CN101112114A - Method and device for using training sequence with variation length in wireless communication - Google Patents
Method and device for using training sequence with variation length in wireless communication Download PDFInfo
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- CN101112114A CN101112114A CNA2006800034730A CN200680003473A CN101112114A CN 101112114 A CN101112114 A CN 101112114A CN A2006800034730 A CNA2006800034730 A CN A2006800034730A CN 200680003473 A CN200680003473 A CN 200680003473A CN 101112114 A CN101112114 A CN 101112114A
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Abstract
The present invention discloses a communication method for radio communication system, comprising the steps of detecting signals received from a mobile terminal so as to obtain detected results of a corresponding uplink channel of the received signals; determining the length criteria of training sequences in corresponding uplink bursts based on said detected results of the uplink channel; allocating predetermined uplink timeslots for said mobile terminal based on said length criteria of training sequences in the uplink bursts; and notifying said mobile terminal with said length criteria of training sequences in the uplink bursts and said uplink timeslots.
Description
Technical field
The present invention relates to wireless communication system, relate in particular to a kind of communication means and device of adjusting training sequence and corresponding Resource Allocation Formula in the communication bursts.
Background technology
In the TDD cdma system, Midamble (being training sequence code) is the key component of the burst (or other implication) of TDD cdma system, is used for channel estimating.In traditional system, in each data burst, send Midamble.If under the low rate of change channel condition, can not need frequent channel estimating.In this case, owing to send Midamble (each data burst once) continually, can not hold more business datum.At FDD (Frequency Division Duplex, Frequency Division Duplexing (FDD)) pattern (for example, among the WCDMA, the channel estimating of dedicated channel is by each professional TS (Time Slot, time slot) " pilot tone " part carrying), " pilot tone " part of each professional TS has the Midamble identical functions with TDD (Time Division Duplex, time division duplex) pattern.So the cdma system of fdd mode faces same problem.
US6724815 discloses a kind of method and apparatus that is used for increasing by the minimizing training data data rate.EP0615352 discloses a kind of wireless communication system that uses the variable-length training sequence code.US5606580 discloses the method for regulating data block length in a kind of TDMA communication system.WO9716046 discloses a kind of variable-length burst transmission on the physical layer of multilayer transformat.
The variation of training sequence length can bring interference problem.Users different in cdma system use identical time slot by different channel code, when the training sequence in the communication bursts of different user adopts different length, then training sequence between the multi-user and data can produce interference, and fail to solve such problem in the prior art.
Therefore, need new method and apparatus to improve the problems referred to above that prior art faces.
Summary of the invention
The objective of the invention is for overcoming the problems referred to above of prior art, provide a kind of new wireless communications method, solve relevant problem simultaneously better to improve traffic data capacity.
The invention provides a kind of communication means that is used for wireless communication system, comprise step: the received signal from a portable terminal is detected, to obtain the testing result of the corresponding up channel of described received signal; According to the testing result of described up channel, determine the length criteria of training sequences in the corresponding uplink burst; According to the length criteria of training sequences in the described uplink burst, for described portable terminal distributes predetermined ascending time slot; With notify described portable terminal with length criteria of training sequences and described ascending time slot in the described described uplink burst.
The invention provides a kind of network side equipment that is used for wireless communication system, wherein said network terminal comprises a network terminal measurement mechanism, and a network terminal is determined device, and a dispensing device,
This network terminal measurement mechanism detects the received signal from portable terminal, to obtain the testing result of the corresponding up channel of described received signal; This network terminal is determined the testing result of device according to described up channel, determines the length criteria of training sequences in the corresponding uplink burst; This network terminal is determined device according to the length criteria of training sequences in the described uplink burst, for described portable terminal distributes predetermined ascending time slot; And this dispensing device is notified described portable terminal with length criteria of training sequences and described ascending time slot in the described described uplink burst.
The invention provides a kind of communication means that is used for wireless communication system, comprise step:, determine the length criteria of training sequences in the corresponding downstream burst according to downlink channel detection report from a portable terminal; According to the length criteria of training sequences in the described downlink burst, for described portable terminal distributes predetermined descending time slot; With notify described portable terminal with length criteria of training sequences in the described downlink burst and described descending time slot.
The invention provides a kind of network side equipment that is used for wireless communication system, wherein said network terminal comprises that a network terminal determines device, and a dispensing device,
This network terminal is determined device according to the downlink channel detection report from a portable terminal, determines the length criteria of training sequences in the corresponding downstream burst; This network terminal is determined device according to the length criteria of training sequences in the described downlink burst, for described portable terminal distributes predetermined descending time slot; And this dispensing device is notified described portable terminal with length criteria of training sequences in the described downlink burst and described descending time slot.
The invention provides a kind of portable terminal that is used for wireless communication system, wherein, described portable terminal comprises receiving system, and adjusting device,
This receiving system receives the notice from network side equipment, and this notice comprises length criteria of training sequences in the burst and to the distribution of time slot,
This adjusting device is provided with training sequence according to length criteria of training sequences in the burst and to the distribution of time slot.
The application of the invention, the length criteria according to training sequence code in the variation change data burst of channel quality can be used to the Radio Resource of saving to carry more business datum to improve traffic data capacity.Use the present invention, can also solve the interference problem that the change of the length criteria of training sequence code brings in the data burst according to the length adjustment time slot allocation strategy of training sequence in the burst.
By the content below in conjunction with the description of the drawings and claims, and along with understanding more comprehensively of the present invention, other purposes of the present invention and effect will become and know more and easy to understand.
Description of drawings
Preferred implementation of the present invention is described below with reference to the accompanying drawings, wherein:
Fig. 1 represents the subframe structure of TD-SCDMA (Time Division-Synchronous Code DivisionMultiple Access, Time Division-Synchronous Code Division Multiple Access);
Fig. 2 represents the structure of time slot of TD-SCDMA;
Midamble when Fig. 3 represents that a plurality of subscriber equipmenies use different Midamble length and the interference between the business datum;
Fig. 4 represents to be the particular time-slot of the user equipment allocation of 0 (not having Midamble) for use Midamble length in data burst according to an embodiment of the invention;
Fig. 5 A is the flow chart of training sequence scheme in the burst of ascending time slot according to an embodiment of the invention;
Fig. 5 B is the flow chart of training sequence scheme in the burst of descending time slot according to an embodiment of the invention;
Fig. 6 is the functional device configuration schematic diagram of UE and network according to an embodiment of the invention.
Identical label is represented identical or corresponding feature or function in institute's drawings attached.
Embodiment
In the following embodiments, the present invention is exemplarily described in conjunction with the accompanying drawings.
Principle of the present invention is below described.
For uplink burst, according to one of communication means of the present invention, at first the received signal from a portable terminal is detected, to obtain the testing result of the corresponding up channel of described received signal.According to the testing result of described up channel, determine the length criteria of training sequences in the corresponding uplink burst then.Again according to the length criteria of training sequences in the described uplink burst, for described portable terminal distributes predetermined ascending time slot.Notify described portable terminal with length criteria of training sequences and described ascending time slot in the described described uplink burst at last.
For downlink burst,,, determine the length criteria of training sequences in the corresponding downstream burst at first according to downlink channel detection report from a portable terminal according to one of communication means of the present invention.Then according to the length criteria of training sequences in the described downlink burst, for described portable terminal distributes predetermined descending time slot.Notify described portable terminal with length criteria of training sequences in the described downlink burst and described descending time slot at last.
Length criteria comprises the length of training sequence in communication means of the present invention, can also comprise the period of the length that continues the described training sequence of use.The length of training sequence is identical or close in the same length criteria.In communication process, can change the length of training sequence according to the testing result of channel quality, obtain the different communication bursts length criteria of training sequences that subscriber equipment sends or receives that is used for.For the length of training sequence is zero situation, can also change training sequence length in the same time slot according to the testing result of channel quality and be zero portable terminal number.Detection to channel can comprise SIR, SNR, or SNIR.
Wireless communication system of the present invention is that example has been carried out concrete enforcement with the CDMA mobile communication system.
In the following description, be that example is described method of the present invention with the Midamble (being training sequence) in the burst.
Midamble is the key component of burst structure in the TDD cdma system, is used for channel estimating.In traditional system, each data burst sends a Midamble.Method provided by the present invention is to adjust the length criteria of Midamble according to channel quality.Such as the length of adjusting Midamble, length can be L, 0 or 1/2L.The notion of length criteria can also comprise the period of continue using a certain length training sequence (Midamble), uses length to be L, 0 or the training sequence of 1/2L as the subframe of several successive.Below be that the situation of L and 0 is that example describes alternately to send length.For example when channel quality is stablized, for the burst in a plurality of continuous subframes, the burst in the subsequent subframe can utilize the channel estimating that burst obtained based on before.Thereby in the burst of a plurality of subframes, the user can send Midamble off and on, i.e. the training sequence length L (length is non-vanishing) of a burst in the one-period, and the length of the training sequence in the burst of other subframe is zero.In scheme provided by the present invention, the length of training sequence or the cycle of going up in the example are determined by network based testing result.The present invention also provides the signaling procedure related with relevant programme.In addition, when adopting different Midmble length criteria more than a UE, according to scheme provided by the invention, can also be by avoid the interference between Midamble and other user data for the identical different time slot of user equipment allocation of Midmble length criteria.
The application with the lower part in, be example with TD-SCDMA to provide about the necessary information of TDD system and to describe thought of the present invention.In fact, situation and other TDD cdma system that after some necessary modifications, can expand to high chip-rate 7.68Mchip/s as described herein.In addition, through some necessary modifications, same thought can expand to fdd mode.
In TDD CDMA mobile cellular system, the signal transmission is undertaken by " radio frames ".Radio frames further is divided into time slot (TS) with the information of carrying.In the TD-SCDMA system, the length of a radio frames is 10ms and is divided into two identical 5ms subframes.In each subframe, have 7 normal time slots and 3 special time slots.Fig. 1 represents the subframe structure of TD-SCDMA, and wherein TS0 and TS1 always are designated as down link and uplink time slot respectively, are respectively applied for uplink burst and downlink burst.DwPTS (Downlink Pilot Time Slot; down link pilot timeslot) and UpPTS (UplinkPilot Time Slot; uplink pilot time slot) is special-purpose down link and uplink pilot time slot; be respectively applied for down link and uplink synchronisation, GP (Guard Period) is the protection interval.
In each time slot shown in Figure 2, three fields are arranged, data division, Midamble and GP distinguish different TS.Midamble (m
1, m
2, m
3..., m
n, n is to be the Midamble length of unit with the chip) and be used as the estimation channel status.
Below describe and utilize thought of the present invention, utilize training sequence length in the length criteria to reach the effect of the transmission frequency that changes Midamble to be adapted to channel status for L or zero situation.When detecting UE or BS (Base Station, when the base station) having the good channel quality (for example channel variation is slower), need in each data burst, not send Midamble, and the channel estimating before can using is used for the data burst of those no Midamble (Midamble length is zero).Yet this change should be in conjunction with a series of signaling procedures, and for example channel status is measured and report, parameter change notification etc.For in a time slot simultaneously at several UE of usefulness, in order to eliminate the interference between local Midamble and other user's data, some schemes have been proposed among the present invention.In with the lower part, the complete procedure of Midamble length criteria of the present invention has been described.
Below describe and how to utilize the present invention program to reach change Midamble transmission frequency.
In enforcement of the present invention, realize changing the transmission frequency of Midamble according to the radio link quality that detects.If the wireless channel conditions that detects is good, perhaps almost the time under the constant situation (channel conditions changes very slow), then can reduce the Midamble transmission frequency at channel, use the Radio Resource of saving to carry more business datum then.The Midamble transmission frequency parameter (time slot allocation etc.) of regulating is to calculate according to the result who measures in network, sends signaling to UE by down link then.
The transmission frequency of above-mentioned Midamble is a kind of specific implementation of training sequence length criteria.According to concrete enforcement described here, the transmission frequency of Midamble is changed, and the subframe that has sends Midamble (length is L), and the subframe that has does not send Midamble (length is zero).The transmission cycle that also we can say Midamble has been changed.Include the subframe of Midamble and the subframe of no Midamble in the one-period.The length of Midamble is not zero in the period that has in the one-period in other words, and the length of the Midamble of the period that has is zero.
With Midamble (training sequence) the transmission cycle, with the situation of the radio link quality that detects be example, different Midamble can be set with respect to different signal quality criterions send the cycle, referring to table 1.
Table 1 Midamble sends cycle and wireless chaining status
| The wireless chaining status index (can be SIR, SNR, SNIR or other standard etc. are by the network terminal initialization.) | Midamble sends the cycle | Note |
| T 0(the threshold value baseline of supposing) | The transmission cycle F of regulation: during every F data burst, send one time Midamble. | I and j can be determined by network terminal.The observation of channel variation (time become or time constant) is also undertaken by network terminal. |
| In a measuring period, the wireless chaining status index T of measurement compares T 0Better. | Increase the above transmission cycle to F ' (for example, F '=F+i, (i=1,2,3 ... )). | |
| In a measuring period, the T of measurement compares T 0Poorer. | Reduce the above transmission cycle to F " (for example, F "=F-j, j=1,2,3 ...). | |
| The T that measures is very near T 0 | Do not change current Midamble transmission frequency. |
The scheme that a plurality of UE take a TS is simultaneously below described.
Following problem can appear when changing the Midamble field.
Therefore in fact, portable terminal can not move very fast and/or channel condition can not change very frequently under many circumstances, and to send Midamble continually be unnecessary and waste Radio Resource in some sense.Having only a UE to take under the situation of a time slot, Midamble principle of the present invention can be saved Radio Resource significantly.If take same time slot, and, there are two new problems to solve according to the Midamble transmission frequency that channel quality is regulated them yet have more than a UE.
One of problem be and business datum between dl interference.
According to principle of the present invention, down link Midamble transmission frequency should change according to transmission environment.Yet, in time slot, not sending to other if send Midamble for some UE more than a UE, the interference between Midamble and the business datum can appear.
Two of problem be and business datum between uplink channel interference.
Identical with down link, in the time slot more than a UE, other does not send if some UE send Midamble, uplink channel interference can occur.
Fig. 3 represents how interference takes place (comprising down link and up link).Suppose UE1 not send Midamble and UE3-UEn sends Midamble in identical time slot with UE2.The Midamble that can see UE3-UEn is interfering with each other with corresponding UE1 and UE2 data.This interference may cause the receiver can not demodulation UE1 and the data of UE2, and can not correctly estimate the channel parameter of UE1 and UE2.
In order to solve above problem, some additional projects have been proposed for the situation that takies a time slot more than a UE.
One of scheme is that the subscriber equipment that Midamble length is identical or close in the burst (is zero as Midamble length) distributes special time slot.
At first, the received signal from a UE is detected, to obtain the testing result of the corresponding up channel of described received signal for uplink burst.According to the testing result of the up channel that detects, determine the length criteria of the Midamble in the corresponding uplink burst then.Again according to the length criteria of training sequences in the uplink burst, for this UE distributes predetermined ascending time slot.At last with the length criteria of Midamble in the uplink burst and the ascending time slot notice UE of distribution.
For downlink burst,, determine the length criteria of the Midamble in the corresponding downstream burst at first according to downlink channel detection report from a UE.According to the length criteria of the Midamble in the described downlink burst, distribute the descending time slot of being scheduled to for UE then.At last with the length criteria of the Midamble in the downlink burst and the descending time slot notice UE of distribution.
For fear of Midamble and up link between the business datum and dl interference, can distribute special no Midamble time slot (down link and up link) to be used to not have those data burst of Midamble from different transmitters.In these special time slots, do not send Midamble, so there is not interference.
As shown in Figure 4, can distribute a uplink time slot (for example TS3) and a downlink time slots (for example TS6) respectively as no Midamble time slot.For a plurality of UE that are in the good transmission environment, when transmission/reception comprised the data of Midamble, they took a normal time slot, and when the data of the no Midamble of transmission/reception, they adopt TS3/TS6.
Note, if more UE has good channel quality and has lower Midamble transmission frequency, can be by UTRAN (UMTS Terrestrial Radio AccessNetwork, UTMS (Universal Mobile Telecommunication System, universal mobile telecommunications system) grounding wireless access network network) distributes more no Midamble time slot.Along with the quantity increase of no Midamble time slot, power system capacity can increase.
According to method provided by the present invention, at the situation of having only the shared time slot of less several UE, can be that the scheme of 0 number reduces to disturb by adjusting Midamble length, improve message transmission rate.
As shown in Figure 3, suppose in identical time slot that UE1 and UE2 send data and other UE sends Midamble, the UE the when data of UE1 and UE2 are carried out channel estimating for other can be regarded as noise.Because noise just comes from two UE, this noise is sustainable for the UE that other obtains channel characteristics.Fig. 3 adopts the solution of the present invention as an example with two UE.Adopt the quantity of the UE of the solution of the present invention suitably to increase or to reduce in practice according to qos requirement.
For UE1 and UE2, when detecting its data segment, the Midamble of other UE also can be considered as noise.Document M.J.Juntti and B.AaZhang, " Finite Memory-LengthLinear Multiuser Detection for Asynchronous CDMA Communications ", IEEE Trans.Commu., Vol.45, no.5, May 1997, pp.611-622 proposes: finally sent to ZF-BLE (zero-forced block linear equalizer more than 6-8 symbol, ZF piece linear equalizer) under the situation, the interference symbol in the processing window of multi-user detector (because multipath and asynchronous generation) almost testing result is not brought influence.If therefore suitably will not having the Midamble data burst is divided into two groups (each group is more than 8 symbols), the Midamble of other UE can be considered as multipath and disturb.By these two data groups are sent to ZF-BLE respectively, can ignore the interference of the Midamble of other UE to UE1 and UE2.
The following whole the solution of the present invention of describing.
Fig. 5 A is the flow chart of training sequence scheme in the burst of ascending time slot according to an embodiment of the invention.Fig. 5 B is the flow chart of training sequence scheme in the burst of descending time slot according to an embodiment of the invention.
Fig. 6 represents the configuration of processing unit of the present invention, and the network side equipment 100 ' that wherein is used for wireless communication system comprises a receiving system 101 ', a measurement mechanism 102 ', a definite device 103 ' and a dispensing device 104 '.Mobile terminal UE 100 comprises a receiving system 101, measurement mechanism 102, an adjusting device 103 and a dispensing device 104.
Below in conjunction with Fig. 5 A, 5B and Fig. 6 job step of the present invention and functional device are described.Because the transmission frequency of Midamble is the wireless transmission environment change according to reality, the signaling procedure related with Midamble length criteria scheme is essential.Compare with traditional scheme, the processing unit configuration of UE and network terminal should be revised in new departure.
According to an embodiment of the invention, receiving system 101 ' is from UE100 received signal (corresponding to step S0 Fig. 5 A), measurement mechanism 102 ' detects the received signal from UE100, with the testing result (finishing the function of step S1 among Fig. 5 A) that obtains the corresponding up channel of described received signal.Determine the testing result of device 103 ' according to up channel, determine that Midamble is a length criteria of training sequences in the corresponding uplink burst, be used to change it and send length, and alternatively, change the period (finishing the function of step S2 among Fig. 5 A) that it continues to use described training sequence length.Determine the length criteria of device 103 ', for UE100 distributes predetermined ascending time slot (finishing step S3 among Fig. 5 A) according to Midamble in the uplink burst of determining.Dispensing device 104 ' is with transmission frequency and the ascending time slot notice UE100 (finishing the function of step S4 among Fig. 5 A) of Midamble in the uplink burst.
In addition, according to further enforcement of the present invention, be used for the network side equipment 100 ' of wireless communication system, receiving system 101 ' receives downlink channel detection report (finishing the function of step S1A Fig. 5 B) from UE100.Determine device 103 ' according to downlink channel detection report, determine that Midamble is that length criteria of training sequences is used for changing corresponding downstream burst Midamble length criteria (finishing the function of step S2 ' among Fig. 5 B).Determine the length criteria of device 103 ', for UE100 distributes predetermined descending time slot (finishing the function of step S3 ' among Fig. 5 B) according to Midamble in the downlink burst.Dispensing device 104 ' is with Midamble length criteria in the downlink burst and described descending time slot notice UE100 (finishing the function of step S4 ' among Fig. 5 B).
The mobile terminal UE 100 that is used for wireless communication system comprises a receiving system 101, with an adjusting device 103, a measurement mechanism 102, with a dispensing device 104, this receiving system 101 receives notice from network side equipment (corresponding to step S4 and S4 ' among Fig. 5 A and Fig. 5 B in the function of receiving terminal), and this notice comprises above-mentioned Midamble length criteria and to the distribution of time slot.This adjusting device 103 receives or sends burst (corresponding to the function of step S5 and S5 ' among Fig. 5 A and Fig. 5 B) according to Midamble length criteria in the notice of being received and to the distribution of time slot.102 pairs of down channels of this measurement mechanism detect, to obtain downlink channel detection report (finishing the function of step S1 ' among Fig. 5 B), this dispensing device 104 sends to network side equipment 100 ' (finishing the pairing function of step S1A among Fig. 5 B) with examining report.
The length of training sequence can be to comprise 0 and arbitrary definite length of traditional standard length L in the burst.Below only with length be 0 and the situation (being the transmission frequency of Midamble) of L alternate be that example describes.
Being provided with of training sequence length criteria changed the transmission frequency of Midamble.According to above concrete enforcement, the transmission frequency of Midamble is changed, and the subframe that has sends Midamble, and the subframe that has does not send Midamble.The transmission cycle that also we can say Midamble has been changed.Include the subframe of Midamble and the subframe of no Midamble in the one-period.
By Fig. 5 A and 5B as can be known, length criteria of training sequences in uplink burst and the downlink burst and corresponding time interval resource all be determine according to channel detection result by network terminal and send to portable terminal by down link.Because because the characteristic of down link and up link is symmetrical basically, the uplink measurement result is almost consistent with down link in the TDD system.Therefore, network side equipment 100 ' can be determined up link Midamble length criteria, thereby correspondingly determines its transmission frequency.
The expansion of the present invention to FDD below described.
In fdd mode (for example among the WCDMA, the channel estimating of dedicated channel realizes by each business time-slot " pilot tone " part), " pilot tone " has the Midamble identical functions with tdd mode.So thought of the present invention can be applied to fdd mode.Because the different channels characteristic of up link and down link among the FDD, UE100 determines the Midamble length criteria of up links according to the measurement result of measurement mechanism 102 by adjusting device 103, and network side equipment 100 ' is determined down link Midamble length criteria according to the measurement result of measurement mechanism 102 ' by definite device 103 '.
Do not break away from design of the present invention and scope, can make many other changes or remodeling.It will be understood by those of skill in the art that to the invention is not restricted to specific execution mode that protection scope of the present invention should be determined by the content of appending claims.
Claims (28)
1. communication means that is used for wireless communication system comprises step:
(a) received signal from a portable terminal is detected, to obtain the testing result of the corresponding up channel of described received signal;
(b), determine the length criteria of training sequences in the corresponding uplink burst according to the testing result of described up channel;
(c) according to the length criteria of training sequences in the described uplink burst, for described portable terminal distributes predetermined ascending time slot; With
(d) notify described portable terminal with length criteria of training sequences in the described uplink burst and described ascending time slot.
2. according to the communication means of claim 1, wherein, described length criteria comprises the length of training sequence.
3. according to the communication means of claim 2, wherein, described length criteria also comprises the period of the length that continues the described training sequence of use.
4. according to the communication means of claim 2, wherein, the length of training sequence is identical in the same length criteria.
5. according to the communication means of claim 2, wherein, the length of training sequence is zero.
6. according to the communication means of claim 5, comprise that also changing training sequence length in the described wireless communication system according to testing result is zero portable terminal number.
7. according to the communication means of claim 2, wherein, in the described predetermined ascending time slot, all communication bursts have identical training sequence length criteria.
8. according to the communication means of claim 1, wherein, the detection of up channel is comprised SIR, SNR, or SNIR.
9. according to the communication means of claim 1, wherein, described wireless communication system is a CDMA mobile communication system.
10. network side equipment that is used for wireless communication system, wherein, described network terminal comprises a network terminal measurement mechanism, a network terminal is determined device, and dispensing device, this network terminal measurement mechanism detects the received signal from portable terminal, to obtain the testing result of the corresponding up channel of described received signal;
This network terminal is determined the testing result of device according to described up channel, determines the length criteria of training sequences in the corresponding uplink burst;
This network terminal is determined device according to the length criteria of training sequences in the described uplink burst, for described portable terminal distributes predetermined ascending time slot; And
This dispensing device is notified described portable terminal with length criteria of training sequences in the described uplink burst and described ascending time slot.
11. according to the network side equipment of claim 10, wherein, described length criteria comprises the length of training sequence.
12. according to the network side equipment of claim 11, wherein, described length criteria also comprises the period of the length that continues the described training sequence of use.
13. according to the network side equipment of claim 11, wherein, the length of training sequence is identical in the same length criteria.
14. according to the network side equipment of claim 11, wherein, the length of training sequence is zero.
15. according to the network side equipment of claim 14, this network terminal determines that it is zero portable terminal number that device also changes training sequence length in the described wireless communication system according to testing result.
16. according to the network side equipment of claim 11, wherein, in the described predetermined ascending time slot, all communication bursts have identical training sequence length criteria.
17. a communication means that is used for wireless communication system comprises step:
(a), determine the length criteria of training sequences in the corresponding downstream burst according to downlink channel detection report from a portable terminal;
(b) according to the length criteria of training sequences in the described downlink burst, for described portable terminal distributes predetermined descending time slot; With
(c) notify described portable terminal with length criteria of training sequences in the described downlink burst and described descending time slot.
18. according to the communication means of claim 17, wherein, described length criteria comprises the length of training sequence.
19. according to the communication means of claim 18, wherein, described length criteria also comprises the period of the length that continues the described training sequence of use.
20. according to the communication means of claim 18, wherein, the length of training sequence is identical in the same length criteria.
21. according to the communication means of claim 18, wherein, the length of training sequence is zero.
22., comprise that also changing training sequence length in the described wireless communication system according to testing result is zero portable terminal number according to the communication means of claim 21.
23. according to the communication means of claim 18, wherein, in the described predetermined descending time slot, all communication bursts have identical training sequence length criteria.
24., also comprise receiving a downlink channel detection report from a portable terminal according to the communication means of claim 17.
25. a network side equipment that is used for wireless communication system, wherein, described network terminal comprises that a network terminal determines device, and a dispensing device,
This network terminal is determined device according to the downlink channel detection report from a portable terminal, determines the length criteria of training sequences in the corresponding downstream burst;
This network terminal is determined device according to the length criteria of training sequences in the described downlink burst, for described portable terminal distributes predetermined descending time slot; And
This dispensing device is notified described portable terminal with length criteria of training sequences in the described downlink burst and described descending time slot.
26. according to the network side equipment of claim 25, also comprise a receiving system, be used to receive a downlink channel detection report from a portable terminal.
27. a portable terminal that is used for wireless communication system, wherein, described portable terminal comprises a receiving system and an adjusting device,
This receiving system receives the notice from network side equipment, and this notice comprises length criteria of training sequences in the burst and to the distribution of time slot,
This adjusting device receives or sends burst according to length criteria of training sequences in the burst in the notice of being received and to the distribution of time slot.
28. portable terminal according to claim 27, wherein, this portable terminal also comprises a checkout gear and a dispensing device,
This checkout gear detects down channel, and to obtain downlink channel detection report, this dispensing device sends to network side equipment with examining report.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011137857A1 (en) * | 2010-08-24 | 2011-11-10 | 华为技术有限公司 | Method, apparatus and communication system for inserting training sequence symbols |
| CN107580367A (en) * | 2016-07-04 | 2018-01-12 | 华为技术有限公司 | Channel training method and apparatus |
| CN109511121A (en) * | 2018-12-18 | 2019-03-22 | 展讯通信（上海）有限公司 | Interference elimination method and device |
| CN114640390A (en) * | 2020-12-16 | 2022-06-17 | 诺基亚通信公司 | Optical network unit activation |
-
2006
- 2006-01-19 CN CNA2006800034730A patent/CN101112114A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011137857A1 (en) * | 2010-08-24 | 2011-11-10 | 华为技术有限公司 | Method, apparatus and communication system for inserting training sequence symbols |
| CN102377704A (en) * | 2010-08-24 | 2012-03-14 | 华为技术有限公司 | Training sequence symbol insertion method and device as well as communication system |
| CN102377704B (en) * | 2010-08-24 | 2014-06-04 | 华为技术有限公司 | Training sequence symbol insertion method and device as well as communication system |
| CN107580367A (en) * | 2016-07-04 | 2018-01-12 | 华为技术有限公司 | Channel training method and apparatus |
| CN107580367B (en) * | 2016-07-04 | 2020-12-25 | 华为技术有限公司 | Channel training method and device |
| CN109511121A (en) * | 2018-12-18 | 2019-03-22 | 展讯通信（上海）有限公司 | Interference elimination method and device |
| CN114640390A (en) * | 2020-12-16 | 2022-06-17 | 诺基亚通信公司 | Optical network unit activation |
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