CN101568184B - Method and device for detecting channel quality - Google Patents
Method and device for detecting channel quality Download PDFInfo
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- CN101568184B CN101568184B CN2008101050712A CN200810105071A CN101568184B CN 101568184 B CN101568184 B CN 101568184B CN 2008101050712 A CN2008101050712 A CN 2008101050712A CN 200810105071 A CN200810105071 A CN 200810105071A CN 101568184 B CN101568184 B CN 101568184B
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- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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Abstract
The invention discloses a method and a device for detecting the channel quality. The method comprises the following steps that: channel quality detection pilot frequencies are distributed at symmetrical positions at two ends of a system band in an uplink pilot frequency time slot, and the summation of the bandwidth occupied by the channel quality detection pilot frequencies distributed in the uplink pilot frequency time slot and the bandwidth occupied by the channel quality detection pilot frequencies distributed in an uplink subframe covers the whole system bandwidth; and random access channels are distributed in the rest frequency bands in the uplink pilot frequency time slot. The method and the device can ensure that the channel quality detection of the complete system frequency band can be achieved all the time when the random access channels are distributed in the uplink pilot frequency time slot.
Description
Technical field
The present invention relates to communication technical field, particularly channel quality detection method and device.
Background technology
In Long Term Evolution (LTE, Long Term Evolution) system, there are two kinds of frame structures, are applicable to FDD (FDD) system and time division duplex (TDD) system respectively; Fig. 1 is the frame structure sketch map that is applicable to the TDD system, and is as shown in Figure 1, in this frame structure; Entire frame is called a radio frames, and length is 10ms, comprises the field of two 5ms; Comprise 5 sub-frame in each field, each subframe lengths is 1ms.Second sub-frame in each field, promptly #1 and #6 subframe are special subframe, comprise three special time slots, are respectively descending pilot frequency time slot (DwPTS), protection is (GP) and uplink pilot time slot (UpPTS) at interval.Comprise in other each subframe that two length are the time slot of 0.5ms, wherein #0 and #5 subframe are descending sub frame, together with descending pilot frequency time slot, are used for transmitting downlink data; All the other subframes are sub-frame of uplink, are used for transmit ascending data together with uplink pilot time slot.
At present, in the TDD system, network side is surveyed the channel quality of the upstream data of end side, is to realize according to the channel quality detecting pilot frequency that end side is sent; End side is transmitting channel quality detection pilot tone on the position of the channel quality detecting pilot frequency that network side distributes; Network side detects the channel quality detecting pilot frequency that receives on this position; Just can detect the quality of this position upper signal channel quality; The frequency band range that the channel quality detecting pilot frequency is covered can be detected the frequency range of channel quality exactly.
Fig. 2 is the channel allocation sketch map of existing channel quality detection method; As shown in Figure 2; Ascending control channel is distributed in the subframe 2,3,4, and is positioned at the symmetric position at band system band two ends, in each subframe; The shared frequency bandwidth of ascending control channel can be the same or different, and is the width condition of different shown in Fig. 2.
RACH can be distributed in the optional position of uplink pilot time slot; Perhaps be distributed in the mid portion except that ascending control channel in the sub-frame of uplink; And can there be one or more RACHs; In Fig. 2, a RACH is distributed in the subframe 2, and another RACH is distributed in the first half of uplink pilot time slot.
The channel quality detecting pilot frequency can be distributed in the optional position of uplink pilot time slot; Or other positions except that ascending control channel and RACH in the sub-frame of uplink; In Fig. 2, the part of channel quality detecting pilot frequency is distributed in the subframe 2, and another part is distributed in the subframe 4; With the identical frequency band range of up shared data channel occupancy in this subframe, but on time domain, separate.
Do not distribute when uplink pilot time slot under the situation of RACH; The quality detection pilot tone can be distributed arbitrarily in uplink pilot time slot; Therefore always can be so that the quality detection pilot tone of in uplink pilot time slot and subframe, distributing can cover whole band system band, thus the channel quality of realizing the holonomic system frequency band is surveyed.But; If be assigned RACH in the uplink pilot time slot; For example in channel allocation shown in Figure 2, the frequency band range that takies owing to the RACH that distributes in the uplink pilot time slot overlaps with the shared frequency band range of ascending control channel, so; At this moment distribute the quality detection pilot tone in any case; All will cause the shared frequency band range of quality detection pilot tone can not cover the whole system frequency band, and promptly must have the channel quality on the partial-band not to be detected, and then cause the operation relevant all can not carry out with this part band channel quality.
To sum up, in the present channel quality detection method,, might can't realize the channel quality detection of holonomic system frequency band if when in uplink pilot time slot, being assigned RACH.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of channel quality detection method, in the time of can guaranteeing in uplink pilot time slot, to be assigned RACH, the channel quality of holonomic system frequency band is surveyed and can be realized all the time.
Another purpose of the present invention is to provide a kind of channel quality sniffer, and in the time of can guaranteeing in uplink pilot time slot, to be assigned RACH, the channel quality of holonomic system frequency band is surveyed and can be realized all the time.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of channel quality detection method; Be applied to tdd systems; Network side distributes the position of channel quality detecting pilot frequency, RACH, ascending control channel and up shared data channel, and in uplink pilot time slot, is assigned RACH;
Network side is the location information notification end side of the channel quality detecting pilot frequency of distributing, RACH, ascending control channel and up shared data channel, and surveys according to the channel quality detecting pilot frequency that described positional information is sent on channel quality detecting pilot frequency position end side;
Channel quality detecting pilot frequency and RACH that said network side distributes comprise:
In uplink pilot time slot, be in the symmetric position allocated channel quality detection pilot tone at band system band two ends; The symmetric position that in each sub-frame of uplink, is in the band system band two ends is distributed ascending control channel; Make the frequency bandwidth of the shared frequency bandwidth of the channel quality detecting pilot frequency that distributes in the said uplink pilot time slot, smaller or equal to the frequency bandwidth of the maximum ascending control channel of the frequency bandwidth that takies more than or equal to the minimum ascending control channel of the frequency bandwidth that takies;
In all the other frequency bands of uplink pilot time slot, distribute RACH.
Preferably, saidly in all the other frequency bands of uplink pilot time slot, distribute RACH, comprising:
In all the other frequency bands of uplink pilot time slot, distribute RACH, and in sub-frame of uplink, do not distribute RACH.
Preferably, the said RACH that in all the other frequency bands of uplink pilot time slot, distributes is at least one.
Preferably, the said RACH that in all the other frequency bands of uplink pilot time slot, distributes is greater than one, and is nonseptate continuous distribution between many RACHs, perhaps is spaced dispersed and distributed between many RACHs.
Preferably, when being spaced dispersed and distributed between said many RACHs, in compartment allocated channel quality detection pilot tone.
A kind of channel quality sniffer is applied to tdd systems, comprises channel quality detecting pilot frequency distribution module, RACH distribution module, channel position information notification module and channel quality detecting module;
The channel position information notification module is used for the location information notification end side with the channel quality detecting pilot frequency of distributing, RACH, ascending control channel and up shared data channel;
The channel quality detecting module is used for according to described positional information the channel quality detecting pilot frequency that on channel quality detecting pilot frequency position, is sent by end side being surveyed;
Said channel quality detecting pilot frequency distribution module; Be used for being in the symmetric position allocated channel quality detection pilot tone at band system band two ends at uplink pilot time slot; Make the frequency bandwidth of the shared frequency bandwidth of the channel quality detecting pilot frequency that distributes in the said uplink pilot time slot, smaller or equal to the frequency bandwidth of the maximum ascending control channel of the frequency bandwidth that takies more than or equal to the minimum ascending control channel of the frequency bandwidth that takies;
Said RACH distribution module is used in all the other frequency bands of uplink pilot time slot, distributing RACH;
Wherein, ascending control channel is dispensed on the symmetric position that is in the band system band two ends in each sub-frame of uplink.
Preferably; The shared frequency bandwidth of the channel quality detecting pilot frequency of said channel quality detecting pilot frequency module assigns is more than or equal to the frequency bandwidth of the minimum ascending control channel of the frequency bandwidth that takies, smaller or equal to the frequency bandwidth of the maximum ascending control channel of the frequency bandwidth that takies.
Preferably, said RACH distribution module is not distributed RACH in sub-frame of uplink.
Preferably, the RACH that in all the other frequency bands of uplink pilot time slot, distributes of said RACH distribution module is at least one.
Preferably, said RACH distribution module is distributed many RACHs, and is nonseptate continuous distribution between many RACHs in all the other frequency bands of uplink pilot time slot, perhaps be spaced dispersed and distributed.
Preferably, when being spaced dispersed and distributed between many RACHs of said RACH module assigns, said channel quality detecting pilot frequency distribution module is further used for allocated channel quality detection pilot tone in said interval.
Visible by above-mentioned technical scheme; This symmetric position allocated channel quality detection pilot tone that in uplink pilot time slot, is in the band system band two ends of the present invention makes the summation of the shared frequency bandwidth of the channel quality detecting pilot frequency that distributes in shared frequency bandwidth of the channel quality detecting pilot frequency that distributes in the said uplink pilot time slot and the sub-frame of uplink cover the whole system frequency bandwidth; And in all the other frequency bands of uplink pilot time slot, distribute the channel quality detection method and the device of RACH, in the time of can guaranteeing in uplink pilot time slot, to be assigned RACH, the channel quality of holonomic system frequency band is surveyed and can be realized all the time.
Description of drawings
Fig. 1 is the frame structure sketch map that is applicable to the TDD system;
Fig. 2 is the channel allocation sketch map of existing channel quality detection method;
Fig. 3 is the channel quality detection method flow chart of the embodiment of the invention;
Fig. 4 is the channel allocation sketch map of the channel quality detection method of the embodiment of the invention one;
Fig. 5 is the channel allocation sketch map of the channel quality detection method of the embodiment of the invention two;
Fig. 6 is the channel allocation sketch map of the channel quality detection method of the embodiment of the invention three;
Fig. 7 is the structure chart of the channel quality sniffer of the embodiment of the invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, to further explain of the present invention.
The embodiment of the invention mainly is to carry out in the process of channel quality detection at tdd systems; Link to channel allocation is improved; In uplink pilot time slot, must distribute under the prerequisite of RACH; In uplink pilot time slot, be in the symmetric position allocated channel quality detection pilot tone at band system band two ends, make the summation of the shared frequency bandwidth of the quality detection pilot tone of distributing in shared frequency bandwidth of the channel quality detecting pilot frequency that distributes in the said uplink pilot time slot and the sub-frame of uplink cover the whole system frequency bandwidth; And in all the other frequency bands of uplink pilot time slot, distribute RACH.The frequency bandwidth that the channel quality detecting pilot frequency is covered covers the whole system frequency band, thereby the channel quality detection that guarantees the holonomic system frequency band can realize all the time.
Fig. 3 is the channel quality detection method flow chart of the embodiment of the invention, and as shown in Figure 4, this flow process may further comprise the steps:
The concrete implementation method of step 302 and step 303 is not the problem that the present invention will discuss, and therefore repeats no more here, below will introduce the specific embodiment of channel allocation in the step 301.
Embodiment one
Fig. 4 is the channel allocation sketch map of the channel quality detection method of the embodiment of the invention one; As shown in Figure 4, ascending control channel is distributed in the subframe 2,3,4, and is positioned at the symmetric position at band system band two ends; And in each subframe, the frequency bandwidth difference that ascending control channel is shared.
The channel quality detecting pilot frequency is distributed in sub-frame of uplink and the uplink pilot time slot; Wherein, The some of channel quality detecting pilot frequency is distributed in the subframe 4; Another part is distributed in the symmetric position that is in the band system band two ends in the uplink pilot time slot, and makes the summation of the shared frequency bandwidth of the channel quality detecting pilot frequency that distributes in shared frequency bandwidth of the channel quality detecting pilot frequency that distributes in the uplink pilot time slot and the subframe 4 cover the whole system frequency bandwidth.
The frequency bandwidth that the ascending control channel of distribution takies in the shared frequency bandwidth of the channel quality detecting pilot frequency that distributes in the uplink pilot time slot among Fig. 4 and the subframe 2 is identical; Because the shared frequency bandwidth of channel quality detecting pilot frequency that distributes in the subframe 4 is that band system band deducts the shared frequency bandwidth of ascending control channel that distributes in this subframe; And the shared frequency bandwidth of ascending control channel that distributes in the subframe 4 is minimum in 3 sub-frame; Therefore as long as the frequency bandwidth that the channel quality detecting pilot frequency that in uplink pilot time slot, distributes is shared can guarantee to cover whole band system band identical or wideer with the shared frequency bandwidth of the ascending control channel in the subframe 4.
Certainly; Preferable mode can be to make the frequency bandwidth of the shared frequency bandwidth of the channel quality detecting pilot frequency that distributes in the uplink pilot time slot more than or equal to the minimum ascending control channel of the frequency bandwidth that takies, smaller or equal to the frequency bandwidth of the maximum ascending control channel of the frequency bandwidth that takies.Simpler method is to make the shared frequency bandwidth of channel quality detecting pilot frequency that distributes in the uplink pilot time slot, the frequency bandwidth of the ascending control channel that the frequency bandwidth that equals to take is maximum.
RACH can be distributed in the uplink pilot time slot, in the frequency band except that the channel quality detecting pilot frequency, and the mid portion of uplink pilot time slot among Fig. 4 just.RACH can distribute arbitrarily in the frequency band in this section as required, and can not distribute RACH in the subframe, and the benefit of doing like this is to reduce the signaling consumption that in ascending control channel, is used to indicate the RACH position in the subframe.Certainly, in subframe, also distribute RACH also to be fine simultaneously.
Up shared data channel allocation in subframe 2,3,4 in above-mentioned ascending control channel, channel quality detecting pilot frequency and the frequency band the RACH.
In fact, when in uplink pilot time slot, distributing RACH among the embodiment one, can also distribute many RACHs, be nonseptate continuous distribution between these RACHs, perhaps spaced dispersed and distributed.
Embodiment two
Fig. 5 is the channel allocation sketch map of the channel quality detection method of the embodiment of the invention two, and is as shown in Figure 5, and the difference of present embodiment and embodiment one is; The RACH that distributes in the uplink pilot time slot is two, and the certain frequency band of midfeather, promptly spaced dispersed and distributed; This part frequency band can not distribute as keeping frequency band; Certainly, if desired, this part frequency band also can be distributed to the channel quality detecting pilot frequency.The situation of more RACHs has just no longer detailed by that analogy here.
Embodiment three
Fig. 6 is the channel allocation sketch map of the channel quality detection method of the embodiment of the invention three; As shown in Figure 6, the difference of present embodiment and embodiment one is that the RACH that distributes in the uplink pilot time slot is three; And the centre is separated continuously, promptly nonseptate continuous distribution.Article two, the situation of RACH or more RACHs has just no longer detailed by that analogy here.
Fig. 7 is the structure chart of the channel quality sniffer of the embodiment of the invention; As shown in Figure 7; This device is arranged on network side, comprising: channel quality detecting pilot frequency distribution module 701, RACH distribution module 702, channel position information notification module 703 and channel quality detecting module 704.
Wherein, Channel quality detecting pilot frequency distribution module 701; Be used for being in the symmetric position allocated channel quality detection pilot tone at band system band two ends, make the summation of the shared frequency bandwidth of the quality detection pilot tone of distributing in shared frequency bandwidth of the channel quality detecting pilot frequency that distributes in the said uplink pilot time slot and the sub-frame of uplink cover the whole system frequency bandwidth at uplink pilot time slot.
Channel position information notification module 703 is used for the location information notification end side with the channel quality detecting pilot frequency of distributing, RACH, ascending control channel and up shared data channel.
Channel quality detecting module 704 is used for according to said channel quality detecting pilot frequency distribution module 701, and the positional information of the channel quality detecting pilot frequency of distribution is surveyed the channel quality detecting pilot frequency that on channel quality detecting pilot frequency position, is sent by end side.
Preferably; When quality detection pilot frequency allocation module 701 distributes the quality detection pilot tone; The summation of the frequency bandwidth that the quality detection pilot tone of distributing in frequency bandwidth that the channel quality detecting pilot frequency that in making said uplink pilot time slot, distributes is shared and the sub-frame of uplink is shared covers the whole system frequency bandwidth; Also must make the frequency bandwidth of the shared frequency bandwidth of the channel quality detecting pilot frequency that distributes in the said uplink pilot time slot, smaller or equal to the frequency bandwidth of the maximum ascending control channel of the frequency bandwidth that takies more than or equal to the minimum ascending control channel of the frequency bandwidth that takies.
Preferably, RACH distribution module 702 is not distributed RACH in sub-frame of uplink.
Preferably, the RACH that in all the other frequency bands of uplink pilot time slot, distributes of RACH distribution module 702 is at least one.
Preferably; When RACH distribution module 702 is distributed many RACHs in all the other frequency bands of uplink pilot time slot; Can be nonseptate continuous distribution between many RACHs, perhaps be spaced dispersed and distributed between many RACHs.In addition, when being spaced dispersed and distributed, quality detection pilot frequency allocation module 701 also can be in these compartments allocated channel quality detection pilot tone.
Visible by the above embodiments; This symmetric position allocated channel quality detection pilot tone that in uplink pilot time slot, is in the band system band two ends of the present invention makes the summation of the shared frequency bandwidth of the channel quality detecting pilot frequency that distributes in shared frequency bandwidth of the channel quality detecting pilot frequency that distributes in the said uplink pilot time slot and the sub-frame of uplink cover the whole system frequency bandwidth; And in all the other frequency bands of uplink pilot time slot, distribute the channel quality detection method and the device of RACH, in the time of can guaranteeing in uplink pilot time slot, to be assigned RACH, the channel quality of holonomic system frequency band is surveyed and can be realized all the time; And, in uplink pilot time slot, distribute RACH, and in subframe, do not distribute RACH, can also save the signaling consumption that is used to indicate the RACH position in the ascending control channel.
Institute is understood that; The above is merely preferred embodiments of the present invention, and is not used in qualification protection scope of the present invention, and is all within spirit of the present invention and principle; Any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. channel quality detection method; Be applied to tdd systems; Network side distributes the position of channel quality detecting pilot frequency, RACH, ascending control channel and up shared data channel, and in uplink pilot time slot, is assigned RACH;
Network side is the location information notification end side of the channel quality detecting pilot frequency of distributing, RACH, ascending control channel and up shared data channel, and surveys according to the channel quality detecting pilot frequency that described positional information is sent on channel quality detecting pilot frequency position end side;
It is characterized in that channel quality detecting pilot frequency and RACH that said network side distributes comprise:
In uplink pilot time slot, be in the symmetric position allocated channel quality detection pilot tone at band system band two ends; The symmetric position that in each sub-frame of uplink, is in the band system band two ends is distributed ascending control channel; Make the frequency bandwidth of the shared frequency bandwidth of the channel quality detecting pilot frequency that distributes in the said uplink pilot time slot, smaller or equal to the frequency bandwidth of the maximum ascending control channel of the frequency bandwidth that takies more than or equal to the minimum ascending control channel of the frequency bandwidth that takies;
In all the other frequency bands of uplink pilot time slot, distribute RACH.
2. channel quality detection method as claimed in claim 1 is characterized in that, saidly in all the other frequency bands of uplink pilot time slot, distributes RACH, comprising:
In all the other frequency bands of uplink pilot time slot, distribute RACH, and in sub-frame of uplink, do not distribute RACH.
3. according to claim 1 or claim 2 channel quality detection method is characterized in that the said RACH that in all the other frequency bands of uplink pilot time slot, distributes is at least one.
4. channel quality detection method as claimed in claim 3; It is characterized in that; The said RACH that in all the other frequency bands of uplink pilot time slot, distributes is greater than one; And be nonseptate continuous distribution between many RACHs, perhaps be spaced dispersed and distributed between many RACHs.
5. channel quality detection method as claimed in claim 4 is characterized in that, when being spaced dispersed and distributed between said many RACHs, in compartment allocated channel quality detection pilot tone.
6. a channel quality sniffer is applied to tdd systems, comprises channel quality detecting pilot frequency distribution module, RACH distribution module, channel position information notification module and channel quality detecting module;
The channel position information notification module is used for the location information notification end side with the channel quality detecting pilot frequency of distributing, RACH, ascending control channel and up shared data channel;
The channel quality detecting module is used for according to described positional information the channel quality detecting pilot frequency that on channel quality detecting pilot frequency position, is sent by end side being surveyed;
It is characterized in that:
Said channel quality detecting pilot frequency distribution module; Be used for being in the symmetric position allocated channel quality detection pilot tone at band system band two ends at uplink pilot time slot; Make the frequency bandwidth of the shared frequency bandwidth of the channel quality detecting pilot frequency that distributes in the said uplink pilot time slot, smaller or equal to the frequency bandwidth of the maximum ascending control channel of the frequency bandwidth that takies more than or equal to the minimum ascending control channel of the frequency bandwidth that takies;
Said RACH distribution module is used in all the other frequency bands of uplink pilot time slot, distributing RACH;
Wherein, ascending control channel is dispensed on the symmetric position that is in the band system band two ends in each sub-frame of uplink.
7. channel quality sniffer as claimed in claim 6 is characterized in that, said RACH distribution module is not distributed RACH in sub-frame of uplink.
8. like claim 6 or 7 described channel quality sniffers, it is characterized in that the RACH that said RACH distribution module is distributed is at least one in all the other frequency bands of uplink pilot time slot.
9. channel quality sniffer as claimed in claim 8; It is characterized in that; Said RACH distribution module; In all the other frequency bands of uplink pilot time slot, distribute many RACHs, and be nonseptate continuous distribution between many RACHs, perhaps be spaced dispersed and distributed.
10. channel quality sniffer as claimed in claim 9; It is characterized in that; When being spaced dispersed and distributed between many RACHs of said RACH module assigns; Said channel quality detecting pilot frequency distribution module is further used for allocated channel quality detection pilot tone in said interval.
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| CN2008101050712A CN101568184B (en) | 2008-04-25 | 2008-04-25 | Method and device for detecting channel quality |
| PCT/CN2009/071466 WO2009129754A1 (en) | 2008-04-25 | 2009-04-24 | Method and device for channel quality detection |
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| CN2008101050712A CN101568184B (en) | 2008-04-25 | 2008-04-25 | Method and device for detecting channel quality |
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| CN101568184B true CN101568184B (en) | 2012-01-04 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101005326A (en) * | 2006-01-18 | 2007-07-25 | 华为技术有限公司 | Up reasource distributing method and radio communication system |
| CN101043256A (en) * | 2006-03-23 | 2007-09-26 | 大唐移动通信设备有限公司 | User access method for TDD mode |
| US20070293233A1 (en) * | 2006-06-19 | 2007-12-20 | Nec Corporation | Method for measuring channel quality and base station in mobile communications system |
| CN101159479A (en) * | 2007-11-09 | 2008-04-09 | 中兴通讯股份有限公司 | Method of confecting special time slot in TDD system |
| CN101162987A (en) * | 2007-11-10 | 2008-04-16 | 中兴通讯股份有限公司 | Method of transmitting uplink special time slot of TDD system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005326A (en) * | 2006-01-18 | 2007-07-25 | 华为技术有限公司 | Up reasource distributing method and radio communication system |
| CN101043256A (en) * | 2006-03-23 | 2007-09-26 | 大唐移动通信设备有限公司 | User access method for TDD mode |
| US20070293233A1 (en) * | 2006-06-19 | 2007-12-20 | Nec Corporation | Method for measuring channel quality and base station in mobile communications system |
| CN101159479A (en) * | 2007-11-09 | 2008-04-09 | 中兴通讯股份有限公司 | Method of confecting special time slot in TDD system |
| CN101162987A (en) * | 2007-11-10 | 2008-04-16 | 中兴通讯股份有限公司 | Method of transmitting uplink special time slot of TDD system |
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| WO2009129754A1 (en) | 2009-10-29 |
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