CN102752791A - Method and system for determining channel quality indicator - Google Patents
Method and system for determining channel quality indicator Download PDFInfo
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- CN102752791A CN102752791A CN2011101010952A CN201110101095A CN102752791A CN 102752791 A CN102752791 A CN 102752791A CN 2011101010952 A CN2011101010952 A CN 2011101010952A CN 201110101095 A CN201110101095 A CN 201110101095A CN 102752791 A CN102752791 A CN 102752791A
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- pilot signal
- transmitting terminal
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- band
- receiving terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention discloses a method and a system for determining a channel quality indicator (CQI). The method comprises the following steps that a transmitting terminal transmits a pilot signal to a receiving terminal; and after carrying on channel measurement of a sub-band which bears the pilot signal, the receiving terminal feeds back the acquired CQI of the sub-band to the transmitting terminal. The system comprises the transmitting terminal which is used for transmitting the pilot signal to the receiving terminal, and the receiving terminal which is used for feeding back the acquired CQI of the sub-band to the transmitting terminal after carrying on channel measurement of the sub-band which bears the pilot signal. By adopting the method and system disclosed by the invention, the transmitting terminal can be enabled to acquire the CQI on different sub-bands, and a basis for subsequent selection of proper modulation and coding modes on different sub-bands is supplied, so that gains of adaptive coding and modulation are acquired.
Description
Technical field
The present invention relates to moving communicating field, relate in particular to a kind of method and system of definite channel quality indication.
Background technology
In GSM, become during owing to wireless fading channel, make communication process have a large amount of uncertainties.In order to improve throughput of system; Usually adopt the higher high order modulation of transmission rate and few redundant correcting sign indicating number to communicate; Throughput of system is greatly improved when the wireless fading channel signal to noise ratio is more satisfactory like this, but can't ensure then that when channel is in deep fade reliable communications stably carries out; And in order to ensure the reliability of communication; Usually adopt lower low-order-modulated of transmission rate and big redundant correcting sign indicating number to communicate; Promptly, wireless channel ensures stable the carrying out of reliable communications when being in deep fade, but when the channel signal to noise ratio is higher, because transmission rate is lower; Restrict the raising of throughput of system, thereby caused the waste of resource.
Commitment in the mobile communication technology development; Time-varying characteristics for the antagonism wireless fading channel; Can only adopt the transmitting power that strengthens transmitter and use the modulation coding method of the big redundancy of low order to come the communication quality of safeguards system when the channel deep fade, also have no time to think it over and how to improve the throughput of system.Continuous progress along with technical merit; Thereby occurred and can obtain the technology of optimal communication effect with the time-varying characteristics that overcome channel according to the frame length that channel status is regulated transmitting power, modulation coding mode and the data of transmitter adaptively, this technology is called as adaptive technique.
In today of mobile broadband high speed development, the hotspot transmission technology has received widely and having paid close attention to.Be different from common 3G (Third Generation) Moblie technology, the hotspot transmission has bigger transmission bandwidth and the data throughout of Geng Gao usually.With IEEE (Institute of Electrical and Electronics Engineers; IEEE-USA) the 802.11ac technology is an example; Its maximum transmission bandwidth can reach 160,000,000; Hardware circuit solution can surpass 3G bps (bps), and the RFDC scheme of multiple indoor and hot zones can be provided.
Though indoor environment is more stable usually, because transport tape is roomy, the frequency selectivity effect of channel is still inevitable, and in technology such as IEEE 802.11ac, does not consider this point.For example, each user's data is all transmitted on full bandwidth in middle IEEE 802.11ac, and reporting of channel quality also all is to be directed against the entire belt wide region.
Summary of the invention
The object of the present invention is to provide a kind of method and system of definite channel quality indication, carry out the defective that channel quality reports to overcome the existing entire belt wide region that can only be directed against.
For addressing the above problem, the invention provides a kind of method of definite channel quality indication, comprising:
Transmitting terminal is to the receiving terminal pilot signal transmitted;
After receiving terminal carries out channel measurement to the sub-band that carries pilot signal, the indication of the channel quality of the said sub-band that obtains is fed back to said transmitting terminal.
Further,
Transmitting terminal specifically comprises to the receiving terminal pilot signal transmitted:
Said transmitting terminal is pilot signal transmitted in each sub-band.
Further,
Transmitting terminal specifically comprises to the receiving terminal pilot signal transmitted:
Said transmitting terminal is pilot signal transmitted on the parton frequency band only.
Further,
The subcarrier that each sub-band comprised is pre-configured in said transmitting terminal and/or receiving terminal.
Correspondingly, the present invention also provides a kind of system of definite channel quality indication, comprising:
Transmitting terminal is used for to the receiving terminal pilot signal transmitted;
Receiving terminal after being used for the sub-band that carries pilot signal carried out channel measurement, feeds back to said transmitting terminal with the channel quality indication of the said sub-band that obtains.
Further,
Said transmitting terminal is used for specifically comprising to said receiving terminal pilot signal transmitted:
Said transmitting terminal is used for pilot signal transmitted in each sub-band.
Further,
Said transmitting terminal specifically comprises to said receiving terminal pilot signal transmitted:
Said transmitting terminal is used for only pilot signal transmitted on the parton frequency band.
Further,
The subcarrier that each sub-band comprised is pre-configured in said transmitting terminal and/or receiving terminal.
After adopting the present invention, can guarantee that transmitting terminal knows the CQI on the different sub frequency band, for the follow-up suitable modulating coded system of on the different sub frequency band, selecting provides the foundation, to obtain the gain of adaptive coding and modulating.
Description of drawings
Fig. 1 is a method flow diagram of confirming the channel quality indication in the embodiment of the invention;
Fig. 2 is a transmitting terminal pilot signal transmitted in the applying examples of the present invention, and receiving terminal is to the system schematic of transmitting terminal feedback CQI.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, hereinafter will combine accompanying drawing that embodiments of the invention are elaborated.Need to prove that under the situation of not conflicting, embodiment among the application and the characteristic among the embodiment be combination in any each other.
Channel quality indication (Channel Quality Indicator abbreviates CQI as) is the measurement standard of the communication quality of wireless channel.The CQI of a high value representes that quality of channel is better, and vice versa.CQI to a channel can reflect through following performance index: signal to noise ratio (snr), Signal to Interference plus Noise Ratio (SINR), signal and noise distortion are than (SNDR).These values all are after a given channel is measured, to calculate.
In the present embodiment, a kind of method of definite channel quality indication, as shown in Figure 1, may further comprise the steps:
A, transmitting terminal are to the receiving terminal pilot signal transmitted;
Wherein, transmitting terminal can be a pilot signal transmitted in each sub-band, also pilot signal transmitted on the parton frequency band only;
After b, receiving terminal carry out channel measurement to the sub-band that carries pilot signal, the CQI of this sub-band that obtains is fed back to transmitting terminal.
In another embodiment of the present invention, the subcarrier that each sub-band comprised is pre-configured in above-mentioned transmitting terminal and/or receiving terminal.
In another embodiment, a kind of system of definite channel quality indication comprises:
Transmitting terminal is used for to the receiving terminal pilot signal transmitted;
Receiving terminal after being used for the sub-band that carries pilot signal carried out channel measurement, feeds back to said transmitting terminal with the channel quality indication of the said sub-band that obtains.
Preferably,
Said transmitting terminal is used for specifically comprising to said receiving terminal pilot signal transmitted:
Said transmitting terminal is used for pilot signal transmitted in each sub-band.
Preferably,
Said transmitting terminal specifically comprises to said receiving terminal pilot signal transmitted:
Said transmitting terminal is used for only pilot signal transmitted on the parton frequency band.
Preferably,
The subcarrier that each sub-band comprised is pre-configured in said transmitting terminal and/or receiving terminal.
Further specify with an applying examples of the present invention below.
As shown in Figure 2, transmitting terminal is to the receiving terminal pilot signal transmitted.In transmission bandwidth, there are four sub-frequency bands, wherein sub-band 1 corresponding subcarrier 0～f
1, sub-band 2 corresponding subcarrier f
1～f
2, sub-band 3 corresponding subcarrier f
2～f
3, sub-band 4 corresponding subcarrier f
3～f
4, wherein 0, f
1, f
2, f
3And f
4Represent the sub-carrier indices value respectively.Receiving terminal carries out signal measurement to this 4 sub-frequency bands respectively after receiving pilot signal, each self-corresponding CQI value of this 4 sub-frequency bands that will obtain after will measuring then feeds back to transmitting terminal.Wherein, this 4 sub-frequency bands corresponding channel quality indication (CQI) value is respectively: CQI
1, CQI
2, CQI
3And CQI
4
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to accomplish through program, said program can be stored in the computer-readable recording medium, like read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
The above is merely the preferred embodiments of the present invention, is not to be used to limit protection scope of the present invention.According to summary of the invention of the present invention; Also other various embodiments can be arranged; Under the situation that does not deviate from spirit of the present invention and essence thereof, those of ordinary skill in the art are when making various corresponding changes and distortion according to the present invention, and are all within spirit of the present invention and principle; Any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the method for a definite channel quality indication comprises:
Transmitting terminal is to the receiving terminal pilot signal transmitted;
After receiving terminal carries out channel measurement to the sub-band that carries pilot signal, the indication of the channel quality of the said sub-band that obtains is fed back to said transmitting terminal.
2. the method for claim 1 is characterized in that:
Transmitting terminal specifically comprises to the receiving terminal pilot signal transmitted:
Said transmitting terminal is pilot signal transmitted in each sub-band.
3. the method for claim 1 is characterized in that:
Transmitting terminal specifically comprises to the receiving terminal pilot signal transmitted:
Said transmitting terminal is pilot signal transmitted on the parton frequency band only.
4. like any described method in the claim 1～3, it is characterized in that:
The subcarrier that each sub-band comprised is pre-configured in said transmitting terminal and/or receiving terminal.
5. the system of a definite channel quality indication comprises:
Transmitting terminal is used for to the receiving terminal pilot signal transmitted;
Receiving terminal after being used for the sub-band that carries pilot signal carried out channel measurement, feeds back to said transmitting terminal with the channel quality indication of the said sub-band that obtains.
6. system as claimed in claim 5 is characterized in that:
Said transmitting terminal is used for specifically comprising to said receiving terminal pilot signal transmitted:
Said transmitting terminal is used for pilot signal transmitted in each sub-band.
7. system as claimed in claim 5 is characterized in that:
Said transmitting terminal specifically comprises to said receiving terminal pilot signal transmitted:
Said transmitting terminal is used for only pilot signal transmitted on the parton frequency band.
8. like any described system in the claim 5～7, it is characterized in that:
The subcarrier that each sub-band comprised is pre-configured in said transmitting terminal and/or receiving terminal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101010952A CN102752791A (en) | 2011-04-21 | 2011-04-21 | Method and system for determining channel quality indicator |
| PCT/CN2012/072191 WO2012142885A1 (en) | 2011-04-21 | 2012-03-12 | Method and system for determining channel quality indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101010952A CN102752791A (en) | 2011-04-21 | 2011-04-21 | Method and system for determining channel quality indicator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102752791A true CN102752791A (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101010952A Pending CN102752791A (en) | 2011-04-21 | 2011-04-21 | Method and system for determining channel quality indicator |
Country Status (2)
| Country | Link |
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| CN (1) | CN102752791A (en) |
| WO (1) | WO2012142885A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022218090A1 (en) * | 2021-04-13 | 2022-10-20 | 中兴通讯股份有限公司 | Adaptive modulation and coding method, base station, and storage medium |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110336652A (en) * | 2019-07-05 | 2019-10-15 | 北京神经元网络技术有限公司 | Multi-subband coded/modulated method, terminal, electronic equipment and the system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060279435A1 (en) * | 2002-10-29 | 2006-12-14 | Ranganathan Krishnan | Uplink pilot and signaling transmission in wireless communication systems |
| CN1941689A (en) * | 2005-09-29 | 2007-04-04 | 上海原动力通信科技有限公司 | Method for dispatching sub-frequency band of time-division duplex OFDM system |
| CN101047944A (en) * | 2006-03-28 | 2007-10-03 | 富士通株式会社 | Sub-band notification method and terminal apparatus |
| CN101253709A (en) * | 2005-08-29 | 2008-08-27 | 三星电子株式会社 | Apparatus and method of feedback channel quality information and scheduling apparatus and method using thereof in a wireless communication system |
-
2011
- 2011-04-21 CN CN2011101010952A patent/CN102752791A/en active Pending
-
2012
- 2012-03-12 WO PCT/CN2012/072191 patent/WO2012142885A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060279435A1 (en) * | 2002-10-29 | 2006-12-14 | Ranganathan Krishnan | Uplink pilot and signaling transmission in wireless communication systems |
| CN101253709A (en) * | 2005-08-29 | 2008-08-27 | 三星电子株式会社 | Apparatus and method of feedback channel quality information and scheduling apparatus and method using thereof in a wireless communication system |
| CN1941689A (en) * | 2005-09-29 | 2007-04-04 | 上海原动力通信科技有限公司 | Method for dispatching sub-frequency band of time-division duplex OFDM system |
| CN101047944A (en) * | 2006-03-28 | 2007-10-03 | 富士通株式会社 | Sub-band notification method and terminal apparatus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022218090A1 (en) * | 2021-04-13 | 2022-10-20 | 中兴通讯股份有限公司 | Adaptive modulation and coding method, base station, and storage medium |
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| WO2012142885A1 (en) | 2012-10-26 |
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Application publication date: 20121024 |