CN101232359A - Communicating method and device of TDD mode - Google Patents
Communicating method and device of TDD mode Download PDFInfo
- Publication number
- CN101232359A CN101232359A CNA2007101277844A CN200710127784A CN101232359A CN 101232359 A CN101232359 A CN 101232359A CN A2007101277844 A CNA2007101277844 A CN A2007101277844A CN 200710127784 A CN200710127784 A CN 200710127784A CN 101232359 A CN101232359 A CN 101232359A
- Authority
- CN
- China
- Prior art keywords
- time slot
- interval
- protection
- time
- descending
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a communication method in a time division duplex mode, the embodiment of the invention provides the communication method in the time division duplex mode, comprising that: a sub-frame in a wireless frame is transmitted, the sub-frame comprises a plurality of time slots; data is transmitted between two downlink time slots which are adjacent to a protection interval; the data is transmitted in the time slots after the protection interval, the time slots after the protection interval are configured as uplink time slots and/or downlink time slots. The invention further discloses a communication device in the time division duplex mode. The coexistence with a time division multiple access system can be realized in the transmission process of the sub-frame of the wireless frame according to the technical proposal provided by method.
Description
Technical field
The present invention relates to wireless communication field, particularly a kind of time division duplex (Time Division Duplex, TDD) communication means in the pattern and communicator.
Background technology
In the communications field, the TDD communication pattern is a kind of pattern of carrying out wireless transmission in wireless channel, this pattern repeats time division multiple access (Time Division-SynchronousCode Division Multiple Access, TD-SCDMA) frame structure realization by carry out periodicity in time domain.Under tdd mode, transmitting and receiving of data is that timesharing is carried out, and the up-downgoing channel can time division multiplexing, can work on the frequency range of image frequency not having.
Consult Fig. 1, prior art third generation collaborative project (3rd Generation Partnership Project, 3GPP) the 36.211 frame structure schematic diagrames that proposed a kind of TDD system.Described frame structure adopts the wireless frame structure of 10ms, has comprised 2 identical 5ms subframes.In each 5ms subframe; comprise 4 descending time slot (Time Slot; TS) 0,4,5,6; 3 ascending time slots 1,2,3; 1 descending/103,1 up/106,1 descending pilot frequency time slot 102 of down conversion point (UDSP) of up transfer point (DUSP); 1 uplink pilot time slot 105 and protection interval (GP, a Guard Period) 104.On each/slot time 101 is all arranged between the descending time slot.Described descending/up switching point 103 is arranged on down link and is converted between the up link, between descending time slot 0 and ascending time slot 1, specifically is between descending pilot frequency time slot 102 and GP104 promptly.Described up/descending switching point 106 is arranged between ascending time slot 3 and the descending time slot 4.
Wherein, descending pilot frequency time slot 102 follows descending time slot 0 back closely, is used for transmitting down-going synchronous information.Uplink pilot time slot 105 protection at interval 104 and ascending time slot 1 between, be used for the transmission user random access sequence, also be that transmission user inserts request at random to realize user's access communications network.Whether described uplink pilot time slot 105 information transmitted can influence the user can enjoy service by access network, therefore guarantees that the accurate transmission of these information is prerequisites of cordless communication network operate as normal.Descending/ascending time slot is used for transmitting other data messages.The protection of descending pilot frequency time slot 102 back 104 is used for providing protection at interval for downlinking to the uplink conversion at interval.
Shown among Fig. 1, after finishing descending time slot 0, up through transferring to behind descending/up switching point 103.After finishing ascending time slot 1 to 3, through up/descending switching point 106 transfers to descending.104 backs are followed by uplink pilot time slot 105 at interval in protection wherein, and prior art is utilized the time slot 1 of uplink pilot time slot 105 and its back to transmit the user and inserted request at random.
Along with development of Communication Technique, the mode of utilizing the frame structure that proposes in the prior art to communicate can not satisfy new requirement.
Summary of the invention
Embodiments of the invention have proposed communication means and the communicator in a kind of TDD mode, and can realize the coexistence of systems with TD-SCDMA.
The embodiment of the invention provides the communication means in a kind of TDD mode, comprising: transmit the subframe in the radio frames, comprise several slots in the described subframe;
Transmit data in two descending time slots between next-door neighbour's protection at interval;
Transmit data in the time slot after protection at interval, the time slot after the described protection at interval is configured to ascending time slot and/or descending time slot.
Embodiments of the invention also provide the communicator in a kind of TDD mode, comprising: the unit that is used to generate subframe;
Be used to transmit the unit of described subframe, transmit data in two descending time slots between next-door neighbour's protection at interval; Transmit data in the time slot after protection at interval;
Being used for the time slot configuration after the protection at interval is the unit of ascending time slot and/or descending time slot.
Technical scheme according to the embodiment of the invention provides in the process of the subframe that transmits radio frames, can realize the coexistence with the TD-SCDMA system.
Description of drawings
Fig. 1 is a frame structure schematic diagram in a kind of tdd systems in the prior art;
Fig. 2 is the frame structure schematic diagram in the first embodiment of the invention method;
Fig. 3 is the fifth embodiment of the invention structure drawing of device.
Embodiment
With reference to the accompanying drawings, further describe embodiments of the present invention.
With reference to Fig. 2, be the frame structure schematic diagram in the first embodiment of the invention.The method of first embodiment of the invention is as follows:
Transmit a radio frames, during subframe in transmitting radio frames, transmit data in descending time slot 0 in subframe and the descending time slot 1 earlier;
After protection interval 201, the time slot 2 in subframe transmits data to time slot 13.
Keep a period of time interval 202 in each time slot, this time interval 202 can be placed on the foremost portion of each time slot, also can be placed on the decline of each time slot, and the size in the time interval 202 can be adjusted according to system's setting.With protection at interval 201 adjacent time intervals 202 can be considered to protect 201 expansion at interval, thereby can support bigger coverage.The described time interval 202 can also be used to providing for relay system the time interval of signal delay, and provides and be up to descending transfer point.
In transmission course, it is constant that time slot 0 and time slot 1 are fixed as descending time slot, time slot 2 to time slot 13 as required flexible configuration be ascending time slot or descending time slot.To time slot 13, reach in the transmission time slot complete matching with the TD-SCDMA system by configuration time slot 2, realize the requirement of coexistence of systems.In a radio frames that is transmitted, because the time slot 2 in each subframe to the configuration of time slot 13 may be different, therefore, the structure of two subframes in radio frames can be identical, also can be inequality.
In a subframe, the length of each time slot can be 337.5 microseconds, that is, their length all is half of frame structure slot length in the TD-SCDMA system.In this subframe, slot length also can for: the length of descending time slot 0, time slot 2 and time slot 3 is adjustable, but total length of these three time slots is constant, be three 337.5 microsecond length and; The length of remaining ascending time slot or descending time slot is half of frame structure slot length in the TDS-CDMA system, is 337.5 microseconds.Because each the time slots length in the transmission is shorter, general for slot length in the TD-SCDMA system has littler scheduling of resource particle, reduces the wasting of resources.In addition, when the length of time slot 0, time slot 2 and time slot 3 for can adjust the time, can influence protection size at interval, thereby can support cell coverage area flexibly.
Introduce second execution mode of the inventive method below; the present embodiment and first execution mode are basic identical; but in the process of transmission subframe; symbol that can vacant descending time slot 1; symbol in descending time slot 1 is by after vacant; because descending time slot 1 is adjacent at interval with protection, can think that then protection is enlarged at interval, according to formula:
R=c * T
GP/ 2 (R is a radius of society, and c is the light velocity, T
GPFor protecting blanking time)
As can be known, radius of society will enlarge, thereby can support wider sub-district to cover.
Equally, can be vacant with the adjacent at interval time slot 2 of protection in symbol, enlarge protection at interval.In addition; can be vacant with the adjacent at interval continuous a plurality of time slots of protection in symbol; for example; symbol in vacant time slot 2 and the time slot 3; the perhaps symbol in time slot 2, time slot 3 and the time slot 4, by parity of reasoning, the symbol in can be vacant as required more and the adjacent at interval continuous a plurality of time slots of protection; thereby change protection size at interval neatly, thereby adjust the scope that the sub-district covers.
The length at interval of protection described in the prior art is fixed, thereby the radius of society that can be suitable for is limited, and in addition, protection expansion at interval can also reduce the interference of telepoint base station downstream signal to this cell uplink signal.Therefore, adopt the technical scheme of present embodiment to have remarkable advantages.
Introduce the 3rd execution mode of the present invention below, present embodiment and above-mentioned dual mode are basic identical, transmit in the process of data to time slot 13 at time slot 2, symbol in some time slots in can vacant wireless frame structure, being up to the descending change-over time and/or the change-over time of downstream-to-upstream in the system transmissions process is provided, specifically needs vacant number of time slot to decide according to the transfer point in the transmission course.Such as, time slot 3 to time slot 13 is descending time slot, then has only a transfer point this moment, and between existence and time slot 2 and the time slot 3, at this moment, a symbol in the vacant time slot 2 provides to be up to descending change-over time; If time slot 2 to time slot 4, time slot 8 to time slot 10 is ascending time slot, time slot 5 to time slot 7, time slot 11 to time slot 13 is descending time slot, then this moment three transfer points are arranged: lay respectively at up transfer point of descending commentaries on classics between up commentaries on classics between time slot 4 and the time slot 5 descending transfer point, time slot 7 and the time slot 8 and the descending transfer point of up commentaries on classics between time slot 10 and the time slot 11, then need the symbol in vacant 3 time slots this moment.
Introduce the 4th execution mode of the inventive method below, present embodiment and above-mentioned three kinds of execution mode transmission courses are basic identical, but it is big or need the down channel of all standing in transmitting power, such as: descending synchronous signal channel, broadcast channel etc., carrying is away from communicating in the protection descending time slot 0 at interval; When the time slot of time slot 3 to time slot 13 is set to descending time slot, because time slot 3 to time slot 13 communicates away from protecting at interval, then also described down channel can being carried in these descending time slots.
The up channel that some are important; as: the uplink random access channel; then be carried on away from carrying out the general character in the protection ascending time slot at interval, when the time slot of time slot 3 to time slot 13 is set to ascending time slot, then important up channel can be carried in these ascending time slots and communicates.By away from protection at interval ascending time slot or descending time slot in carrying these important or special up channel or down channels, can effectively reduce the interference between the uplink and downlink signals that the TD-SCDMA frame structure caused.
Embodiments of the invention have also proposed the communicator in a kind of TDD mode, with reference to Fig. 3, introduce the structural representation of the 5th execution mode device among the present invention.Described communicator 300 comprises the unit 301 that is used to generate subframe; Be used to transmit the unit 302 of described subframe; Being used for the time slot configuration after the protection at interval is the unit 303 of ascending time slot and/or descending time slot.
Be used for generating the subframe that the unit 301 of subframe generates and comprise several slots, remain with the time interval in the described time slot, the described time interval is placed on the foremost portion or the decline of each time slot, and the size in the time interval can be adjusted as required.
The length of each time slot can be 337.5 microseconds, or
The length of two time slots in two descending time slots before next-door neighbour's protection at interval after the length of first descending time slot and the next-door neighbour's protection at interval is adjustable; The length of all the other time slots is 337.5 microseconds;
Be used to transmit the unit 302 of described subframe, transmit data in two descending time slots between next-door neighbour's protection at interval; Transmit data in the time slot after protection at interval.
Generate in the frame structure that the unit 301 of subframe generates, it is big or need the down channel of all standing to carry transmitting power away from protection descending time slot at interval, as: descending synchronous signal channel, downlink broadcast channel etc.; Can carry some important up channels away from protection ascending time slot at interval, as up Random Access Channel etc.
Described communicator 300 also comprises and is used for the vacant time slot at interval adjacent with protection or the unit 304 of the symbol in continuous a plurality of time slot; by vacant at interval adjacent with protection one or with the adjacent at interval continuous a plurality of time slots of protection in symbol; thereby change protection size at interval neatly; thereby adjust the scope that the sub-district covers, reduce of the interference of telepoint base station downstream signal this cell uplink signal.Described communicator 300 also comprises the time slot of time slot that is used for after the vacant protection at interval or the unit 305 of the symbol in a plurality of time slot; symbol by vacant ascending time slot or descending time slot; can provide be up in the communication process descending, or change-over time of downstream-to-upstream.
To sum up, by the technical scheme that the embodiment of the invention provides, the time slot in each subframe is all smaller, can reduce the scheduling of resource particle, reduces system resource waste; The time interval in each time slot can be the protection interval that relay system provides signal delay, also can provide to be up to descending switching point; Can support the coverage of sub-district flexibly by the symbol in vacant some time slot, and effectively reduce the interference between the uplink and downlink signals, provide to be up to change-over time descending, downstream-to-upstream; With the time slot configuration after the protection at interval is that ascending time slot and/or descending time slot can be realized the coexistence of systems with TD-SCDMA.
More than communication means and device thereof in a kind of tdd mode provided by the present invention are described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (13)
1. the communication means in the TDD mode is characterized in that,
Transmit the subframe in the radio frames, comprise several slots in the described subframe;
Transmit data in two descending time slots between next-door neighbour's protection at interval;
Transmit data in the time slot after protection at interval, the time slot after the described protection at interval is configured to ascending time slot and/or descending time slot.
2. communication means as claimed in claim 1 is characterized in that, remains with the time interval in the described time slot;
3. communication means as claimed in claim 2 is characterized in that, the described time interval is placed on the foremost portion or the decline of each time slot.
4. communication means as claimed in claim 3 is characterized in that, when transmitting data in the time slot after protection at interval, and the symbol in the time slot after the vacant protection at interval in a time slot or a plurality of time slot.
5. communication means as claimed in claim 3 is characterized in that,
Vacant time slot adjacent at interval or the symbol in continuous a plurality of time slot with protection.
6. communication means as claimed in claim 3 is characterized in that, bearing downlink synchronizing channel and broadcast channel in away from protection descending time slot at interval.
7. communication means as claimed in claim 3 is characterized in that, carries ascending control channel in away from protection ascending time slot at interval.
8. as each described communication means in the claim 1 to 7, it is characterized in that the length of described time slot is 337.5 microseconds.
9. as each described communication means in the claim 1 to 7, it is characterized in that,
The length of two time slots in two descending time slots before next-door neighbour's protection at interval after the length of first descending time slot and the next-door neighbour's protection at interval is adjustable; The length of all the other time slots is 337.5 microseconds.
10. the communicator in the TDD mode is characterized in that, comprising:
Be used to generate the unit of subframe;
Be used to transmit the unit of described subframe, transmit data in two descending time slots between next-door neighbour's protection at interval; Transmit data in the time slot after protection at interval;
Being used for the time slot configuration after the protection at interval is the unit of ascending time slot and/or descending time slot.
11. communicator as claimed in claim 10, it is characterized in that, the subframe that the described unit that is used for generating subframe generates comprises several slots, remains with the time interval in the described time slot, and the described time interval is placed on the foremost portion or the decline of each time slot.
12. communicator as claimed in claim 11 is characterized in that, described device also comprises and is used for the vacant time slot at interval adjacent with protection or the unit of the symbol in continuous a plurality of time slot.
13. communicator as claimed in claim 11 is characterized in that, described device also comprises the time slot of time slot that is used for after the vacant protection at interval or the unit of the symbol in a plurality of time slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101277844A CN101232359A (en) | 2007-01-23 | 2007-06-28 | Communicating method and device of TDD mode |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710073030 | 2007-01-23 | ||
| CN200710073030.5 | 2007-01-23 | ||
| CN200710085349.X | 2007-03-01 | ||
| CNA2007101277844A CN101232359A (en) | 2007-01-23 | 2007-06-28 | Communicating method and device of TDD mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101232359A true CN101232359A (en) | 2008-07-30 |
Family
ID=39898563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101277844A Pending CN101232359A (en) | 2007-01-23 | 2007-06-28 | Communicating method and device of TDD mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101232359A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102150382A (en) * | 2009-11-13 | 2011-08-10 | 高通股份有限公司 | Method and apparatus for uplink and downlink RF switching |
| WO2016119753A1 (en) * | 2015-01-30 | 2016-08-04 | Mediatek Inc. | Frame structure and data mapping for license assisted access |
-
2007
- 2007-06-28 CN CNA2007101277844A patent/CN101232359A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102150382A (en) * | 2009-11-13 | 2011-08-10 | 高通股份有限公司 | Method and apparatus for uplink and downlink RF switching |
| WO2016119753A1 (en) * | 2015-01-30 | 2016-08-04 | Mediatek Inc. | Frame structure and data mapping for license assisted access |
| US10397795B2 (en) | 2015-01-30 | 2019-08-27 | Mediatek Inc. | Frame structure and data mapping for license assisted access |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101345544B (en) | Method and system for wireless transmission adopting Relay supported frame structure | |
| CN102113398B (en) | Resource allocation method for backhaul link and access link in wireless communication system including relay | |
| CN101072065B (en) | Apparatus and method for transparent relaying in multi-hop relay cellular network | |
| CN101438535B (en) | Apparatus and method for supporting relay service in a multi-hop relay broadband wireless access communication system | |
| EP2191588B1 (en) | Method and network node for operating at least two radio access technologies and communication system comprising such device | |
| CN106471755A (en) | System and method for TDD communication | |
| CN102326347A (en) | Method for allocating reference signals of backhaul link in relay communication system, and method and apparatus for transmitting/receiving data using same | |
| EP1909441B1 (en) | Wireless communication method, device and data structure | |
| KR20070031173A (en) | Apparatus and method for supportting multi link in multi-hop relay cellular network | |
| RU2000101859A (en) | MULTIPLE ACCESS RADIO SYSTEMS WITH TEMPORARY DIVISION OF CHANNELS | |
| CN101814944B (en) | Data transmission method, system and device | |
| CN103222204A (en) | Apparatus and method to reduce interference between frequency-ivision duplex and time-division duplex signals in a communication system | |
| CN101473557A (en) | Apparatus and method for supporting relay service in multi-hop relay broadband wireless access communication system | |
| JP3058793B2 (en) | Wireless communication system | |
| CN101374015A (en) | Wireless transmission method supporting relay mode and physical layer frame structure | |
| CN103477691A (en) | Cooperative relay in MBMS transmission | |
| CN101374012B (en) | Wireless transmission method for TDD OFDM system and physical layer frame structure | |
| CN102893697A (en) | Base station, wireless communication method, user equipment, and wireless communication system | |
| CN102148784B (en) | Communication method, system and device between base station and relay station in relay system | |
| CN101374011B (en) | Method for implementing critical frequency coexist between two different communication systems and physical layer frame structure | |
| CN101784125A (en) | Data transmission method and system in TDD mode | |
| CN101299873A (en) | Method for allocating random access channel | |
| CN1964222B (en) | A system and method for wireless transfer communication | |
| CN101442755B (en) | Radio communication system capable of supporting Relay | |
| CN101119154B (en) | Communication method and device of TDD mode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20080730 |