CN101841817A - Method for configuring signal channel measurement pilot frequency - Google Patents
Method for configuring signal channel measurement pilot frequency Download PDFInfo
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- CN101841817A CN101841817A CN200910080375A CN200910080375A CN101841817A CN 101841817 A CN101841817 A CN 101841817A CN 200910080375 A CN200910080375 A CN 200910080375A CN 200910080375 A CN200910080375 A CN 200910080375A CN 101841817 A CN101841817 A CN 101841817A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- 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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0023—Interference mitigation or co-ordination
- H04J11/005—Interference mitigation or co-ordination of intercell interference
- H04J11/0053—Interference mitigation or co-ordination of intercell interference using co-ordinated multipoint transmission/reception
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
- H04L5/0035—Resource allocation in a cooperative multipoint environment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0202—Channel estimation
- H04L25/0224—Channel estimation using sounding signals
- H04L25/0226—Channel estimation using sounding signals sounding signals per se
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
Abstract
The invention discloses a method for configuring a signal channel measurement pilot frequency. The sending density of the signal channel measurement pilot frequency on an LTE private resource or an LTE/LTE-A shared resource of an LTE-A system is different from that on an LTE-A private resource. So, the scheme of the invention can maintain the sending of a common pilot frequency of an LTE system, and has a very small influence on an LTE user. The scheme of the invention not only can well ensure the compatibility to the LTE system, but also takes the promotion of LTE-A user performance into consideration. In the LTE/LTE-A shared resource, the signal channel measurement pilot frequency in the scheme adopts a sparser configuration, reduces the probability of degradation of LTE user performance, and simultaneously can meet the signal channel measurement requirements when a low-speed LTE-A user uses COMP and high-order MIMO. The configuration mode, provided by the scheme of the invention, of adopting different signal channel measurement pilot frequencies for different resources can well meet different pilot frequency density requirements of low-speed and high-speed users.
Description
Technical field
The present invention relates to mobile communication technology, be meant a kind of collocation method of channel measurement pilot frequency especially.
Background technology
In order to improve the throughput of sub-district, carry out the interference coordination of minizone, the new generation of wireless way system, as senior Long Term Evolution (LTE-A or LTE-Advance, Long-Term Evolution Advance) system, senior international wireless communication (IMT-A or IMT-Advance, International Mobile Telecommunication advance) system etc. has all introduced the cooperation transmission technology (COMP, Coordinate Multipoint Transmission and Reception) of network level.
In the implementation of present LTE-A system, proposed LTE and LTE-A and can adopt the mode of Time Division Multiplexing or frequency division multiplexing (FDM) to carry out resource division.Under the TDM mode, time resource can be divided into special-purpose (LTE Only) subframe of Long Term Evolution (LTE, Long-Term Evolution), the shared subframe of LTE/LTE-A and LTE-A special use (LTE-A only) subframe, shown in Figure 1A; Frequency resource can be divided into the LTE dedicated frequency under the FDM mode, the LTE/LTE-A shared frequency, the LTE-A dedicated frequency is shown in Figure 1B.The LTE private resource is that only LTE user can carry out the resource of service dispatching thereon; The LTE-A private resource is that only LTE-A user can carry out the resource of service dispatching thereon; The LTE/LTE-A common source is LTE user or LTE-A user or LTE user and the LTE-A resource that can carry out service dispatching per family thereon.
Two kinds of pilot tones of LTE-A system have been defined at present: channel measurement pilot frequency (CSI-RS) and demodulation pilot frequency (DMRS), wherein clear and definite predetermined channel measurement pilot frequency is cell-specific (cell-specific), on running time-frequency resource, distribute more sparse with respect to demodulation pilot frequency, but, how channel measurement pilot frequency disposes in the LTE-A system is not done clearly regulation, increases the uncertainty of channel measurement pilot frequency related realization scheme greatly.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of collocation method of channel measurement pilot frequency, guarantees the compatibility to LTE user, and promotes LTE-A user's performance.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of collocation method of channel measurement pilot frequency, this method comprises: the Long Term Evolution LTE private resource in the senior Long Term Evolution LTE-A system or the transmission density of LTE/LTE-A common source upper signal channel measurement pilot frequency are different from the transmission density of LTE-A private resource upper signal channel measurement pilot frequency.
This method comprises: the configuration according to the LTE system on the LTE private resource sends whole public guide frequencies, not the transmitting channel measurement pilot frequency; And/or the configuration according to the LTE system on the full range band of LTE/LTE-A common source sends whole public guide frequencies.
The described transmission on the LTE/LTE-A common source after whole public guide frequencies further comprises: reuse public guide frequency that antenna port 0,1,2,3 the sends channel measurement pilot frequency as described antenna port 0,1,2,3.
This method comprises: on the LTE/LTE-A common source, the channel measurement pilot frequency of antenna port 4,5,6,7 is no more than the minimum transmission number of times of public guide frequency under the frequency density of setting at the average transmission number of times under the frequency density of setting.
Described steps A realizes at interval by the transmission of high-rise configurating channel measurement pilot frequency.
This method comprises: on the LTE-A private resource, channel measurement pilot frequency every frame under the frequency density of setting sends once at least.
This method further comprises: on the LTE-A private resource, the public guide frequency of LTE system configuration sends on preceding two symbols of each subframe, and the channel measurement pilot frequency of antenna port 4,5,6,7 sends on all the other symbols of each subframe.
After the described transmission public guide frequency, further comprise: reuse the channel measurement pilot frequency of the public guide frequency of antenna port 0,1,2,3 transmissions as antenna port 0,1,2,3.
This method further comprises: under the frequency density of setting, total number of the channel measurement pilot frequency that sends on the LTE-A private resource is less than total number of the public guide frequency that disposes in the LTE system.
This method further comprises: the total number of channel measurement pilot frequency that sends on more than the frame full range band at the LTE/LTE-A common source in total number of the channel measurement pilot frequency that sends on the frame full range band of LTE-A private resource.
According to above description as seen, the present invention program can keep the transmission of LTE system public guide frequency, and is very little to LTE user's influence.The scheme that the present invention proposes both can fine assurance to the compatibility of LTE system, also consider lifting to the LTE-A user performance.In the LTE/LTE-A common source, channel measurement pilot frequency among the present invention program has adopted more sparse configuration, reduced possibility, the channel measurement requirement in the time of can also satisfying low speed LTE-A user simultaneously and use COMP and high-order mimo to LTE user performance degradation.What propose among the present invention program adopts different channel measurement pilot frequency configuration modes at different resource, can satisfy low speed and highspeed user's different pilot density demands better.
Description of drawings
Figure 1A is a resource division schematic diagram under the TDM mode;
Figure 1B is a resource division schematic diagram under the FDM mode;
Fig. 2 A sends the pattern schematic diagram for the public guide frequency under the normal cyclic prefix frame structure;
Fig. 2 B is that the public guide frequency under the long loop prefix frame structure sends the pattern schematic diagram;
Fig. 3 A is that the channel measurement pilot frequency under the normal cyclic prefix frame structure sends the pattern schematic diagram in the embodiment of the invention one;
Fig. 3 B is that the channel measurement pilot frequency under the long loop prefix frame structure sends the pattern schematic diagram in the embodiment of the invention one;
Fig. 4 is that channel measurement pilot frequency sends the pattern schematic diagram in the embodiment of the invention two.
Embodiment
Among the present invention, on the one hand, in order to realize LTE user's backward compatibility better, and avoid the influence of channel measurement pilot frequency to original public guide frequency (CRS) and descending special pilot frequency, channel measurement pilot frequency on the LTE scheduled resources, be should be sparse as far as possible on LTE private resource or the LTE/LTE-A common source; On the other hand, in order to reduce the LTE-A system pilot, and suitably increase channel measurement pilot frequency, in order to improve systematic function, the configuration of channel measurement pilot frequency should be considered the optimization to the LTE-A systematic function emphatically, and break away from the restriction of LTE system public guide frequency and descending special pilot frequency to the configurating channel measurement pilot frequency, the collocation method of channel measurement pilot frequency is: the transmission density of LTE private resource in the LTE-A system or LTE/LTE-A common source upper signal channel measurement pilot frequency should be different with the transmission density of LTE-A private resource upper signal channel measurement pilot frequency.Below specific implementation is described.
For the LTE private resource in the LTE-A system, only need to support measurement and the demodulation of LTE user to channel, and LTE user also can't discern the channel measurement pilot frequency of new configuration, therefore, the LTE private resource should keep the public guide frequency configuration of LTE system, be that the configuration according to the LTE system sends whole public guide frequencies on the LTE private resource, transmitting channel measurement pilot frequency not.
For the LTE/LTE-A common source in the LTE-A system, in order to support measurement and the demodulation of LTE user, reduce influence to LTE user to channel, the configuration according to the LTE system on the full range band of LTE/LTE-A common source sends whole public guide frequencies.
For the LTE/LTE-A common source in the LTE-A system, reuse the channel measurement pilot frequency of the public guide frequency of main antenna port transmission as the main antenna port.
For the LTE/LTE-A common source in the LTE-A system, measure under the situation of demand at COMP that satisfies low speed LTE-A user and high-order multiple-input, multiple-output (MIMO), in order to reduce the influence to the LTE system, channel measurement pilot frequency need be no more than the minimum transmission number of times of public guide frequency under the frequency density of setting at the average transmission number of times under the frequency density of setting.The minimum transmission number of times of public guide frequency under the frequency density of setting can be 4 times.Channel measurement pilot frequency can realize that in the specific implementation that the average transmission number of times under the frequency density of setting is no more than the minimum transmission number of times of public guide frequency under the frequency density of setting the transmission of channel measurement pilot frequency can subframe be a unit at interval at interval by the transmission of high-rise configurating channel measurement pilot frequency.
For the LTE-A private resource in the LTE-A system, the channel measurement pilot frequency of unnecessary antenna port need send once by every frame under the frequency density of setting at least on the LTE-A private resource.
For the LTE-A private resource in the LTE-A system, owing to stipulate in the LTE system, the public guide frequency that preceding two symbols of each subframe send is used for the measurement and the demodulation of Physical Downlink Control Channel (PDCCH), and this is defined in the LTE-A system and stands good, therefore, the public guide frequency of LTE system configuration sends on preceding two symbols of each subframe, and channel measurement pilot frequency sends on all the other symbols of each subframe.Because public guide frequency need not to send, and therefore, can improve LTE-A user's single-link throughput, and improve the performance gain that pilot-frequency expense is brought on each symbol.Further, in order to obtain complete channel information, every antenna port is all answered the transmitting channel measurement pilot frequency, and therefore, the public guide frequency that preceding two symbols of main antenna port can be sent is as the channel measurement pilot frequency of main antenna port.Described symbol can be OFDM (OFDM) symbol.
For the LTE-A private resource in the LTE-A system, channel measurement pilot frequency is sending on all the other symbols of each subframe and need satisfy: under the frequency density of setting, total number of the channel measurement pilot frequency that sends on the LTE-A private resource is less than total number of the public guide frequency that disposes in the LTE system.Total number of the public guide frequency that disposes in the LTE system can be 24.
If the channel measurement pilot frequency that sends on the LTE/LTE-A common source is too much, LTE user can't discern, and will reduce LTE user's performance, and therefore, the channel measurement pilot frequency on the LTE/LTE-A common source should be sparse as much as possible.In order better to obtain channel information, improve the performance of LTE-A user COMP and high-order mimo, with respect to the LTE/LTE-A common source, can suitably increase the number of the channel measurement pilot frequency that sends on the LTE-A private resource.That is to say the total number of channel measurement pilot frequency that unnecessary antenna port sends on more than the frame full range band at the LTE/LTE-A common source in total number of the channel measurement pilot frequency that sends on the frame full range band of LTE-A private resource.
The frequency density of the above setting can be 12 subcarriers.Above-described unnecessary antenna port is that like this, the main antenna port can refer to antenna port 0,1,2,3 for the main antenna port that sends public guide frequency in the LTE system, and unnecessary antenna port can refer to antenna port 4,5,6,7.
8 antennas of the maximum support of LTE-A system, antenna port is respectively 0,1,2,3,4,5,6 and 7.The pilot tone pattern of the public guide frequency of antenna port 0,1,2,3 in the LTE system defines, shown in Fig. 2 A or Fig. 2 B, the public guide frequency that Fig. 2 A is depicted as under the normal cyclic prefix frame structure sends pattern, the public guide frequency that Fig. 2 B is depicted as under the long loop prefix frame structure sends pattern, wherein
Be the public guide frequency of antenna port 0 transmission,
Be the public guide frequency of antenna port 1 transmission,
Be the public guide frequency of antenna port 2 transmissions,
Public guide frequency for antenna port 3 transmissions.In order to obtain complete channel information, every antenna port is all answered the transmitting channel measurement pilot frequency, and therefore, the antenna port that the channel measurement pilot frequency correspondence of LTE-A support is set is 0,1,2,3,4,5,6 and 7, comes respectively corresponding 8 antenna ports.Be further described below by of the realization of two specific embodiments the present invention program.
Specific embodiment one
In the present embodiment, be LTE private resource and LTE-A private resource with the resource division in the LTE system.
Configuration according to the LTE system on the LTE private resource sends whole public guide frequencies, transmitting channel measurement pilot frequency not, and the transmission pattern of public guide frequency is shown in Fig. 2 A or Fig. 2 B.
On the LTE-A private resource, the public guide frequency of LTE system configuration sends on preceding two symbols of each subframe, channel measurement pilot frequency sends on all the other symbols of each subframe, and the public guide frequency that preceding two symbols are sent is as the channel measurement pilot frequency of antenna port 0,1,2,3.
For the LTE-A private resource, when channel measurement pilot frequency sends on all the other symbols of each subframe, each Physical Resource Block of channel measurement pilot frequency (RB) of antenna port 4,5,6,7 on average sends 2 times, like this, total number of the channel measurement pilot frequency that sends in per 12 subcarriers is 8, concrete mapping position is shown in Fig. 3 A or Fig. 3 B, wherein
Be the channel measurement pilot frequency of antenna port 4 transmissions,
Be the channel measurement pilot frequency of antenna port 5 transmissions,
Be the channel measurement pilot frequency of antenna port 6 transmissions,
Channel measurement pilot frequency for antenna port 7 transmissions.
In addition, total number of the channel measurement pilot frequency that sends on the LTE-A private resource is less than total number of the public guide frequency that disposes in the LTE system.
Specific embodiment two
In the present embodiment, be LTE/LTE-A common source and LTE-A private resource with the resource division in the LTE system.
Configuration according to the LTE system on the full range band of LTE/LTE-A common source sends whole public guide frequencies, and reuses the channel measurement pilot frequency of the public guide frequency of antenna port 0,1,2,3 transmissions as antenna port 0,1,2,3.
On the LTE/LTE-A common source, per 12 subcarriers of channel measurement pilot frequency on average send 1 time.The transmission of channel measurement pilot frequency is a unit with the subframe at interval, and this transmission can be disposed by high level at interval, and will send arranged spaced as high level is 1ms, 2ms, 5ms, 10ms etc., and the transmission pattern of channel measurement pilot frequency as shown in Figure 4.
On the LTE-A private resource, the public guide frequency of LTE system configuration sends on preceding two symbols of each subframe, channel measurement pilot frequency sends on all the other symbols of each subframe, and the public guide frequency that preceding two symbols are sent is as the channel measurement pilot frequency of antenna port 0,1,2,3.
On the LTE-A private resource, antenna port 4,5, total number that 6,7 channel measurement pilot frequency sends in per 12 subcarriers equals 1, sends pattern as shown in Figure 4.
Because the channel measurement pilot frequency of antenna port 4,5,6,7 is that every frame all sends on the LTE-A private resource, and might be that the frame of every setting quantity sends once on the LTE/LTE-A common source, therefore, from long-time statistical, total number of the channel measurement pilot frequency that antenna port 4,5,6,7 sends on the frame full range band of total number more than the LTE/LTE-A common source of the channel measurement pilot frequency that sends on the frame full range band of LTE-A private resource.
The above resource both can be time resource, also can be frequency resource.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.
Claims (10)
1. the collocation method of a channel measurement pilot frequency is characterized in that, this method comprises:
The Long Term Evolution LTE private resource in the senior Long Term Evolution LTE-A system or the transmission density of LTE/LTE-A common source upper signal channel measurement pilot frequency are different from the transmission density of LTE-A private resource upper signal channel measurement pilot frequency.
2. method according to claim 1 is characterized in that, this method comprises:
Configuration according to the LTE system on the LTE private resource sends whole public guide frequencies, not the transmitting channel measurement pilot frequency; And/or,
Configuration according to the LTE system on the full range band of LTE/LTE-A common source sends whole public guide frequencies.
3. method according to claim 2, it is characterized in that, the described transmission on the LTE/LTE-A common source after whole public guide frequencies further comprises: reuse public guide frequency that antenna port 0,1,2,3 the sends channel measurement pilot frequency as described antenna port 0,1,2,3.
4. according to claim 1 or 3 described methods, it is characterized in that this method comprises:
On the LTE/LTE-A common source, the channel measurement pilot frequency of antenna port 4,5,6,7 is no more than the minimum transmission number of times of public guide frequency under the frequency density of setting at the average transmission number of times under the frequency density of setting.
5. method according to claim 4 is characterized in that described steps A realizes at interval by the transmission of high-rise configurating channel measurement pilot frequency.
6. method according to claim 1 is characterized in that, this method comprises: on the LTE-A private resource, channel measurement pilot frequency every frame under the frequency density of setting sends once at least.
7. method according to claim 6, it is characterized in that, this method further comprises: on the LTE-A private resource, the public guide frequency of LTE system configuration sends on preceding two symbols of each subframe, and the channel measurement pilot frequency of antenna port 4,5,6,7 sends on all the other symbols of each subframe.
8. method according to claim 7 is characterized in that, after the described transmission public guide frequency, further comprises: reuse the channel measurement pilot frequency of the public guide frequency of antenna port 0,1,2,3 transmissions as antenna port 0,1,2,3.
9. method according to claim 7 is characterized in that, this method further comprises: under the frequency density of setting, total number of the channel measurement pilot frequency that sends on the LTE-A private resource is less than total number of the public guide frequency that disposes in the LTE system.
10. according to claim 1 or 6 described methods, it is characterized in that this method further comprises: the total number of channel measurement pilot frequency that sends on more than a frame full range band in total number of the channel measurement pilot frequency that sends on the frame full range band of LTE-A private resource at the LTE/LTE-A common source.
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| CN 200910080375 CN101841817B (en) | 2009-03-20 | 2009-03-20 | Method for configuring signal channel measurement pilot frequency |
| PCT/CN2010/071079 WO2010105555A1 (en) | 2009-03-20 | 2010-03-16 | Configuration method for channel measurement pilot |
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| CN 200910080375 CN101841817B (en) | 2009-03-20 | 2009-03-20 | Method for configuring signal channel measurement pilot frequency |
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Cited By (4)
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| CN105827383A (en) * | 2011-03-25 | 2016-08-03 | 北京新岸线移动多媒体技术有限公司 | Method and device for configuring pilot frequency in wireless communication system |
| CN106559199A (en) * | 2015-09-25 | 2017-04-05 | 中兴通讯股份有限公司 | A kind of method and device of configurating channel state measurement pilot tone |
| CN108259146A (en) * | 2016-12-28 | 2018-07-06 | 华为技术有限公司 | The transmission method and equipment of a kind of measurement pilot signals |
| CN109155711A (en) * | 2016-05-12 | 2019-01-04 | 株式会社Ntt都科摩 | Reference signal sending method, detection method, base station and mobile station |
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| US10440693B2 (en) | 2016-11-04 | 2019-10-08 | At&T Intellectual Property I, L.P. | Asynchronous multi-point transmission schemes |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105827383A (en) * | 2011-03-25 | 2016-08-03 | 北京新岸线移动多媒体技术有限公司 | Method and device for configuring pilot frequency in wireless communication system |
| CN105827383B (en) * | 2011-03-25 | 2019-03-15 | 北京新岸线移动多媒体技术有限公司 | The configuration method and device of pilot frequency in wireless communication system |
| CN106559199A (en) * | 2015-09-25 | 2017-04-05 | 中兴通讯股份有限公司 | A kind of method and device of configurating channel state measurement pilot tone |
| US11233611B2 (en) | 2015-09-25 | 2022-01-25 | Xi'an Zhoungxing New Software Co.Ltd. | Method and apparatus for configuring channel state information- reference signal |
| CN109155711A (en) * | 2016-05-12 | 2019-01-04 | 株式会社Ntt都科摩 | Reference signal sending method, detection method, base station and mobile station |
| CN109155711B (en) * | 2016-05-12 | 2022-02-18 | 株式会社Ntt都科摩 | Reference signal sending method, detection method, base station and mobile station |
| CN108259146A (en) * | 2016-12-28 | 2018-07-06 | 华为技术有限公司 | The transmission method and equipment of a kind of measurement pilot signals |
| US10972245B2 (en) | 2016-12-28 | 2021-04-06 | Huawei Technologies Co., Ltd. | Method and device for transmitting measurement pilot signal |
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| CN101841817B (en) | 2013-09-11 |
| WO2010105555A1 (en) | 2010-09-23 |
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Application publication date: 20100922 Assignee: SHENZHEN ZTE MICROELECTRONICS TECHNOLOGY CO., LTD. Assignor: ZTE Corporation Contract record no.: 2015440020319 Denomination of invention: Method for configuring signal channel measurement pilot frequency Granted publication date: 20130911 License type: Common License Record date: 20151123 |
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