CN101677464B - Multiband scheduling system in radio communication network and method thereof - Google Patents
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Abstract
The invention relates to the filed of radio communication, and discloses a multiband scheduling system in radio communication network and method thereof. In the invention, two layers of scheduling mechanisms are used, one layer is band scheduling, the other layer is scheduling between bands, which not only makes full use of multiband with non-continuous band, but also is compatible conventional scheduling function and structure of a single frequency band system, to reduce upgrade cost of the system. The same data packet should integrally schedule the same band.
Description
Technical field
The present invention relates to wireless communication field, particularly the multiband dispatching technique of discontinuous bandwidth.
Background technology
Follow global system for mobile communications (Global System for Mobile communication; Abbreviation " GSM "), code division multiple access (Code Division Multiple Access; Be called for short " CDMA ") wait extensively universal in the past 20 years of mobile network, global voice communication service has obtained great success.At present, the mobile voice user in the whole world has surpassed 1,800,000,000.Simultaneously, our communication custom also evolves to the person to person from the past point-to-point (Place to Place).The fast development of personal communication has impelled greatly that the personal communication devices's is microminiaturized and diversified; In conjunction with the ability of data services such as Multimedia Message, game on line, video request program, music download and mobile TV, satisfied the demand of personal communication and amusement greatly.
Face the huge temptation in the mobile communication market of high speed development; The wireless technology of high bandwidth is fast-developing; Novel wireless network is suggested to provide transmission rate faster, and its typical case's representative is Long Term Evolution (Long Term Evolution is called for short " LTE ") system.The LTE system is third generation partner program (3rd Generation Partnership Project; Abbreviation " 3GPP ") a project; It is the improvement of UMTS (Universal Mobile Telecommunications System is called for short " UMTS ") standard.The target of LTE system comprises the raising spectrum efficiency, reduces cost, promotes service, utilizes new frequency spectrum, merges mutually with other open standard better.The LTE system has used number of patents technology, and for example the patent No. is 11755850,11742847,11741930 etc. United States Patent (USP).
The LTE system is a single band multicarrier system, and for the data flow that different quality requires, system has a scheduler (as shown in Figure 1) on the single carrier.This scheduler is according to the decline situation of wireless channel, the information such as flow on each carrier wave, and the Radio Resource of dispatching patcher reaches the purpose of system function optimization.
Among Fig. 1, scheduler is accomplished the wireless resource scheduling function on this frequency, the data to be transmitted that is input as the upper strata with and the channel quality of quality requirement, base station and terminal measurement, be output as the data allocations and schedule information to the base station physical layer of Radio Resource.
The base station physical layer is accomplished the following signal encoding of network side and the decoding and the demodulation function of modulation function and upward signal; Be input as data allocations and the upstream data and the quality of wireless channel feedback information at scheduling and terminal of the Radio Resource of scheduler; The channel quality that output base station and terminal are measured is to scheduler, and output downlink data and uplink scheduling information are to the terminal.
Decoding and the demodulation and the relevant channel quality measurement function of signal encoding and modulation function, downstream signal accomplish gone up at the terminal; Be input as downlink data and uplink scheduling information, quality of wireless channel feedback information to the base station physical layer of output upstream data and measurement.
For higher transmission rate can be provided, the system that after LTE, continues development need take bigger bandwidth.Yet many frequency bands have been given dissimilar communication systems in the wireless frequency spectrum at present, are difficult to find satisfactory continuous bandwidth.If adopt the multiband transmission plan of discontinuous bandwidth, i.e. continuous transmission signals on several discontinuous bandwidth then.These bandwidth are because frequency difference is very big, so the radio transmission ability also differs greatly, signal transmits performance also has very big difference, are difficult to continue to use the wireless resource scheduling pattern of original LTE system.
Summary of the invention
The object of the present invention is to provide multiband scheduling system and method thereof in a kind of cordless communication network, both made full use of the multiband of discontinuous bandwidth, the compatible again scheduling feature and the structure of existing single-band system.
For solving the problems of the technologies described above, execution mode of the present invention provides multiband scheduling system in a kind of cordless communication network, and this network uses N frequency band of discontinuous bandwidth to carry out the signal transmission, and N is greater than 1, and system comprises:
Scheduling unit between a frequency band is used for the data that needs send are dispatched between each frequency band;
Scheduling unit in N the frequency band, respectively corresponding frequency band is used for the scheduling result according to scheduling unit between frequency band, in pairing frequency band, carries out the scheduling of Radio Resource.
Execution mode of the present invention also provides multiband dispatching method in a kind of cordless communication network, and this network uses N frequency band of discontinuous bandwidth to carry out the signal transmission, and N is greater than 1, and method may further comprise the steps:
Data to needs send are dispatched between each frequency band;
To each frequency band,, in frequency band, carry out the scheduling of Radio Resource according to the scheduling result between frequency band.
Embodiment of the present invention compared with prior art, the main distinction and effect thereof are:
Through using two-layer scheduling mechanism, both made full use of the multiband of discontinuous bandwidth, the compatible again scheduling feature and the structure of existing single-band system reduced the upgrade cost of system.
Further; Same packet should intactly be dispatched to same frequency band; System need not carry out complex processing work such as synchronous between a plurality of frequency bands of discontinuous bandwidth like this, and receiver not be used in a plurality of frequency bands and receives processing, greatly the structure of simplified receiver.
Further, should guarantee the not emission at one time of packet of same user's different frequency bands.Receiver can not need receive at a plurality of discontinuous frequency bands simultaneously like this, has simplified the structure of receiver.
Further, the dispatching algorithm of Radio Resource can be different in each frequency band.Because each frequency band is discontinuous on bandwidth; The bandwidth of each frequency band is likely different; The radio characteristic in each frequency band zone of living on frequency spectrum also possibly be different with disturbed condition; So each frequency band can adopt the wireless resource scheduling algorithm of best results according to the characteristics of this frequency band, and then obtains preferable communication efficiency on the whole.
Description of drawings
Fig. 1 is a LTE single carrier scheduler operation principle sketch map in the prior art;
Fig. 2 is a multiband scheduling system structural representation in the first embodiment of the invention;
Fig. 3 is a scheduling unit structural representation between the first embodiment of the invention midband;
Fig. 4 is a multiband dispatching method schematic flow sheet in the second embodiment of the invention.
Embodiment
In following narration, many ins and outs have been proposed in order to make the reader understand the application better.But, persons of ordinary skill in the art may appreciate that even without these ins and outs with based on the many variations and the modification of following each execution mode, also can realize each claim of the application technical scheme required for protection.
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that execution mode of the present invention is done to describe in detail further below.
First embodiment of the invention relates to multiband scheduling system in a kind of cordless communication network, and this network uses N frequency band of discontinuous bandwidth to carry out the signal transmission, and N is greater than 1.
System configuration is as shown in Figure 2, comprising:
Scheduling unit between a frequency band is used for the data that needs send are dispatched between each frequency band.
Scheduling unit in N the frequency band, respectively corresponding frequency band is used for the scheduling result according to scheduling unit between frequency band, in pairing frequency band, carries out the scheduling of Radio Resource.
Through using two-layer scheduling mechanism, both made full use of the multiband of discontinuous bandwidth, the compatible again scheduling feature and the structure of existing single-band system reduced the upgrade cost of system.
Scheduling unit, single band base station physical layer function can use the technology of corresponding unit in the LTE system in the frequency band among Fig. 2.Terminal among Fig. 2 can be traditional LTE terminal, also can be the new terminal that can multiband receives simultaneously.The terminal that multiband receives simultaneously can receive and launch the signal of a plurality of frequency bands.One or more quality of channel information can be fed back in the terminal.Maybe corresponding a plurality of terminals in the frequency band.
Scheduling unit is when dispatching between frequency band; Same packet should intactly be dispatched to same frequency band; System need not carry out complex processing work such as synchronous between a plurality of frequency bands of discontinuous bandwidth like this; Receiver not be used in a plurality of frequency bands and receives processing, greatly the structure of simplified receiver.Usually only have when certain frequency band has passed certain data flow become unavailable suddenly before or relative other frequency bands of flow very low, just the remainder of this data flow is dispatched to another frequency band and transmits.
In addition, should guarantee the not emission at one time of packet of same user's different frequency bands.Receiver can not need receive at a plurality of discontinuous frequency bands simultaneously like this, has simplified the structure of receiver.
Between frequency band scheduling unit be input as the data of need sending and quality requirement thereof and from the physical layer quality information of each frequency band of scheduling unit in each frequency band.Scheduling unit will be dispatched to the data of each frequency band and the quality requirement of these data and export to scheduling unit in the frequency band corresponding between frequency band.
In an exemplary shown in Figure 3, scheduling unit further comprises between frequency band:
Performance statistic module is used for the physical layer quality information from each frequency band of scheduling unit in each frequency band is added up.The physical layer quality information of each frequency band comprises one of following or its combination in any:
The retransmission rate of the wireless resource utility efficiency that the Block Error Rate of data traffic, corresponding data stream, target working point need, the amount of radio resources that frequency band is corresponding, frequency band correspondence.
The dispatching algorithm module is used for calculating the quality requirement that data with these data of each frequency band are given in scheduling according to the statistics of performance statistic module and the data and the quality requirement thereof of needs transmission.
The dispatching algorithm module adopts one of following algorithm to calculate the quality requirement that data with these data of each frequency band are given in scheduling:
User equilibrium algorithm, quality priority algorithm, time priority algorithm.
The user equilibrium algorithm is meant that same user's different data streams dispatches respectively to different frequency bands, and the overall quality of service that each user is obtained is balanced.
The quality priority algorithm is meant the current available top-quality frequency band of distribution of flows that sends into needs.
The time priority algorithm is meant the current available minimum frequency band of time delay of the distribution of flows of sending into needs.
Certainly, the scheduling between frequency band is not limited to this three kinds of algorithms, and more algorithm can also be arranged.
Scheduling unit can use wireless resource scheduling algorithm in the different frequency bands in each frequency band.Because each frequency band is discontinuous on bandwidth; The bandwidth of each frequency band is likely different; The radio characteristic in each frequency band zone of living on frequency spectrum also possibly be different with disturbed condition; So each frequency band can adopt the wireless resource scheduling algorithm of best results according to the characteristics of this frequency band, and then obtains preferable communication efficiency on the whole.
Certainly scheduling unit also can use same dispatching algorithm in each frequency band.
Be appreciated that; The internal structure of scheduling unit is a kind of logical construction between frequency band, except being divided into performance statistic module and the dispatching algorithm module, other structure can being arranged also; For example at same central processing unit (Central Processing Unit; Be called for short " CPU ") or digital signal processor (Digital SignalProcessor is called for short " DSP ") realize that with form of software and for example the dispatching algorithm module is realized by polyalgorithm submodule and a control submodule; Wherein each algorithm submodule is accomplished a kind of dispatching algorithm, under various conditions, dispatches the different algorithms submodule by the control submodule according to certain strategy and dispatches.
Need to prove; Each unit (or module) of mentioning in each equipment execution mode of the present invention all is a logical block, and physically, a logical block can be a physical location; It also can be the part of a physical location; Can also realize that the physics realization mode of these logical blocks itself is not most important with the combination of a plurality of physical locations, the combination of the function that these logical blocks realized is the key that just solves technical problem proposed by the invention.In addition, for outstanding innovation part of the present invention, above-mentioned each the equipment execution mode of the present invention will not introduced with solving the not too close unit of technical problem relation proposed by the invention, and this does not show that there is not other unit in the said equipment execution mode.
Second embodiment of the invention relates to multiband dispatching method in a kind of cordless communication network, and this network uses N frequency band of discontinuous bandwidth to carry out the signal transmission, and N is greater than 1.
The flow process of this execution mode is as shown in Figure 4, may further comprise the steps:
In step 401, the physical layer quality information of each frequency band is added up, obtain statistics.
After this get into step 402, data and quality requirement thereof according to statistics and needs transmission calculate the quality requirement that data with these data of each frequency band are given in scheduling.
Above-mentioned steps 401 and 402 is promptly dispatched between each frequency band the data that needs send.When dispatching between frequency band, the data of sending as required and the physical layer quality information of quality requirement and each frequency band thereof are dispatched, and scheduling result is to distribute to the quality requirement of data He these data of each frequency band.When between frequency band, dispatching, same in principle packet should intactly be dispatched to same frequency band.Also should guarantee the emission at one time of packet of same user's different frequency bands when dispatching between frequency band.Receiver can not need receive at a plurality of discontinuous frequency bands simultaneously like this, has simplified the structure of receiver.
After this get into step 403,,, in frequency band, carry out the scheduling of Radio Resource according to the scheduling result between frequency band to each frequency band.
This execution mode is and the corresponding method execution mode of first execution mode, this execution mode can with the enforcement of working in coordination of first execution mode.The correlation technique details of mentioning in first execution mode is still effective in this execution mode, in order to reduce repetition, repeats no more here.Correspondingly, the correlation technique details of mentioning in this execution mode also can be applicable in first execution mode.
Method execution mode of the present invention can be realized with software, hardware, firmware or the like mode.No matter the present invention be with software, hardware, or the firmware mode realize; Instruction code can be stored in the memory of computer-accessible of any kind (for example permanent or revisable; Volatibility or non-volatile; Solid-state or non-solid-state, medium fixing or that change or the like).Equally; Memory can for example be programmable logic array (Programmable Array Logic; Abbreviation " PAL "), random access memory (Random Access Memory; Abbreviation " RAM "), programmable read only memory (Programmable Read Only Memory is called for short " PROM "), read-only memory (Read-Only Memory is called for short " ROM "), Electrically Erasable Read Only Memory (Electrically Erasable Programmable ROM; Abbreviation " EEPROM "), disk, CD, digital versatile disc (Digital Versatile Disc is called for short " DVD ") or the like.
Though through reference some preferred implementation of the present invention; The present invention is illustrated and describes; But those of ordinary skill in the art should be understood that and can do various changes to it in form with on the details, and without departing from the spirit and scope of the present invention.
Claims (12)
1. multiband scheduling system in the cordless communication network, this network uses N frequency band of discontinuous bandwidth to carry out the signal transmission, and N is characterized in that greater than 1 said system comprises:
Scheduling unit between a frequency band is used for the data that needs send are dispatched between each frequency band;
Scheduling unit in N the frequency band, respectively corresponding frequency band is used for the scheduling result according to scheduling unit between said frequency band, in pairing frequency band, carries out the scheduling of Radio Resource;
Scheduling unit uses wireless resource scheduling algorithm in the different frequency bands in each said frequency band.
2. multiband scheduling system in the cordless communication network according to claim 1 is characterized in that, scheduling unit is when dispatching between said frequency band, and same packet should intactly be dispatched to same frequency band.
3. multiband scheduling system in the cordless communication network according to claim 2 is characterized in that, scheduling unit guarantees the not emission at one time of packet of same user's different frequency bands between said frequency band when dispatching.
4. multiband scheduling system in the cordless communication network according to claim 3; It is characterized in that, between said frequency band scheduling unit be input as the data of need sending and quality requirement thereof and from the physical layer quality information of each frequency band of scheduling unit in each said frequency band;
Scheduling unit will be dispatched to the data of each frequency band and the quality requirement of these data and export to scheduling unit in the frequency band corresponding between said frequency band.
5. multiband scheduling system in the cordless communication network according to claim 4 is characterized in that, scheduling unit further comprises between said frequency band:
Performance statistic module is used for adding up from the physical layer quality information of each frequency band of scheduling unit in each said frequency band;
The dispatching algorithm module is used for calculating the quality requirement that data with these data of each frequency band are given in scheduling according to the statistics of said performance statistic module and the data and the quality requirement thereof of needs transmission.
6. multiband scheduling system in the cordless communication network according to claim 5 is characterized in that, the physical layer quality information of said each frequency band comprises one of following or its combination in any:
The retransmission rate of the wireless resource utility efficiency that the Block Error Rate of data traffic, corresponding data stream, target working point need, the amount of radio resources that frequency band is corresponding, frequency band correspondence.
7. multiband scheduling system in the cordless communication network according to claim 5 is characterized in that, said dispatching algorithm module adopts one of following algorithm to calculate the quality requirement that data with these data of each frequency band are given in scheduling:
User equilibrium algorithm, quality priority algorithm, time priority algorithm.
8. multiband dispatching method in the cordless communication network, this network uses N frequency band of discontinuous bandwidth to carry out the signal transmission, and N is characterized in that greater than 1, said method comprising the steps of:
Data to needs send are dispatched between each frequency band;
To each frequency band, according to the scheduling result between frequency band, in frequency band, carry out the scheduling of Radio Resource, wherein each frequency band is used wireless resource scheduling algorithm in the different frequency bands.
9. multiband dispatching method in the cordless communication network according to claim 8 is characterized in that, in the said step of between each frequency band, dispatching, same packet should intactly be dispatched to same frequency band.
10. multiband dispatching method in the cordless communication network according to claim 9 is characterized in that, in the said step of between each frequency band, dispatching, guarantees the not emission at one time of packet of same user's different frequency bands.
11. multiband dispatching method in the cordless communication network according to claim 10; It is characterized in that; In the said step of between each frequency band, dispatching; The data of sending as required and the physical layer quality information of quality requirement and each frequency band thereof are dispatched, and scheduling result is to distribute to the quality requirement of data He these data of each frequency band.
12. the multiband dispatching method is characterized in that in the cordless communication network according to claim 11, said step of between each frequency band, dispatching comprises following substep:
Physical layer quality information to each frequency band is added up, and obtains statistics;
Data and quality requirement thereof according to said statistics and needs transmission calculate the quality requirement that data with these data of each frequency band are given in scheduling.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1753343A (en) * | 2004-09-22 | 2006-03-29 | 株式会社Ntt都科摩 | Multi-band mobile communication system and transmitter |
| CN1812286A (en) * | 2005-01-27 | 2006-08-02 | 朗迅科技公司 | Balancing load of cells in inter-frequency handover in multi-band cellular communication networks |
| CN101047943A (en) * | 2006-03-30 | 2007-10-03 | 富士通株式会社 | Communication apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1753343A (en) * | 2004-09-22 | 2006-03-29 | 株式会社Ntt都科摩 | Multi-band mobile communication system and transmitter |
| CN1812286A (en) * | 2005-01-27 | 2006-08-02 | 朗迅科技公司 | Balancing load of cells in inter-frequency handover in multi-band cellular communication networks |
| CN101047943A (en) * | 2006-03-30 | 2007-10-03 | 富士通株式会社 | Communication apparatus |
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