CN104185293B - A kind of resource allocation methods of random access signaling flow - Google Patents
A kind of resource allocation methods of random access signaling flow Download PDFInfo
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- CN104185293B CN104185293B CN201310197080.XA CN201310197080A CN104185293B CN 104185293 B CN104185293 B CN 104185293B CN 201310197080 A CN201310197080 A CN 201310197080A CN 104185293 B CN104185293 B CN 104185293B
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Abstract
A kind of resource allocation methods of random access signaling flow, methods described includes：ENB is after random access lead code Msg1 is received, according to Msg1 Msg2 is sent with accidental access response Msg2 resource impact relation on the DL SCH of corresponding frequency band, Msg2 includes ascending resource distribution mandate, and the ascending resource distribution authorizes continuously effective, authorized until eNB sends ascending resource release；ENB is received after the 3rd message Msg3, if downlink signaling is transmitted, and downlink resource distribution mandate is issued to UE by PDCCH, and downlink resource distribution authorizes continuously effective, is authorized until eNB sends downlink resource release.After the embodiment of the present invention, signalling time delay can be reduced, the time for setting up RRC connections is reduced and then improves user's success rate of attachment.
Description
Technical field
The application is related to communication technical field, more particularly, to a kind of resource allocation side of random access signaling flow
Method.
Background technology
In the broadband access system based on TD-LTE technologies, system bandwidth is divided into multiple sons continuously or discontinuously
Band.In order to reduce cost and implementation complexity, user equipment (UE) can be operated in list band model, i.e. UE receiver bandwidth
Need not be whole system bandwidth, UE is operated in all or part of subband according to the different choice of hardware capabilities, ability most weak UE
Only it is operated in list band.So, the requirement to UE receiver bandwidths is reduced, demand of the system to hardware capabilities is also reduced.
One typical application scenarios is electric power load monitoring and control communication network, and its frequency spectrum is discrete to be distributed in 230M frequency ranges, bandwidth
For 8.15MHz, 40 25kHz subband is had, the subband of minimum frequency is 223.525MHz, and the subband of highest frequency is
231.65MHz.Electric power load monitoring and control communication network 230MHz band frequency resource distribution schematic diagrames are as shown in Figure 1.
System bandwidth is further divided into synchronous subband and business subband according to function.Synchronous subband be used for system broadcasts and
Down-going synchronous, broadcast channel (PBCH), synchronizing signal (PSS/SSS) and Physical Random Access Channel (PRACH) are operated in together
Step band.Business subband for business transmit, downlink physical shared channel (PDSCH), Physical Downlink Control Channel (PDCCH),
Physical transport format indicates channel (PCFICH) and Physical HARQ Indicator Channel (PHICH), uplink physical channel dispatch request
(SR), Physical Uplink Control Channel (PUCCH) and Physical Downlink Shared Channel (PUSCH) are operated in business subband.
Random access procedure plays the effect of key in the broadband access system based on TD-LTE technologies, is that UE is carried out
RRC connections foundation, RRC connection reconstructions, switching, realize uplink synchronous and up shared when going to from idle condition connection status
Unique strategy of channel (UL-SCH) resource request.The purpose of Stochastic accessing includes：One is UE is obtained upstream time synchronization, two
It is that unique terminal identifier is set up between network side and UE.
Random access procedure is divided into two kinds of competition Stochastic accessing and non-competing Stochastic accessing.ENB does not have in competition Stochastic accessing
Promising UE distributes dedicated preamble, but randomly chooses lead code in lead code pond by UE and initiate Stochastic accessing, there is resource
The risk of collision；ENB is that UE distributes dedicated preamble in non-competing Stochastic accessing, and UE application specifics lead code is initiated to connect at random
Enter, in the absence of the risk of resource collision.
Process is set up in A, RRC connection, and using competition Stochastic accessing, the message of interaction is as follows between UE and eNB：
1.1) Msg1~Msg2, UE initiate random access lead code (Msg1) in RACH, and eNB is received after Msg1
Accidental access response (Msg2) is sent in DSCH Downlink Shared Channel (DL-SCH), it is up first in UL-SCH that wherein Msg2 carries UE
The mandate of transmission.
1.2) Msg3~Msg4, UE initiate the 3rd message (Msg3) in UL-SCH, and Msg3 herein is RRC connection request.
Competition resolution is sent in DL-SCH and message (Msg4) is set up in RRC connections after eNB receptions Msg3.UE receive Msg4 after, receive with
The related competition resolution of user's mark, it is believed that success Stochastic accessing, RRC switchs to connection status from idle condition.So far connect at random
Enter process completion.
1.3) Msg5, UE send RRC connection setup complete messages on the ul-sch, wherein carrying NAS layers of attach request
Message.Msg1 to Msg5 is signalling process, and process completion is set up in so far RRC connections.Subsequently continue to complete security activation
Set up, RRC connections are matched somebody with somebody again, up NAS message transmission (carrying attachment to complete), UE attaching process is completed.
B, RRC connection reconstruction process, using competition Stochastic accessing, the message of interaction is as follows between UE and eNB：
2.1) Msg1~Msg2, UE initiate random access lead code (Msg1) in RACH, and eNB is received after Msg1
Accidental access response (Msg2) is sent in DL-SCH, wherein carrying mandates of the UE in UL-SCH uplink first.
2.2) Msg3~Msg4, UE initiate Msg3 in UL-SCH, and Msg3 herein is the request of RRC connection reconstructions.ENB is received
After Msg3 competition resolution and RRC connection reconstructions message (Msg4) are sent in DL-SCH.UE is received after Msg4, is received and is identified with user
Related competition resolution, it is believed that success Stochastic accessing.So far random access procedure is completed.
2.3) Msg5, UE send RRC connection reconstruction completion messages on the ul-sch.Msg1 to Msg5 is signalling mistake
Journey, so far RRC connection reconstructions process completion.Subsequently RRC connections are continued to complete again to match somebody with somebody.
C, handoff procedure, using non-competing Stochastic accessing.Before UE and target eNB communications, target eNB first will be necessary
Configuration information is transparently forwarded to UE again by RRC connections reallocation message (including switching command) the source eNB of issuing.Then, UE is to mesh
Mark eNB and initiate non-competing Stochastic accessing, obtain the uplink synchronous with Target cell and ascending resource mandate.UE and target eNB
Between interaction message it is as follows：
3.1) Msg1~Msg2, UE initiate non-competing random access lead code (Msg1) in RACH, and eNB is received
Accidental access response (Msg2) is sent in DL-SCH after Msg1, wherein carrying mandates of the UE in UL-SCH uplink first.
So far non-competing random access procedure is completed.
3.2) Msg3, UE send Msg3 in UL-SCH.Msg3 herein is that RRC matches somebody with somebody completion message again, indicates that switching is completed.
The signalling interactive process of random access procedure is started from above-mentioned, and Msg1 is in special uplink random access channel hair
Rise, when sending Msg2, eNB can only recognize the resource of Stochastic accessing selection, it is impossible to recognize UE, so UE monitors Msg2 resource
There are predefined mapping relations with transmission Msg1 resource.In addition, the follow-up up-downgoing interactive information since Msg3
Sent all on UL-SCH or DL-SCH, resource used is by dispatching distribution.Show as：
1) eNB is received after the random access lead code (Msg1) that UE is initiated, and Msg2 is sent in DL-SCH, wherein carrying UE
The resource used in UL-SCH uplink first (Msg3), and resource acquiescence release after Msg3 transmission success.
2) for competition random access procedure, eNB is received after Msg3, and sending descending start by PDCCH authorizes, in DL-
SCH sends Msg4 (carrying competition resolution).UE be properly received with user identify match competition resolution then expression Stochastic accessing into
Work(, so far random access procedure completion.Then, eNB needs to redistribute up-downgoing resource, is built with transmitting necessary RRC connections
It is vertical to complete or the up-downgoing interaction message such as RRC connection reconstructions are completed, RRC connections are matched somebody with somebody again.
3) for non-competing random access procedure, UE is properly received the accidental access response matched with random access lead code
Stochastic accessing success is then represented, so far random access procedure is completed.ENB is received after Msg3, if also up-downgoing interaction message
Send, it is necessary to redistribute up-downgoing resource.
Because the time of user equipment access network is with randomness, initiation to be may be simultaneously present in network and is connect at random
The user entered and the scheduled user of the wait in RRC connection status.
Due to the importance of access procedure, during dispatching distribution resource, the User Priority of initiation Stochastic accessing, which is higher than, to be in
The User Priority that the wait of RRC connection status is scheduled.
In the prior art, it is preferential to ensure that message is transmitted in random access procedure when multiple users initiate Stochastic accessing simultaneously
Required resource.After Stochastic accessing success, the user in RRC connection status, which requeues, waits scheduling, its dispatching priority
Level is less than the dispatching priority for the user for initiating Stochastic accessing, therefore remaining up-downgoing interaction message will then wait all users
Stochastic accessing all after the completion of just have idling-resource and transmitted, extend the time delay of Signalling exchange.
Especially, the primary link that the signaling process of UE starts is in communication with each other as UE and network, its importance and necessity
Property is self-evident.In the case where system time frequency resource is less, it is accomplished to RRC connections foundation from Stochastic accessing and completes (to carry attached
Request) and the Transmission Time Interval of other up-downgoing interaction messages of subsequent attachment process will be elongated, attachment can be extended
Time delay, attachment Message Waiting Time is long and overtime, and Stochastic accessing can only be initiated again, reduces user's success rate of attachment.
The content of the invention
The embodiment of the present invention proposes a kind of resource allocation methods of random access signaling flow, can reduce and set up RRC companies
The time connect, and then improve user's success rate of attachment.
The technical scheme of the embodiment of the present invention is as follows：
A kind of resource allocation methods of random access signaling flow, methods described includes：
ENB is closed after random access lead code Msg1 is received according to Msg1 and accidental access response Msg2 resource impact
Msg2 is sent on the DL-SCH for tying up to corresponding frequency band, Msg2 includes ascending resource distribution mandate, and the ascending resource point
With continuously effective is authorized, authorized until eNB sends ascending resource release；
ENB is received after the 3rd message Msg3, if downlink signaling transmit, by physical downlink control channel PDCCH to
UE issues downlink resource distribution mandate, and downlink resource distribution authorizes continuously effective, until eNB sends downlink resource release
Authorize；
UE transmits up signaling in ascending resource distribution authorizes corresponding uplink transmission resource, up until receiving
Resource release discharges the uplink transmission resource after authorizing；
ENB transmits downlink signaling in downlink resource distribution authorizes corresponding downlink transfer resource, until under transmission
The release of row resource discharges the downlink transfer resource after authorizing.
When list band is transmitted, the uplink transmission resource and the downlink transfer resource are on the same frequency band.
Methods described further comprises：Logic channel 1 or the caching of logic channel 2 are empty time in uplink/downlink resource
Number is more than default first threshold, then discharges the uplink/downlink resource.
The first threshold is more than 5.
Methods described further comprises：In uplink/downlink resource logic channel 3 into logic channel 10 any one patrol
The number of times for collecting channel transmission data is more than default Second Threshold, then discharges the uplink/downlink resource.
The Second Threshold is less than 5.
From above-mentioned technical proposal as can be seen that in embodiments of the present invention eNB after Msg1 is received, according to Msg1 with
Msg2 resource impact relation sends Msg2 on the DL-SCH of corresponding frequency band, and Msg2 includes ascending resource distribution mandate；
ENB is received after Msg3, and downlink resource distribution mandate is issued to UE by PDCCH；So UE just can be in uplink transmission resource
Up signaling is transmitted, the ascending resource is not discharged not receiving ascending resource release and authorizing；Passed likewise, eNB is descending
Downlink signaling is transmitted in defeated resource, the downlink transfer resource is discharged until sending after downlink resource release is authorized.So, it is ensured that
Resource during row signalling over/under, the time for setting up RRC connections can be reduced by initiating the user of Stochastic accessing, be entered
And improve user's success rate of attachment.
Brief description of the drawings
Fig. 1 is power network 230MHz band frequency resource distribution schematic diagrames；
Fig. 2 is the resource allocation schematic flow sheet of random access signaling flow.
Embodiment
It must be more clearly understood to express the object, technical solutions and advantages of the present invention, below in conjunction with the accompanying drawings and specifically
The present invention is further described in more detail for embodiment.
In embodiments of the present invention, uplink transmission resource and downlink transfer resource are determined in the random access procedure.At random
The message of access procedure is provided to the message of subsequent attachment process or other necessary up-downgoing Signalling exchange message with uplink
Source, the binding of downlink transfer resource, could discharge the transfer resource after receiving resource release and authorizing, can reduce same user
To obtain the Signalling exchange time delay of transfer resource, and then success rate of attachment can be improved.
In addition, recognizing that signaling process terminates by given threshold, resource is discharged as quickly as possible so that other users are quick
Access or carry out data transmission.
It is the resource allocation schematic flow sheet of random access signaling flow referring to accompanying drawing 2, specifically includes following steps：
201st, eNB is after Msg1 is received, according to Msg1 and Msg2 resource impact relation corresponding frequency band DL-SCH
Upper transmission Msg2, Msg2 include ascending resource distribution mandate.
UL-SCH ascending resource distribution, which is authorized, to be carried in the accidental access response of random access procedure.ENB is being received
After Msg1, sent according to the DL-SCH of predefined Msg1 and Msg2 resource impact relations on assigned frequency band in Msg2, Msg2
Carry UE row Grant for resource allocation on the ul-sch.
202nd, eNB is received after Msg3, and downlink resource distribution mandate is issued to UE by PDCCH.
ENB is properly received after Msg3, if downlink signaling is transmitted, and issuing downlink resource distribution to UE by PDCCH awards
Power, its downlink resource distribution authorizes continuously effective, is authorized until eNB sends downlink resource release.
To support terminal is only operated in list band, up-downgoing signalling interactive process uplink and downlink transfer must be
Carried out on same frequency band, to avoid frequently subband switching from authorizing.So, when distributing resource, if downstream message is needed
Send, sending downlink resource by PDCCH distributes mandate, and distribution is with uplink identical frequency band to initiation Stochastic accessing
User.
203rd, UE transmits up signaling in uplink transmission resource, receives and the up biography is discharged after ascending resource release is authorized
Defeated resource；ENB transmits downlink signaling in downlink transfer resource, and the descending biography is discharged after downlink resource release is authorized until sending
Defeated resource.UE transmits up signaling in uplink transmission resource, gives tacit consent to the uplink transmission resource continuously effective.It is up transferring
It is not to discharge the uplink transmission resource at once after signaling, but is receiving after ascending resource release authorizes, then to discharge this up
Transfer resource.
ENB transmits downlink signaling in downlink transfer resource, gives tacit consent to the downlink transfer resource continuously effective.In the case where transferring
Sent after row signaling or without downlink signaling, then send downlink resource release and authorize, discharge the downlink transfer resource.
According to existing protocol configuration, logic channel is divided into 0...15, wherein 0,1,2 correspond to Signaling Radio Bearer respectively
(SRB) 0, SRB1, SRB2,3~10 be Data Radio Bearer (DRB), and other is retention.
In the signaling process triggered by random access procedure, because the Stochastic accessing initiated is set up in RRC connections, the last item is empty
Message order is the uplink information transmission message (carrying attachment to complete) that UE is initiated, and is carried on SRB2；Because of RRC connection reconstructions or because small
The Stochastic accessing that area's switching is initiated, the last item space interface signaling is that completion message is matched somebody with somebody in the RRC connections that UE is initiated again, is carried on
SRB1。
So, scheduling can recognize the last item space interface signaling that UE is initiated, Yi Jitong by logical channel number 1 or 2
Logical channel number 3~10 is crossed to recognize transmission DRB.
First threshold is that logic channel 1 or 2 is empty minimum number.That is, when logic channel 1 or 2 is empty time
Number exceedes first threshold, it is determined that signaling process terminates.Uplink/downlink resource now can be discharged, it is possible to use after release
Resource quickly access or carry out data transmission for other users.
Second Threshold is the minimum number of the number of times of any one logical channel transmission data in logic channel 3 to 10.
That is, when the logical channel transmission data of any one in logic channel 3 to 10 number of times be more than default Second Threshold, then really
Determine signaling process to terminate.Uplink/downlink resource now can be discharged, it is possible to use the resource after release is quick for other users
Access or carry out data transmission.
First threshold and Second Threshold can be configured based on experience value.It is recommended that first threshold, which is set, is more than 5, the second threshold
Value, which is set, is less than 5., can before business datum arrival or after of short duration transmission DRB to cause during prioritised transmission Stochastic accessing
Release resource is for the business transmission of other users initiation Stochastic accessing or other higher priority as soon as possible.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc. should be included in the protection of the present invention
Within the scope of.
Claims (6)
1. a kind of resource allocation methods of random access signaling flow, it is characterised in that methods described includes：
Base station eNB is closed after random access lead code Msg1 is received according to Msg1 and accidental access response Msg2 resource impact
Tie up to and Msg2 is sent on the DSCH Downlink Shared Channel DL-SCH of corresponding frequency band, Msg2 includes ascending resource distribution mandate, and institute
State ascending resource distribution and authorize continuously effective, authorized until eNB sends ascending resource release；
ENB is received after the 3rd message Msg3, if downlink signaling is transmitted, by physical downlink control channel PDCCH under UE
Row Grant for resource allocation is given, and downlink resource distribution authorizes continuously effective, is awarded until eNB sends downlink resource release
Power；
UE transmits up signaling in ascending resource distribution authorizes corresponding uplink transmission resource, until receiving ascending resource
Release discharges the uplink transmission resource after authorizing；
ENB transmits downlink signaling in downlink resource distribution authorizes corresponding downlink transfer resource, until sending descending money
Source release discharges the downlink transfer resource after authorizing.
2. the method for resource allocation according to claim 1, it is characterised in that when list band is transmitted, the uplink
Resource and the downlink transfer resource are on the same frequency band.
3. the method for resource allocation according to claim 1, it is characterised in that methods described further comprises：It is up/under
Logic channel 1 or the caching of logic channel 2 are more than default first threshold for empty number of times in row resource, then discharge it is described it is up/
Downlink resource.
4. the method for resource allocation according to claim 3, it is characterised in that the first threshold is more than 5.
5. the method for resource allocation according to claim 1, it is characterised in that methods described further comprises：It is up/under
The number of times of any one the logical channel transmission data into logic channel 10 of logic channel 3 is more than default second threshold in row resource
Value, then discharge the uplink/downlink resource.
6. the method for resource allocation according to claim 5, it is characterised in that the Second Threshold is less than 5.
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107018538A (en) * | 2016-01-27 | 2017-08-04 | 普天信息技术有限公司 | A kind of method, base station and user equipment for reducing switching time |
| CN108243510B (en) * | 2016-12-27 | 2020-12-04 | 大唐移动通信设备有限公司 | Method and device for allocating context resources to terminal |
| EP3569029B1 (en) * | 2017-01-13 | 2021-08-04 | Motorola Mobility LLC | Method and apparatus for performing contention based random access in a carrier frequency of a communication network |
| US11425750B2 (en) | 2017-03-22 | 2022-08-23 | Apple Inc. | Timing determination techniques for 5G radio access network cells |
| CN108811162B (en) * | 2017-05-04 | 2020-06-19 | 维沃移动通信有限公司 | System information transmission method, terminal and base station |
| CN114828294A (en) | 2017-09-28 | 2022-07-29 | 中兴通讯股份有限公司 | Search space optimization method and device and storage medium |
| CN108307451B (en) * | 2017-12-29 | 2021-09-03 | 西安抱朴通信科技有限公司 | Method and equipment for user access in long-term evolution small cell system |
| CN116233939A (en) | 2018-02-14 | 2023-06-06 | 上海诺基亚贝尔股份有限公司 | Method and apparatus for prioritized random access during handover |
| CN110198205A (en) | 2018-02-24 | 2019-09-03 | 华为技术有限公司 | The method and apparatus of non-competing random access |
| WO2019191995A1 (en) | 2018-04-04 | 2019-10-10 | 华为技术有限公司 | Method and device for processing information |
| KR102637660B1 (en) | 2018-06-29 | 2024-02-19 | 삼성전자주식회사 | Method and apparatus for transmitting and receiving data in a wireless communication system |
| CN111565459B (en) * | 2019-02-14 | 2023-11-10 | 华为技术有限公司 | Communication method and device |
| CN111278156B (en) * | 2019-03-29 | 2022-02-15 | 维沃移动通信有限公司 | Information transmission method and terminal in random access process |
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| CN102811496A (en) * | 2011-05-31 | 2012-12-05 | 普天信息技术研究院有限公司 | Random access method |
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| WO2009128642A2 (en) * | 2008-04-14 | 2009-10-22 | Lg Electronics Inc. | Method and apparatus for performing random access procedures |
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| CN101483881A (en) * | 2008-01-07 | 2009-07-15 | 华为技术有限公司 | Method and apparatus for controlling uplink resource release by user equipment |
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| CN102811496A (en) * | 2011-05-31 | 2012-12-05 | 普天信息技术研究院有限公司 | Random access method |
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