CN101345578A - Resource scheduling method of TDD radio communication system - Google Patents
Resource scheduling method of TDD radio communication system Download PDFInfo
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- CN101345578A CN101345578A CNA200810142057XA CN200810142057A CN101345578A CN 101345578 A CN101345578 A CN 101345578A CN A200810142057X A CNA200810142057X A CN A200810142057XA CN 200810142057 A CN200810142057 A CN 200810142057A CN 101345578 A CN101345578 A CN 101345578A
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Abstract
The invention discloses a resource scheduling method for time division duplex radio communication system characterized in that when uplink or downlink resource is allocated, last physical resource block of downlink transmission block, or/ and physical resource block of uplink transmission block is only allocated to terminal near to present base station and not allocated to cell border terminal, or only allocated to terminal of few relay hop and not allocated to terminal of more relay hop. Equal FL to RL Guard Time can still be used when cell diameter or relay hop number is different, which avoids asynchronization of uplink and downlink of adjacent cell and is suitable for resource scheduling of TDD radio communication system.
Description
Technical field
The present invention relates to wireless communication system, relate in particular to the resource regulating method of a kind of TDD (Time Division Duplex, time division duplex) wireless communication system.
Background technology
Present UMB (Ultra Mobile Broadband, super mobile broadband), LTE (Long-Term Evolution, Long Term Evolution), Wimax (Worldwide Interoperabilityfoy Microwave Access, micro-wave access to global intercommunication) all there are two kinds of duplex mode: FDD (Frequency Division Duplex, Frequency Division Duplexing (FDD)) and TDD in system.
The FDD mode is that uplink downlink adopts different frequency band transmission, and the resource allocation of the PHYFrames of system's up-downgoing is relatively independent like this.
The TDD mode is that uplink downlink uses identical frequency range timesharing to transmit.Down link is transformed into certain time interval between the up link, be referred to as here: FL (ForwardLink) → RL (Reverse Link) Guard Time.The transmission of this time interval and radio-frequency apparatus and receive between time of conversion relevant, also relevant with the radius of sub-district.
Suppose that the base station constantly sends data to the cell boarder terminal by down link at t0, electromagnetic wave propagates into this terminal from the base station need regular hour t1, then this terminal just receives the data that the base station sends over constantly at t0+t1, the radio-frequency apparatus of supposing terminal is transformed into transmit status from receive status needs time t2, after then this terminal receives the data of base station, to constantly just can send data to the base station at t0+t1+t2 the soonest, suppose that electromagnetic wave propagates into the base station from this terminal and needs regular hour t3, then the base station just receives the data that terminal sends over constantly to t0+t1+t2+t3.From the base station, down link is t1+t2+t3 just to the interval between the up link, and wherein t1, t3 and base station are to the distance dependent of terminal, and also promptly relevant with radius of society, radius of society is big more, and then t1, t3 are just big more.Therefore, radius of society is big more, and FL (Forward Link) → RL (Reverse Link) Guard Time just needs big more.
When the radius size of neighbor cell is inequality, then the FL of neighbor cell → RL Guard Time is also with unequal, to cause the uplink downlink of neighbor cell asynchronous like this, the physical resource of the uplink downlink of neighbor cell is overlapped, and then cause the interference problem between uplink downlink between neighbor cell.Therefore, how solving this problem, is the starting point of this paper.
Another kind of scene, in the system that Relay (relay) arranged, the relaying number of general Relay is many more can to cause longer time delay, and the difference of Relay relaying jumping figure is also different to the size requirement of FL (Forward Link) → RL (Reverse Link) Guard Time like this.
Thereby prior art awaits to improve and improve.
Summary of the invention
The object of the present invention is to provide a kind of resource regulating method of TDD radio communication system, make under the different situation of the radius size difference of neighbor cell or Relay relaying jumping figure, do not disturb between the uplink downlink of neighbor cell, to the not influence of size requirement of FL → RL Guard Time, still can use equal FL → RL Guard Time.
Technical scheme of the present invention comprises:
A kind of resource regulating method of TDD radio communication system, it comprises that the base station gives the following steps in the terminal transmission data procedures:
A1, allocation of downlink resource, and tell terminal with the resource information of distributing; Wherein the process of allocation of downlink resource is: system distributes to part terminal under the base station with the last Physical Resource Block of down link transmission block in scheduling of resource; Described last Physical Resource Block is meant, from the angle of time domain, and the Physical Resource Block of the most close back one uplink transport blocks in downlink transmission block;
The transmitted over resources that B1, data are being distributed;
C1, terminal demodulating data on the resource of distributing.
Described method, wherein: in the described steps A 1 the last Physical Resource Block of down link transmission block distributed to that the process of part terminal specifically comprises under the base station: distribute to the terminal near, do not distribute to the terminal of cell boarder from this base station.
Described method, wherein: distinguish the described terminal near and the terminal procedures of cell boarder and comprise from this base station:
Preestablish a thresholding,, think that then this terminal is the terminal near from the base station when the distance of terminal and base station during less than this thresholding; When the distance of terminal and base station during, think that then this terminal is the terminal of cell boarder greater than this thresholding.
Described method, wherein: in the described steps A 1 the last Physical Resource Block of down link transmission block distributed to that the process of part terminal specifically comprises under the base station:
In the system of relay is arranged, the last Physical Resource Block of downlink transmission block is only distributed to the terminal of relay relaying jumping figure value less than predetermined threshold, do not distribute to the terminal of relay relaying jumping figure value greater than predetermined threshold.
Described method, wherein: the last Physical Resource Block of distributing to nearly base station terminal downlink transmission block adopts lower powered transmission means transmission data.
A kind of resource regulating method of TDD radio communication system, it comprises that terminal gives the following steps of base station transmits data procedures:
A2, base station assigns uplink resource, and tell terminal with the resource information of distributing; Wherein distribute the process of uplink resource to be: system distributes to part terminal under the base station with the most preceding Physical Resource Block of uplink transport blocks in scheduling of resource; The most preceding described Physical Resource Block is meant, from the angle of time domain, and the Physical Resource Block of the most close last downlink transmission block in uplink transport blocks;
The transmitted over resources that B2, data are being distributed;
C2, base station demodulating data on the resource of distributing.
Described method, wherein: in the described steps A 2 the most preceding Physical Resource Block of up link transmission block distributed to that the process of part terminal comprises under the base station: distribute to the terminal near, do not distribute to the terminal of cell boarder from this base station.
Described method, wherein:: the process of distinguishing the terminal of described terminal near from this base station and cell boarder comprises:
Preestablish a thresholding,, think that then this terminal is the terminal near from the base station when the distance of terminal and base station during less than this thresholding; When the distance of terminal and base station during, think that then this terminal is the terminal of cell boarder greater than this thresholding.
Described method, wherein: in the described steps A 2 the most preceding Physical Resource Block of up link transmission block distributed to that the process of part terminal specifically also comprises under the base station:
In the system of relay is arranged, the most preceding Physical Resource Block of uplink transport blocks is only distributed to the terminal of relay relaying jumping figure value less than predetermined threshold, do not distribute to the terminal of relay relaying jumping figure value greater than predetermined threshold.
Described method, wherein: the most preceding Physical Resource Block of distributing to the uplink transport blocks of nearly base station terminal adopts lower powered transmission means transmission data.
The present invention sets about from the angle of scheduling of resource, two kinds of technical schemes are provided, make when the radius size of sub-district is inequality, perhaps Relay relaying jumping figure is not simultaneously, still can use equal FL → RLGuard Time, so just avoid the nonsynchronous problem of radius size the uplink downlink unequal or neighbor cell that the relaying jumping figure is different.
Description of drawings
Fig. 1 is the schematic diagram of embodiment of the invention dispatching down link resource;
Fig. 2 is the schematic diagram of embodiment of the invention dispatching down link resource;
Fig. 3 is the schematic diagram of embodiment of the invention uplink resource scheduling;
Fig. 4 is the schematic diagram of embodiment of the invention uplink resource scheduling.
Embodiment
Below in conjunction with the accompanying drawing specific embodiment technical scheme of the present invention is elaborated.
In the resource regulating method of TDD radio communication system of the present invention, the base station is given before the terminal transmission data, and the first step will be distributed forward link resources earlier, and tells terminal with the resource information of distributing; The transmitted over resources that second step data is distributing; The 3rd step terminal demodulating data on the resource of distributing.
In like manner, terminal is given before the base station transmits data, and first step base station is distributed reverse link resources earlier, and tells terminal with the resource information of distributing; The transmitted over resources that second step data is distributing; The 3rd step base station demodulating data on the resource of distributing.The core invention of the resource regulating method of TDD radio communication system of the present invention belongs to the content of first step resource allocation aspect.
As depicted in figs. 1 and 2, schematic diagram for the dispatching down link resource of the embodiment of the invention, the up-downgoing transmission block is to become example by four physical frame groups to describe in the present embodiment, and for the situation that the up-downgoing transmission block is made up of the physical frame of other number, content of the present invention is suitable for equally.
Among Fig. 1, t1 represent signal from base station transmits to the needed time of cell boarder terminal, t2 represent signal from the cell boarder terminal transmission to the base station the needed time.Tb represents that the base station is transformed into the transmission needed time of downlink transmission mode from receiving the uplink mode, and Ta is illustrated in the time interval between base station down transmission means and the uplink mode.
The radio-frequency apparatus of supposing terminal is transformed into transmit status from accepting state needs time t3, then in general, and Ta 〉=t1+t2+t3.
Preestablish thresholding R, when this cell terminal during less than thresholding R, thinks then that this terminal is nearly base station terminal from the distance of base station, when cell terminal during greater than thresholding R, thinks then that this terminal is the cell boarder terminal from the distance of base station.
System only distributes to nearly base station terminal with the last Physical Resource Block of downlink transmission block in scheduling of resource, do not distribute to the cell boarder terminal.
Last Physical Resource Block is meant that part of Physical Resource Block of the most close ensuing uplink transport blocks in downlink transmission block; This last Physical Resource Block can be a physical resource unit, also can comprise a plurality of physical resource unit; Physical resource unit can be frequency domain resource, time-domain resource or time domain frequency domain two dimension resource.
Among Fig. 1, given nearly base station terminal with the resource allocation of last physical frame of downlink transmission block, the position of this physical frame resource marks with the oblique line pattern in Fig. 1, and this physical frame has comprised a plurality of physical resource unit.And be not last physical resource of downlink transmission block with the physical frame that the wave pattern marks, therefore can give the cell boarder terminal.
In Fig. 2, given nearly base station terminal with the last resource allocation of last physical frame of downlink transmission block, the position of this last resource marks with the oblique line pattern in Fig. 2, and this resource can be a physical resource unit, also can comprise a plurality of physical resource unit.And be not the last physical resource of downlink transmission block with that part of resource that the wave pattern marks, therefore can give the cell boarder terminal.
Because nearly base station terminal is closer from this base station, signal to noise ratio is relatively good, can adopt lower powered method transmission data so distribute to the last Physical Resource Block of the downlink transmission block of nearly base station terminal.
Because nearly base station terminal is closer from this base station, and the last Physical Resource Block of downlink transmission block is only distributed to from the near terminal in this base station.Even the radius of sub-district has increased, FL originally → RL GuardTime also can satisfy the needs of the up-downgoing transmission of nearly base station terminal, does not need to increase the value of FL → RLGuard Time.Promptly in Fig. 1 and Fig. 2, even the radius of sub-district has increased, the time interval Ta between downlink transmission mode and the uplink mode does not need to increase yet yet.
Therefore adopt this technical scheme, make the radius size of sub-district under situation inequality, still can use equal FL → RL Guard Time, so just avoided the nonsynchronous problem of uplink downlink of the unequal neighbor cell of radius size.Simultaneously, the last Physical Resource Block of downlink transmission block adopts lower powered transmission method can also avoid the down link signal of this base station that the adjacent base station uplink signal is disturbed.
In the system that Relay (relay) arranged, the relaying number of general Relay is many more can to cause longer time delay, and the difference of Relay relaying jumping figure is also different to the size requirement of FL (Forward Link) → RL (ReverseLink) Guard Time like this.Adopt method of the present invention, the last Physical Resource Block of downlink transmission block is only distributed to the terminal of relay relaying jumping figure value less than predetermined threshold, do not distribute to the terminal of relay relaying jumping figure value greater than predetermined threshold.The predetermined threshold here is according to the relay transmission delay value of each relay station the influence of the size requirement of FL → RL Guard Time to be calculated to determine.Like this, even relay relaying jumping figure has increased, FL originally → RL Guard Time also can satisfy the needs of the up-downgoing transmission of the less terminal of relaying jumping figure, does not need to increase the value of FL → RL GuardTime.Therefore, under the different situation of Relay relaying jumping figure, to the not influence of size requirement of FL → RL Guard Time.
As shown in Figure 3 and Figure 4, the schematic diagram of dispatching for the uplink resource of the embodiment of the invention.The up-downgoing transmission block is to become example by four physical frame groups to describe in the present embodiment, and for the situation that the up-downgoing transmission block is made up of the physical frame of other number, content of the present invention is suitable for equally.
Among Fig. 3 and Fig. 4, t2, Ta, parameters such as Tb are identical with the meaning of Fig. 1, repeat no more here.
System only distributes to the most preceding Physical Resource Block of uplink transport blocks from the near terminal in this base station in scheduling of resource, does not distribute to the terminal of cell boarder.
The most preceding Physical Resource Block is meant that part of Physical Resource Block of the most close front downlink transmission block in uplink transport blocks; This most preceding Physical Resource Block can be a physical resource unit, also can comprise a plurality of physical resource unit; Physical resource unit can be frequency domain resource, time-domain resource or time domain frequency domain two dimension resource.
Among Fig. 3, given nearly base station terminal with the resource allocation of previous physical frame of uplink transport blocks, the position of this physical frame resource marks with the oblique line pattern in Fig. 3, and this physical frame has comprised a plurality of physical resource unit.And be not the most previous physical frame resource of uplink transport blocks with the physical frame that the wave pattern marks, therefore can distribute to the cell boarder terminal.
In Fig. 4, with uplink transport blocks the most preceding resource allocation of previous physical frame given nearly base station terminal, this marks with the oblique line pattern in Fig. 4 position of preceding resource, and this resource can be a physical resource unit, also can comprise a plurality of physical resource unit.And be not the most preceding physical resource of uplink transport blocks with that part of resource that the wave pattern marks, therefore can give the cell boarder terminal.
Because nearly base station terminal is closer from this base station, the most preceding Physical Resource Block of uplink transport blocks is only distributed to from the near terminal in this base station, even the radius of sub-district has increased, FL originally → RL GuardTime also can satisfy the needs of the up-downgoing transmission of nearly base station terminal, does not need to increase the value of FL → RLGuard Time.Promptly in Fig. 3 and Fig. 4, even the radius of sub-district has increased, the time interval Ta between downlink transmission mode and the uplink mode does not need to increase yet yet.
Therefore adopt this technical scheme, make the radius size of sub-district under situation inequality, still can use equal FL → RL Guard Time, so just avoided the asynchronous problem of uplink downlink of the unequal neighbor cell of radius size.
Ditto described, in the system of relay is arranged, the most preceding Physical Resource Block of uplink transport blocks is only distributed to the terminal of relay relaying jumping figure value less than predetermined threshold, do not distribute to the terminal of relay relaying jumping figure value greater than predetermined threshold.Can reach equally and realize relay relaying jumping figure difference, still can use the purpose of equal FL → RL Guard Time.
Should be understood that the above only is embodiment of the present invention, above-mentioned description at specific embodiment is comparatively detailed, can not therefore think the restriction to scope of patent protection of the present invention; For a person skilled in the art; the present invention can have various changes and variation; within the spirit and principles in the present invention all; any modification of being done, be equal to replacement, improvement etc.; all should be included within the claim scope of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (10)
1, a kind of resource regulating method of TDD radio communication system, it comprises that the base station gives the following steps in the terminal transmission data procedures:
A1, allocation of downlink resource, and tell terminal with the resource information of distributing; Wherein the process of allocation of downlink resource is: system distributes to part terminal under the base station with the last Physical Resource Block of down link transmission block in scheduling of resource; Described last Physical Resource Block is meant, from the angle of time domain, and the Physical Resource Block of the most close back one uplink transport blocks in downlink transmission block;
The transmitted over resources that B1, data are being distributed;
C1, terminal demodulating data on the resource of distributing.
2, the method for claim 1, it is characterized in that: in the described steps A 1 the last Physical Resource Block of down link transmission block distributed to that the process of part terminal specifically comprises under the base station: distribute to the terminal near, do not distribute to the terminal of cell boarder from this base station.
3, method as claimed in claim 2 is characterized in that: distinguish the described terminal near from this base station and the terminal procedures of cell boarder and comprise:
Preestablish a thresholding,, think that then this terminal is the terminal near from the base station when the distance of terminal and base station during less than this thresholding; When the distance of terminal and base station during, think that then this terminal is the terminal of cell boarder greater than this thresholding.
4, the method for claim 1 is characterized in that, in the described steps A 1 the last Physical Resource Block of down link transmission block is distributed to that the process of part terminal specifically comprises under the base station:
In the system of relay is arranged, the last Physical Resource Block of downlink transmission block is only distributed to the terminal of relay relaying jumping figure value less than predetermined threshold, do not distribute to the terminal of relay relaying jumping figure value greater than predetermined threshold.
5, the method for claim 1 is characterized in that: the last Physical Resource Block of distributing to nearly base station terminal downlink transmission block adopts lower powered transmission means transmission data.
6, a kind of resource regulating method of TDD radio communication system, it comprises that terminal gives the following steps of base station transmits data procedures:
A2, base station assigns uplink resource, and tell terminal with the resource information of distributing; Wherein distribute the process of uplink resource to be: system distributes to part terminal under the base station with the most preceding Physical Resource Block of uplink transport blocks in scheduling of resource; The most preceding described Physical Resource Block is meant, from the angle of time domain, and the Physical Resource Block of the most close last downlink transmission block in uplink transport blocks;
The transmitted over resources that B2, data are being distributed;
C2, base station demodulating data on the resource of distributing.
7, method as claimed in claim 6, it is characterized in that: in the described steps A 2 the most preceding Physical Resource Block of up link transmission block distributed to that the process of part terminal comprises under the base station: distribute to the terminal near, do not distribute to the terminal of cell boarder from this base station.
8, method as claimed in claim 7 is characterized in that: the process of distinguishing the terminal of described terminal near from this base station and cell boarder comprises:
Preestablish a thresholding,, think that then this terminal is the terminal near from the base station when the distance of terminal and base station during less than this thresholding; When the distance of terminal and base station during, think that then this terminal is the terminal of cell boarder greater than this thresholding.
9, method as claimed in claim 6 is characterized in that, in the described steps A 2 the most preceding Physical Resource Block of up link transmission block is distributed to that the process of part terminal specifically also comprises under the base station:
In the system of relay is arranged, the most preceding Physical Resource Block of uplink transport blocks is only distributed to the terminal of relay relaying jumping figure value less than predetermined threshold, do not distribute to the terminal of relay relaying jumping figure value greater than predetermined threshold.
10, method as claimed in claim 6 is characterized in that: the most preceding Physical Resource Block of distributing to the uplink transport blocks of nearly base station terminal adopts lower powered transmission means transmission data.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810142057A CN101345578B (en) | 2008-08-20 | 2008-08-20 | Resource scheduling method of TDD radio communication system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810142057A CN101345578B (en) | 2008-08-20 | 2008-08-20 | Resource scheduling method of TDD radio communication system |
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| CN101345578A true CN101345578A (en) | 2009-01-14 |
| CN101345578B CN101345578B (en) | 2012-09-05 |
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| CN200810142057A Expired - Fee Related CN101345578B (en) | 2008-08-20 | 2008-08-20 | Resource scheduling method of TDD radio communication system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997600A (en) * | 2009-08-27 | 2011-03-30 | 上海贝尔股份有限公司 | Method and base station for shortening guard time interval in mobile communication system |
| CN102014498A (en) * | 2010-09-19 | 2011-04-13 | 电子科技大学 | Transmission method based on two-hop relay station wireless communication |
| WO2011162656A1 (en) * | 2010-06-24 | 2011-12-29 | Telefonaktiebolaget Lm Eriksson (Publ) | Timeslot allocation method in a wireless tdd network |
| CN104640224A (en) * | 2013-11-12 | 2015-05-20 | 华为技术有限公司 | Network data transmission method, device and system |
| CN108901072A (en) * | 2012-06-27 | 2018-11-27 | 索尼公司 | Communication control unit, communication control method and communication device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100492942C (en) * | 2003-04-07 | 2009-05-27 | 华为技术有限公司 | Method for transmission of down common control information in tme-division duplex system |
| CN1798444A (en) * | 2004-12-29 | 2006-07-05 | 北京三星通信技术研究有限公司 | Method for transmitting down going scheduling information in use for time division duplexing system in low rate |
-
2008
- 2008-08-20 CN CN200810142057A patent/CN101345578B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997600A (en) * | 2009-08-27 | 2011-03-30 | 上海贝尔股份有限公司 | Method and base station for shortening guard time interval in mobile communication system |
| CN101997600B (en) * | 2009-08-27 | 2014-02-19 | 上海贝尔股份有限公司 | Method and base station for shortening guard time interval in mobile communication system |
| WO2011162656A1 (en) * | 2010-06-24 | 2011-12-29 | Telefonaktiebolaget Lm Eriksson (Publ) | Timeslot allocation method in a wireless tdd network |
| US8837335B2 (en) | 2010-06-24 | 2014-09-16 | Telefonaktiebolaget L M Ericsson (Publ) | Timeslot allocation method in a wireless TDD network |
| CN102014498A (en) * | 2010-09-19 | 2011-04-13 | 电子科技大学 | Transmission method based on two-hop relay station wireless communication |
| CN102014498B (en) * | 2010-09-19 | 2013-04-03 | 电子科技大学 | Transmission method based on two-hop relay station wireless communication |
| CN108901072A (en) * | 2012-06-27 | 2018-11-27 | 索尼公司 | Communication control unit, communication control method and communication device |
| CN108901072B (en) * | 2012-06-27 | 2023-05-12 | 索尼公司 | Communication control device, communication control method, and communication device |
| CN104640224A (en) * | 2013-11-12 | 2015-05-20 | 华为技术有限公司 | Network data transmission method, device and system |
| WO2015070625A1 (en) * | 2013-11-12 | 2015-05-21 | 华为技术有限公司 | Network data transmission method, apparatus, and system |
| CN104640224B (en) * | 2013-11-12 | 2018-06-19 | 华为技术有限公司 | A kind of network data transmission method, apparatus and system |
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| CN101345578B (en) | 2012-09-05 |
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