CN105376039A - Transmission method and device for time division duplex system signal - Google Patents
Transmission method and device for time division duplex system signal Download PDFInfo
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- CN105376039A CN105376039A CN201410415236.1A CN201410415236A CN105376039A CN 105376039 A CN105376039 A CN 105376039A CN 201410415236 A CN201410415236 A CN 201410415236A CN 105376039 A CN105376039 A CN 105376039A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
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Abstract
The invention provides a transmission method and device for time division duplex system signals. Reverse links are embedded into a subframe structure at the tail end of a subframe, so switching between an uplink and a downlink is not necessary during transmission of time division duplex system signals, and then operations of guard intervals and timing advance are minimized. In this way, the power consumption is reduced, and the cost of resources is cut. Moreover, reverse links and guard intervals are configured flexibly according to the type of subsequent subframes, and resources are further saved.
Description
Technical field
The present invention relates to the subframe structure under time division duplex (TDD) mode of operation, be specifically related to transmission method and the device of TDD system signal, especially the subframe structure optimized for TDD of next generation communication system medium-high frequency carrier transmission.
Background technology
Although traditional the third generation wireless communication system defines two kinds of mode of operations, Frequency Division Duplexing (FDD) (FDD) and time division duplex (TDD), FDD mode of operation is occupied an leading position, and therefore subframe structure design is mainly for FDD mode of operation.For TDD mode of operation, traditional subframe structure design has slowly corresponding, and the Loop Round Trip Time of HARQ process postpones grow and depend on the defects such as uplink and downlink sub-frame configuration ratio.
Traditional low-frequency range resource is very limited, and along with the explosive growth of data service, unlicensed frequency band and millimeter wave frequency band are more and more subject to extensive concern because frequency domain resource is abundant in recent years.In order to meet the various demands of future communications business, next generation communication system may have following feature:
Support uplink and downlink capacity requirement and asymmetric property flexibly.
√, in order to effectively utilize uplink and downlink non-symmetrical spectrum, needs to consider for the distinctive optimal design of TDD;
Support the low-response time (lower than 1 millisecond)
√ considers shorter frame length;
√ considers scheduling and the HARQ process design of optimization;
Support lower power loss, allow the user's battery life more grown;
Support multiple communication link, except traditional uplink and downlink link, also support the self-backhualing link of base station to base station and the D2D link of user to user
√ needs the general design of eating dishes without rice or wine considering not rely on Linktype, as similitude between maximization different radio transmission link etc.;
Consider above factor, we estimate the 5th generation wireless communication system will be for TDD optimize eat dishes without rice or wine design.
Summary of the invention
For defect of the prior art, the object of this invention is to provide a kind of transmission method and device of TDD system signal.
According to the transmission method of a kind of TDD system signal provided by the invention, wherein:
In a downlink wireless subframe, access node sends a signal to equipment end on M1 descending time slot, and M2 ascending time slot receives the signal from equipment end; Insert one between a described M1 descending time slot and M2 ascending time slot and protect interval (GuardPeriod, GP), M1, M2 are positive integer, and M1 is greater than M2, and M1 and M2's and be the number summation of all time slots in described descending sub frame;
In a wireless uplink subframe, equipment end sends a signal to access node on N1 ascending time slot, and N2 descending time slot receives the signal from access node; Insert one between a described N2 descending time slot and N1 ascending time slot and protect interval, N1, N2 are positive integer, and N1 is greater than N2, and N1 and N2's and be the number summation of all time slots in described sub-frame of uplink.
Be below adoptable preferred technical characteristic:
A described M2 ascending time slot is positioned at the end of described descending sub frame;
A described N2 descending time slot is positioned at the beginning of described sub-frame of uplink;
In a downlink wireless subframe, after described access node sends signal successively on C1 special descending time slot, a M1-C1 general descending time slot, described protection interval does not send signal, then on M2 ascending time slot Received signal strength, C1 is positive integer and is less than M1;
Descending Compliance control signal sends on described C1 special descending time slot, the specific downgoing control signal of equipment end and downlink data signal send on M1-C1 general descending time slot, and uplink control signal and uplink reference signals (may also comprise part upstream data. signals) send on M2 ascending time slot.
In described downlink wireless subframe, the number M2 of ascending time slot is variable element, and variable element M2 is minimum is zero.
The concrete numerical value of described variable element M2 is by the semi-static configuration of high-level signaling.
Whether described variable element M2 is zero by configuring with the follow-up subframe be connected of described descending sub frame is implicit, if follow-up connected subframe is sub-frame of uplink, then M2 is zero.
If described variable element M2 is zero, then the protection interval in described descending sub frame is also zero, and in wireless sub-frame, all time slots are descending time slot.
The duration at described protection interval is configurable, its granularity is-symbol level adjusted.
In a wireless uplink subframe, described equipment end is Received signal strength on N2 descending time slot successively, and described protection interval does not send signal, then sends signal on N1 ascending time slot;
Descending Compliance control signal sends on a described N2 descending time slot.
The described descending Compliance control signal that a described N2 descending time slot sends comprises uplink scheduling authorization signaling to current sub-frame of uplink, to the HARQ-ACK/NACK information, the downlink reference signal for channel measurement, synchronizing signal, the system information that receive downstream signal.
The uplink control signal that a described N1 ascending time slot sends is distributed in the edge of system bandwidth, and upstream data. signals is distributed in the middle part of system bandwidth.
In described wireless uplink subframe, the number N2 of descending time slot is variable element, and variable element N2 is minimum is zero.
The concrete numerical value of described variable element N2 is by the semi-static configuration of high-level signaling.
Described variable element N2 zero can implicitly by the subframe be connected with described sub-frame of uplink forward direction configure, if forward direction is connected, subframe is descending sub frame, then N2 is zero.
If described variable element N2 is zero, and the subframe end be connected with described sub-frame of uplink forward direction is sub-frame of uplink, then the protection interval in described sub-frame of uplink is also zero, and in wireless sub-frame, all time slots are ascending time slot.
If described variable element N2 is zero, and the subframe end be connected with described sub-frame of uplink forward direction is descending sub frame, then the protection interval in described sub-frame of uplink moves on to described sub-frame of uplink front end, and in subframe, all time slots are ascending time slot.
According to the transmitting device of a kind of TDD system signal provided by the invention, comprise access node, described access node uses the transmission method of above-mentioned TDD system signal to carry out work.
According to the transmitting device of a kind of TDD system signal provided by the invention, comprise equipment end, described equipment end uses the transmission method of above-mentioned TDD system signal to carry out work.
Compared with prior art, the present invention has following beneficial effect:
(1) present invention utilizes a kind of subframe structure reverse link being embedded into subframe end.Because the present invention is in the transmitting procedure of TDD system signal; embedded reverse link is placed on subframe end, decreases unnecessary uplink and downlink link switching, thus decrease the operation of protection interval and timing advance; not only decrease power loss, also save resource overhead.
(2) the present invention according to subsequent subframe type flexible configuration reverse link and protection interval, will save resource further.
Accompanying drawing explanation
By reading the detailed description done non-limiting example with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is the descending sub frame structure that the TDD utilized in transmission method provided by the invention optimizes;
The sub-frame of uplink of Fig. 2 to be subsequent subframe be link in the same way;
The sub-frame of uplink of Fig. 3 to be subsequent subframe be reverse link.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.Following examples will contribute to those skilled in the art and understand the present invention further, but not limit the present invention in any form.It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, some distortion and improvement can also be made.These all belong to protection scope of the present invention.
According to the transmitting device of a kind of TDD system signal provided by the invention, comprise access node and equipment end, wherein, described access node and equipment end use are that the transmission method of a kind of TDD system signal provided by the invention carries out work equally.
Particularly, in the transmission method of described TDD system signal, adopt following technical scheme:
In a downlink wireless subframe, access node sends a signal to equipment end on M1 descending time slot, and M2 ascending time slot receives the signal from equipment end; A described M2 ascending time slot is positioned at the end of described descending sub frame; Insert one between a described M1 descending time slot and M2 ascending time slot and protect interval, M1, M2 are positive integer, and M1 is greater than M2, and M1 and M2's and be the number summation of all time slots in described descending sub frame;
In a wireless uplink subframe, equipment end sends a signal to access node on N1 ascending time slot, and N2 descending time slot receives the signal from access node; A described N2 descending time slot is positioned at the beginning of described sub-frame of uplink; Insert one between a described N2 descending time slot and N1 ascending time slot and protect interval, N1, N2 are positive integer, and N1 is greater than N2, and N1 and N2's and be the number summation of all time slots in described sub-frame of uplink.
In a downlink wireless subframe, after described access node sends signal successively on C1 special descending time slot, a M1-C1 general descending time slot, described protection interval does not send signal, then on M2 ascending time slot Received signal strength, C1 is positive integer and is less than M1; Descending Compliance control signal sends on described C1 special descending time slot, the specific downgoing control signal of equipment end and downlink data signal send on M1-C1 general descending time slot, and uplink control signal and uplink reference signals (may also comprise part upstream data. signals) send on M2 ascending time slot.
In described downlink wireless subframe, the number M2 of ascending time slot is variable element, and the minimum of variable element M2 is zero.The concrete numerical value of described variable element M2 is by the semi-static configuration of high-level signaling.Whether described variable element M2 is zero by configuring with the follow-up subframe be connected of described descending sub frame is implicit, if follow-up connected subframe is sub-frame of uplink, then M2 is zero.If described variable element M2 is zero, then the protection interval in described descending sub frame is also zero, and in wireless sub-frame, all time slots are descending time slot.The duration at described protection interval is configurable, its granularity is-symbol level adjusted.
In a wireless uplink subframe, described equipment end is Received signal strength on N2 descending time slot successively, and described protection interval does not send signal, then sends signal on N1 ascending time slot; Descending Compliance control signal sends on a described N2 descending time slot.The described descending Compliance control signal that a described N2 descending time slot sends comprises uplink scheduling authorization signaling to current sub-frame of uplink, to the HARQ-ACK/NACK information, the downlink reference signal for channel measurement, synchronizing signal, the system information that receive downstream signal.The uplink control signal that a described N1 ascending time slot sends is distributed in the edge of system bandwidth, and upstream data. signals is distributed in the middle part of system bandwidth.
In described wireless uplink subframe, the number N2 of descending time slot is variable element, and variable element N2 is minimum is zero.The concrete numerical value of described variable element N2 is by the semi-static configuration of high-level signaling.Described variable element N2 zero can implicitly by the subframe be connected with described sub-frame of uplink forward direction configure, if forward direction is connected, subframe is descending sub frame, then N2 is zero.If described variable element N2 is zero, and the subframe end be connected with described sub-frame of uplink forward direction is sub-frame of uplink, then the protection interval in described sub-frame of uplink is also zero, and in wireless sub-frame, all time slots are ascending time slot.If described variable element N2 is zero, and the subframe end be connected with described sub-frame of uplink forward direction is descending sub frame, then the protection interval in described sub-frame of uplink moves on to described sub-frame of uplink front end, and in subframe, all time slots are ascending time slot.
Above the transmitting device of TDD system signal provided by the invention and method are described, next to described transmitting device and method based on subframe structure be specifically described.
Present invention utilizes a kind of subframe structure for TDD operation mode optimization, i.e. an embedded reverse link in a forward link subframe; This forward link can be traditional upstream or downstream link, also can be the self-backhauling link etc. of D2D or eNB-to-eNB; This reverse link and forward link are separated by the mode of time-division, are generally configured in subframe end, to reduce link switching number of times, thus decrease the power loss switching and cause; This reverse link can comprise numeric field and close control domain, also only can comprise control domain, only comprise control domain under preferable case;
Wherein, reverse link configuration mode in forward link subframe has two kinds: one is fixed configurations, namely each subframe is necessarily furnished with reverse link, each like this subframe has unified structure, Loop Round Trip Time (the RoundTripTime of HARQ process, RTT) fixing, and do not rely on uplink and downlink link configuration ratio; Another kind is flexible configuration, and the reverse link namely in each subframe configures as required, structure disunity between such subframe and subframe, does not have the subframe of reverse link can have more forward link resource, and the configuration of this reverse link can indicate by any one mode following:
A) can be that predefined mode configures, namely network pre-defines specific sub-frame configure reverse link;
B) the semi-static configuration of high-level signaling can be passed through;
C) the implicit instruction of type of subsequent subframe can be depended on:
If the link of subsequent subframe and present sub-frame is contrary, this subframe can not configure reverse link;
If the link of subsequent subframe and present sub-frame in the same way, then this sub-frame configuration reverse link;
Further, if from downlink handover to up link, a protection interval be inserted to overcome the propagation delay in downlink transfer; For descending sub frame, if each sub-frame configuration up link, then descending sub frame structure is unified, all contains a up link and a GP switched from downstream-to-upstream.For sub-frame of uplink, this protection interval can flexible configuration: if subsequent subframe is sub-frame of uplink, and before deserving, sub-frame of uplink comprise a down link and a GP switched from downstream-to-upstream; If subsequent subframe is descending sub frame, before deserving, sub-frame of uplink comprises a down link, and does not have GP, and therefore down link extends to subframe end, thus further saving resource.
Above specific embodiments of the invention are described.It is to be appreciated that the present invention is not limited to above-mentioned particular implementation, those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.
Claims (18)
1. a transmission method for TDD system signal, is characterized in that:
In a downlink wireless subframe, access node sends a signal to equipment end on M1 descending time slot, and M2 ascending time slot receives the signal from equipment end; Insert one between a described M1 descending time slot and M2 ascending time slot and protect interval, M1, M2 are positive integer, and M1 is greater than M2, and M1 and M2's and be the number summation of all time slots in described descending sub frame;
In a wireless uplink subframe, equipment end sends a signal to access node on N1 ascending time slot, and N2 descending time slot receives the signal from access node; Insert one between a described N2 descending time slot and N1 ascending time slot and protect interval, N1, N2 are positive integer, and N1 is greater than N2, and N1 and N2's and be the number summation of all time slots in described sub-frame of uplink.
2. the transmission method of TDD system signal as claimed in claim 1, is characterized in that:
In a downlink wireless subframe, after described access node sends signal successively on C1 special descending time slot, a M1-C1 general descending time slot, described protection interval does not send signal, then on M2 ascending time slot Received signal strength, C1 is positive integer and is less than M1;
Descending Compliance control signal sends on described C1 special descending time slot, and the specific downgoing control signal of equipment end and downlink data signal send on M1-C1 general descending time slot, and uplink control signal and uplink reference signals send on M2 ascending time slot.
3. the transmission method of TDD system signal as claimed in claim 2, is characterized in that:
In described downlink wireless subframe, the number M2 of ascending time slot is variable element, and variable element M2 is minimum is zero.
4. the transmission method of TDD system signal as claimed in claim 3, is characterized in that:
The concrete numerical value of described variable element M2 is by the semi-static configuration of high-level signaling.
5. the transmission method of TDD system signal as claimed in claim 3, is characterized in that:
Whether described variable element M2 is zero by configuring with the follow-up subframe be connected of described descending sub frame is implicit, if follow-up connected subframe is sub-frame of uplink, then M2 is zero.
6. the transmission method of TDD system signal as claimed in claim 3, is characterized in that:
If described variable element M2 is zero, then the protection interval in described descending sub frame is also zero, and in wireless sub-frame, all time slots are descending time slot.
7. the transmission method of TDD system signal as claimed in claim 2, is characterized in that:
The duration at described protection interval is configurable, its granularity is-symbol level adjusted.
8. the transmission method of TDD system signal as claimed in claim 1, is characterized in that:
In a wireless uplink subframe, described equipment end is Received signal strength on N2 descending time slot successively, and described protection interval does not send signal, then sends signal on N1 ascending time slot;
Descending Compliance control signal sends on a described N2 descending time slot.
9. the transmission method of TDD system signal as claimed in claim 8, is characterized in that:
The described descending Compliance control signal that a described N2 descending time slot sends comprises uplink scheduling authorization signaling to current sub-frame of uplink, to the HARQ-ACK/NACK information, the downlink reference signal for channel measurement, synchronizing signal, the system information that receive downstream signal.
10. the transmission method of TDD system signal as claimed in claim 8, is characterized in that:
The uplink control signal that a described N1 ascending time slot sends is distributed in the edge of system bandwidth, and upstream data. signals is distributed in the middle part of system bandwidth.
The transmission method of 11. TDD system signals as claimed in claim 8, is characterized in that:
In described wireless uplink subframe, the number N2 of descending time slot is variable element, and variable element N2 is minimum is zero.
The transmission method of 12. TDD system signals as claimed in claim 11, is characterized in that:
The concrete numerical value of described variable element N2 is by the semi-static configuration of high-level signaling.
The transmission method of 13. TDD system signals as claimed in claim 11, is characterized in that:
Described variable element N2 zero can implicitly by the subframe be connected with described sub-frame of uplink forward direction configure, if forward direction is connected, subframe is descending sub frame, then N2 is zero.
The transmission method of 14. TDD system signals as claimed in claim 11, is characterized in that:
If described variable element N2 is zero, and the subframe end be connected with described sub-frame of uplink forward direction is sub-frame of uplink, then the protection interval in described sub-frame of uplink is also zero, and in wireless sub-frame, all time slots are ascending time slot.
The transmission method of 15. TDD system signals as claimed in claim 11, is characterized in that:
If described variable element N2 is zero, and the subframe end be connected with described sub-frame of uplink forward direction is descending sub frame, then the protection interval in described sub-frame of uplink moves on to described sub-frame of uplink front end, and in subframe, all time slots are ascending time slot.
The transmission method of 16. TDD system signals as claimed in claim 1, is characterized in that:
A described M2 ascending time slot is positioned at the end of described descending sub frame;
A described N2 descending time slot is positioned at the beginning of described sub-frame of uplink.
The transmitting device of 17. 1 kinds of TDD system signals, comprises access node, it is characterized in that, described access node uses the transmission method of the TDD system signal according to any one of claim 1 to 16 to carry out work.
The transmitting device of 18. 1 kinds of TDD system signals, comprises equipment end, it is characterized in that, described equipment end uses the transmission method of the TDD system signal according to any one of claim 1 to 16 to carry out work.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410415236.1A CN105376039B (en) | 2014-08-21 | 2014-08-21 | The transmission method and device of TDD system signal |
| CN201811065297.4A CN108923906B (en) | 2014-08-21 | 2014-08-21 | Transmission method and device for time division duplex system signal |
| CN201811065300.2A CN109039571B (en) | 2014-08-21 | 2014-08-21 | Transmission method and device for time division duplex system signal |
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| CN201410415236.1A CN105376039B (en) | 2014-08-21 | 2014-08-21 | The transmission method and device of TDD system signal |
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| CN201811065297.4A Division CN108923906B (en) | 2014-08-21 | 2014-08-21 | Transmission method and device for time division duplex system signal |
| CN201811065300.2A Division CN109039571B (en) | 2014-08-21 | 2014-08-21 | Transmission method and device for time division duplex system signal |
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| CN105376039A true CN105376039A (en) | 2016-03-02 |
| CN105376039B CN105376039B (en) | 2018-12-18 |
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| CN201811065297.4A Active CN108923906B (en) | 2014-08-21 | 2014-08-21 | Transmission method and device for time division duplex system signal |
| CN201811065300.2A Active CN109039571B (en) | 2014-08-21 | 2014-08-21 | Transmission method and device for time division duplex system signal |
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| CN201811065300.2A Active CN109039571B (en) | 2014-08-21 | 2014-08-21 | Transmission method and device for time division duplex system signal |
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| CN109314983A (en) * | 2016-06-10 | 2019-02-05 | 株式会社Ntt都科摩 | User terminal and wireless communications method |
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| CN109995500B (en) * | 2019-03-08 | 2021-10-29 | 北京集创北方科技股份有限公司 | Data transmission method and display control device |
| CN110995428B (en) * | 2019-12-13 | 2020-10-23 | 夏侯淑琴 | Electronic equipment using fusion access and corresponding access method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN109039571A (en) | 2018-12-18 |
| CN108923906A (en) | 2018-11-30 |
| CN105376039B (en) | 2018-12-18 |
| CN109039571B (en) | 2020-12-29 |
| CN108923906B (en) | 2021-01-26 |
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