CN1996792A - A timing synchronization method of the uplink reference signals - Google Patents
A timing synchronization method of the uplink reference signals Download PDFInfo
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- CN1996792A CN1996792A CNA2006100326228A CN200610032622A CN1996792A CN 1996792 A CN1996792 A CN 1996792A CN A2006100326228 A CNA2006100326228 A CN A2006100326228A CN 200610032622 A CN200610032622 A CN 200610032622A CN 1996792 A CN1996792 A CN 1996792A
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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
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
This invention discloses one signal send method of multi-user mobile communication system, which is characterized by the following: the upper simultaneous reference signals and data are complexities in time zone or frequency area or code area; the said signals are emitted independently with zero data; then emitting the affairs triggered by base station in circle. The invention can effectively solve the upper timer and control problem in the transmission of data and without data.
Description
Technical field
The present invention relates to mobile communication system, relate in particular to and use reference signal to carry out the synchronous method of up timing in the moving communicating field.
Background technology
The message transmission rate that following mobile communication system requires to provide will be up to more than the 100Mbit/s, and the business of support also will expand to multimedia service (comprising real-time streaming media service) from speech business.Can realize on limited frequency spectrum resources that two-forty and jumbo technology have become the focus of present research.Wide-band mobile communication system will experience the frequency selectivity of channel usually.The frequency selectivity of so-called channel is exactly the decay difference of channel on different frequency.Frequency-selective channel can cause serious intersymbol interference (ISI), inter-carrier interference (ICI) and multiple access to disturb (MAI) usually.The most frequently used method of contrary frequency selectivity decline is exactly to use the single carrier balancing technique at receiving terminal, and it is divided into single carrier wave time domain balancing technique and single-carrier wave frequency domain equalization technology two big classes.The single carrier wave time domain balancing technique is a kind of mature technique, possesses very strong antijamming capability.Yet the complexity of single carrier wave time domain equalizer and the maximum delay of channel are extended to the proportionate relationship that cube increases, so the single carrier wave time domain equalizer is difficult to realize in some practical application.It is another kind of that balancing technique---single-carrier wave frequency domain equalization technology has overcome the shortcoming of single carrier wave time domain balancing technique.Under frequency selective fading channels, received signal is the convolution that sends signal and channel impulse response on time domain, then is the product that sends signal and channel frequency domain response on frequency domain.According to the channel frequency domain response that channel estimating obtains, the single carrier frequency domain equalization device can carry out equilibrium respectively on each frequency, thereby computation complexity is reduced widely.In theory, the single carrier frequency domain equalization device is the same with the performance of single carrier wave time domain equalizer, and the complexity of its complexity and ofdm system is suitable.
Also has the processing mode of simplifying more for the single carrier frequency domain equalization device, by adding Cyclic Prefix or zero filling for the emission symbol, the linear convolution process of signal and channel is converted into circular convolution, simplified the processing of receiver, as long as the maximum delay of channel expansion energy window is controlled within the CP (cyclic preamble), just can effectively remove user's self intersymbol interference (ISI).
If the time that uplink multi-users is arrived the base station all synchronously within a benchmark CP, just can be united Fourier transform processing with multi-user's received signal, simplified receiver multi-user's processing.
Uplink synchronous control can guarantee that uplink multi-users arrives the time of base station all synchronously within a benchmark CP, the operation of uplink synchronous can be taked up emission synchronous reference signal, the time of advent of the up emission synchronous reference signal of base station measurement, with the reference time ratio, determine that the terminal emission needs the time in advance or that lag behind, then by descending order, with time of needs adjustment also the mode of multi-system or stepping adjustment notify terminal to adjust launch time.
Because the mobility of terminal, the time that arrives the base station is also constantly changing, so must carry out this Synchronization Control process repeatedly, the repetition of Synchronization Control process can be periodic, also can be Event triggered.
Summary of the invention
Technical problem to be solved by this invention is to solve the launching technique of the up emission synchronous reference signal that is used for uplink synchronous operation, with help the uplink synchronous control procedure succinct, stable, resource consumption is few.
For solving the problems of the technologies described above, the invention provides provides a kind of launching technique that is used for the up emission synchronous reference signal of uplink synchronous operation, comprises following feature:
Uplink synchronous reference signal and data are in time domain, (phase place) territory or sign indicating number are multiplexing on the territory frequently;
Up reference sync signal can periodic transmission, is launched by base station scheduling, also can launch according to Event triggered;
The emission that is used for the up emission synchronous reference signal of uplink synchronous operation among the present invention can be in time domain, multiplexing on (phase place) territory or the sign indicating number territory frequently, can periodic transmission, launched by base station scheduling or launch according to Event triggered.Use this launching technique, can effectively solve professional upstream synchronous timing control problem when activated state has transfer of data and free of data transmission, guaranteeing to concentrate effective power to transmit under synchronization accuracy and the situation of lock in time, the utilance of frequency band and user's the rate of reusing have been improved simultaneously.
Description of drawings
Fig. 1 is based on the hardwood structure of the single carrier emission system of CP insertion
Fig. 2 be uplink synchronous reference signal and data in time domain, multiplexing schematic diagram on (phase place) territory or the sign indicating number territory frequently;
Fig. 3 is that up reference sync signal can periodic transmission
Fig. 4 is the up reference sync signal according to base station scheduling or Event triggered emission
Fig. 5 is the schematic diagram that inserts at interval on the up reference sync signal frequency domain
The up reference sync signal multi-user orthogonal of Fig. 6
The multiplexing emission flow chart of the up reference sync signal of Fig. 7
Preferred forms of the present invention
The system that the single carrier that inserts based on CP transmits and receives is a kind of up-and-coming communication system that realizes spectral efficient, peak value speed, low peak average ratio under the high bandwidth more.
Fig. 1 has described a kind of typical hardwood structure of inserting based on CP of single carrier emission system, and hardwood (TTI) is made up of a plurality of Block, and Block can padding data or other physical layer signalings, and front end is the CP of insertion.The CP part is by the signal replication at the rear portion of Block, and each Block has the CP that is under the jurisdiction of own Block.
Fig. 2 described uplink synchronous reference signal and data in time domain, multiplexing signal on (phase place) territory or the sign indicating number territory frequently, shown in (a), data DATA and uplink synchronous reference signal are multiplexing relations on time shaft, can be in time make a distinction with the base unit of Block.Shown in (b), on frequency (phase place) axle, could distinguish data DATA and uplink synchronous reference signal, the realization arrow is that DATA, dotted arrow are the uplink synchronous reference signal, and data DATA and uplink synchronous reference signal can't be distinguished on time shaft, mix.Shown in (c), could distinguish data DATA and uplink synchronous reference signal by code word, data DATA and uplink synchronous reference signal can't be distinguished on time shaft, mix.No matter be the time-division, frequently (phase) divide still sign indicating number branch, can not have only a Block can transmit uplink synchronizing signals in the TTI, may be a Block, also may be one group of Block carrying uplink synchronizing signals, and the piece number of Block can satisfy the required precision of uplink synchronous.
Block in the TTI not only can carry top said DATA and uplink synchronous reference signal, also can carry and be used for such reference signal, these reference signals can be carried out the channel condition information statistics or the frequency band outer channel state information of scheduling usefulness in the channel estimating, frequency band of coherent demodulation and be surveyed.These reference signals can be carried out function reuse with uplink synchronizing signals, and promptly same piece Block content can be finished the function of above-mentioned channel estimating, channel condition information statistics, information detection and uplink synchronous.Can save the carrying of upstream physical layer signaling like this, improve spectrum efficiency.
Fig. 3 has described up reference sync signal in time-multiplexed mode can periodic transmission, shown in (a), and when business datum activates and transfer of data is arranged, the up reference sync signal cyclical transmission in every TTI.Shown in (b), uplink synchronizing signals can not rely on data sheet solely to be launched, and data can be sky.When business datum was in state of activation but does not have transfer of data, the up reference sync signal in every TTI also can cyclical transmission.Cycle t1 and t2 can be identical with the cycle of TTI, also can be greater than the cycle of TTI, and the preferred cycle parameter is 10ms.
Fig. 4 is the up reference sync signal schematic diagram according to the emission of base station scheduling or Event triggered, and these two kinds of emission modes only are present in activation of service but in time period of free of data transmission.An example of base station scheduling is that the data that do not receive terminal in time of a fixed length are judged in the base station, forces the terminal to transmit uplink synchronous reference signal.An example of Event triggered is a terminal when switching between the higher base station of synchronization accuracy, can give neighbor base station obtaining timing controlled by Event triggered uplink synchronous reference signal, thereby can smooth and easyly switch in other base station area.
When terminal during at the non-activation of business (idle) state, the uplink synchronous reference signal is closed periodic transmission, but can be launched by base station scheduling or according to the Event triggered emission, can farthest save the power consumption of terminal like this.
Fig. 5 is the schematic diagram of the mode of multiple insertion on the up reference sync signal frequency domain, no matter the uplink synchronous reference signal is multiplexing on time domain, frequency domain or the sign indicating number territory, no matter be to have between transfer of data or data activation free of data transmission period at data activation, also no matter be inside and outside at data bandwidth, its processing on frequency domain can be adopted the mode of inserting at interval, also can adopt the method for continuous insertion.Routine as shown, when the uplink synchronous reference signal adopted the mode of inserting at interval on frequency domain, its shared bandwidth can be not limited to the shared bandwidth of transfer of data.Outside uplink synchronizing signals is in band or between data activation free of data transmission period, recommend to adopt the method for inserting at interval, insert at interval and can concentrate effective power to transmit, improved the utilance of frequency band and user's the rate of reusing, do not influence the precision and the time of uplink synchronous simultaneously again.The insertion method of uplink synchronizing signals is not limited to shown in Figure 5.
Fig. 6 is the orthogonality with the synchronizing signal of the relation explanation uplink multi-users of time domain orthogonal, the uplink synchronous reference signal is quadrature between the multi-user, the uplink synchronous reference signal of each user in the multi-user and data can be in time domains, multiplexing on (phase place) territory or yard territory frequently, can periodically launch, be launched or launch according to Event triggered by base station scheduling;
As shown in Figure 6, user 1,2,3 uplink synchronous reference signal and data are multiplexing on time-domain respectively, periodic emission, but user 1,2,3 uplink synchronous reference signal is not overlapping on time domain mutually, belongs to the relation of quadrature.Further expanding can be at time-domain, frequency (phase place) territory, sign indicating number territory or spatial domain quadrature.The implementation method of quadrature is not limited to shown in Figure 6.
Claims (11)
1, the signaling method of a kind of multiuser mobile communication system, it is characterized in that: uplink synchronous reference signal and data can be in time domains, multiplexing on (phase place) territory or the sign indicating number territory frequently, described uplink synchronizing signals can not rely on data sheet solely to be launched, and data can be sky;
Periodically launch then or launched by base station scheduling or launch according to Event triggered;
2, the method for claim 1 is characterized in that, described uplink synchronous reference signal can be used for carrying out the channel estimating of coherent demodulation, the channel condition information statistics or the frequency band outer channel state information of the interior scheduling of frequency band usefulness surveyed;
3, the method for claim 1, it is characterized in that, no matter described uplink synchronous reference signal is multiplexing on time domain, frequency domain or the sign indicating number territory, can not have only a piece Block can transmit uplink synchronizing signals in the hardwood, may be a piece Block, also may be chunk Block carrying uplink synchronizing signals, the sum of piece Block can satisfy the required precision of uplink synchronous.
4, the method for claim 1 is characterized in that, the described uplink synchronous reference signal emission cycle can be identical with the hardwood cycle, also can be greater than the hardwood cycle, and preferred 10ms of cycle;
As claim 1 or 2 or 3 or 4 described methods, it is characterized in that 5, described uplink synchronous reference signal can adopt the mode of inserting at interval on frequency domain, also can adopt the mode of continuous insertion;
6, as claim 1 or 2 or 3 or 4 described methods, it is characterized in that, each individual consumer's uplink synchronous reference signal and data can be multiplexing on time domain, frequency domain or sign indicating number territory among the multi-user, can periodically launch, be launched or launch, but each user's uplink synchronous reference signal is mutually orthogonal according to Event triggered by base station scheduling;
As claim 1 or 2 or 3 or 4 described methods, it is characterized in that 7, described uplink synchronous reference signal is at activation of service and the state of transfer of data is arranged is the cycle emission; At professional activation of service but during the state of free of data transmission, can be periodic transmission, be launched by base station scheduling or launch according to Event triggered; When professional unactivated state, close periodic transmission, can be launched by base station scheduling or launch according to Event triggered.
As claim 1 or 2 or 3 or 4 described methods, it is characterized in that 8, described uplink synchronous reference signal is at activation of service and the state of transfer of data is arranged is the cycle emission; At professional activation of service but during the state of free of data transmission, can be periodic transmission, be launched by base station scheduling or launch according to Event triggered; When professional unactivated state, close periodic transmission, can be launched by base station scheduling or launch according to Event triggered.
As claim 1 or 2 or 3 or 4 described methods, it is characterized in that 9, described uplink synchronous reference signal is at activation of service and the state of transfer of data is arranged is the cycle emission; At professional activation of service but during the state of free of data transmission, can be periodic transmission, be launched by base station scheduling or launch according to Event triggered; When professional unactivated state, close periodic transmission, can be launched by base station scheduling or launch according to Event triggered.
As claim 1 or 2 or 3 or 4 described methods, it is characterized in that 10, when described uplink synchronous reference signal adopted the mode of inserting at interval on frequency domain, its shared bandwidth can be not limited to the shared bandwidth of transfer of data.
11, method as claimed in claim 6 is characterized in that, the uplink synchronizing signals of described quadrature is at time-domain, frequency (phase place) territory, sign indicating number territory or spatial domain quadrature.
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| CNA2006100326228A CN1996792A (en) | 2006-01-01 | 2006-01-01 | A timing synchronization method of the uplink reference signals |
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| CNA2006100326228A CN1996792A (en) | 2006-01-01 | 2006-01-01 | A timing synchronization method of the uplink reference signals |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101399578B (en) * | 2007-09-28 | 2011-11-09 | 鼎桥通信技术有限公司 | Uplink power control and synchronization method and system |
| CN101425889B (en) * | 2007-10-30 | 2013-01-23 | 电信科学技术研究院 | Synchronization method and system in non-scheduling transmission |
| CN110058079A (en) * | 2013-06-17 | 2019-07-26 | 施耐德电器工业公司 | Calculate system, the electric substation including the system and the method for calculating electricity of electricity |
-
2006
- 2006-01-01 CN CNA2006100326228A patent/CN1996792A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101399578B (en) * | 2007-09-28 | 2011-11-09 | 鼎桥通信技术有限公司 | Uplink power control and synchronization method and system |
| CN101425889B (en) * | 2007-10-30 | 2013-01-23 | 电信科学技术研究院 | Synchronization method and system in non-scheduling transmission |
| CN110058079A (en) * | 2013-06-17 | 2019-07-26 | 施耐德电器工业公司 | Calculate system, the electric substation including the system and the method for calculating electricity of electricity |
| CN110058079B (en) * | 2013-06-17 | 2023-02-17 | 施耐德电器工业公司 | System for calculating electric quantity, substation comprising such a system and method for calculating electric quantity |
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Open date: 20070711 |