CN104508991A - Channel detection method, apparatus and terminal - Google Patents

Channel detection method, apparatus and terminal Download PDF

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Publication number
CN104508991A
CN104508991A CN201380002704.6A CN201380002704A CN104508991A CN 104508991 A CN104508991 A CN 104508991A CN 201380002704 A CN201380002704 A CN 201380002704A CN 104508991 A CN104508991 A CN 104508991A
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crs
pcfich
phich
channel
target
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CN104508991B (en
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余政
程型清
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • 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
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • 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
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • 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
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
    • H04B7/0671—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different delays between antennas
    • 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
    • H04L5/0037—Inter-user or inter-terminal allocation

Abstract

A channel detection method, an apparatus and a terminal are provided. The method comprises: determining a target CRS (Common Reference Signal), which is adjacent to a resource element (RE) for the transmission of a physical control format indicator channel (PCFICH) and/or a physical hybrid-ARQ (Automatic Repeat Request) indicator channel (PHICH) and which is located on the RE bearing the common reference signal (CRS); performing channel estimation on the PCFICH and/or the PHICH according to the information of the target CRS, and performing channel detection on the PCFICH and/or the PHICH according to the result of channel estimation. By adopting the technical solution provided in the embodiment of the present invention, narrow-band channel estimation on the PCFICH and/or the PHICH is performed on the basis of finite CRS, which further enables demodulation detection of the PCFICH and/or the PHICH. Furthermore, by adopting the embodiment of the present invention, the feature of low cost in a low-end machine type communication (MTC) terminal can also be kept, and there is no need of developing the MTC terminal.

Description

Channel detection method, apparatus and terminal
A kind of channel detection method, device and terminal
Technical field
The present invention relates to PCFICH channels or PHICH channel detection methods, device and terminal in communication technical field, more particularly to a kind of LTE systems.Background technology
Internet of Things refers to, by various equipment of the deployment with certain perception, calculating, execution and communication capacity, obtains the information of physical world, by real-time performance information transfer, collaboration and processing, so as to realize the network of the interconnection of people and thing, thing and thing.In brief, Internet of Things seeks to realize people and thing, thing and thing（Be M2M) interconnect.Can be with GSM (global system for mobile communications in order to provide cost, Global System of Mobile communication)/GPRS (general packet radio service technologies, General Packet Radio Service) terminal cost compares, even than GSM/GPRS terminals cost also low LTE (Long Term Evolution, Long Term Evolution）Terminal, to replace the GSM/GPRS terminals applied in the Μ of Μ 2 applications, so as to replace GSM/GPRS networks using LTE network in the Μ of Μ 2 applications.
The maximum system bandwidth that LTE system can be supported is 20MHz, and common LTE terminal can carry out data receiver and transmission on whole carrier wave.And for inexpensive MTC (Machine Type Communication, machine type communication）Terminal, as one of technological means of its cost is reduced, reduces the reception bandwidth of data, control and/or reference signal that terminal can be supported so that the disposal ability of the MTC terminals of low cost be merely able to processing smaller strip it is wide in（Such as 1.4MHz, 3MHz or 5MHz's）Data, control and/or reference signal etc., so as to reduce its radio frequency and/or base band cost.For example, for MTC terminals, for the cost consideration of reduction MTC terminal, allowing MTC terminal its downlink data reception on the carrier wave in a broadband to be merely able to processing smaller strip wide interior（It is arrowband）Data, reduce MTC terminal downlink data disposal ability and data storage, it is achieved thereby that the saving of MTC terminal cost.In LTE system, terminal needs to be informed in the initial time of data transfer in present sub-frame before receiving the data, wherein, each subframe is by multiple OFDM (OFDMs, Orthogonal Frequency Division Multiplexing) symbol composition, in first OFDM symbol of subframe, by PCFICH, (physical control format is indicated, Physical Control Format Indicator Channel) channel carry CFI (reference format indicating bits, Control Format Indicator) value indicate in this height The OFDM symbol number that frame in control channel takes, last OFDM sign-on that data transfer then takes from control is mapped.In addition, in LTE system, when terminal is after up PUSCH (Physical Uplink Shared Channel, Physical Uplink Shared Channel) transmission data, base station needs to indicate channel feedback response message to terminal by physical mixed.If base station is successfully received the upstream data of terminal transmission, by PHICH, (physical mixed is indicated for base station, Physical Hybrid Indicator Channel) channel feedback ACK (ACKnowledge) is to terminal, and otherwise base station feedback NACK (Not ACKnowledge) is to terminal.In the prior art, when terminal carries out PCFICH channels or PHICH Channel Detections, predefined well because the running time-frequency resource shared by the PCFICH channels of carrying CFI values and the PHICH channels of loading ACK/NACK response messages is system, so for non-MTC terminal, can be based on (the Common Reference Signal of the CRS on whole carrier wave frequency range, public reference signal) carry out channel estimation, and go the predetermined PCFICH channels of system or the enterprising row data demodulation of PHICH channels to detect according to the result of channel estimation.And for MTC terminal, the consideration reduced based on cost, generally MTC terminals can not support the data processing in broadband.
The content of the invention
The embodiment of the present invention provides a kind of channel detection method, device and terminal, and the MTC terminal to solve arrowband present in prior art can not detect the technical problem of PCFICH channels and PHICH channels.
In a first aspect, the embodiment of the present invention provides a kind of channel detection method, including：It is determined that with indicating that channel PHICH transmission resource element RE used is neighbouring and carries the target CRS on public reference signal CRS RE for Physical Control Format Indicator Channel PCFICH and/or physical mixed;Described neighbouring refers to：Carry the interval RE numbers between the RE and the RE used for PCFICH or PHICH transmission of the CRS and be no more than preset value, and the storages of the mechanical type communication terminal MTC UE based on preset value CRS Slow rushes device size and rushes device size less than the standard UE Slow for storing CRS：
The channel estimation of the PCFICH and/or PHICH channels is carried out according to the target CRS；Result according to the channel estimation carries out PCFICH the and/or PHICH Channel Detections.
It is described according to the target CRS information in the first possible implementation of first aspect PCFICH channel estimations are carried out, including：
Judge whether there is RE to carry CRS in the RE that four used in PCFICH transmissions resource element groups REG are included, if, the CRS carried in the RE that then four REG are included carries out PCFICH channel estimations as target CRS, and according to the target CRS.
In second of possible implementation of first aspect, carried out according to the target CRS information
PHICH channel estimations, including：
Judge whether there is RE to carry CRS in the RE that three used in PHICH transmissions resource element groups REG are included, if, the CRS carried in the RE that then three REG are included carries out PHICH channel estimations as target CRS, and according to the target CRS.
In the third possible implementation of first aspect, the target CRS includes：The CRS on other subcarriers with PCFICH and/or PHICH transmission in the same orthogonal frequency division multiplex OFDM symbols of RE used, and/or, the CRS in the OFDM symbol adjacent with the RE that PCFICH and/or PHICH transmission is used.
In the 4th kind of possible implementation of first aspect, the RE numbers corresponding to time-domain resource position, frequency domain resource position and the target CRS of the target CRS are predetermined.
In the 5th kind of possible implementation of first aspect, the RE numbers corresponding to time-domain resource position, frequency domain resource position and the target CRS of the target CRS are predefined with specific reference to the demand and/or base band signal process ability of PHICH and/or PCFICH Channel Detections.
Second aspect, the embodiment of the present invention also provides a kind of Channel Detection device, including：Determining module, for determining the target CRS on neighbouring and carrying public reference signal CRS the RE with the resource element RE used for PCFICH and/or PHICH transmission;Described neighbouring refers to：Carry the interval RE numbers between the RE and the RE used for PCFICH or PHICH transmission of the CRS and be no more than preset value, and the storages of the mechanical type communication terminal MTC UE based on preset value CRS Slow rushes device size and rushes device size less than the standard UE Slow for storing CRS；
Channel estimation module, for carrying out the PCFICH and/or PHICH according to the target CRS The channel estimation of channel；
Channel detection module, PCFICH and/or PHICH Channel Detections are carried out for the result according to the channel estimation.
In the first possible implementation of second aspect, the channel estimation module includes：First judging submodule, for judging whether there is RE to carry CRS in the RE that four resource element groups REG used in PCFICH transmissions are included;
First estimation submodule, in the case of being in the result of first judging submodule, the CRS carried in the RE included according to four REG carries out PCFICH channel estimations as target CRS, and according to the target CRS.
In second of possible implementation of second aspect, the channel estimation module includes：Second judging submodule, for judging whether there is RE to carry CRS in the RE that three resource element groups REG used in PHICH transmissions are included;
Second estimation submodule, in the case of being in the result of second judging submodule, the CRS carried in the RE that three REG are included carries out PHICH channel estimations as target CRS, and according to the target CRS.
The third aspect, the embodiment of the present invention also provides a kind of MTC terminal, including：Device described in foregoing any one.Fourth aspect, the embodiment of the present invention also provides a kind of MTC terminal, including at least one processor, at least one network interface or other communication interfaces, memory, and at least one communication bus, for realizing the connection communication between these devices；Wherein,
Store for by the programmed instruction of the computing device, wherein, programmed instruction includes determining module, channel estimation module and channel detection module；The determining module, for determining the target CRS on neighbouring and carrying public reference signal CRS the RE with the resource element RE used for PCFICH and/or PHICH transmission;It is described neighbouring to be Refer to：Carry the interval RE numbers between the RE and the RE used for PCFICH or PHICH transmission of the CRS and be no more than preset value, and the storages of the mechanical type communication terminal MTC UE based on preset value CRS Slow rushes device size and rushes device size less than the standard UE Slow for storing CRS：The channel estimation module, the channel estimation for carrying out PCFICH the and/or PHICH channels according to the target CRS；The channel detection module, PCFICH and/or PHICH Channel Detections are carried out for the result according to the channel estimation.Beneficial effect of the present invention includes：In embodiments of the present invention, because terminal only needs to carry out channel estimation based on the CRS and/or REG in REG neighbouring CRS, so Ji Bianshi ends MTC terminal also only needs to store limited CRS values, it is the PCFICH channels and/or PHICH channel estimations that arrowband is carried out based on limited CRS, so as to realize the demodulation detection of PCFICH and/or PHICH channels.Further, using the method for the embodiment of the present invention, moreover it is possible to the inexpensive feature of low side MTC terminal is kept, without being developed to it.Brief description of the drawings
In order to illustrate more clearly of the technical scheme in the embodiment of the present application, the accompanying drawing used required in being described below to embodiment is briefly described, apparently, drawings in the following description are only some embodiments of the present application, for those of ordinary skill in the art, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of channel detection method provided in an embodiment of the present invention；
Fig. 2 is a kind of flow chart of step 102 in channel detection method provided in an embodiment of the present invention；Fig. 3 is another flow chart of step 102 in channel detection method provided in an embodiment of the present invention；Fig. 4 is the structural representation of Channel Detection device provided in an embodiment of the present invention；
Fig. 5 is a kind of structural representation of channel estimation module in Channel Detection device provided in an embodiment of the present invention；
Fig. 6 is another structure of channel estimation module in Channel Detection device provided in an embodiment of the present invention Schematic diagram；
Fig. 7 is a kind of hardware architecture diagram of user equipment provided in an embodiment of the present invention.
Embodiment
The embodiments of the invention provide a kind of channel detection method, device and terminal, the preferred embodiments of the present invention are illustrated below in conjunction with Figure of description, it should be appreciated that preferred embodiment described herein is merely to illustrate and explain the present invention, it is not intended to limit the present invention.And in the case where not conflicting, the feature in embodiment and embodiment in the application can be mutually combined.
In LTE system, the resource that PCFICH and PHICH take is with resource element groups（REG, Resource Element Group) it is unit.Wherein, each PCFICH maps on 4 REG, and each PHICH channels map on 3 or 2 REG, and multiple PHICH channels can carry out code division multiplexing in identical REG resources.Wherein, REG is multiple continuous different RE (resource element, Resource Element) compositions in same OFDM symbol, and whether REG size has CRS relevant with the OFDM symbols.If having CRS in an OFDM symbol, each REG in the OFDM includes 6 RE, and has two RE to be used for CRS mappings in this 6 RE, and 4 RE in addition are used for PCFICH or PHICH channels.If not having CRS in the OFDM symbol, each REG in the OFDM includes 4 RE, and this 4 RE are used for PCFICH or PHICH channels.Therefore, generally, PCFICH channels will be mapped on 16 RE (being four REG), and PHICH channels will be at 12（It is three REG) map on RE.
In addition, in LTE system, PCFICH only maps in first OFDM symbol, and during PHICH can use standard（Normal duration) or evolution during (extended duration) mode mapped.Wherein, " normal duration " represents that PHICH only maps in first OFDM symbol, " extended duration " represents that PHICH is mapped in multiple OFDM symbols, and the OFDM symbol number that agreement takes to PHICH " extended duration " mapping mode has specific regulation.In addition, 3 that 4 REG or PHICH transmissions that PCFICH transmissions take take Frequency interval between REG of the REG in mapping, agreement also has advance regulation, and such base station and terminal both sides can just determine 3 REG of 4 REG or PHICH channels of PCFICH channels frequency location.
Preferably, below in conjunction with the accompanying drawings, method, device and the terminal provided with specific embodiment the present invention is described in detail.
The embodiment of the present invention provides a kind of channel detection method embodiment, as shown in figure 1, for the flow chart of the channel detection method provided in the embodiment of the present invention 1, the present embodiment can specifically include：
Step S101, the resource element RE for determining and being used for PCFICH and/or PHICH transmission are neighbouring and carry the target CRS on public reference signal CRS RE.
The embodiment of the present invention can apply to MTC terminal.Because MTC terminal can predefine out the RE resources for PCFICH and PHICH transmission, so for low side MTC terminal, when it detects PCFICH channels, it only needs to the data on corresponding 16 RE of PCFICH channels to extract, and according to this 16 RE are neighbouring and RE of carrying public reference signal CRS on target CRS carry out channel estimation, decoding can be demodulated to the data on this 16 RE, so as to solve CFI value, PCFICH Channel Detections are realized.Similar, for the detection of PHICH channels, low side MTC terminals only need to the data on corresponding 12 RE of PHICH channels to extract, and according to this 12 RE it is neighbouring and carrying CRS RE on target CRS carry out channel estimation, so as to be demodulated decoding to the data on this 12 RE, so as to know the response message of PHICH carryings, PHICH Channel Detections are realized.Therefore, first, terminal it needs to be determined that with shared for PCFICH and/or PHICH transmission RE is neighbouring and RE of carrying CRS on target CRS.
In embodiments of the present invention, " neighbouring " refer to that the RE for carrying the CRS and the interval RE numbers transmitted for PCFICH or PHICH between RE used are no more than preset value, and based on the mechanical type communication terminal of the preset value（MTC UE) storage CRS Slow rush device size（Buffer size) it is less than standard（Normal) UE storages CRS Slow rushes device size.Specifically, target CRS can be on other subcarriers in the same OFDM symbols of RE used with PCFICH and/or PHICH transmission CRS, can also be the CRS in the OFDM symbol adjacent with the RE that PCFICH and/or PHICH transmission is used.But because the demand of Channel Detection is different, the factor such as precision, algorithm complex or cost is not known, so the embodiment of the present invention does not provide the number of specifically " target CRS " yet, the RE numbers corresponding to the target CRS time-domain resource position, frequency domain resource position and target CRS are can be with predetermined.Specifically, pre-defining CRS antenna point in base station（Antenna port) number in the case of, the number of the target CRS on each antenna port can be by demand of the those skilled in the art according to Channel Detection（Such as precision, algorithm complex or cost etc.）And/or base band signal process ability is predefined.
Step S102, the channel estimation according to target CRS progress PCFICH and/or PHICH channels.
Terminal is it is determined that after target CRS, it is possible to the channel estimation of PCFICH and/or PHICH channels is carried out according to target CRS.
Wherein, for PCFICH channel estimations, with reference to shown in Fig. 2, it is the flow chart that PCFICH channel estimations are carried out according to target CRS, can specifically includes：
Step 201:Judge what four used in PCFICH transmissions resource element groups REG were included
Whether there is RE to carry CRS in RE, if it is, into step 202;If it is not, then into step 203;
An ancient weapon made of bamboo sets base station side and is configured with N number of CRS points（Port) (portO, port (N-l)), N is positive integer, and representative value is 1,2 or 4;Then this step needs to judge whether have RE to carry CRS in the RE that four resource element groups REG used in PCFICH transmissions are included;
Step 202:The CRS carried on the RE that four REG are included carries out PCFICH channel estimations as target CRS, and according to the target CRS；
If in the REG j (j=0, K-l) of PCFICH channel occupancies comprising port i (i=0,
N-l CRS), wherein, K=4;Shellfish ' J REGj port i (i=0, N-l) on the neighbouring port i of CRS and/or REGj of the channel estimation then based on the port i in REGj CRS carry out； Step 203：PCFICH channel estimations are carried out according to the target CRS.
Otherwise, the channel estimation on REG j port i is then based only on the neighbouring port i of REG j CRS progress.
And be the flow chart that PHICH channel estimations are carried out according to neighbouring CRS information with reference to shown in Fig. 3 for PHICH channel estimations, it can specifically include：
Step 301:Judge whether to have in the RE that three used in PHICH transmissions resource element groups REG are included RE to carry CRS, if it is, into step 302;If it is not, then into step 303;
An ancient weapon made of bamboo sets base station and is configured with N number of CRS port (ortO, port (N-l)), and N is positive integer, and representative value is 1,2 or 4;Need whether carry CRS on the RE that three resource element groups REG for first determining whether PHICH channel occupancies are included in this step.
Step 302:The CRS carried in the RE that three REG are included carries out PHICH channel estimations as target CRS, and according to the target CRS；
If REG j (j=0 of the PHICH channel occupancies, K-l port i (i=0 is included in),, N-l) CRS, wherein, K=3, shellfish ' J REG j port i (i=0, N-l) on the neighbouring port i of CRS and/or REG j of the channel estimation then based on the port i in REG j CRS carry out；Step 303：PHICH channel estimations are carried out according to the target CRS.
Otherwise, the channel estimation on REG j port i is then based only on the neighbouring port i of REG j CRS progress.
Step S 103, the result according to the channel estimation carry out PCFICH the and/or PHICH Channel Detections.
The demodulation detection of PCFICH and/or PHICH channels is realized further according to step S102 channel estimation results, PCFICH and/or PHICH channels are detected.
It can be seen that, in embodiments of the present invention, as long as including port i (i=0, N-l) CRS in the REG j (j=0, K-l) of PCFICH channels or PHICH channel occupancies, shellfish ' J PCFICH Or the channel estimation on the port i in the REG j of PHICH channel occupancies just can be neighbouring the CRS and/or REG j based on the port i in REG j port i CRS carry out；Otherwise, the CRS progress that the channel estimation on REG j port i then can only be based on port i neighbouring REG j.Wherein, neighbouring port i CRS occupies the part in the port i CRS on the whole carrier wave of a sub- frame in.
Because in embodiments of the present invention, terminal only need to the CRS carried on the RE that is included based on REG and/or with RE used in PCFICH and/or PHICH transmissions is neighbouring and RE of carrying CRS on CRS carry out channel estimation, so low side MTC terminal only needs to store limited CRS values, narrow band channel estimation can be carried out based on limited CRS, realize the demodulation detection of PCFICH and/or PHICH channels, further, low side MTC terminal need not be developed by the way of the embodiment of the present invention, the inexpensive feature of low side MTC terminal can also be kept.Based on same inventive concept, the channel detection method provided according to the above embodiment of the present invention, correspondingly, the embodiment of the present invention additionally provide a kind of Channel Detection device, and its structural representation is as shown in figure 4, specifically include：
Determining module 401, for determining the target CRS on neighbouring and carrying public reference signal CRS the RE with the resource element RE used for PCFICH and/or PHICH transmission.
It is described to be adjacent to CRS information：The close CRS with RE running time-frequency resources, including the CRS close with other subcarriers in the same OFDM symbols of RE, and/or, the CRS in the OFDM symbol adjacent with RE.Wherein, the number of the neighbouring CRS is determined according to the demand of PHICH and/or PCFICH Channel Detections.
Channel estimation module 402, the channel estimation for carrying out PCFICH the and/or PHICH channels according to the target CRS.
With reference to shown in Fig. 5, when carrying out PCFICH channel estimations, the channel estimation module 402 can specifically include：
First judging submodule 501, for judging four resource elements used in PCFICH transmissions Whether there is RE to carry CRS in the RE that group REG is included;
First estimation submodule 502, in the case of being in the result of first judging submodule, the CRS carried in the RE that four REG are included carries out PCFICH channel estimations as target CRS, and according to the target CRS；
Second estimation submodule 503, in the case of being no in the result of first judging submodule, PCFICH channel estimations are carried out according to the target CRS.
With reference to shown in Fig. 6, when carrying out PHICH channel estimations, the channel estimation module can specifically include：
Second judging submodule 601, for judging whether there is RE to carry CRS in the RE that three resource element groups REG used in PHICH transmissions are included；
3rd estimation submodule 602, in the case of being in the result of second judging submodule, the CRS carried in the RE included according to three REG carries out PHICH channel estimations as target CRS, and according to the target CRS；
4th estimation submodule 603, in the case of being no in the result of second judging submodule, PHICH channel estimations are carried out according to the target CRS.
Channel detection module 403, PCFICH and/or PHICH Channel Detections are carried out for the result according to the channel estimation.
Because in embodiments of the present invention, Channel Detection device only need to the CRS carried on the RE that is included based on REG and/or with RE used in PCFICH and/or PHICH transmissions is neighbouring and RE of carrying CRS on CRS carry out channel estimation, so low side MTC terminal only needs to store limited CRS values, narrow band channel estimation can be carried out based on limited CRS, realize the demodulation detection of PCFICH and/or PHICH channels.It is a kind of hardware architecture diagram of user equipment provided in an embodiment of the present invention with reference to shown in Fig. 7, including at least one processor 701 (such as CPU), at least one network interface 702 or other communication interfaces, Memory 703, and at least one communication bus 704, for realizing the connection communication between these devices.Wherein, the processor 701 is used to perform the executable module stored in the memory 703, such as computer program.Memory 703 may include high-speed random access memory（RAM:Random Access Memory), it is also possible to also including the non-labile person's of depositing device（Non- volatile memory), for example, at least one magnetic disk storage.(can be wired or wireless by least one network interface 702）The communication connection between the system gateway and at least one other network element is realized, internet, wide area network, LAN, Metropolitan Area Network (MAN) etc. can be used.In some embodiments, the memory 703 stores the programmed instruction for being performed by the processor 701, programmed instruction can be performed by processor 701, programmed instruction includes the channel estimation module 402 of determining module 401 and channel detection module 403, wherein, the realization of modules may be referred to the corresponding module disclosed in Fig. 4, and no longer Redundant is stated here.Device provided in an embodiment of the present invention, only need to the CRS that is carried on the RE that is included based on REG and/or with RE used in PCFICH and/or PHICH transmissions is neighbouring and RE of carrying CRS on CRS carry out channel estimation, so low side MTC terminal only needs to store limited CRS values, narrow band channel estimation can be carried out based on limited CRS, realize the demodulation detection of PCFICH and/or PHICH channels.Based on same inventive concept, the channel detection method provided according to the above embodiment of the present invention, correspondingly, the embodiment of the present invention additionally provide a kind of MTC terminal, and the terminal can include foregoing Channel Detection device.Low side MTC terminals need not be developed by the way of the embodiment of the present invention, moreover it is possible to keep low side MTC terminal Shi cost characteristics.
It should be noted that, herein, such as first and second or the like relational terms are used merely to make a distinction an entity or operation with another entity or operation, and not necessarily require or imply between these entities or operation there is any this actual relation or order.And, term " including ", " including " or any other variant thereof is intended to cover non-exclusive inclusion, so that process, method, article or equipment including a series of key elements not only include those key elements, but also including being not expressly set out Other key elements, or also include for this process, method, article or the intrinsic key element of equipment.In the absence of more restrictions, the key element limited by sentence " including one ... ... ", it is not excluded that also there is other identical element in the process including the key element, method, article or equipment.Bright spirit and scope.So, if these modifications and variations of the present invention belong within the scope of the claims in the present invention and its equivalent technologies, then the present invention is also intended to comprising including these changes and modification.

Claims (1)

  1. Claim
    1st, a kind of channel detection method, it is characterised in that including：
    It is determined that with indicating that channel PHICH transmission resource element RE used is neighbouring and carries the target CRS on public reference signal CRS RE for Physical Control Format Indicator Channel PCFICH and/or physical mixed;Described neighbouring refers to：Carry the interval RE numbers between the RE and the RE used for PCFICH or PHICH transmission of the CRS and be no more than preset value, and the storages of the mechanical type communication terminal MTC UE based on preset value CRS Slow rushes device size and rushes device size less than the standard UE Slow for storing CRS：
    The channel estimation of the PCFICH and/or PHICH channels is carried out according to the target CRS；Result according to the channel estimation carries out PCFICH the and/or PHICH Channel Detections.
    2nd, the method as described in claim 1, it is characterised in that described to carry out PCFICH channel estimations according to the target CRS information, including：
    Judge whether there is RE to carry CRS in the RE that four used in PCFICH transmissions resource element groups REG are included, if, the CRS carried in the RE that then four REG are included carries out PCFICH channel estimations as target CRS, and according to the target CRS.
    3rd, the method as described in claim 1, it is characterised in that carry out PHICH channel estimations according to the target CRS information, including：
    Judge whether there is RE to carry CRS in the RE that three used in PHICH transmissions resource element groups REG are included, if, the CRS carried in the RE that then three REG are included carries out PHICH channel estimations as target CRS, and according to the target CRS.
    4th, the method as described in claim 1, it is characterised in that the target CRS includes：The CRS on other subcarriers with PCFICH and/or PHICH transmission in the same orthogonal frequency division multiplex OFDM symbols of RE used, and/or, the CRS in the OFDM symbol adjacent with the RE that PCFICH and/or PHICH transmission is used.
    5th, the method as described in claim 1, it is characterised in that the time-domain resource position of the target CRS Put, frequency domain resource position and RE numbers corresponding to target CRS are predetermined.
    6th, method as claimed in claim 5, it is characterized in that, wherein, the RE numbers corresponding to the time-domain resource position of the target CRS, frequency domain resource position and target CRS are predefined with specific reference to the demand and/or base band signal process ability of PHICH and/or PCFICH Channel Detections.
    7th, a kind of Channel Detection device, it is characterised in that including：
    Determining module, for determining the target CRS on neighbouring and carrying public reference signal CRS the RE with the resource element RE used for PCFICH and/or PHICH transmission;Described neighbouring refers to：Carry the interval RE numbers between the RE and the RE used for PCFICH or PHICH transmission of the CRS and be no more than preset value, and the storages of the mechanical type communication terminal MTC UE based on preset value CRS Slow rushes device size and rushes device size less than the standard UE Slow for storing CRS；
    Channel estimation module, the channel estimation for carrying out PCFICH the and/or PHICH channels according to the target CRS；
    Channel detection module, PCFICH and/or PHICH Channel Detections are carried out for the result according to the channel estimation.
    8th, device as claimed in claim 7, it is characterised in that the channel estimation module includes：First judging submodule, for judging whether there is RE to carry CRS in the RE that four resource element groups REG used in PCFICH transmissions are included;
    First estimation submodule, in the case of being in the result of first judging submodule, the CRS carried in the RE included according to four REG carries out PCFICH channel estimations as target CRS, and according to the target CRS.
    9th, device as claimed in claim 7, it is characterised in that the channel estimation module includes：Second judging submodule, for judging whether there is RE to carry CRS in the RE that three resource element groups REG used in PHICH transmissions are included;
    Second estimation submodule, for in the case of being, the CRS carried in the RE that three REG are included to be as target CRS, and according to the target CRS in the result of second judging submodule Carry out PHICH channel estimations.
    10th, a kind of MTC terminal, it is characterised in that including the device described in any one of claim 79.
    11st, a kind of MTC terminal, including at least one processor, at least one network interface or other communication interfaces, memory, and at least one communication bus, for realizing the connection communication between these devices；Wherein,
    Store for by the programmed instruction of the computing device, wherein, programmed instruction includes determining module, channel estimation module and channel detection module；The determining module, for determining the target CRS on neighbouring and carrying public reference signal CRS the RE with the resource element RE used for PCFICH and/or PHICH transmission;Described neighbouring refers to：Carry the interval RE numbers between the RE and the RE used for PCFICH or PHICH transmission of the CRS and be no more than preset value, and the storages of the mechanical type communication terminal MTC UE based on preset value CRS Slow rushes device size and rushes device size less than the standard UE Slow for storing CRS：The channel estimation module, the channel estimation for carrying out PCFICH the and/or PHICH channels according to the target CRS；The channel detection module, PCFICH and/or PHICH Channel Detections are carried out for the result according to the channel estimation.
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