CN101296033B - Method and device for control channel resource mapping - Google Patents
Method and device for control channel resource mapping Download PDFInfo
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- CN101296033B CN101296033B CN 200810100486 CN200810100486A CN101296033B CN 101296033 B CN101296033 B CN 101296033B CN 200810100486 CN200810100486 CN 200810100486 CN 200810100486 A CN200810100486 A CN 200810100486A CN 101296033 B CN101296033 B CN 101296033B
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Abstract
The invention discloses a method and a device for controlling mapping of channel resources, wherein, the method comprises the following steps of: acquiring CCFI information; mapping control information extended in E-CCFI into OFDM symbols occupied by a control channel directed by the CCFI information. The device comprises an acquiring module used for acquiring the CCFI information and a first mapping module used for mapping the control information extended in the E-CCFI into the OFDM symbols occupied by the control channel directed by the CCFI information. The invention leads the mapping of the control information resources extended in the E-CCFI to achieve best frequency diversity.
Description
Technical field
The present invention relates to the communications field, in particular to a kind of method and apparatus of control channel resource mapping.
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, it is the data mode of time-frequency bidimensional, for UE (User Equipment, subscriber equipment) end power saving, 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 subframe, and front 3 OFDM symbols are as control channel, and rear 11 OFDM symbols are as Traffic Channel.
In existing system, often allow the user of access more, at first describe as an example of the control channel of present LTE system example.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, mixed automatic retransfer request indication);
Can find out that the design of control channel is to be made of different parts, each part has its specific function.For convenience of description, the below's several terms of definition and agreement:
1) CCFI namely indicates several OFDM symbols to be used for control channel, and is independent with CCE (ControlChannels Elements, control channel unit); HI is also independent with CCE;
2) be called CCE at the continuous L of a frequency domain subcarrier, 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 control channel is greater than the number of CCE;
8) transmitting-receiving two-end has been stipulated several combinations, for example only has 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 schematic diagram according to the transmitter architecture of correlation technique, as shown in Figure 1, hold at Node-B (enode), each UE (UE1 to UEn) control signal is carried out respectively chnnel coding, then carry out the QPSK modulation, carry out CCE to RE (ResourseElement, subcarrier) forms E-CCFI, then carry out the subcarrier mapping, space diversity, carry out IFFT (Inverse Fast Fourier Transform, inverse-Fourier transform) adds CP, parallel/serial DAC, and launch, suppose that this moment, control channel was made of 16 CCE, receiving terminal carries out FFT (Fast Fourier Transform, Fourier transform) after, UE begins to carry out blind Detecting (namely respectively to CCE1 from being combined as 1 CCE, CCE2, ..., CCE16 carries out blind Detecting), if UE_ID does not monitor successfully, then carry out blind Detecting (namely respectively to [CCE1CCE2] from being combined as 2 CCE, [CCE3CCE4], ..., [CCE15CCE16]), the like.If all do not listen to the UE_ID that is complementary with oneself in whole blind detection process, illustrating does not have one's own control signal 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 launch this information in the control signal of each UE, so just increased the expense of control signal.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) inner, content in the E-CCFI comprises the maximum sequence number of the CCE of professional modulation system and 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 the CCE of the identical more UE of modulation system this moment is placed on front or centre or back, can further reduces so the blind Detecting time of most of UE.E-CCFI namely reduces the control signal expense, and can reduce to a certain extent number of times, reduction UE end handling process and the power loss of UE end blind Detecting.
Fig. 2 is that as shown in Figure 2, the control information form of expanding among the E-CCFI is made of two parts according to the schematic diagram of the E-CCFI composition of correlation technique, the professional maximum sequence number of CCE and the indication of professional modulation system of adopting respectively different modulation systems, wherein,
CCFI: the number that is used to indicate the shared OFDM symbol of control channel;
N1: the maximum sequence number of CCE under the lower/upper row M1 modulation system;
M1: lower/upper enforcement is with the modulation system of the highest Traffic Channel of frequency;
N2: the maximum sequence number of CCE under the lower/upper row M2 modulation system;
M2: lower/upper enforcement is with the modulation system of time high Traffic Channel of frequency;
N3: the maximum sequence number of CCE under the 3rd kind of modulation system of lower/upper row;
N4: the maximum sequence number of CCE under the up/down row m1 modulation system;
M1: up/down is exercised the modulation system with the highest Traffic Channel of frequency;
N5: the maximum sequence number of CCE under the up/down row m2 modulation system;
M2: up/down is exercised the modulation system with time high Traffic Channel of frequency;
N6: the maximum sequence number of CCE under the 3rd kind of modulation system of up/down row.
In realizing process of the present invention, the inventor finds that there are the following problems at least in the prior art: at present, content for control signal, the method of salary distribution, the research that reduces the control signal expense is a focus, but, do not consider effective control channel resource mapping, prior art has its limitation, for example, CCFI is used to indicate several OFDM symbols (＜=3 OFDM symbols) and is used for control information, so the resource mapping for CCFI can be placed in the 1st the OFDM symbol, resource mapping can't obtain to reach the frequency diversity of optimum, and, do not carry out discussing and research for the control information resource mapping of expanding among the E-CCFI.
Summary of the invention
The present invention aims to provide a kind of method and apparatus of control channel resource mapping, does not consider the problem of the control information resource mapping of expanding among the E-CCFI to solve prior art.
A kind of method of control channel resource mapping is provided according to an aspect of the present invention.
Method according to the control channel resource mapping of the embodiment of the invention comprises: obtain CCFI information; The control information of expanding among the E-CCFI is mapped in the OFDM symbol that the indicated control channel of CCFI information takies.
Preferably, said method also comprises: CCFI information is mapped in first OFDM symbol.
Preferably, said method also comprises: demodulation CCFI information in first OFDM symbol;
Preferably, in first OFDM symbol, also comprise after the demodulation CCFI information: determine the OFDM symbol that control channel is shared according to CCFI information; From the OFDM symbol, extract the control information of expanding among the E-CCFI; The control information of expanding among the demodulation E-CCFI.
A kind of device of control channel resource mapping is provided according to a further aspect in the invention.
Device according to the control channel resource mapping of the embodiment of the invention comprises: acquisition module is used for obtaining CCFI information; The first mapping block is used for the control information that E-CCFI expands is mapped in the OFDM symbol that the indicated control channel of CCFI information takies.
Preferably, said apparatus also comprises: the second mapping block is used for CCFI information is mapped in first OFDM symbol.
Preferably, said apparatus also comprises: the first demodulation module is used for demodulation CCFI information in first OFDM symbol;
Preferably, said apparatus also comprises: determination module is used for determining the OFDM symbol that control channel is shared according to CCFI information; Extraction module is used for extracting the control information of expanding the E-CCFI from the OFDM symbol; The second demodulation module is used for the control information that demodulation E-CCFI expands.
Above embodiment adopts the control information of expanding among the E-CCFI is mapped to the interior method of the shared whole OFDM symbols of control channel, overcome prior art and do not considered the problem of the control information resource mapping of expanding among the E-CCFI, and then made the control information resource mapping of expanding among the E-CCFI reach optimum frequency diversity.
Description of drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, consists of the application's a part, and illustrative examples of the present invention and explanation thereof are used for explaining the present invention, do not consist of improper restriction of the present invention.In the accompanying drawings:
Fig. 1 is the schematic diagram according to the transmitter architecture of correlation technique;
Fig. 2 is the schematic diagram according to the E-CCFI composition of correlation technique;
Fig. 3 is the flow chart according to the method for the control channel resource mapping of the embodiment of the invention;
Fig. 4 is the schematic diagram of the control information resource mapping expanded among the E-CCFI according to the embodiment of the invention;
Fig. 5 is the block diagram according to the device of the control channel resource mapping of the embodiment of the invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Embodiment of the method
According to embodiments of the invention, provide a kind of method of control channel resource mapping.
Fig. 3 is that as shown in Figure 3, the method comprises according to the flow chart of the method for the control channel resource mapping of the embodiment of the invention:
Step S302 obtains CCFI information;
Step S304 is mapped to the control information of expanding among the E-CCFI in the OFDM symbol that the indicated control channel of CCFI information takies.
This embodiment is so that the control information resource mapping of expanding among the E-CCFI can reach optimum frequency diversity.
Preferably, said method also comprises: CCFI information is mapped in first OFDM symbol.
Above embodiment is applied to the processing procedure of reflection end, according to said method the control channel resource is shone upon.
Preferably, said method also comprises: demodulation CCFI information in first OFDM symbol;
Preferably, in first OFDM symbol, also comprise after the demodulation CCFI information: determine the OFDM symbol that control channel is shared according to CCFI information; From the OFDM symbol, extract the control information of expanding among the E-CCFI; The control information of expanding among the demodulation E-CCFI.
Above embodiment is applied to receiving terminal, according to said method the information that receives is carried out demodulation.
Describe the method for control channel resource mapping provided by the invention in detail below in conjunction with instantiation.Fig. 4 is the schematic diagram of the control information resource mapping expanded among the E-CCFI according to the embodiment of the invention, and as shown in Figure 4, the method comprises the steps:
The first step: transmitting terminal (Node-B) at first shines upon CCFI information, namely CCFI information only is mapped in the 1st the OFDM symbol, is used to indicate several OFDM symbols (＜=3 OFDM symbols) and is used for control information;
Second step: the control information mapping of expanding among the E-CCFI, for the mapping of the control information of expanding among the E-CCFI can according to this moment CCFI occurrence carry out the mapping of time-frequency bidimensional, be that its mapping should consider that frequency domain considers time domain again, the control information of expanding among the E-CCFI is mapped in the shared whole OFDM symbols of control channel;
Particularly, Node-B according to this moment CCFI occurrence decide the control information of expanding among the E-CCFI whether to carry out time-frequency bidimensional mapping; If this moment, the CCFI value was 1, that is, the control information of expanding among the E-CCFI only is mapped in the 1st the OFDM symbol; If this moment, the CCFI value was 2, that is, the control information of expanding among the E-CCFI is mapped in front 2 OFDM symbols; If this moment, the CCFI value was 3, namely the control information of expanding among the E-CCFI is mapped in front 3 OFDM symbols;
The 3rd step: receiving terminal UE at first wants demodulation CCFI information, after in the 1st OFDM symbol, demodulating CCFI information, the control channel of then having known this moment has taken altogether several OFDM symbols, carries out demodulation as long as from the relevant position control information of expanding the E-CCFI extracted.
Particularly, UE according to this moment CCFI occurrence decide the extraction of the control information of expanding among the E-CCFI; If this moment, the CCFI value was 1, namely only in the 1st OFDM symbol, extract the control information of expanding among the E-CCFI; If this moment, the CCFI value was 2, namely in front 2 OFDM symbols, extract the control information of expanding among the E-CCFI; If this moment, the CCFI value was 3, namely in front 3 OFDM symbols, extract the control information of expanding among the E-CCFI;
The 4th step: demodulation is carried out in the control information of expanding among the E-CCFI that extracts.
In sum, adopt method of the present invention, compared with prior art, should take different resource mapping method for different control informations, by reasonable adjustment, utilize various parameters and resource, make the resource mapping of control information more reasonable, that is, the control information resource mapping of expanding among the E-CCFI can reach optimum frequency diversity.
Device embodiment
According to embodiments of the invention, provide a kind of device of control channel resource mapping.
Fig. 5 is the block diagram according to the device of the control channel resource mapping of the embodiment of the invention, and as shown in Figure 5, this device comprises:
Acquisition module 52 is used for obtaining CCFI information;
The first mapping block 54 is used for the control information that E-CCFI expands is mapped in the OFDM symbol that the indicated control channel of CCFI information takies.
Preferably, said apparatus also comprises: the second mapping block is used for CCFI information is mapped in first OFDM symbol.
Above embodiment is applied to the processing unit of reflection end, according to said apparatus the control channel resource is shone upon.
Preferably, said apparatus also comprises: the first demodulation module is used for demodulation CCFI information in first OFDM symbol;
Preferably, said apparatus also comprises: determination module is used for determining the OFDM symbol that control channel is shared according to CCFI information; Extraction module is used for extracting the control information of expanding the E-CCFI from the OFDM symbol; The second demodulation module is used for the control information that demodulation E-CCFI expands.
Above embodiment is applied to receiving terminal, according to said apparatus the information that receives is carried out demodulation.
Above embodiment adopts the control information of expanding among the E-CCFI is mapped to the interior method of the shared whole OFDM symbols of control channel, overcome prior art and do not considered the problem of the control information resource mapping of expanding among the E-CCFI, and then made the control information resource mapping of expanding among the E-CCFI reach optimum frequency diversity.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and be carried out by calculation element, perhaps they are made into respectively each integrated circuit modules, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, 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 channel resource mapping is characterized in that, comprising:
Obtain control channel form indication information;
The control information that strengthens expansion in the indication of control channel form is mapped in the OFDM symbol that the indicated control channel of described control channel form indication information takies;
Described method also comprises: described control channel form indication information is mapped in first OFDM symbol.
2. method according to claim 1 is characterized in that, also comprises:
The described control channel form of demodulation indication information in described first OFDM symbol.
3. method according to claim 2 is characterized in that, also comprises after the described control channel form of the demodulation indication information in described first OFDM symbol:
Determine the described OFDM symbol that control channel is shared according to described control channel form indication information;
From described OFDM symbol, extract the control information of expansion in the described enhancing control channel form indication;
The control information of expansion in the indication of the described enhancing control channel of demodulation form.
4. the device of a control channel resource mapping is characterized in that, comprising:
Acquisition module is used for obtaining control channel form indication information;
The first mapping block is used for strengthening control information that the indication of control channel form expands and is mapped in the OFDM symbol that the indicated control channel of described control channel form indication information takies;
Described device also comprises: the second mapping block is used for described control channel form indication information is mapped in first OFDM symbol.
5. device according to claim 4 is characterized in that, also comprises:
The first demodulation module is used for the described control channel form of demodulation indication information in described first OFDM symbol.
6. device according to claim 5 is characterized in that, also comprises:
Determination module is used for determining the described OFDM symbol that control channel is shared according to described control channel form indication information;
Extraction module is used for extracting from described OFDM symbol the control information of expansion the described enhancing control channel form indication;
The second demodulation module is used for the control information of the described enhancing control channel of demodulation form indication expansion.
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| CN 200810100486 CN101296033B (en) | 2008-06-23 | 2008-06-23 | Method and device for control channel resource mapping |
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| CN 200810100486 CN101296033B (en) | 2008-06-23 | 2008-06-23 | Method and device for control channel resource mapping |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1774122A (en) * | 2004-11-12 | 2006-05-17 | 华为技术有限公司 | Method for up-enhancing control channel signalling coding |
| CN101162986A (en) * | 2007-11-09 | 2008-04-16 | 中兴通讯股份有限公司 | Signal transmitting method on downlink special time slot of TDD system |
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2008
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1774122A (en) * | 2004-11-12 | 2006-05-17 | 华为技术有限公司 | Method for up-enhancing control channel signalling coding |
| CN101162986A (en) * | 2007-11-09 | 2008-04-16 | 中兴通讯股份有限公司 | Signal transmitting method on downlink special time slot of TDD system |
Non-Patent Citations (2)
| Title |
|---|
| Mitsubishi Electric.On fourth value of CCFI (Cat0).《3GPP TSG RAN WG1 #49bis. Tdoc R1-072722 》.2007, |
| Mitsubishi Electric.On fourth value of CCFI (Cat0).《3GPP TSG RAN WG1 #49bis. Tdoc R1-072722 》.2007, * |
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Application publication date: 20081029 Assignee: SHENZHEN ZTE MICROELECTRONICS TECHNOLOGY CO., LTD. Assignor: ZTE Corporation Contract record no.: 2015440020319 Denomination of invention: Method and device for control channel resource mapping Granted publication date: 20130227 License type: Common License Record date: 20151123 |
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