CN104244430B - Fast dispatch method - Google Patents
Fast dispatch method Download PDFInfo
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- CN104244430B CN104244430B CN201310231337.9A CN201310231337A CN104244430B CN 104244430 B CN104244430 B CN 104244430B CN 201310231337 A CN201310231337 A CN 201310231337A CN 104244430 B CN104244430 B CN 104244430B
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- scheduling request
- request resources
- fast dispatch
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Abstract
This application discloses a kind of fast dispatch method, including:The scheduling request resources for being exclusively used in fast dispatch of this cell are allocated to UE by serving cell in advance；Wherein, the scheduling request resources for being exclusively used in fast dispatch are a scheduling request resources in the 8 × N number of scheduling request resources included per N number of frame, 4≤N≤3+K and N >=M, K is to close the transmission ending signal number for needing continuously to receive during UE fast dispatch frequency resource mandates, M is the neighbor cell number of networking, the scheduling request resources for being exclusively used in fast dispatch of neighbor cell are different in per N number of frame, and the frame that is exclusively used in the scheduling request resources of fast dispatch shared by of the serving cell in two groups of adjacent N number of frames is identical；After UE receives fast dispatch descending open instruction, it is exclusively used in the serving cell of the UE on the scheduling request resources of fast dispatch, sends dispatch request to the base station, base station carries out uplink mandate according to dispatch request to UE.It can avoid dispatching deadlock using the present invention.
Description
Technical field
The present invention relates to mobile communication technology, more particularly to a kind of fast dispatch method.
Background technology
LTE230 systems are a kind of wireless communication system of the suitable private network cluster transmission based on TD-LTE frameworks structure.Should
System has done part orientation optimization for the needs of national grid, can farthest meet the industry of power load monitoring system
Business requires, while provides solid technological accumulation and Applied D emonstration for the planning of national grid next generation network.
Fig. 1 is TD-LTE230 network architecture schematic diagrames.LTE230 system inheriteds OFDM orthogonal multi-sub carrier-wave transmission
In the smaller advantage of the intersymbol interference of unique channel relatively flat and channel, the easy expansion of OFDMA system has innovatively been played
Malleability, frequency selectivity, dispatching flexibility etc., and it is creative absorb the advanced communication theory such as carrier aggregation, frequency spectrum perception,
Constitute low-power consumption of new generation, high spectrum utilization, the flexible multi-business communication system of high reliability.
Dispatch request (Schedule Request) is used to ask uplink shared channel resources to be used to send upstream data institute
With.If UE there are data to reach and do not have ascending resource, trigger a dispatch request and begin listening for PDCCH,
To before distributing the mandate of UL-SCH resources for new data transmission, UE will initiate SR in all resource locations that can initiate SR please
Ask.
In LTE230 systems, for high-priority users, same UE has twice in 1s (equivalent to 40 radio frames)
Chance can send SR；For domestic consumer, once chance can send SR to same UE in 1s.UE terminals for switching and
In the period measured, UE will not initiate dispatch request.
When being transmitted resource distribution, LTE230 systems are divided according to the importance of the priority of user and business
Different user equipmenies is not assigned in different frequencies and be operated.Usual UE resides at a certain frequency, and monitors various
Information, will be in control information corresponding to specified position reception after user receives schedule information.If exist on that frequency
Existing working service, then user will be communicated by fast dispatch to other frequencies, will be unable to listen to original in other frequencies
There is the content for monitoring frequency.
LTE230 systems, the UPpts positions on each subband are assigned to the position of SR requests, lead on this position
Cross cyclic shift and produce 8 Preamble.The characteristics of Preamble is：(1) it is completely orthogonal between sequence, can parallel simultaneously
Send, recipient detects correlated series successively by sequence correlation.(2) after the sequence carries out half cycle displacement, to existing sequence
Row possess certain orthogonality, and after related to other sequences, correlation peak is relatively low.
In order to prevent the interference of adjacent cell, cell can be assigned to a uplink pilot time slot in every 8 25ms frames
(UpPts) SR transmission is carried out, each cell is transmitted in which radio frames and can counted by way of frame number mould 8
Calculate.So, it will imply that 8 25ms frames can be respectively allocated to 8 cells and be scheduled.Each cell uses every 8 25ms
1 frame in frame, the SR resources as this cell.
One SR resource is to combine the resource information limited jointly by time and lead code Preamble, same small
The different terminals in area will distribute different SR resources, substantially be that different Preamble codes are distributed for them, these SR resources will
The UpPts of corresponding same number of frames, but corresponding Preamble codes are different, thus essence be distributed for them it is different
Preamble codes.Due to that can produce 8 mutually orthogonal Preamble as described previously by cyclic shift, therefore a cell exists
There to be 8 SR resources in every 8 25ms frames.So add up 8 cells, in 8 25ms frames, 64 SR resources will be shared.And
In in 1s, equivalent a total of 320 SR resources use for all 8 cells.
In order to improve the utilization rate of resource, the UE of idle condition is avoided to take a certain resource for a long time, LTE230 systems introduce
Terminal discontinuous reception (DRX) mechanism.Under the mechanism, UE with network when carrying out data transmission, it is necessary to first by network pair
It is waken up, and then carries out corresponding data transfer again.The mechanism will specify particular frame for waking up UE, in dormancy
Terminal receive the configured information for wake-up in the particular frame, determine whether itself is waken up according to the configured information, such as
Fruit is not waken up, then stops receiving, into dormancy.If after terminal or base station data end of transmission, transmission is specified number
Transmission ending signal (ending BSR), expression be in closed mode；Recipient receives ending BSR, will know to be in
Finish in state.After ending BSR, which send number, reaches specified quantity, frequency resource mandate that base station will be closed a terminal；Eventually
End the acquiescence for returning to oneself is waited for into frequency.The cycle that current LTE230 systems send wake-up information is that a multi-frame is 40
Wireless frame length (0~39 frame), above-mentioned particular frame are usually the radio frames that frame number is 0 or 20 in a cycle.
When LTE230 systems need to wake up some UE work, and frequency where the UE by other user occupancies when, will
Using fast dispatch mode, simplified signaling flow, by simply specifying another frequency, that is, scheduling is completed.And now UE will
Using the fast dispatch SR resources of cell where its of acquiescence, uplink communication tune is carried out in another specified frequency
Degree.On the fast dispatch SR resources of the acquiescence, current LTE230 systems are specified cell where UE in each multi-frame most
The latter SR resources are as fast dispatch SR resources.Based on this regulation, UE since DRX wake-up states to finally can SR please
Upload is asked, maximum possible continues 38 radio frames.In this way, will have the risk of scheduling deadlock, concrete reason is analyzed as follows：
Due to introducing terminal discontinuous reception (DRX) mechanism, LTE230 systems would not allow for the end in idle condition
End takes a certain resource for a long time, during two of one terminal of fast dispatch shown in table 1 below descending it can be seen that this
One feature.In descending process 1 in table 1, it is DXR DCI information that base station (eNB), which sends information of waking up to UE, in the 1st frame, UE
The information is received in this frame；In the 2nd frame, base station is sent because the frequency of UE normal consistencies is used by other UE to the UE
The descending open instruction of fast dispatch, fast dispatch is carried out to UE to start；In the 3rd frame, UE sends to base station and receives the fast velocity modulation
Spend the ACK information of descending open instruction；In the 4th frame, base station sends data message on PDSCH to UE；In the 5th frame, UE is to base
Stand feeding back ACK information；In 6-9 frames, base station does not also receive any number because no data need to be transferred to UE at UE
According to, and continuously transmit ending BSR to UE, and UE in 6-9 frames due to special SR resources of fast dispatch that it can be used
Have not arrived, therefore, it is impossible to send any data to base station；In the 10th frame, base station is then because the ending BSR continuously transmitted
Specified quantity is reached and has closed UE fast dispatch frequency resource mandate, so that UE is returning to oneself just in the 12nd frame
In the frequency often dispatched.
Table 1
As can be seen here, according to current fast dispatch method, it is possible to occur：Under fast dispatch state, UE can not be sent out
SR is sent to ask, and the frequency of its normal consistency is also using (normal position, because UE is in other frequency, nothing by other UE
Method use), so as to cause to dispatch deadlock, prevent UE from normally being worked.
The content of the invention
In view of this, it is a primary object of the present invention to provide a kind of fast dispatch method, this method can effectively avoid adjusting
The problem of spending deadlock.
In order to achieve the above object, technical scheme proposed by the present invention is：
A kind of fast dispatch method, including：
The scheduling request resources for being exclusively used in fast dispatch of this cell are allocated to by the serving cell of user equipment (UE) in advance
The UE；Wherein, the scheduling request resources for being exclusively used in fast dispatch are the 8 × N number of scheduling request resources included per N number of frame
In a scheduling request resources, 4≤N≤3+K and N >=M, K are that the closing UE fast dispatch frequency resources of systemic presupposition are awarded
The BSR ending information numbers continuously received are temporary needed, M is the neighbor cell number of networking, two two-phases in every N number of frame
The scheduling request resources for being exclusively used in fast dispatch of adjacent cell are different, and the serving cell is special in two groups of adjacent N number of frames
Frame shared by scheduling request resources in fast dispatch is identical；
After the UE receives the fast dispatch descending open instruction of base station transmission, according to the descending unlatching of the fast dispatch
Indicate, be exclusively used in described in the serving cell in the UE on the scheduling request resources of fast dispatch, send and dispatch to the base station
Request, the base station carry out uplink mandate according to the dispatch request to the UE.
In summary, fast dispatch method proposed by the present invention, it is exclusively used in soon by distributing one in every N number of frame for cell
The scheduling request resources of velocity modulation degree so that UE can close its fast dispatch frequency resource by base station under fast dispatch state and award
Before power, carry out data transmission, so as to avoid dispatching deadlock.
Brief description of the drawings
Fig. 1 is TD-LTE230 network architecture schematic diagrames；
Fig. 2 is the schematic flow sheet of the embodiment of the present invention one.
Embodiment
It is right below in conjunction with the accompanying drawings and the specific embodiments to make the object, technical solutions and advantages of the present invention clearer
The present invention is described in further detail.
The present invention core concept be：When setting the special SR resources of fast dispatch of cell, shorten two it is adjacent fast
The interval time of the special SR resources of velocity modulation degree so that before ending BSR have reached specified quantity, the UE that is waken up can be with
Carry out SR requests to upload, in this way it can be ensured that UE will not be special due to no available fast dispatch after entering fast dispatch state
With SR resources, and cause Deadlock occurs.
Fig. 2 is the schematic flow sheet of the embodiment of the present invention one, as shown in Fig. 2 the fast dispatch method of the embodiment is main
Including：
Step 201, the serving cell of user equipment (UE) are in advance by the dispatch request for being exclusively used in fast dispatch of this cell
The UE is given in resource distribution；Wherein, the scheduling request resources for being exclusively used in fast dispatch are the 8 × N number of tune included per N number of frame
A scheduling request resources in degree request resource, 4≤N≤3+K and N >=M, K are the closing UE fast dispatch of systemic presupposition
The transmission ending signal number continuously received is needed during frequency resource mandate, M is the neighbor cell number of networking, per N number of frame
In neighbor cell two-by-two the scheduling request resources for being exclusively used in fast dispatch it is different, the serving cell is in two groups of adjacent N number of frames
In the frame being exclusively used in shared by the scheduling request resources of fast dispatch it is identical.
In this step, the scheduling request resources for being exclusively used in fast dispatch of this cell are allocated to described by serving cell in advance
UE, so that hereafter, as system fast dispatch UE, UE can send SR on the scheduling request resources for be exclusively used in fast dispatch please
Ask.Specific serving cell can be when UE accesses network or UE is in above-mentioned resource distribution when connection status starts business
To UE.
Here, with existing system except that：For a cell, 8 included per N number of frame × N number of dispatch request money
There to be the scheduling request resources that are exclusively used in fast dispatch of the scheduling request resources as the cell in source, 4≤N≤3+K is simultaneously
And N >=M, in addition, the frame that is exclusively used in the scheduling request resources of fast dispatch shared by of the cell in the N number of frame of two adjacent groups
It is identical.In this way, can effectively shorten the interval time of two adjacent scheduling request resources for being exclusively used in fast dispatch, will be somebody's turn to do
Interval is defined to N number of frame, and because K is to close the BSR ending for needing continuously to receive during UE fast dispatch frequency resource mandates
Number, 3+K are that base station wake-up UE closes the mandate of UE fast dispatch frequency resources most to enough BSR ending information is sent
Short time, therefore, by making N≤3+K, make per N number of 25ms frames, cell has a fast dispatch SR resource, so that UE can
Before closing its fast dispatch frequency resource mandate by base station under fast dispatch state, to carry out data transmission, so as to
The problem of avoiding deadlock occurs.
Preferably, when closing the BSR ending information numbers that need continuously to receive during UE fast dispatch frequency resource mandates
For 5 when, the N can be arranged to 7 or 8.
In actual applications, in 8 included per N number of frame × N number of scheduling request resources, one is distributed specially for serving cell
It is one selected in the scheduling request resources from system configuration to the serving cell for the scheduling request resources of fast dispatch
It is individual.With the difference of network system, system may be different to the method for serving cell configuration schedules request resource, such as can be with
Realized using following two methods.
Method one, when system distinguishes different cells using different frames, the 8 × N number of scheduling included per N number of frame please
Ask in resource, frame corresponding to the scheduling request resources that each cell takes is by difference, that is to say, that 8 included per N number of frame ×
In N number of scheduling request resources, the scheduling request resources of the serving cell and the scheduling request resources of the adjacent area of the serving cell
Take different frames.
Preferably, when configure the scheduling request resources of cell using method one, the small of serving cell can be used
Area code mould N value determines the frame that the scheduling request resources of the serving cell take.Accordingly, the serving cell is exclusively used in fast velocity modulation
Frame number corresponding to the scheduling request resources of degree is also the cell id mould N of serving cell value.
Method two, when system distinguishes different cells using different orthogonal sequences, per N number of frame include 8 × it is N number of
In scheduling request resources, the different scheduling request resources in each frame will correspond to different orthogonal sequences respectively, accordingly, these
Scheduling request resources will be allocated to different cells.So, the neighbour of the scheduling request resources of serving cell and the serving cell
The scheduling request resources in area take different orthogonal sequences.
It is preferred that the numbering for the orthogonal sequence that cell id mould N value can be taken as the scheduling request resources of cell.
Accordingly, the numbering for the orthogonal sequence that the scheduling request resources of serving cell take is the cell id mould N of serving cell value.
Preferably, when configure the scheduling request resources of cell using method two, for ease of realizing, can make not
The scheduling request resources for being exclusively used in fast dispatch with cell take identical frame, that is to say, that being exclusively used in for serving cell is fast
The scheduling request resources of velocity modulation degree and the scheduling request resources for being exclusively used in fast dispatch of the adjacent area of the serving cell will take
Identical frame.
Step 202, after the UE receives the fast dispatch descending open instruction of base station transmission, according to the fast dispatch
Descending open instruction, it is exclusively used on the scheduling request resources of fast dispatch described in the serving cell in the UE, to the base station
Dispatch request is sent, the base station carries out uplink mandate according to the dispatch request to the UE.
The specific implementation of this step will not be repeated here compared with system.
In summary, presently preferred embodiments of the present invention is these are only, is not intended to limit the scope of the present invention.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., it should be included in the present invention's
Within protection domain.
Claims (6)
- A kind of 1. fast dispatch method, it is characterised in that including：The scheduling request resources for being exclusively used in fast dispatch of this cell are allocated to described by the serving cell of user equipment (UE) in advance UE；Wherein, the scheduling request resources for being exclusively used in fast dispatch are in the 8 × N number of scheduling request resources included per N number of frame When one scheduling request resources, 4≤N≤3+K and N >=M, K are the closing UE fast dispatch frequency resource mandates of systemic presupposition The transmission ending signal BSR ending numbers continuously received are needed, M is the neighbor cell number of networking, two in per N number of frame The scheduling request resources for being exclusively used in fast dispatch of two neighbor cells are different, and the serving cell is in two groups of adjacent N number of frames The frame being exclusively used in shared by the scheduling request resources of fast dispatch is identical；After the UE receives the fast dispatch descending open instruction of base station transmission, referred to according to the descending unlatching of the fast dispatch Show, be exclusively used in described in the serving cell in the UE on the scheduling request resources of fast dispatch, sending scheduling to the base station please Ask, the base station carries out uplink mandate according to the dispatch request to the UE.
- 2. according to the method for claim 1, it is characterised in that in 8 included per N number of frame × N number of scheduling request resources, The scheduling request resources of the serving cell frame different from the scheduling request resources occupancy of the adjacent area of the serving cell.
- 3. according to the method for claim 1, it is characterised in that in 8 included per N number of frame × N number of scheduling request resources, The serving cell is exclusively used in frame number corresponding to the scheduling request resources of fast dispatch as the cell id mould N's of serving cell Value.
- 4. according to the method for claim 1, it is characterised in that in 8 included per N number of frame × N number of scheduling request resources, The scheduling request resources of the serving cell orthogonal sequence different from the scheduling request resources occupancy of the adjacent area of the serving cell, The scheduling request resources for being exclusively used in fast dispatch of the serving cell are exclusively used in fast dispatch with the adjacent area of the serving cell Scheduling request resources take identical frame.
- 5. according to the method for claim 4, it is characterised in that in 8 included per N number of frame × N number of scheduling request resources, The numbering for the orthogonal sequence that the scheduling request resources of the serving cell take is the cell id mould N of serving cell value.
- 6. according to the method for claim 1, it is characterised in that the N is equal to 7 or 8.
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| CN201310231337.9A CN104244430B (en) | 2013-06-09 | 2013-06-09 | Fast dispatch method |
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| CN104244430B true CN104244430B (en) | 2017-11-24 |
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| CN106856627B (en) * | 2016-12-21 | 2020-05-26 | 国网四川省电力公司眉山供电公司 | SR configuration method suitable for fast scheduling |
| CN108574559B (en) * | 2017-03-13 | 2021-03-30 | 电信科学技术研究院 | Transmission method and device |
| CN107018574B (en) * | 2017-04-28 | 2020-12-25 | 国网浙江省电力公司宁波供电公司 | SR channel of communication system |
| CN110603872B (en) | 2017-05-05 | 2022-08-16 | 中兴通讯股份有限公司 | Method and apparatus for configuring scheduling request |
| CN108494537B (en) * | 2018-02-26 | 2021-03-09 | 北京中电普华信息技术有限公司 | Uplink scheduling request resource allocation method and device applied to rapid scheduling |
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| CN101945401A (en) * | 2009-07-03 | 2011-01-12 | 中兴通讯股份有限公司 | System and method for preventing terminal measuring and scheduling conflict |
| WO2011127435A1 (en) * | 2010-04-08 | 2011-10-13 | Qualcomm Incorporated | Separate resource partitioning management for uplink control and uplink data signals |
| CN102457895A (en) * | 2010-11-01 | 2012-05-16 | 中兴通讯股份有限公司 | Method and device for feeding back BSR (Buffer Status Reports) |
| CN103052095A (en) * | 2011-10-11 | 2013-04-17 | 普天信息技术研究院有限公司 | Spectrum sensing method and system |
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2013
- 2013-06-09 CN CN201310231337.9A patent/CN104244430B/en not_active Expired - Fee Related
Patent Citations (4)
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|---|---|---|---|---|
| CN101945401A (en) * | 2009-07-03 | 2011-01-12 | 中兴通讯股份有限公司 | System and method for preventing terminal measuring and scheduling conflict |
| WO2011127435A1 (en) * | 2010-04-08 | 2011-10-13 | Qualcomm Incorporated | Separate resource partitioning management for uplink control and uplink data signals |
| CN102457895A (en) * | 2010-11-01 | 2012-05-16 | 中兴通讯股份有限公司 | Method and device for feeding back BSR (Buffer Status Reports) |
| CN103052095A (en) * | 2011-10-11 | 2013-04-17 | 普天信息技术研究院有限公司 | Spectrum sensing method and system |
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