CN101309221B - Method and apparatus for control forward and backward compatibility of channel under high bandwidth - Google Patents
Method and apparatus for control forward and backward compatibility of channel under high bandwidth Download PDFInfo
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- CN101309221B CN101309221B CN 200810125391 CN200810125391A CN101309221B CN 101309221 B CN101309221 B CN 101309221B CN 200810125391 CN200810125391 CN 200810125391 CN 200810125391 A CN200810125391 A CN 200810125391A CN 101309221 B CN101309221 B CN 101309221B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention discloses a method and a device which control the channel to be forwards and backwards compatible under high bandwidth; wherein, the method includes that the requirement about the frequency range resource of the LTE system in the prior edition is acquired; the frequency range resource which satisfies the requirement is distributed to the LTE system in the prior edition from the high bandwidth; the residual frequency range resource in the high bandwidth is distributed to the LTE system in the current edition. The method and the device control the channel to be forwards and backwards compatible.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of method and apparatus of control forward and backward compatibility of channel under high bandwidth.
Background technology
LTE (Long-Term Evolution, Long Term Evolution)/LTE-Advanced system and IMT-Advanced (International Mobile Telecommunications, international mobile communication) system all is with OFDM (Orthogonal Frequency DivisionMultiplexing; OFDM) technology is the basis, in ofdm system, is the data mode of time-frequency bidimensional; For the power saving of UE (User Equipment, subscriber equipment) end, control channel adopts TDM (Time Division Multiplex usually; Time division multiplexing) mode, that is, control channel and Traffic Channel are separated in time; For example; 14 OFDM symbols are arranged in a sub-frame, and preceding 3 OFDM symbols are as control channel, and back 11 OFDM symbols are as Traffic Channel.
In existing system, the user who often allow to insert is more, and at first the control channel with present LTE system is that example describes.In the LTE system, descending control signaling mainly comprises following content:
1) CCFI (Control Channel Format Indicator, the indication of control channel form);
2) DL Grant (Down Link Grant, descending scheduling mandate);
3) UL Grant (Up Link Grant, uplink scheduling authorization);
4) HI:HARQ indication (Hybrid Automatic Repeat Request Indication mixes automatic repeat requests indication);
Can find out that the design of control channel is to be made up of different parts, each part all has its particular functionality.Describe for ease, below several terms of definition and agreement:
1) indicating several OFDM symbols to be used for control channel is CCFI, independent with CCE (ControlChannels Elements, control channel unit); HI is also independent with CCE;
2) be called CCE in the continuous L number of sub-carrier of frequency domain, CCE can comprise DL Grant and UL Grant;
3) all CCE are the QPSK modulation;
4) each control channel is by a CCE or CCE constitutes;
5) each UE can monitor a series of candidate control channels;
6) number of candidate control channel is the maximum times of blind Detecting;
7) number of candidate's control channel is greater than the number of CCE;
8) transmitting-receiving two-end is stipulated quite a few kinds of combinations, for example has only 1,2,4,8 CCE to combine as the candidate control channel;
9) the corresponding different coding speed of 1,2,4,8 combination difference;
Fig. 1 is the sketch map according to the transmitter architecture of correlation technique, and is as shown in Figure 1, holds at Node-B (enode); Carry out chnnel coding to each UE (UE1 to UEn) control signaling respectively, carry out the QPSK modulation then, carry out CCE to RE (ResourseElement; Subcarrier) forms E-CCFI, carry out subcarrier mapping, space diversity then, carry out IFFT (Inverse Fast Fourier Transform; Inverse-Fourier transform) add CP, parallel/serial DAC, and launch; Suppose that this moment, control channel was made up of 16 CCE, after receiving terminal carries out FFT (Fast Fourier Transform, Fourier transform); UE from be combined as 1 CCE begin to carry out blind Detecting (promptly respectively to CCE1, CCE2 ..., CCE16 carries out blind Detecting); If UE_ID does not monitor success, then from be combined as 2 CCE carry out blind Detecting (promptly respectively to [CCE1 CCE2], [CCE3 CCE4] ..., [CCE15CCE16]), and the like.If in whole blind detection process, all do not listen to the UE_ID that is complementary with oneself, explaining does not have one's own control signaling to assign this moment, and then UE switches to sleep pattern; If listen to the UE_ID that is complementary with oneself, afterwards according to the corresponding business information of control signal demodulation.Because travel through all CCE combined situation, can find out for the blind Detecting number of times of some UE too much.
In LTE/LTE-Advanced and IMT-Advanced system; Support QPSK, 16QAM, 64QAM modulation system; And much all be identical in the modulation system of a plurality of UE of synchronization, if all launch this information in the control signaling of each UE, so just increased the expense of control signaling.But can be placed on E-CCFI (Enhanced-Control Channel Format Indicator to what have an identical modulation system; Strengthen the indication of control channel form) lining; Content in the E-CCFI comprises the maximum sequence number of the professional modulation system and the CCE of correspondence; Transmitting terminal only is mapped in the UE that each has the identical services modulation system in the corresponding CCE serial number range deserved CCE, can reduce the blind Detecting time like this; And be placed on front or middle or back to the CCE of the identical more UE of modulation system this moment, can further reduce the blind Detecting time of most of UE like this.E-CCFI promptly reduces the control signaling consumption, and can reduce number of times, reduction UE end handling process and the power loss of UE end blind Detecting to a certain extent.
Fig. 2 is that as shown in Figure 2, the control information form of expanding among the E-CCFI is made up of two parts according to the sketch map of the E-CCFI composition of correlation technique, professional maximum sequence number of CCE and the indication of professional modulation system of adopting different modulation modes respectively, wherein,
CCFI: the number that is used to indicate the shared OFDM symbol of control channel;
N1: the maximum sequence number of CCE under following/up M1 modulation system;
M1: the modulation system of following/Traffic Channel that up frequency of utilization is the highest;
N2: the maximum sequence number of CCE under following/up M2 modulation system;
M2: down/modulation system of the Traffic Channel that up frequency of utilization is time high;
N3: the maximum sequence number of CCE under following/up the 3rd kind of modulation system;
N4: on/descending m1 modulation system under the maximum sequence number of CCE;
M1: on/modulation system of the Traffic Channel that descending frequency of utilization is the highest;
N5: on/descending m2 modulation system under the maximum sequence number of CCE;
M2: on/modulation system of the Traffic Channel that descending frequency of utilization is time high;
N6: on/descending the 3rd kind of modulation system under the maximum sequence number of CCE.
In realizing process of the present invention, the inventor finds to exist at least in the prior art following problem: at present, the signaling consumption of research control to(for) content, the method for salary distribution, the minimizing of control signaling is a focus; But; Before not considering control channel/back to compatibling problem, that is, and the compatibling problem of LTE system and LTE-Advanced system under the big bandwidth; For example; Original system bandwidth maximum is supported 20MHz, and the existing system bandwidth requirement reaches 40MHz or wideer bandwidth, does not wherein carry out discussing and research about the forward and backward compatibility problem of control channel.
Summary of the invention
The present invention aims to provide a kind of method and apparatus of control forward and backward compatibility of channel under high bandwidth, does not consider the compatibling problem of LTE system and LTE-Advanced system control channel under the big bandwidth to solve prior art.
A kind of method of control forward and backward compatibility of channel under high bandwidth is provided according to an aspect of the present invention.
Method according to the control forward and backward compatibility of channel under high bandwidth of the embodiment of the invention comprises: the LTE system of version is about the demand of the resource of frequency range before obtaining; From big bandwidth, distribute the resource of frequency range that satisfies the demands to give the LTE system of preceding version; The remaining resource of frequency range in the big bandwidth is distributed to the LTE system of current version.
Preferably, said method also comprises: emission CCFI information in the control channel of the resource of frequency range that the LTE of preceding version system uses; Emission E-CCFI information in the control channel of the resource of frequency range that the LTE of current version system uses.
Preferably, said method also comprises: if the resource of frequency range that the LTE system of version uses before being linked into, then demodulation CCFI information and phase related control information thereof; If be linked into the resource of frequency range that the LTE system of current version uses, then demodulation E-CCFI information and phase related control information thereof.
A kind of device of control forward and backward compatibility of channel under high bandwidth is provided according to a further aspect in the invention.
Device according to the control forward and backward compatibility of channel under high bandwidth of the embodiment of the invention comprises: acquisition module, and the LTE system of version is about the demand of the resource of frequency range before being used to obtain; First distribution module is used for distributing the resource of frequency range that satisfies the demands to give the LTE system of preceding version from big bandwidth; Second distribution module is used for the remaining resource of frequency range of big bandwidth is distributed to the LTE system of current version.
Preferably, said apparatus also comprises: first transmitter module is used for the control channel emission CCFI information in the resource of frequency range of the LTE of preceding version system use; Second transmitter module is used for the control channel emission E-CCFI information in the resource of frequency range of the LTE of current version system use.
Preferably, said apparatus also comprises: first demodulation module, if the resource of frequency range that the LTE system of version uses before being used for being linked into, then demodulation CCFI information and phase related control information thereof; Second demodulation module is if be used for being linked into the resource of frequency range that the LTE system of current version uses, then demodulation E-CCFI information and phase related control information thereof.
Above embodiment adopts the LTE system that distributes the resource of frequency range to give the LTE system current version of preceding version; Overcome prior art and do not considered the compatibling problem of LTE system and LTE-Advanced system control channel under the big bandwidth, and then reached the effect of control forward and backward compatibility of channel under high bandwidth.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the sketch map according to the transmitter architecture of correlation technique;
Fig. 2 is the sketch map according to the E-CCFI composition of correlation technique;
Fig. 3 is the flow chart according to the method for the control forward and backward compatibility of channel under high bandwidth of the embodiment of the invention;
Fig. 4 is the sketch map of dividing according to the 100MHz bandwidth of the embodiment of the invention;
Fig. 5 is the block diagram according to the device of the control forward and backward compatibility of channel under high bandwidth of the embodiment of the invention.
Embodiment
Below with reference to accompanying drawing and combine embodiment, specify the present invention.
Method embodiment
According to embodiments of the invention, a kind of method of control forward and backward compatibility of channel under high bandwidth is provided.Fig. 3 is the flow chart according to the method for the control forward and backward compatibility of channel under high bandwidth of the embodiment of the invention, and is as shown in Figure 3, and this method comprises:
Step S302, the LTE system of version is about the demand of the resource of frequency range before obtaining;
Step S304 distributes the resource of frequency range that satisfies the demands to give the LTE system of preceding version from big bandwidth;
Step S306 distributes to the remaining resource of frequency range in the big bandwidth LTE system of current version.
The LTE system of the LTE system of version and current version can allocation of channel resources may under big bandwidth before this embodiment made.
Preferably, said method also comprises: emission CCFI information in the control channel of the resource of frequency range that the LTE of preceding version system uses; Emission E-CCFI information in the control channel of the resource of frequency range that the LTE of current version system uses.The preferred embodiment is used for transmitting terminal emission information.
Preferably, said method also comprises: if the resource of frequency range that the LTE system of version uses before being linked into, then demodulation CCFI information and phase related control information thereof; If be linked into the resource of frequency range that the LTE system of current version uses, then demodulation E-CCFI information and phase related control information thereof.The preferred embodiment is used for the receiving terminal demodulating information.
Describe the method for control forward and backward compatibility of channel under high bandwidth provided by the invention in detail below in conjunction with instantiation.This method comprises the steps:
The first step: Node-B acquiescence is the center frequency range or certain frequency range initially inserts frequency range as UE; And distribute this moment (promptly to the LTE system; The LTE system of version before above-mentioned) frequency range of using and the frequency range of using for LTE-Advanced system (that is the LTE system of above-mentioned current version);
Fig. 4 is the sketch map of dividing according to the 100MHz bandwidth of the embodiment of the invention; As shown in Figure 4; Under big bandwidth, distribute a part of resource and use for the LTE system, for example, distribute 20MHz resource wherein to use for the LTE system; The UE that is used for the LTE system inserts, and only launches CCFI information in the control channel in this 20MHz; The remaining 80MHz resource of frequency range in the big bandwidth is distributed to the LTE-Advanced system, the control channel emission E-CCFI information in the bandwidth range of the UE that can insert the LTE-Advanced system;
Need to prove; Concrete is that which 20MHz resource allocation can self adaptation adjust for LTE; Can give tacit consent to the center frequency range or certain frequency range initially inserts frequency range as UE; Can know which part allocated bandwidth to the LTE system according to system information after UE inserts, which part allocated bandwidth is given the LTE-Advanced frequency range;
Second step: emission CCFI information in the control channel in the frequency range that the LTE system uses; And emission E-CCFI information in the control channel in the frequency range of LTE-Advanced; Particularly, only launch CCFI information in the control channel in above-mentioned 20MHz, emission E-CCFI information in the control channel of the 80MHz in the bandwidth range of the UE that can insert the LTE-Advanced system;
Transmitting terminal all is to launch CCFI information in which frequency range always, and transmitting terminal is not launched the control information of expanding among the E-CCFI, and the respective sub position is used to launch CCE information; If the control information of expanding among the transmitting terminal emission E-CCFI, the respective sub position is used for launching the control information that E-CCFI expands, and other sub-carrier positions are used to launch CCE information;
The 3rd step: UE carries out the demodulation of control channel according to the working frequency range of this moment, if be operated in LTE frequency range, then demodulation CCFI information and other control informations this moment; If be operated in the LTE-Advanced frequency range this moment, then demodulation E-CCFI information and other control informations;
For receiving terminal, the subcarrier that at first will extract the CCFI relevant position carries out demodulation, because receiving terminal knows own access this moment is for which frequency range, so receiving terminal also just knows oneself whether to need demodulation E-CCFI information.
In sum; Adopt method of the present invention, compared with prior art, make that two kinds of structures of CCFI and E-CCFI are compatible at new-old system; Can accomplish the self adaptation emission of good CCFI and two kinds of structures of E-CCFI, make that system's forward and backward compatibility problem is able to solve.
Device embodiment
According to embodiments of the invention, a kind of device of control forward and backward compatibility of channel under high bandwidth is provided.Fig. 5 is the block diagram according to the device of the control forward and backward compatibility of channel under high bandwidth of the embodiment of the invention, and is as shown in Figure 5, and this device comprises:
The LTE system of the LTE system of version and current version can allocation of channel resources may under big bandwidth before this embodiment made.
Preferably, said apparatus also comprises: first transmitter module is used for the control channel emission CCFI information in the resource of frequency range of the LTE of preceding version system use; Second transmitter module is used for the control channel emission E-CCFI information in the resource of frequency range of the LTE of current version system use.The preferred embodiment is used for transmitting terminal emission information.
Preferably, said apparatus also comprises: first demodulation module, if the resource of frequency range that the LTE system of version uses before being used for being linked into, then demodulation CCFI information and phase related control information thereof; Second demodulation module is if be used for being linked into the resource of frequency range that the LTE system of current version uses, then demodulation E-CCFI information and phase related control information thereof.The preferred embodiment is used for the receiving terminal demodulating information.
Above embodiment adopts the LTE system that distributes the resource of frequency range to give the LTE system current version of preceding version; Overcome prior art and do not considered the compatibling problem of LTE system and LTE-Advanced system control channel under the big bandwidth, and then reached the effect of control forward and backward compatibility of channel under high bandwidth.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize by calculation element.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.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 (6)
1. the method for a control forward and backward compatibility of channel under high bandwidth is characterized in that, comprising:
The long evolving system of version is about the demand of the resource of frequency range before obtaining;
From said big bandwidth, distribute the resource of frequency range that satisfies said demand to give the long evolving system of said preceding version;
The remaining resource of frequency range in the said big bandwidth is distributed to the long evolving system of current version.
2. method according to claim 1 is characterized in that, also comprises:
Emission control channel format indication information in the control channel of the resource of frequency range that the long evolving system of version uses before said;
Emission strengthens control channel form indication information in the control channel of the resource of frequency range that the long evolving system of said current version uses.
3. method according to claim 2 is characterized in that, also comprises:
If be linked into the resource of frequency range that the long evolving system of said preceding version uses, then demodulation said control channel form indication information and phase related control information thereof;
If be linked into the resource of frequency range that the long evolving system of said current version uses, then the said enhancing control channel of demodulation form indication information and phase related control information thereof.
4. the device of a control forward and backward compatibility of channel under high bandwidth is characterized in that, comprising:
Acquisition module, the long evolving system of version is about the demand of the resource of frequency range before being used to obtain;
First distribution module is used for distributing the resource of frequency range that satisfies said demand to give the long evolving system of said preceding version from said big bandwidth;
Second distribution module is used for the remaining resource of frequency range of said big bandwidth is distributed to the long evolving system of current version.
5. device according to claim 4 is characterized in that, also comprises:
First transmitter module is used for the control channel emission control channel format indication information of the resource of frequency range that the long evolving system of version before said uses;
Second transmitter module, the control channel emission of the resource of frequency range that is used for using at the long evolving system of said current version strengthens control channel form indication information.
6. device according to claim 5 is characterized in that, also comprises:
First demodulation module, if be used for being linked into said before the resource of frequency range used of the long evolving system of version, then demodulation said control channel form indication information and phase related control information thereof;
Second demodulation module is if be used for being linked into the resource of frequency range that the long evolving system of said current version uses, the then said enhancing control channel of demodulation form indication information and phase related control information thereof.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810125391 CN101309221B (en) | 2008-06-20 | 2008-06-20 | Method and apparatus for control forward and backward compatibility of channel under high bandwidth |
| PCT/CN2009/072228 WO2009152741A1 (en) | 2008-06-20 | 2009-06-11 | Method and apparatus for forward and backward directions compatibility of control channel under high bandwidth |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200810125391 CN101309221B (en) | 2008-06-20 | 2008-06-20 | Method and apparatus for control forward and backward compatibility of channel under high bandwidth |
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| CN101309221A CN101309221A (en) | 2008-11-19 |
| CN101309221B true CN101309221B (en) | 2012-02-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101309221B (en) * | 2008-06-20 | 2012-02-08 | 中兴通讯股份有限公司 | Method and apparatus for control forward and backward compatibility of channel under high bandwidth |
| CN102714840A (en) * | 2009-03-17 | 2012-10-03 | 华为技术有限公司 | Method, terminal, and access network node for sharing resources |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1809998A (en) * | 2003-06-17 | 2006-07-26 | 皇家飞利浦电子股份有限公司 | Coordinating radio resource usage in unlicensed frequency bands |
| CN1960575A (en) * | 2005-11-04 | 2007-05-09 | 三星电子株式会社 | Method of managing resources in a cognitive radio communication system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101296475B (en) * | 2007-04-29 | 2012-10-17 | 华为技术有限公司 | Resource allocation method of communication system and wireless network system |
| CN101309221B (en) * | 2008-06-20 | 2012-02-08 | 中兴通讯股份有限公司 | Method and apparatus for control forward and backward compatibility of channel under high bandwidth |
| CN101296008B (en) * | 2008-06-23 | 2013-08-07 | 中兴通讯股份有限公司 | Self-adapting emission method and apparatus for control channel |
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- 2008-06-20 CN CN 200810125391 patent/CN101309221B/en not_active Expired - Fee Related
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1809998A (en) * | 2003-06-17 | 2006-07-26 | 皇家飞利浦电子股份有限公司 | Coordinating radio resource usage in unlicensed frequency bands |
| CN1960575A (en) * | 2005-11-04 | 2007-05-09 | 三星电子株式会社 | Method of managing resources in a cognitive radio communication system |
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| Publication number | Publication date |
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| WO2009152741A1 (en) | 2009-12-23 |
| CN101309221A (en) | 2008-11-19 |
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Application publication date: 20081119 Assignee: SHENZHEN ZTE MICROELECTRONICS TECHNOLOGY CO., LTD. Assignor: ZTE Corporation Contract record no.: 2015440020319 Denomination of invention: Method and apparatus for control forward and backward compatibility of channel under high bandwidth Granted publication date: 20120208 License type: Common License Record date: 20151123 |
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