CN107809753A - A kind of control method and device of eMTC terminals connection base station - Google Patents

A kind of control method and device of eMTC terminals connection base station Download PDF

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Publication number
CN107809753A
CN107809753A CN201610806732.9A CN201610806732A CN107809753A CN 107809753 A CN107809753 A CN 107809753A CN 201610806732 A CN201610806732 A CN 201610806732A CN 107809753 A CN107809753 A CN 107809753A
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China
Prior art keywords
emtc
base station
connection
duration
systems
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CN201610806732.9A
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Chinese (zh)
Inventor
赵彦
牛康
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ZTE Corp
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ZTE Corp
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Priority to CN201610806732.9A priority Critical patent/CN107809753A/en
Publication of CN107809753A publication Critical patent/CN107809753A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
    • H04W74/0841—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment
    • H04W74/085—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure with collision treatment collision avoidance

Abstract

The present invention proposes a kind of control method and device of eMTC terminals connection base station, and this method includes：When preparing the base station of eMTC systems described in Stochastic accessing, the random connection of generation first duration；After the connection duration of delay first, random access request is sent to the base station of eMTC systems.This method can avoid a large amount of eMTC terminals while initiate signaling storm caused by random access request, so as to reduce the probability of eMTC network congestions, effectively improve the success rate of eMTC terminal Stochastic accessings base station；The present invention has relatively low complexity, and preferably optimization and improvement effect can be played to the congestion control of eMTC systems.

Description

A kind of control method and device of eMTC terminals connection base station
Technical field
The present invention relates to internet of things field, more particularly to the control method and dress of a kind of eMTC terminals connection base station Put.
Background technology
EMTC (enhanced Machine-Type Communications, enhanced machine type communication) technology is Rel- 13MTC strengthens (eMTC), and WI (Work Item, work item) mainly includes the target of three parts：Low complex degree (UE, Low Cost User Equipment), coverage enhancement (Enhanced Coverage) and economize on electricity (Power Saving).3GPP TS 22.368 (The 3rd Generation Partnership Project TECHNICAL SPECIFICATION 22.368, Third generation Partnership Project technical specification 22.368) according to MTC, (Machine-Type Communications, machine type lead to Letter) technology in the difference of mobility, traffic characteristics etc., defines Hypomobility, time delay tolerance, preferential alarm, low 14 kinds of features such as power consumption, small data packets business.Have with typical scene：Intelligent transportation, intelligent grid, intelligence community, intelligent ring Protect etc..
Based on the application scenarios of eMTC technologies, eMTC terminals can be especially huge in the quantity of a certain cell, even up to sea Amount connection.Therefore eMTC systems are required to support the small data packets business characteristic of short time burst mass users.When eMTC is whole End from closed mode return to open mode when, when eMTC terminals are switched to another base station from a base station or when eMTC is whole When up timing synchronisation information is lost at end, can all carry out random access procedure first, its effect be realize eMTC terminals and The synchronization of eMTC grids side, solve access interference and obtain the uplink resources of base station distribution.EMTC terminals only have By random access procedure, after establishing uplink synchronous with base station, the transmission of ascending resource could be carried out by base station scheduling.
At present according to 3GPP standard from the point of view of, not to eMTC terminals and Legacy LTE (Long Term Evolution) resource of the terminal in PRACH (Physical Random Access Channel, Physical Random Access Channel) There is clear and definite regulation in division, if having using resource multiplex (RO, Resource Overlap) and the implementation of base station side Close, but no matter which kind of mode, the eMTC terminals of magnanimity are likely to send out when limited PRACH resource is being initiated to access Raw signaling congestion, the main distinction are：
If special PRACH resources are divided to eMTC systems, then once the PRACH resources that eMTC systems exclusively enjoy are gathered around Plug, then can cause network service unavailable to eMTC terminals, can not access, substantially reduce service quality；
If eMTC systems use shares PRACH resources with legacy systems, then the connection of eMTC terminals magnanimity is initiated random " signaling storm " caused during access is likely to trigger WB-EUTRAN user not access normally；
As can be seen here, because the random access channel resource of eMTC terminals is limited, and eMTC system business features are magnanimity Connection, i.e., there may exist at any one time it is multiple, even a large amount of eMTC terminals by RACH to base station send out Random access procedure is played, the collision problem thus triggered is inevitable.At them simultaneously to place base station requests RRC (Radio Resource Control, wireless heterogeneous networks) connection is when establishing, it is most likely that random access channel congestion can be caused, caused Serious access collision and delay problem, it is unavailable to even result in network service, so as to substantially reduce network service quality.Cause This, effective congestion control policy in eMTC systems, is particularly important for whole network service quality.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of control method and device of eMTC terminals connection base station, gram Clothes in the prior art a large amount of eMTC terminals simultaneously by RACH into base station initiating random access procedure, it is caused with Machine accesses channel congestion defect.
The technical solution adopted by the present invention is a kind of control of enhanced machine type communication eMTC terminals connection base station Method, applied to any eMTC terminals in eMTC systems, methods described, including：
When preparing the base station of eMTC systems described in Stochastic accessing, the random connection of generation first duration；
After the connection duration of delay first, random access request is sent to the base station of eMTC systems.
Further, it is described when preparing the base station of eMTC systems described in Stochastic accessing, specifically include：
When preparing actively to send Stochastic accessing to the base station of the eMTC systems；
Or when the paging information that the base station for receiving the eMTC systems is sent.
Further, methods described, in addition to：
Before the base station of eMTC systems described in Stochastic accessing is prepared, first according to the type of the eMTC terminals, set most Long connection duration；The first connection duration is less than the most long connection duration.
Further, methods described, in addition to：
After the random access request failure sent to the base station of eMTC systems,
Indicate, be delayed after the preset time if the feedback information of the base station received includes avoiding, it is random raw Into the second connection duration, and it is delayed after the second connection duration, repeats to initiate the random access request to the base station of eMTC systems；
If the feedback information of the base station received does not include avoiding instruction, at random the connection of generation the 3rd duration, and It is delayed after the 3rd connection duration, repeats to initiate the random access request to the base station of eMTC systems；
The second connection duration is less than most long connection duration；The 3rd connection duration is less than most long connection duration.
Further, it is described to repeat to initiate the random access request to the base station of eMTC systems, specifically include：
By way of power ramp, repeat to initiate the random access request to the base station of eMTC systems.
The present invention also provides a kind of control device of enhanced machine type communication eMTC terminals connection base station, is arranged at eMTC Any eMTC terminals in system, described device, including：
Time delay module, for when preparing the base station of eMTC systems described in Stochastic accessing, random generation first to connect duration；
Connection request module, after the first connection duration that is delayed, sending Stochastic accessing to the base station of eMTC systems please Ask.
Further, it is described when preparing the base station of eMTC systems described in Stochastic accessing, specifically include：
When preparing actively to send Stochastic accessing to the base station of the eMTC systems；
Or when the paging information that the base station for receiving the eMTC systems is sent.
Further, described device, in addition to：
Setup module, for the type according to the eMTC terminals, most long connection duration, and the most long connection by described in are set Duration is sent to the time delay module；The first connection duration is less than the most long connection duration.
Further, described device, in addition to：
Request module is again coupled to, after the random access request for being sent when the connection request module fails,
Indicate, be delayed after the preset time if the feedback information of the base station received includes avoiding, it is random raw Into the second connection duration, and it is delayed after the second connection duration, repeats to initiate the random access request to the base station of eMTC systems；
If the feedback information of the base station received does not include avoiding instruction, at random the connection of generation the 3rd duration, and It is delayed after the 3rd connection duration, repeats to initiate the random access request to the base station of eMTC systems；
The second connection duration is less than most long connection duration；The 3rd connection duration is less than most long connection duration.
Further, it is described to repeat to initiate the random access request to the base station of eMTC systems, specifically include：
By way of power ramp, repeat to initiate the random access request to the base station of eMTC systems.
Using above-mentioned technical proposal, the present invention at least has following advantages：
The control method and device of eMTC terminals connection base station of the present invention, can avoid a large amount of eMTC terminals while send out Signaling storm caused by random access request is played, so as to reduce the probability of eMTC network congestions, it is random to effectively improve eMTC terminals The success rate of access base station；For the eMTC systems that PRACH resources are shared with Legacy LTE systems, effectively reduce due to A large amount of eMTC terminals initiate the probability that random access request causes PRACH channels that congestion occurs, and then improve normal WB- EUTRAN (WideBand-Evolved Universal Terrestrial Radio Access Network) user's is normal Access probability；The present invention there is relatively low complexity, the congestion control of eMTC systems can be played preferably optimization with Improvement effect.
Brief description of the drawings
Fig. 1 is that the eMTC terminals of first embodiment of the invention connect the control method flow chart of base station；
Fig. 2 is that the eMTC terminals of second embodiment of the invention connect the control method flow chart of base station；
Fig. 3 is that the eMTC terminals of third embodiment of the invention connect the control method flow chart of base station；
Fig. 4 is that the eMTC terminals of fourth embodiment of the invention connect the control device composition structural representation of base station；
Fig. 5 is that the eMTC terminals of fifth embodiment of the invention connect the control device composition structural representation of base station；
Fig. 6 is that the eMTC terminals of sixth embodiment of the invention connect the control device composition structural representation of base station；
Fig. 7 is that the eMTC terminals of seventh embodiment of the invention connect the control method flow chart of base station；
Fig. 8 is that the eMTC terminals of eighth embodiment of the invention connect the control method flow chart of base station.
Embodiment
Further to illustrate the present invention to reach the technological means and effect that predetermined purpose is taken, below in conjunction with accompanying drawing And preferred embodiment, the present invention is described in detail as after.
First embodiment of the invention, a kind of control method of eMTC terminals connection base station, as shown in figure 1, including following tool Body step：
Step S101, when eMTC terminals prepare the base station of Stochastic accessing eMTC systems, the generation first at random of eMTC terminals Connect duration.
Specifically, step S101, including：
When eMTC terminals are in IDLE (free time) state, and prepare actively to send Stochastic accessing to the base station of eMTC systems When, generation first connects duration to eMTC terminals at random；
Or when eMTC terminals are in IDLE (free time) state, and seeking of sending of the base station for receiving the eMTC systems When exhaling information, generation first connects duration to eMTC terminals at random.
Such as：When eMTC terminals are in IDLE (free time) state, and prepare actively to send at random to the base station of eMTC systems During access, generation first connects duration t to eMTC terminals at random10=10.2ms.
Or when eMTC terminals are in IDLE (free time) state, and seeking of sending of the base station for receiving the eMTC systems When exhaling information, generation first connects duration t to eMTC terminals at random10=10.2ms.
Step S102, eMTC terminal sends Stochastic accessing after the connection duration of delay first to the base station of eMTC systems Request.
For example, eMTC terminals are in the connection duration of delay first t10After=10.2ms, to the base station of eMTC systems send with Machine access request.
Second embodiment of the invention, a kind of control method of eMTC terminals connection base station, as shown in Fig. 2 the present embodiment Methods described, including step in detail below：
Step S201, according to the type of eMTC terminals, most long connection duration is set.
For example, according to the type of eMTC terminals, most long connection duration t is setx=20ms.
Because the business of different types of eMTC terminals carrying has different requirements to Stochastic accessing time delay, therefore according to eMTC The type of terminal is different, and different most long connection durations is set to different types of eMTC terminals.
Step S202, when eMTC terminals prepare the base station of Stochastic accessing eMTC systems, the generation first at random of eMTC terminals Connect duration.Wherein, the first connection duration is less than most long connection duration.
Specifically, step S202, including：
When eMTC terminals are in IDLE (free time) state, and prepare actively to send Stochastic accessing to the base station of eMTC systems When, generation first connects duration to eMTC terminals at random；
Or when eMTC terminals are in IDLE (free time) state, and seeking of sending of the base station for receiving the eMTC systems When exhaling information, generation first connects duration to eMTC terminals at random.Wherein, the first connection duration is less than most long connection duration.
Such as：When eMTC terminals are in IDLE (free time) state, and prepare actively to send at random to the base station of eMTC systems During access, generation is less than most long connection duration t to eMTC terminals at randomx=20ms the first connection duration t10=10.2ms.
Or when eMTC terminals are in IDLE (free time) state, and seeking of sending of the base station for receiving the eMTC systems When exhaling information, generation is less than most long connection duration t to eMTC terminals at randomx=20ms the first connection duration t10=10.2ms.
Step S203, eMTC terminal sends Stochastic accessing after the connection duration of delay first to the base station of eMTC systems Request.
For example, eMTC terminals are in the connection duration of delay first t10After=10.2ms, to the base station of eMTC systems send with Machine access request.
Third embodiment of the invention, a kind of control method of eMTC terminals connection base station, as shown in figure 3, the present embodiment Methods described, including step in detail below：
Step S301, according to the type of eMTC terminals, most long connection duration is set.
Such as：According to the type of eMTC terminals, most long connection duration t is setx=20ms.
Because the business of different types of eMTC terminals carrying has different requirements to Stochastic accessing time delay, therefore according to eMTC The type of terminal is different, and different most long connection durations is set to different types of eMTC terminals.
Step S302, when eMTC terminals prepare the base station of Stochastic accessing eMTC systems, generation is less than eMTC terminals at random First connection duration of most long connection duration.
Specifically, step S302, including：
When eMTC terminals are in IDLE (free time) state, and prepare actively to send Stochastic accessing to the base station of eMTC systems When, generation is less than most long the first connection duration for connecting duration to eMTC terminals at random；
Or when eMTC terminals are in IDLE (free time) state, and seeking of sending of the base station for receiving the eMTC systems When exhaling information, generation is less than most long the first connection duration for connecting duration to eMTC terminals at random.
Such as：When eMTC terminals are in IDLE (free time) state, and prepare actively to send at random to the base station of eMTC systems During access, generation is less than most long connection duration t to eMTC terminals at randomx=20ms the first connection duration t10=10.2ms.
Or when eMTC terminals are in IDLE (free time) state, and seeking of sending of the base station for receiving the eMTC systems When exhaling information, generation is less than most long connection duration t to eMTC terminals at randomx=20ms the first connection duration t10=10.2ms.
Step S303, eMTC terminal sends Stochastic accessing after the connection duration of delay first to the base station of eMTC systems Request.
For example, eMTC terminals are in the connection duration of delay first t10After=10.2ms, to the base station of eMTC systems send with Machine access request.
Step S304, after the random access request that the base station of eMTC terminals to eMTC systems is sent fails, eMTC is whole End repeats to initiate the random access request to the base station of eMTC systems.
Specifically, step S304, including：
If the feedback information for the base station that eMTC terminals receive is judged to including avoiding instruction, be delayed the preset time it Afterwards, random generation is less than the second connection duration of most long connection duration, and is delayed after the second connection duration, passes through power ramp Mode, repeat initiate to the base station of eMTC systems random access request；
Such as：If the feedback information for the base station that eMTC terminals receive is judged to including avoiding instruction, be delayed td= After 30ms, random generation is less than most long connection duration tx=20ms the second connection duration t20=13.5ms, and delay second Connect duration t20After=13.5ms, by way of power ramp, repeat to initiate the Stochastic accessing to the base station of eMTC systems Request.
If the feedback information for the base station that eMTC terminals receive is judged to not including avoiding instruction, generate at random small In the 3rd connection duration of most long connection duration, and it is delayed after the 3rd connection duration, by way of power ramp, repeats to send out Play the random access request to the base station of eMTC systems.
Such as：If the feedback information for the base station that eMTC terminals receive is judged to not including avoiding instruction, random generation Less than most long connection duration tx=20ms the 3rd connection duration t30=13.9ms, and the 3rd connection duration t that is delayed30=13.9ms Afterwards, by way of power ramp, repeat to initiate the random access request to the base station of eMTC systems.
Until the base station of eMTC terminal Stochastic accessing eMTC systems.
Fourth embodiment of the invention, corresponding with first embodiment, the present embodiment introduces a kind of eMTC terminals connection base station Control device, as shown in figure 4, including consisting of part：
1) time delay module 200, for when eMTC terminals prepare Stochastic accessing eMTC systems base station when, generate first at random Connect duration.
Specifically, time delay module 200, is used for：
When eMTC terminals are in IDLE (free time) state, and prepare actively to send Stochastic accessing to the base station of eMTC systems When, generation first connects duration to eMTC terminals at random；
Or when eMTC terminals are in IDLE (free time) state, and seeking of sending of the base station for receiving the eMTC systems When exhaling information, generation first connects duration to eMTC terminals at random.
Such as：Time delay module 200, for being in IDLE (free time) state when eMTC terminals, and prepare actively to eMTC systems When the base station of system sends Stochastic accessing, generation first connects duration t to eMTC terminals at random10=10.2ms.
Or when eMTC terminals are in IDLE (free time) state, and seeking of sending of the base station for receiving the eMTC systems When exhaling information, generation first connects duration t to eMTC terminals at random10=10.2ms.
2) connection request module 300, for eMTC terminals after the connection duration of delay first, to the base station of eMTC systems Send random access request.
For example, connection request module 300, for eMTC terminals in the connection duration of delay first t10After=10.2ms, to The base station of eMTC systems sends random access request.
Fifth embodiment of the invention, corresponding with second embodiment, the present embodiment introduces a kind of eMTC terminals connection base station Control device, as shown in figure 5, including consisting of part：
1) setup module 100, for the type according to eMTC terminals, most long connection duration is set.
For example, setup module 100, for the type according to eMTC terminals, sets most long connection duration tx=20ms.
Because the business of different types of eMTC terminals carrying has different requirements to Stochastic accessing time delay, therefore according to eMTC The type of terminal is different, and different most long connection durations is set to different types of eMTC terminals.
2) time delay module 200, during base station for preparing Stochastic accessing eMTC systems when eMTC terminals, random generation is less than First connection duration of most long connection duration.
Specifically, time delay module 200, for being in IDLE (free time) state when eMTC terminals, and prepares actively to eMTC When the base station of system sends Stochastic accessing, generation is less than most long the first connection duration for connecting duration to eMTC terminals at random；
Or when eMTC terminals are in IDLE (free time) state, and seeking of sending of the base station for receiving the eMTC systems When exhaling information, generation is less than most long the first connection duration for connecting duration to eMTC terminals at random.
Such as：Time delay module 200, for being in IDLE (free time) state when eMTC terminals, and prepare actively to eMTC systems When the base station of system sends Stochastic accessing, generation is less than most long connection duration t to eMTC terminals at randomx=20ms the first connection duration t10=10.2ms.
Or when eMTC terminals are in IDLE (free time) state, and seeking of sending of the base station for receiving the eMTC systems When exhaling information, generation is less than most long connection duration t to eMTC terminals at randomx=20ms the first connection duration t10=10.2ms.
3) connection request module 300, for eMTC terminals after the connection duration of delay first, to the base station of eMTC systems Send random access request.
For example, connection request module 300, for eMTC terminals after the connection duration of delay first t10=10.2ms, to The base station of eMTC systems sends random access request.
Sixth embodiment of the invention, corresponding with 3rd embodiment, the present embodiment introduces a kind of eMTC terminals connection base station Control device, as shown in fig. 6, including consisting of part：
1) setup module 100, for the type according to eMTC terminals, most long connection duration is set.
For example, setup module 100, for the type according to eMTC terminals, sets most long connection duration tx=20ms.
Because the business of different types of eMTC terminals carrying has different requirements to Stochastic accessing time delay, therefore according to eMTC The type of terminal is different, and different most long connection durations is set to different types of eMTC terminals.
2) time delay module 200, during base station for preparing Stochastic accessing eMTC systems when eMTC terminals, random generation is less than First connection duration of most long connection duration.
Specifically, time delay module 200, is used for：
When eMTC terminals are in IDLE (free time) state, and prepare actively to send Stochastic accessing to the base station of eMTC systems When, generation is less than most long the first connection duration for connecting duration to eMTC terminals at random；
Or when eMTC terminals are in IDLE (free time) state, and seeking of sending of the base station for receiving the eMTC systems When exhaling information, generation is less than most long the first connection duration for connecting duration to eMTC terminals at random.
Such as：Time delay module 200, for being in IDLE (free time) state when eMTC terminals, and prepare actively to eMTC systems When the base station of system sends Stochastic accessing, generation is less than most long connection duration t to eMTC terminals at randomx=20ms the first connection duration t10=10.2ms.
Or when eMTC terminals are in IDLE (free time) state, and seeking of sending of the base station for receiving the eMTC systems When exhaling information, generation is less than most long connection duration t to eMTC terminals at randomx=20ms the first connection duration t10=10.2ms.
3) connection request module 300, for eMTC terminals after the connection duration of delay first, to the base station of eMTC systems Send random access request.
For example, connection request module 300, for eMTC terminals in the connection duration of delay first t10After=10.2ms, to The base station of eMTC systems sends random access request.
4) request module 400 is again coupled to, for failing it when the random access request sent to the base station of eMTC systems Afterwards, eMTC terminals repeat to initiate the random access request to the base station of eMTC systems.
Specifically, being again coupled to request module 400, it is used for：
If the feedback information for the base station that eMTC terminals receive is judged to including avoiding instruction, be delayed the preset time it Afterwards, random generation is less than the second connection duration of most long connection duration, and is delayed after the second connection duration, passes through power ramp Mode, repeat initiate to the base station of eMTC systems random access request；
Such as：If the feedback information for the base station that eMTC terminals receive is judged to including avoiding instruction, be delayed td= After 30ms, random generation is less than most long connection duration tx=20ms the second connection duration t20=13.5ms, and delay second Connect duration t20After=13.5ms, by way of power ramp, repeat to initiate the Stochastic accessing to the base station of eMTC systems Request.
If the feedback information for the base station that eMTC terminals receive is judged to not including avoiding instruction, generate at random small In the 3rd connection duration of most long connection duration, and it is delayed after the 3rd connection duration, by way of power ramp, repeats to send out Play the random access request to the base station of eMTC systems.
Such as：If the feedback information for the base station that eMTC terminals receive is judged to not including avoiding instruction, random generation Less than most long connection duration tx=20ms the 3rd connection duration t30=13.9ms, and the 3rd connection duration t that is delayed30=13.9ms Afterwards, by way of power ramp, repeat to initiate the random access request to the base station of eMTC systems.
Until the base station of eMTC terminal Stochastic accessing eMTC systems.
Seventh embodiment of the invention, the present embodiment are on the basis of above-described embodiment, and base station is connected with eMTC terminals Exemplified by control method, an application example of the invention is introduced with reference to accompanying drawing 7.
Step S801, timer is set in eMTC terminals, the most long duration T of timer, such as T=100ms are set.
Step S802, when eMTC terminals are in IDLE (free time) state, and eMTC terminals have calling service or connect When receiving the beep-page message from base station, eMTC terminals generate a time kind at random according to uniformly distributed function in [0, T] Sub- t1, such as：t1=12.1ms, and round up to obtain t1=13ms.
Step S803, when eMTC terminals obtain time seed t1Afterwards, start timer and start timing, timer enters activation State.
Step S804, eMTC terminal is after timer startup, timer-delay time seed t1Duration, such as：Timer Postpone 13ms durations, random access request is initiated to base station；Timer zero simultaneously, and enter inactive state.
Step S805, to eMTC terminals, whether access base station judges, if eMTC terminals connect at random to what base station was initiated Enter failure, perform step S806.
Step S806, if the random access failure that eMTC terminals are initiated to base station, eMTC terminals can be again using uniform The function of distribution generation random time seed t in [0, T]2, such as t2=7.8ms, and round up to obtain t2=8ms；eMTC Terminal obtains random time seed t2Afterwards, it is again started up timer and starts timing, timer enters state of activation.EMTC terminals exist After timer starts, timer-delay 8ms durations, random access request is initiated to base station by way of power ramp；Simultaneously Timer is zeroed, and enters inactive state.
Step S807, to eMTC terminals, whether access base station judges, if eMTC terminals connect at random to what base station was initiated Enter failure, perform step S806.
Step S808, eMTC base station access by terminal.
Eighth embodiment of the invention, the present embodiment are on the basis of above-described embodiment, and base station is connected with eMTC terminals Exemplified by control method, an application example of the invention is introduced with reference to accompanying drawing 8.
Step S901, timer is set in eMTC terminals, the most long duration T of timer, such as T=100ms are set.
Step S902, when eMTC terminals are in IDLE (free time) state, and eMTC terminals have calling service or connect When receiving the beep-page message from base station, eMTC terminals generate a time kind at random according to uniformly distributed function in [0, T] Sub- t3, such as：t3=13.1ms, and round up to obtain t3=14ms.
Step S903, when eMTC terminals obtain time seed t3Afterwards, start timer and start timing, timer enters activation State.
Step S904, eMTC terminal is after timer startup, timer-delay 14ms durations, and Stochastic accessing is initiated to base station Request；Timer zero simultaneously, and enter inactive state.
Step S905, to eMTC terminals, whether access base station judges, if eMTC terminals connect at random to what base station was initiated Enter failure, perform step S906.
Step S906, the RAR (Random Access Response, Stochastic accessing are corresponding) that docking receives base station feedback disappear Whether judged in breath comprising BI (Backoff Indicator, keeping out of the way instruction).
It is judged to including BI in the RAR message of base station feedback if receiving, performs step S907；
It is judged to not including BI in the RAR message of base station feedback if receiving, performs step S908.
Leading collision occurs for step S907, eMTC terminal and random access failure, eMTC terminals are actively avoided, and waits After one section of duration, such as wait 20ms, step S908 is performed.
Step S908, eMTC terminal can generate random time seed t using uniformly distributed function in [0, T] again4, Such as t4=9.8ms, and round up to obtain t4=10ms；EMTC terminals obtain random time seed t4Afterwards, it is again started up timing Device starts timing, and timer enters state of activation.EMTC terminals timer-delay 10ms durations, pass through after timer startup The mode of power ramp initiates random access request to base station；Timer zero simultaneously, and enter inactive state.
Step S909, to eMTC terminals, whether access base station judges, if eMTC terminals connect at random to what base station was initiated Enter failure, perform step S906.
Step S910, eMTC base station access by terminal.
By the explanation of embodiment, should can to the present invention for reach technological means that predetermined purpose is taken and Effect is able to more go deep into and specific understanding, but appended diagram is only to provide reference and purposes of discussion, not for this Invention is any limitation as.

Claims (10)

  1. A kind of 1. control method of enhanced machine type communication eMTC terminals connection base station, applied to any in eMTC systems EMTC terminals, it is characterised in that methods described, including：
    When preparing the base station of eMTC systems described in Stochastic accessing, the random connection of generation first duration；
    After the connection duration of delay first, random access request is sent to the base station of eMTC systems.
  2. 2. the control method of eMTC terminals connection base station according to claim 1, it is characterised in that described random when preparing When accessing the base station of the eMTC systems, specifically include：
    When preparing actively to send Stochastic accessing to the base station of the eMTC systems；
    Or when the paging information that the base station for receiving the eMTC systems is sent.
  3. 3. the control method of eMTC terminals connection base station according to claim 1, it is characterised in that methods described, also wrap Include：
    Before the base station of eMTC systems described in Stochastic accessing is prepared, first according to the type of the eMTC terminals, most long company is set Connect duration；The first connection duration is less than the most long connection duration.
  4. 4. the control method of eMTC terminals connection base station according to claim 3, it is characterised in that methods described, also wrap Include：
    After the random access request failure sent to the base station of eMTC systems,
    Indicate, be delayed after the preset time if the feedback information of the base station received includes avoiding, generate the at random Two connection durations, and be delayed after the second connection duration, repeat to initiate the random access request to the base station of eMTC systems；
    If the feedback information of the base station received does not include avoiding instruction, the random connection of generation the 3rd duration, and is delayed After 3rd connection duration, repeat to initiate the random access request to the base station of eMTC systems；
    The second connection duration is less than most long connection duration；The 3rd connection duration is less than most long connection duration.
  5. 5. the control method of eMTC terminals according to claim 4 connection base station, it is characterised in that it is described repeat to initiate to The random access request of the base station of eMTC systems, is specifically included：
    By way of power ramp, repeat to initiate the random access request to the base station of eMTC systems.
  6. 6. a kind of control device of enhanced machine type communication eMTC terminals connection base station, any being arranged in eMTC systems EMTC terminals, it is characterised in that described device, including：
    Time delay module, for when preparing the base station of eMTC systems described in Stochastic accessing, random generation first to connect duration；
    Connection request module, after the first connection duration that is delayed, random access request is sent to the base station of eMTC systems.
  7. 7. the control device of eMTC terminals connection base station according to claim 6, it is characterised in that described random when preparing When accessing the base station of the eMTC systems, specifically include：
    When preparing actively to send Stochastic accessing to the base station of the eMTC systems；
    Or when the paging information that the base station for receiving the eMTC systems is sent.
  8. 8. the control device of eMTC terminals connection base station according to claim 6, it is characterised in that described device, also wrap Include：
    Setup module, for the type according to the eMTC terminals, most long connection duration, and the most long connection duration by described in are set Send to the time delay module；The first connection duration is less than the most long connection duration.
  9. 9. the control device of eMTC terminals connection base station according to claim 8, it is characterised in that described device, also wrap Include：
    Request module is again coupled to, after the random access request for being sent when the connection request module fails,
    Indicate, be delayed after the preset time if the feedback information of the base station received includes avoiding, generate the at random Two connection durations, and be delayed after the second connection duration, repeat to initiate the random access request to the base station of eMTC systems；
    If the feedback information of the base station received does not include avoiding instruction, the random connection of generation the 3rd duration, and is delayed After 3rd connection duration, repeat to initiate the random access request to the base station of eMTC systems；
    The second connection duration is less than most long connection duration；The 3rd connection duration is less than most long connection duration.
  10. 10. the control method of eMTC terminals connection base station according to claim 9, it is characterised in that described to repeat to initiate To the random access request of the base station of eMTC systems, specifically include：
    By way of power ramp, repeat to initiate the random access request to the base station of eMTC systems.
CN201610806732.9A 2016-09-07 2016-09-07 A kind of control method and device of eMTC terminals connection base station Pending CN107809753A (en)

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WO2020014968A1 (en) * 2018-07-20 2020-01-23 Qualcomm Incorporated Earthquake and tsunami warning system (etws) and commercial mobile alert service (cmas) in connected mode for the enhanced coverage user equipment (ue)
CN112769707A (en) * 2019-11-04 2021-05-07 成都鼎桥通信技术有限公司 Method, device and system for preventing congestion in Internet of things
CN112867140A (en) * 2021-01-05 2021-05-28 珠海格力电器股份有限公司 Communication method and device of Internet of things equipment

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Application publication date: 20180316