. The invention has simple and reliable method, does not need to physically change the base station or change the LTE (Long-Term Evolution) protocol, overcomes the shortage of the traditional non-competitive random access method, improves the random access success rate of the UE and reduces the random access time delay of the UE.
Description
Technical field
The present invention relates to a kind of accidental access method of wireless mobile broadband system, be specifically related to the accidental access method of a kind of wireless mobile broadband system, belong to the radio mobile communication field based on virtual lead code.
Background technology
Random access procedure is an important technology of medium access control in the communication system, be LTE (Long Term Evolution, Long Term Evolution, be the evolution of 3G, start from the Toronto meeting of 3GPP in 2004) important step in the system, refer in particular to subscriber equipment (UE, User Equipment, the communication terminal device that has the communications field of input, output function as mobile phone, ipod, data card etc.) and the access procedure between the network service, the up timing that is mainly used in the user is adjusted and the application of user's scheduling resource synchronously.By inserting at random, UE can obtain uplink synchronous, and obtains the scheduling initial resource, is used to send up signaling and upstream data.
Latest edition definition according to existing LTE agreement, access can be divided into the access at random of inserting at random of competitive mode and non-competing pattern at random, whether the main distinction of the two need is competition to solve message, the access at random that also is competitive mode need send competition solution message, and the access at random of non-competing pattern does not need to send competition and solves message.
The access at random of non-competing pattern is mainly used in following scene: when scene one, up asynchronous regime, UE is in connection status, and downlink data arrives the access of initiating at random; Scene two, the access at random in the handoff procedure.So-called up, refer to from UE to the base station eNB communication of (Evolved NodeBase station, evolved base station, corresponding) direction with user UE.So-called asynchronous, promptly base station eNB and UE do not keep acting in agreement.Can calculate the time constantly according to the U.S. as base station eNB in the U.S., UE in China can calculate constantly according to China's time, if do not appoint with which country time to be to arrange the reference time at 10 to see on the net, then base station eNB is according to 10 points of U.S.'s time, UE is according to 10 points of China's time, and promptly maintenance does not act in agreement and can't see on the net.This situation of acting in agreement of not reaching is exactly a step-out.So-called downlink data reaches, and is exactly that base station eNB has data will send to UE.So-called downlink data arrives initiates, and refers to that base station eNB has data to send, and the base station eNB trigger data sends action.
The random access procedure of existing non-competing pattern comprises as shown in Figure 2:
In this step, according to existing LTE agreement regulation, the operable random access lead code quantity in each sub-district is at most 64, is divided into non-proprietary lead code grouping and the grouping of proprietary lead code according to inserting the purpose difference, as shown in Figure 3; Non-proprietary lead code is used for the access at random of competitive mode, and proprietary lead code is used for the access at random of non-competing pattern.Wherein the operable random access lead code index of the access at random of competitive mode can be broadcasted by cell broadcast messages, the proprietary lead code of using that inserts at random of non-competing pattern is distributed to UE by eNB, UE sends lead code according to the Initial Trans of protocol definition in corresponding Random Access Channel.
In this step, the lead code that UE uses is the proprietary random access lead code that base station eNB is distributed, thereby different UE sends different random access lead codes and can not bump.
After step 103, base station eNB detect proprietary lead code in the Random Access Channel, promptly construct accidental access response (RAR, RandomAccess Response) information and sending and give UE.
After base station eNB is obtained random access lead code, according to different random access lead codes, insert running time-frequency resource at random for the UE of this random access lead code correspondence distributes, the running time-frequency resource of access at random that different UE distributes is also different.
Accidental access response message comprises: random access lead code sign, time shift to an earlier date message, initial uplink mandate and the interim Cell Radio Network Temporary Identifier/Identity, Cell-RNTI that distributes (T-C-RNTI, Temporary-Cell-RNTI).Can comprise the response of the random access lead code that a plurality of UE are sent in the accidental access response message.
So far, this non-competing access process at random finishes.
This shows, existing non-competing access process at random, different UE has distributed different random access lead codes, even insert at random in identical Random Access Channel request, because the orthogonality between the lead code, base station eNB can correctly be distinguished UE at different lead codes, and return accidental access response message to UE, UE sends out message respectively on the running time-frequency resource of access at random that is distributed separately then, owing to insert the difference of running time-frequency resource at random, the message that different UE sends can not clash collision each other, and base station eNB can correctly receive the message of the different UE of also demodulation, and then completes successfully the process that inserts at random.
Yet above-mentioned prior art has the following disadvantages.
For some scenes, during such as scale user switching or downlink data arrival, proprietary lead code is because limited amount, can not satisfy scale user's proprietary lead code and distribute, and then cause certain customers to initiate the access at random of competitive mode rather than the access at random of non-competing pattern, and the scale user initiates competition access at random simultaneously, to inevitably bump, cause the access success rate at random of UE lower, increase the UE access delay simultaneously, and then influence the UE quality of service.
This shows that on the one hand, random access lead code only is divided into proprietary and non-proprietary two classes, is lacking flexibility in the scene as described above, causes proprietary lead code limited; On the other hand, the access process at random that originally can carry out non-competing pattern is changed over to the access at random of competitive mode by force, can not make full use of the information of UE, can reduce the access success rate, increase access delay at net.
Summary of the invention
The purpose of this invention is to provide the accidental access method of a kind of wireless mobile broadband system, to overcome the deficiencies in the prior art based on virtual lead code.
From above-mentioned analysis as can be known the LTE system, clear and definite regulation the random access lead code quantity used at most of sub-district be 64, thereby under the situation of not changing existing LTE agreement, can not improve by the mode of rigid increase random access lead code quantity and insert success rate at random.Simultaneously, in the non-competing access module at random of existing LTE agreement regulation, when proprietary lead code is resource-constrained, there is not the optimization of consideration to nonrandom competition, but directly force to enter to compete access process at random, do not make full use of UE in the net information resources, increase the probability of random access collision and access delay at random.
The present invention has solved the technical problem of above-mentioned several respects by the mode in lead code virtual resource pond is set in non-proprietary lead code grouping.
In the present invention, the lead code that is used for inserting at random can be divided into non-proprietary lead code grouping, proprietary lead code grouping, and the virtual lead code that comes from the virtual resource pond that the present invention proposes is divided into groups the quantity of the proprietary lead code that the soft increase in lead code virtual resource pond inserts at random.By the lead code virtual resource pond of eNB is set, when proprietary lead code is limited, base station eNB is selected virtual lead code and sends to the UE that satisfies non-competing access to be used for inserting at random at random from lead code virtual resource pond, UE sends this lead code in Random Access Channel, base station eNB receives and judges that this lead code belongs to lead code virtual resource pond, then insert running time-frequency resource at random for the UE priority allocation of this lead code correspondence, UE is according to accidental access response information, finish non-competing access process at random, base station eNB according to existing UE in net information, no matter whether lead code bumps, all be that described UE returns accidental access response message, improve the access success rate of such UE, reduced the access delay that such UE inserts at random simultaneously.
Described lead code virtual resource pond, be on the basis of non-proprietary lead code grouping, the dynamic as required virtual proprietary lead code of a part of resource composition of temporarily using from non-proprietary lead code grouping is divided into groups, and is used for non-competing access process at random and uses.
Wireless mobile broadband system of the present invention is characterized in that based on the accidental access method of virtual lead code this method may further comprise the steps:
Step 1: base station eNB is provided with lead code virtual resource pond;
Step 2: base station eNB is judged the access purpose of UE, and selects lead code for satisfying the non-competing UE that inserts purpose at random from proprietary lead code grouping or lead code virtual resource pond;
Step 3: described UE uses the proprietary lead code grouping of base station eNB distribution or the lead code in the virtual resource pond, is sending this lead code to base station eNB in corresponding Random Access Channel;
Step 4: base station eNB receives and the described preamble information of demodulation, judges whether the above-mentioned lead code that inserts at random belongs to the lead code in the virtual resource pond, if be preferably this UE and distribute corresponding running time-frequency resource information as accidental access response message; If not, adopt common access process at random to finish at random and insert;
Step 5: the described UE that is assigned to virtual lead code finishes random access procedure according to the information in the accidental access response message of step 4 according to non-competing access process at random, thereby realizes inserting at random based on the non-competing of virtual lead code.
In the above-mentioned steps 1, base station eNB is provided with lead code virtual resource pond and comprises:
Base station eNB is on the basis of its existing non-proprietary lead code grouping, and partly or entirely non-proprietary lead code is set to lead code virtual resource pond.
It is the ratio of determining to be provided with lead code virtual resource pond according to the load condition of base station eNB that the non-proprietary lead code of above-mentioned base station eNB part is set to lead code virtual resource pond, base station eNB load 10%～30% o'clock, the ratio of virtual lead code and other non-proprietary lead codes is set to 1: 2～between 1: 3; The base station eNB load surpasses at 30% o'clock, and this ratio is set to 1: 4～between 1: 5.
In the above-mentioned steps 2, in satisfying the non-competing UE that inserts purpose at random, the scale user is switched or downlink data arrives if the access scene of this UE satisfies, and the proprietary lead code of base station eNB is limited, then base station eNB selects a lead code to distribute to described UE from lead code virtual resource pond at random, initiate non-competing access at random, otherwise base station eNB is that this UE selects lead code, initiates non-competing access at random from proprietary lead code grouping; If described UE inserts the strategy that purpose does not satisfy non-competing access at random, then handle according to competing at random access process.
Because UE non-competing and the competition purpose exists simultaneously in random access procedure, in the above-mentioned steps 4, base station eNB receives and the described preamble information of demodulation, the non-competing access at random that no matter is assigned to the UE transmission of the lead code in the virtual resource pond selects the competition of this lead code whether to insert collision conflict at random with other, and base station eNB is preferably virtual resource pond lead code and distributes running time-frequency resource.
Base station eNB receives and the described preamble information of demodulation, when collision conflict, can solve in the following manner: when base station eNB is filled in uplink authorization information, the bandwidth of only distributing a buffer status report, thereby make access process at random based on non-competing pattern, further apply for scheduling resource by buffer status report, and based on the access process at random of competitive mode, owing to stopping this with transmission MSG3 message, the inadequate resource that distributes inserts at random, but to protect the non-competing success that inserts at random.
And, when collision conflict, have following situation:
Scene when switching for the scale user, base station eNB be according to by the network planning with optimize switching the setting of band and switching point, and the time that calculates the UE of this place sends in advance value and fills in the value that shifts to an earlier date of initiating non-competing access at random when switching; Value in advance when perhaps base station eNB networks at this place according to the UE of historical record is filled in and is initiated the non-competing value in advance that inserts at random when switching, to realize uplink synchronous.
During for the scene of up asynchronous regime, UE is in connection status, and downlink data arrives the access scene of initiating at random, and base station eNB is filled in the value in advance that the UE of historical record uses, to realize uplink synchronous.Promptly value is in order to realize uplink synchronous by introducing in advance.
Because just use dynamically to non-proprietary lead code grouping in virtual lead code virtual resource pond, so based on virtual lead code non-competing insert at random finish after, or the lead code that will be labeled as behind this non-competing access failure at random in the virtual resource pond discharges, to reduce the characteristic of its non-proprietary lead code.
The simple and reliable easy row of the inventive method, not needing that by the mode that lead code virtual resource pond is set base station eNB is carried out physics changes, do not need to change widely used existing LTE agreement yet, solved the deficiency of at present existing non-competing accidental access method, and then realized comprising non-competing purpose and the whole improvement of the accidental access method of competition purpose, improve the access success rate at random of user UE, reduced the access delay at random of user UE.
As seen from the above technical solutions, accidental access method in the LTE provided by the invention system based on virtual lead code, base station eNB judges whether the lead code of being received belongs to the virtual resource pond, if insert running time-frequency resource accordingly at random for described UE distributes and sends to UE; When if collision conflict, base station eNB are filled in UL Grant information, only distribute the bandwidth of a BSR size to guarantee the non-competing success that inserts at random.Like this, under the prerequisite that does not change current LTE protocol specification, thereby can reduce the access delay at random of such UE significantly and improve its access success rate, to access success rate at random and the not influence of access delay of other UE.
Description of drawings
Fig. 1 is the schematic flow sheet of accidental access method of the present invention.
Fig. 2 is the figure of the access process at random schematic diagram of existing non-competing pattern.
Fig. 3 is existing lead code grouping scheme schematic diagram.
Fig. 4 is a lead code virtual resource of the present invention pond grouping scheme schematic diagram.
Fig. 5 is the at random access process schematic diagram based on virtual lead code of the present invention under the LTE agreement.
Wherein, 1, the grouping of non-proprietary lead code, 2, the grouping of proprietary lead code, 3, lead code virtual resource pond.
Embodiment
As shown in Figure 5, based on before access begins at random of virtual lead code, base station eNB is according to the configuring condition of non-proprietary lead code and proprietary lead code, in non-proprietary lead code grouping, lead code virtual resource pond is set, and corresponding strategy, promptly non-competingly insert purpose at random, insert scene and be the scale user is switched or downlink data arrives UE for meeting to satisfy, and when the proprietary lead code of base station eNB is limited, be implemented under the prerequisite that needn't change existing LTE agreement, to the at random access of this UE employing based on virtual lead code.
As shown in Figure 1, wireless mobile broadband system of the present invention is characterized in that based on the accidental access method of virtual lead code this method may further comprise the steps:
Step 1: base station eNB is provided with lead code virtual resource pond; As shown in Figure 4, be that base station eNB is on the basis of its existing non-proprietary lead code grouping, partly or entirely non-proprietary lead code is set to lead code virtual resource pond, can determine to be provided with the ratio in lead code virtual resource pond according to the load condition of base station eNB, base station eNB load 10%～30% o'clock, the ratio of virtual lead code and other non-proprietary lead codes is set to 1: 2～between 1: 3; The base station eNB load surpasses at 30% o'clock, and this ratio is set to 1: 4～between 1: 5.The load condition and the application scenarios of base station eNB are closely related, and such as the city application scenarios, most of user is resident for a long time, and non-proprietary lead code is provided with ratio can be higher; The littoral scene of railway and for example, the scale user is switched frequently in the train driving, and proprietary lead code grouping is provided with ratio can height.What deserves to be mentioned is, base station eNB even can all be set to lead code virtual resource pond to whole non-proprietary lead code grouping, like this, the access at random to the large-scale consumer handoff scenario will improve a lot and improve.
In the practical application, lead code virtual resource pond can be provided with by emulation or statistical analysis, by the random selection strategy of leading virtual resource pond and virtual resource pond lead code rationally is set, the UE quantity that inserts at random based on lead code virtual resource pond can be controlled in the suitable scope, accomplish promptly not influence the overall performance that system inserts at random, can guarantee such non-competing access success rate that inserts at random again.
Step 2: base station eNB is judged the access purpose of UE, and selects lead code for satisfying the non-competing UE that inserts purpose at random from proprietary lead code grouping or lead code virtual resource pond; In satisfying the non-competing UE that inserts purpose at random, the scale user is switched or downlink data arrives if the access scene of this UE satisfies, and the proprietary lead code of base station eNB is limited, then base station eNB selects a lead code to distribute to described UE from lead code virtual resource pond at random, initiate non-competing access at random, otherwise base station eNB for this UE selects lead code, is initiated non-competing access at random from proprietary lead code grouping; If described UE inserts the strategy that purpose does not satisfy non-competing access at random, then handle according to competing at random access process.
This shows that UE satisfies the non-competing purpose that inserts at random, the access scene of UE satisfies scale user switching or downlink data arrives, and the proprietary lead code of base station eNB is limited, is to constitute the precondition of using virtual lead code.About wireless mobile broadband system, one has five kinds inserts scene at random, will be assigned to proprietary lead code and carry out non-competing access for the UE that satisfies other three kinds of scenes.
Especially working as the scale mobile subscriber switches, when proprietary lead code is limited, the business datum QOS that described UE need transmit (Quality ofService, service quality, a kind of security mechanism of network) delay requirement is higher, be that described UE selects random access lead code from lead code virtual resource pond, allow such UE initiate non-competing access process at random, can improve it significantly and insert success rate and reduce its access delay.
Step 3: described UE uses the proprietary lead code grouping of base station eNB distribution or the lead code in the virtual resource pond, is sending this lead code to base station eNB in corresponding Random Access Channel;
In this step, PDCCH-Order message (the PDCCH control channel order that UE sends by the base station, a signaling of using during switching) or hand off signaling obtain the random access lead code index that base station eNB is distributed, described UE sends in corresponding Random Access Channel according to the Initial Trans of protocol definition.
Step 4: base station eNB receives and the described preamble information of demodulation, judges whether the above-mentioned lead code that inserts at random belongs to the lead code in the virtual resource pond, if be preferably this UE and distribute corresponding running time-frequency resource information as accidental access response message; If not, adopt common access process at random to finish at random and insert.
Because UE non-competing and the competition purpose exists simultaneously in random access procedure, in the above-mentioned steps 4, base station eNB receives and the described preamble information of demodulation, the non-competing access at random that no matter is assigned to the UE transmission of the lead code in the virtual resource pond selects the competition of this lead code whether to insert collision conflict at random with other, and base station eNB is preferably virtual resource pond lead code and distributes running time-frequency resource.
Base station eNB receives and the described preamble information of demodulation, when collision conflict, if according to previous flow process, can be according to access failure processing at random, but behind employing the present invention, can make full use of the base station eNB existing information, perceive the non-competing access at random of such UE initiation and the access at random of other competition collision has taken place, and solve in the following manner: base station eNB is filled in UL Grant (uplink authorization, be exactly the available resources that base station eNB is given UE) during information, only distribute a BSR (Buffer Status Report, buffer status report) bandwidth, thereby make access process at random based on non-competing pattern, further apply for scheduling resource by buffer status report, and based on the access process at random of competitive mode, owing to the inadequate resource that distributes stops this and inserts at random to send MSG3 message, but to protect the non-competing success that inserts at random.Like this, base station eNB can make full use of UE in net information, ignores collision, finishes the access at random of non-competing pattern, improves the successful access rate that such UE inserts at random, reduces the access delay that such UE inserts at random simultaneously.
In the implementation case, send the random access lead code that eNB distributes based on lead code virtual resource pond UE, base station eNB is adjudicated after receiving the MSG message of this UE transmission, and there are following two kinds of situations in the result of judgement:
Scene when switching for the scale user, the base station eNB basis is by the network planning and the setting of optimizing switching band and switching point, the time that calculates the UE of this place sends and initiates non-competing TA (Time Advanced, the lead) value that inserts at random when value is filled in switching in advance; Value in advance when perhaps base station eNB networks at this place according to the UE of historical record is filled in and is initiated the non-competing value in advance that inserts at random when switching, to realize uplink synchronous.
During for the scene of up asynchronous regime, UE is in connection status, and downlink data arrives the access scene of initiating at random, and base station eNB is filled in the value in advance that the UE of historical record uses, to realize uplink synchronous.Described TA value problem belongs to the existing communication technology.
Wherein, base station eNB judges that lead code does not belong to the lead code in the virtual resource pond, being meant adopting common access process at random to finish to insert at random: adopt the existing non-competing access process at random of LTE consensus standard or competition access process respectively and finish at random and insert for the UE that is assigned to proprietary lead code or non-proprietary lead code.
Step 5: the described UE that is assigned to virtual lead code finishes random access procedure according to the information in the accidental access response message of step 4 according to non-competing access process at random, thereby realizes inserting at random based on the non-competing of virtual lead code.
Because just use dynamically to non-proprietary lead code grouping in virtual lead code virtual resource pond, so based on virtual lead code non-competing insert at random finish after, or the lead code that will be labeled as behind this non-competing access failure at random in the virtual resource pond discharges, to reduce the characteristic of its non-proprietary lead code.
Because non-proprietary and proprietary lead code is safeguarded by the MAC layer that all virtual resource of the present invention pond itself is exactly the part of mac-layer protocol stack, does not need to load separately, only need the MAC layer to safeguard according to algorithm voluntarily and get final product.
Claims (10)
1. wireless mobile broadband system is characterized in that based on the accidental access method of virtual lead code this method may further comprise the steps:
Step 1: base station eNB is provided with lead code virtual resource pond;
Step 2: base station eNB is judged the access purpose of UE, and selects lead code for satisfying the non-competing UE that inserts purpose at random from proprietary lead code grouping or lead code virtual resource pond;
Step 3: described UE uses the proprietary lead code grouping of base station eNB distribution or the lead code in the virtual resource pond, is sending this lead code to base station eNB in corresponding Random Access Channel;
Step 4: base station eNB receives and the described preamble information of demodulation, judges whether the above-mentioned lead code that inserts at random belongs to the lead code in the virtual resource pond, if be preferably this UE and distribute corresponding running time-frequency resource information as accidental access response message; If not, adopt common access process at random to finish at random and insert;
Step 5: the described UE that is assigned to virtual lead code finishes random access procedure according to the information in the accidental access response message of step 4 according to non-competing access process at random, thereby realizes inserting at random based on the non-competing of virtual lead code.
2. accidental access method as claimed in claim 1 is characterized in that in the above-mentioned steps 1, and base station eNB is provided with lead code virtual resource pond and comprises:
Base station eNB is on the basis of its existing non-proprietary lead code grouping, and partly or entirely non-proprietary lead code is set to lead code virtual resource pond.
3. accidental access method as claimed in claim 2, it is characterized in that it is the ratio of determining to be provided with lead code virtual resource pond according to the load condition of base station eNB that the non-proprietary lead code of above-mentioned base station eNB part is set to lead code virtual resource pond, base station eNB load 10%～30% o'clock, the ratio of virtual lead code and other non-proprietary lead codes is set to 1: 2～between 1: 3; The base station eNB load surpasses at 30% o'clock, and this ratio is set to 1: 4～between 1: 5.
4. accidental access method as claimed in claim 1, it is characterized in that in the above-mentioned steps 2, in satisfying the non-competing UE that inserts purpose at random, the scale user is switched or downlink data arrives if the access scene of this UE satisfies, and the proprietary lead code of base station eNB is limited, then base station eNB selects a lead code to distribute to described UE from lead code virtual resource pond at random, initiate non-competing access at random, otherwise base station eNB for this UE selects lead code, is initiated non-competing access at random from proprietary lead code grouping; If described UE inserts the strategy that purpose does not satisfy non-competing access at random, then handle according to competing at random access process.
5. accidental access method as claimed in claim 1, it is characterized in that in the above-mentioned steps 4, base station eNB receives and the described preamble information of demodulation, the non-competing access at random that no matter is assigned to the UE transmission of the lead code in the virtual resource pond selects the competition of this lead code whether to insert collision conflict at random with other, and base station eNB is preferably virtual resource pond lead code and distributes running time-frequency resource.
6. accidental access method as claimed in claim 5, it is characterized in that base station eNB receives and the described preamble information of demodulation, when collision conflict, when base station eNB is filled in uplink authorization information, the bandwidth of only distributing a buffer status report, thereby make access process at random based on non-competing pattern, further apply for scheduling resource by buffer status report, and based on the access process at random of competitive mode, owing to stopping this with transmission MSG3 message, the inadequate resource that distributes inserts at random, but to protect the non-competing success that inserts at random.
7. accidental access method as claimed in claim 5, it is characterized in that base station eNB receives and the described preamble information of demodulation, when collision conflict, scene when switching for the scale user, the base station eNB basis is by the network planning and the setting of optimizing switching band and switching point, the time that calculates the UE of this place sends initiates the non-competing value in advance that inserts at random when value is filled in switching in advance, to realize uplink synchronous.
8. accidental access method as claimed in claim 5, it is characterized in that base station eNB receives and the described preamble information of demodulation, when collision conflict, scene when switching for the scale user, value in advance when base station eNB networks at this place according to the UE of historical record is filled in and is initiated the non-competing value in advance that inserts at random when switching, to realize uplink synchronous.
9. accidental access method as claimed in claim 5, it is characterized in that base station eNB receives and the described preamble information of demodulation, when collision conflict, during for the scene of up asynchronous regime, UE is in connection status, downlink data arrives the access scene of initiating at random, and base station eNB is filled in the value in advance of the UE use of historical record.
10. accidental access method as claimed in claim 1, it is characterized in that above-mentioned based on virtual lead code non-competing insert at random finish after, or will be labeled as lead code release in the virtual resource pond behind this non-competing access failure at random.
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| CN107659969A (en) * | 2017-09-15 | 2018-02-02 | 武汉虹信通信技术有限责任公司 | The method and device of handover success rate is improved in Rail Transit System |
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| CN111726884A (en) * | 2019-03-20 | 2020-09-29 | 中国移动通信有限公司研究院 | Indication method and device |
| CN111819907A (en) * | 2018-02-21 | 2020-10-23 | 鸿颖创新有限公司 | Method and apparatus for determining access and service modification order in next generation network |
| CN112425225A (en) * | 2020-10-21 | 2021-02-26 | 北京小米移动软件有限公司 | Information transmission method and device, and storage medium |
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| US11706807B2 (en) | 2017-11-17 | 2023-07-18 | Huawei Technologies Co., Ltd. | Random access method, network device, and terminal |
| CN109803438A (en) * | 2017-11-17 | 2019-05-24 | 华为技术有限公司 | Accidental access method, the network equipment and terminal |
| CN109803438B (en) * | 2017-11-17 | 2023-11-10 | 华为技术有限公司 | Random access method, network equipment and terminal |
| CN111819907A (en) * | 2018-02-21 | 2020-10-23 | 鸿颖创新有限公司 | Method and apparatus for determining access and service modification order in next generation network |
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