CN103686739A - CPC (Cognitive Pilot Channel) transmitting and receiving method and equipment thereof - Google Patents
CPC (Cognitive Pilot Channel) transmitting and receiving method and equipment thereof Download PDFInfo
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Abstract
The invention discloses a CPC (Cognitive Pilot Channel) transmitting and receiving method and equipment thereof. By adopting the method and the equipment, compared with the conventional out-of-band CPC, the method and the equipment need no extra distributed authorized frequency band and improve the flexibility of CPC application on premise that the conventional frequency spectrum policy is not changed, and compared with in-band CPC, the method and the equipment expand the application range of CPC.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of CPC sending, receiving method and equipment thereof.
Background technology
Fast development along with mobile communication cause, contradiction between growing broadband wireless communications demand and limited frequency spectrum resource becomes clear day by day, although at LTE(Long Term Evolution, Long Term Evolution) system has adopted OFDM(Orthogonal Frequency Division Multiplexing, OFDM), MIMO(Multiple-Input Multiple-Output, multiple-input and multiple-output) etc. technology improves the availability of frequency spectrum, but these can not fundamentally solve the problem of frequency spectrum resource shortage.Along with the develop rapidly of mobile service, telecom operators will face the problem of severeer frequency spectrum resource shortage.On the other hand, the frequency spectrum of some wireless communication systems is used on time and region almost idle, as for radio and television frequency range, because Digital Transmission can improve transmission capacity greatly, therefore along with the development of radio data system from analogue transmission to Digital Transmission, make a lot of radio and television frequency ranges for a long time in idle condition, wasted valuable Radio Resource.And other a lot of wireless communication systems are also proved to be its frequency spectrum, are not obtained and make full use of.
For solving the problem of frequency spectrum resource shortage, cognitive radio (Cognitive Radio, CR) technology is paid close attention to widely.Cognitive radio is intelligent wireless communication system, by frequency spectrum perception, obtains the spendable idle resource of frequency range of current location, and the idle frequency range of the opportunistic use of energy, thereby improves frequency spectrum service efficiency, alleviates the situation of frequency spectrum resource anxiety.Cognition wireless electric energy sensing external environment, and use artificial intelligence technology from environment learning, by some operating parameter of real-time change (such as through-put power, carrier frequency and modulation technique etc.), the wireless signal statistical property that its internal state is adapted to receive changes, to reach following object: (1) any time, the height reliable communication in any place; (2) the effective utilization to frequency spectrum resource.
In order to reach above object, cognitive radio has encircled whole cognitive process by cognition, as shown in Figure 1, comprises following three steps: (1) frequency spectrum perception; (2) spectrum analysis; (3) frequency spectrum decision-making.Wherein, frequency spectrum perception is by the RF(Radio Frequency to input, radio frequency) analysis of pumping signal, complete the detection to idle frequency spectrum; Spectrum analysis is according to the result of frequency spectrum perception and the analysis to other wireless input signal, completes the estimation of channel condition information and the expectation of channel capacity; Frequency spectrum decision-making is the idle frequency spectrum resource that obtains according to frequency spectrum perception and the result of spectrum analysis, obtains the decision-making that last frequency spectrum is used, and this decision-making comprises the decision-making of frequency, bandwidth, transmitting power, modulation system etc.
In existing cognitive radio technology, except obtain idle frequency spectrum information by frequency spectrum perception, can also obtain usable spectrum resource by the method for accessing database.In database, store the information such as frequency spectrum resource of regional free time, cognitive radio system is by reporting self geographical position information, the spectrum information that can access queries region of living in can use.
Existing wireless rule is to be different business fixed partition frequency ranges, such as the frequency distribution of broadcasting service is in intermediate frequency (MF), and high frequency (HF), very high frequency(VHF) (VHF), or low superfrequency (UHF), and the frequency distribution of mobile service is in high superfrequency (UHF), hyperfrequency (SHF).In certain frequency range, authorize the system of work to be referred to as authoring system, but authoring system may can't be used the frequency range of whole distribution completely, thereby make a lot of frequency ranges in the free time.The opportunistic use idle frequency spectrum of cognitive radio system resource, its schematic diagram can be as shown in Figure 2.
Cognitive pilot channel (Cognitive Pilot Channel, CPC) is in the ETSI(European Telecommunication Standards Institute of standardization body, ETSI) in possess some special knowledge.This channel is by carrying cognitive pilot channel content (CPC Content), for the cognitive radio system/equipment of this channel overlay area provides cognitive relevant information, its schematic diagram can as shown in Figure 3, comprise operator, the access technology of existence, the frequency of each access technology work etc. that available idle frequency point information, the frequency spectrum relevant policies on available frequency, this region exist.Cognitive pilot channel receiving terminal, by monitoring cognitive pilot channel, obtains the cognitive relevant information in this region, such as available idle frequency point information, the information such as frequency spectrum relevant policies on available frequency according to the cognitive pilot channel content receiving.
The Main Function of the proposition of cognitive pilot channel comprises:
1) startup stage be that terminal provides support
At dynamic spectrum, use in heterogeneous network environment, terminal will be found a radio access technologies network before access network, and due to the dynamic frequency spectrum usage mode of heterogeneous network, terminal need to expend a lot of power and time overhead carrys out search network.By the wireless access technology relevant parameter that provides current region to use with outer cognitive pilot channel (Out-of-band CPC), thereby can find fast access network by accessory terminal.
2) support the use of the second frequency spectrum
Cognitive radio system needs to detect the idle frequency spectrum of current region before setting up communication link, and when the frequency band that detects when needs is wider, this also needs to consume a lot of power and time.By the idle frequency spectrum resource that can provide current region to use for cognitive radio system with outer cognitive pilot channel, also can assist frequency spectrum perception to reduce the expense of frequency spectrum perception.
3) support the optimization of Radio Resource
In heterogeneous network environment, by cognitive pilot channel, provide the carrying of RRM demand transmission.
In existing cognitive pilot channel technical scheme, cognitive pilot channel comprises cognitive pilot channel (In-band CPC) in the outer cognitive pilot channel of band and band.Wherein:
(a) the outer cognitive pilot channel of band
The outer cognitive pilot channel of band is simultaneously to having logic channel and physical channel.At the cognitive pilot channel of physical layer, need extra mandate frequency resource, and by specific access technology, launch this channel in this mandate frequency, as GSM(Global System for Mobile Communications, global system for mobile communications), UMTS(Universal Mobile Telecommunications System, universal mobile telecommunications system), LTE(Long Term Evolution, Long Term Evolution) or the access technology of eating dishes without rice or wine that redefines.
The outer cognitive pilot channel of band is with respect to cognitive pilot channel in band, and the scope of application is larger.At any time, cognitive radios, as long as receive this channel at fixing frequency location, just can obtain cognitive pilot channel content information.
As shown in Figure 4, be the schematic diagram of a kind of transmission means with outer cognitive pilot channel of the prior art.Wherein, management entity provides relevant cognitive information, as information such as available access technology, idle frequence resources; Cognitive pilot channel manager (CPC Manager), according to cognitive information, forms cognitive pilot channel content and configures cognitive pilot channel associated transmissions parameter, and cognitive pilot channel outside band is launched in fixing frequency by certain access technology.
(b) cognitive pilot channel in band
In band, cognitive pilot channel, only as a kind of logic channel, carries the channel of this logic, thereby cognitive information is provided by existing wireless access system in physical layer.
In band, the scope of application of cognitive pilot channel is narrow, only have and be linked into certain wireless network (such as GSM, TD-SCDMA(Time Division-Synchronization Code Division Multiple Access, the CDMA (Code Division Multiple Access) that the time-division is synchronous) network when cognitive radios) after could receiving belt in cognitive pilot channel.Startup stage, because cognitive radios does not also have access network, cannot provide cognitive pilot channel content information for cognitive radios by this channel.
As shown in Figure 5, be the schematic diagram of a kind of transmission means with interior cognitive pilot channel in prior art.Wherein, management entity provides relevant cognitive information, as information such as available access technology, idle frequence resources; Cognitive pilot channel manager, according to cognitive information, forms cognitive pilot channel content and configures certain existing wireless access technology in heterogeneous network, by this wireless access technology, provides cognitive pilot channel.
In realizing process of the present invention, inventor finds at least to exist in prior art following problem:
In prior art, in band, the scope of application of cognitive pilot channel is narrow, the startup stage of receiving device, can not use; And the outer cognitive pilot channel of band need to be launched this channel in fixing mandate frequency resource, under existing frequency spectrum Plan Rule, be difficult to for cognitive pilot channel, additionally separate a part of frequency again.
Summary of the invention
The invention provides a kind of CPC sending, receiving method and equipment thereof, to expand the scope of application of CPC, improve the flexibility that CPC is used.
In order to reach above object, the embodiment of the present invention provides a kind of cognitive pilot channel CPC sending method, comprising:
CPC sending ending equipment obtains for sending frequency and the time parameter of CPC, and according to described frequency and time parameter, determines the temporal frequency pattern that sends CPC;
When described CPC sending ending equipment need to send CPC, described CPC sending ending equipment obtains the idle frequency spectrum resource information of one's respective area, and according to the idle frequency spectrum resource information getting, and described temporal frequency pattern, determine that this sends time and the frequency resource of CPC;
Described CPC sending ending equipment sends described CPC in determined time and frequency resource.
The embodiment of the present invention also provides a kind of cognitive pilot channel CPC method of reseptance, comprising:
CPC receiving device obtains for sending frequency and the time parameter of CPC, and determines according to described frequency and time parameter the Candidate Frequency resource that CPC sends;
Described CPC receiving device is searched for CPC in described Candidate Frequency resource, and when searching CPC, obtains the time synchronization information of described CPC;
Described CPC receiving device, according to described time synchronization information and described frequency and time parameter, is determined the temporal frequency pattern that receives described CPC;
Described CPC receiving device receives described CPC according to described temporal frequency pattern.
The embodiment of the present invention also provides a kind of cognitive pilot channel CPC sending ending equipment, comprising:
The first acquisition module, for obtaining for sending frequency and the time parameter of CPC;
The first determination module, for determining according to described frequency and time parameter the temporal frequency pattern that sends CPC;
The second acquisition module, for when described CPC sending ending equipment need to send CPC, obtains the idle frequency spectrum resource information of one's respective area;
The second determination module, for according to described idle frequency spectrum resource information, and described time and frequency pattern, determine that this sends time and the frequency resource of CPC;
Sending module, for sending described CPC in definite time of described the second determination module and frequency resource.
The embodiment of the present invention also provides a kind of cognitive pilot channel CPC receiving device, comprising:
The first acquisition module, for obtaining for sending frequency and the time parameter of CPC, and determines according to described frequency and time parameter the Candidate Frequency resource that CPC sends;
The first determination module, for determining according to described frequency and time parameter the Candidate Frequency resource that CPC sends;
Search module, for searching for CPC in described Candidate Frequency resource;
The second acquisition module, for when described search module searches CPC, obtains the time synchronization information of described CPC;
The second determination module, for according to described time synchronization information and described frequency and time parameter, determines the temporal frequency pattern that receives described CPC;
Receiver module, for receiving described CPC according to described temporal frequency pattern.
In the above-described embodiments, for CPC sending ending equipment, by obtaining for sending frequency and the time parameter of CPC, and determine transmission CPC temporal frequency pattern according to this frequency and time parameter; When needs send CPC, obtain the idle frequency spectrum resource information of one's respective area, and according to this idle frequency spectrum resource information and temporal frequency pattern, determine that this sends time and the frequency resource of CPC, and send CPC in determined time and frequency resource; For CPC receiving device, by obtaining for sending frequency and the time parameter of CPC, and determine according to this frequency and time parameter the available frequency resources that CPC sends, and search for CPC in this available frequency resources, when searching CPC, obtain the time synchronization information of this CPC; According to this time synchronization information and frequency and the definite temporal frequency pattern that receives CPC of time parameter, and receive CPC according to this temporal frequency pattern, by adopting the present invention, CPC outside existing band, do not need additional allocation mandate frequency range, do not changing under the prerequisite of existing frequency spectrum policy, improving the flexibility that CPC is used; Than the interior CPC of band, expanded the scope of application of CPC.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of cognitive ring in prior art;
Fig. 2 is the frequency spectrum usage mode schematic diagram of cognitive radio in prior art;
Fig. 3 is CPC use scenes schematic diagram in prior art;
Fig. 4 is that in prior art, the outer CPC of band sends schematic diagram;
Fig. 5 is that in prior art, the interior CPC of band sends schematic diagram;
The schematic flow sheet of a kind of CPC sending method that Fig. 6 provides for the embodiment of the present invention;
The schematic diagram of the frequency time pattern of a kind of CPC of transmission that Fig. 7 provides for the embodiment of the present invention;
Time and frequency resource schematic diagram that a kind of CPC that Fig. 8 provides for the embodiment of the present invention sends;
The schematic diagram that a kind of CPC that Fig. 9 provides for the embodiment of the present invention sends;
The schematic flow sheet of a kind of CPC method of reseptance that Figure 10 provides for the embodiment of the present invention;
A kind of CPC frequency diversity reception & disposal schematic diagram that Figure 11 provides for the embodiment of the present invention;
The structural representation of a kind of CPC sending/receiving end that Figure 12 provides for the embodiment of the present invention;
The schematic diagram of the frequency time pattern of the transmission CPC under a kind of concrete application scenarios that Figure 13 provides for the embodiment of the present invention;
Time and frequency resource schematic diagram that CPC under a kind of concrete application scenarios that Figure 14 provides for the embodiment of the present invention sends;
The structural representation of a kind of CPC sending ending equipment that Figure 15 provides for the embodiment of the present invention;
The structural representation of a kind of CPC receiving device that Figure 16 provides for the embodiment of the present invention.
Embodiment
For above-mentioned problems of the prior art, the embodiment of the present invention provides a kind of technical scheme of CPC sending and receiving.In this technical scheme, for CPC sending ending equipment, by obtaining for sending frequency and the time parameter of CPC, and determine transmission CPC temporal frequency pattern according to this frequency and time parameter; When needs send CPC, obtain the idle frequency spectrum resource information of one's respective area, and according to this idle frequency spectrum resource information and temporal frequency pattern, determine that this sends time and the frequency resource of CPC, and send CPC in determined time and frequency resource; For CPC receiving device, by obtaining for sending frequency and the time parameter of CPC, and determine according to this frequency and time parameter the available frequency resources that CPC sends, and search for CPC in this available frequency resources, when searching CPC, obtain the time synchronization information of this CPC; According to this time synchronization information and frequency and the definite temporal frequency pattern that receives CPC of time parameter, and receive CPC according to this temporal frequency pattern.
Wherein, frequency and time parameter can comprise: the transmitting available centre frequency of CPC and bandwidth, transmission cycle, sending duration and adjacent time and the time migration between frequency resource;
Described temporal frequency pattern can comprise: each CPC sends the cycle of lasting time, each CPC transmission and available centre frequency and the bandwidth of each CPC transmitting.
Below in conjunction with the accompanying drawing in embodiments of the invention, the technical scheme in embodiments of the invention is clearly and completely described, obviously, the embodiments described below are only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, other embodiment that those of ordinary skills obtain, belong to the scope that embodiments of the invention are protected.
Embodiment mono-
As shown in Figure 6, the schematic flow sheet of a kind of CPC sending method providing for the embodiment of the present invention, can comprise the following steps:
Step 601, CPC sending ending equipment obtain for sending frequency and the time parameter of CPC, and according to this frequency and time parameter, determine the temporal frequency pattern that sends CPC.
Concrete, in embodiments of the present invention, can be according to related protocol (as 3GPP(3rd Generation Partnership Project, third generation partner program) serial protocols etc.) be configured for frequency and the time parameter that sends CPC, should can be stored in CPC sending ending equipment and CPC receiving device for sending frequency and the time parameter of CPC, also can send to CPC sending ending equipment and CPC receiving device by the mode being carried in control information, the frequency and the time parameter that with indication CPC sending ending equipment and CPC receiving device, are used for sending CPC.
Correspondingly, at initial phase, CPC sending ending equipment can obtain local storage for sending frequency and the time parameter of CPC, or obtain in the control information receiving, carry for sending frequency and the time parameter of CPC; This frequency and time parameter can comprise and send the available centre frequency of CPC and the time migration between bandwidth, transmission cycle, sending duration, adjacent time and frequency resource.
CPC sending ending equipment gets for sending after the frequency and time parameter of CPC, can determine the temporal frequency pattern that sends CPC according to this frequency and time parameter, its schematic diagram can as shown in Figure 7, can comprise: each CPC sends the cycle of lasting time, each CPC transmission and available centre frequency and the bandwidth that each CPC sends.Wherein, a CPC takies a continuous time and frequency resource.
Step 602, when CPC transmitting terminal equipment need to send CPC, this CPC transmitting terminal is obtained the idle frequency spectrum resource information of one's respective area, and according to this idle frequency spectrum resource information and temporal frequency pattern, determines that this sends time and the frequency resource of CPC.
Concrete, CPC sending ending equipment is before each CPC sends, all need to obtain the idle frequency spectrum resource information of one's respective area, and determine that according to the idle frequency spectrum resource information getting and above-mentioned temporal frequency pattern this sends time and the frequency resource of CPC, its schematic diagram can be as shown in Figure 8.
Wherein, CPC sending ending equipment can obtain by modes such as Query Database or frequency spectrum perception the idle frequency spectrum resource of one's respective area; When CPC sending ending equipment gets after the idle frequency spectrum resource of one's respective area, can determine that this sends candidate's time and the frequency resource of CPC according to temporal frequency pattern definite in step 601, and will in this candidate's time and frequency resource, belong to time and the frequency resource of idle frequency spectrum resource, be defined as frequency and time resource that this sends CPC.
Preferably, when when CPC sending ending equipment, this sends and to get idle frequency spectrum resource before CPC and comprise the frequency resource that sent CPC last time, this CPC sending ending equipment this while sending CPC, use the frequency resource identical with sending CPC last time.
Step 603, CPC sending ending equipment send CPC in determined time and frequency resource.
Concrete, CPC sending ending equipment was determined after this time and frequency resource that sends CPC use, coding and the modulation technique that this CPC content information can be adopted through certain access technology (as LTE, CDMA etc.) and frame structure is encoded, modulation, framing, then proportion diversity mode is mapped in this time that sends CPC use and frequency resource and sends, and its schematic diagram can be as shown in Figure 9.
Suppose that CPC sending ending equipment determined that K sends time and the frequency resource of CPC for this, this CPC sending ending equipment can be by the CPC content information after coded modulation framing, in K the time that is mapped to respectively that this sends that CPC uses and frequency resource, sends; Wherein, in a CPC process of transmitting, each time is identical with the CPC content information sending in frequency resource.
Embodiment bis-
As shown in figure 10, the schematic diagram of a kind of CPC method of reseptance flow process providing for the embodiment of the present invention, can comprise the following steps:
Concrete, in embodiments of the present invention, can be according to related protocol (as 3GPP(3rd Generation Partnership Project, third generation partner program) serial protocols etc.) be configured for frequency and the time parameter that sends CPC, should can be stored in CPC sending ending equipment and CPC receiving device for sending frequency and the time parameter of CPC, also can send to CPC sending ending equipment and CPC receiving device by the mode being carried in control information, the frequency and the time parameter that with indication CPC sending ending equipment and CPC receiving device, are used for sending CPC.
At initial phase, CPC receiving device can obtain local storage for sending frequency and the time parameter of CPC, or obtain in the control information receiving, carry for sending frequency and the time parameter of CPC; This frequency and time parameter can comprise and send the available centre frequency of CPC and the time migration between bandwidth, transmission cycle, sending duration, adjacent time and frequency resource.CPC receiving device gets for sending after the frequency and time parameter of CPC, can determine the Candidate Frequency resource that CPC sends according to this frequency and time parameter.Preferably, CPC receiving device obtains for sending the frequency of CPC and the mode of time parameter and CPC sending ending equipment and obtains for sending the frequency of CPC and the mode of time parameter is consistent.
Concrete, in embodiments of the present invention, CPC sending ending equipment sends in the frequency resource of CPC, also can send relevant synchronizing information (as TD-TLE down-going synchronous information).CPC receiving device can be searched for CPC by the mode of search synchronizing information, when CPC receiving device searches synchronizing information in certain Candidate Frequency resource, think and search CPC in this Candidate Frequency resource, and according to for sending the frequency of CPC and the time synchronization information that time parameter is determined this CPC.
Concrete, CPC receiving device has got after the time synchronization information of CPC, can be according to this time synchronization information, and send time migration equifrequent and the time parameter between the available centre frequency of CPC and bandwidth, the transmission cycle of CPC, the sending duration of CPC, side frequency resource, determine the temporal frequency pattern that receives CPC.
Concrete, CPC receiving device is determined after the temporal frequency pattern that receives CPC, according to this temporal frequency pattern, when each CPC receives, in corresponding time and frequency resource, receives CPC.
Wherein, when the mode of CPC sending ending equipment by frequency diversity sends CPC, CPC receiving terminal receives after the CPC sending in each time and frequency resource, can by frequency diversity processing mode, obtain this CPC content information, concrete frequency diversity processing mode can comprise: select to merge (Selection Combining), high specific merging (Maximal-Ratio Combining), geometric ratio merging (Equal Gain Combining) etc.CPC receiving device can be as shown in figure 11 by the schematic diagram of frequency diversity processing mode reception CPC.
The technical scheme that the application scenarios of lower mask body provides the embodiment of the present invention is further described in more detail.
In this embodiment, CPC sending ending equipment is the Femto(Home eNodeB in this channel coverage by CPC) cognitive radios provides CPC content information, comprises available idle frequency point information in this content information.Femto cognitive radios just can be obtained the idle frequency point information of one's respective area by monitoring CPC, thereby works in idle frequency resource.
Wherein, the upper layer packets of CPC sending ending equipment is containing CPC manager and database.CPC manager, according to the coverage of CPC and available free frequency spectrum resource information, forms CPC content (CPC Content).Database is used for providing available free frequency resource.Is base station under CPC manager, this base station adopts TD-LTE(Time Division Long Term Evolution, time-division Long Term Evolution) access technology, for sending CPC, and supposes that there is very strong physical layer signal disposal ability (as wider RF bandwidth) this base station.CPC receiving device is Femto cognitive radios, and this equipment obtains available idle frequence resource information by monitoring CPC, and works in idle frequence resource.
Further, suppose that the frequency range that CPC and Femto cognitive radios can be worked is 606MHz-806MHz, and according to protocol specification, the centre frequency that this frequency range CPC can send, bandwidth, transmission cycle, duration are as shown in table 1:
The relevant parameter that table 1 CPC can send
CPC manager obtains each TV channel spectrum and uses information, and forms CPC content, and this CPC content can be as shown in table 2:
Table 2 CPC content
Referring to Figure 12, be a kind of CPC sending/receiving end configuration diagram that the embodiment of the present invention provides, based on this framework, the specific implementation process of the CPC sending/receiving that the embodiment of the present invention provides can be as follows:
(1) transmitting terminal is processed
(a) initial phase
CPC manager is according to certain agreement (as LTE agreement), obtain for sending frequency and the time parameter of CPC, this frequency and time parameter comprise that available centre frequency and bandwidth, CPC that CPC sends send the time migration parameter between cycle, CPC sending duration and side frequency resource.
The frequency that CPC manager obtains according to said process and time parameter, determine for self system, the temporal frequency pattern that CPC sends, the parameter of this temporal frequency pattern comprises center frequency point and bandwidth that CPC sends, sends the time of CPC etc. at every turn, in this embodiment can be as shown in figure 13.
(b) carry out the stage
Each, send before CPC, CPC manager forms the CPC content of this transmission, and its specifying information comprises that the frequency spectrum of each TV channel of TV frequency range is used the maximum transmit power restriction (its form can be as shown in table 2) on idle frequency of state and cognitive radio system.
Each, send before CPC, CPC manager obtains the idle frequency spectrum resource information in CPC overlay area by data query, supposes, m, m+1, m+2 and m+3 CPC send, and idle frequency spectrum resource is as shown in table 3:
Table 3
The temporal frequency pattern of the idle frequency spectrum resource that CPC transmitting terminal has according to this transmission and said process definition, determines that this CPC sends the temporal frequency resource of using.In this embodiment, m, m+1, m+2 and m+3 transmission are used time and frequency resource can be as shown in figure 14.
The CPC content that CPC transmitting terminal need to send this according to TD-LTE agreement encode, the processing such as modulation, framing, form the TD-LTE signal field of the 5ms length of 1.4MHz bandwidth, and this TD-LTE signal field is mapped to respectively on the time and frequency resource of this CPC transmission use.For example, send, TD-LTE signal field is mapped to respectively on these two frequencies of 649.3 ~ 650.7MHz, 749.3 ~ 750MHz and is sent for the m time.
(2) receiving terminal is processed
(a) initial phase
Femto equipment is at initial phase, according to the agreement of agreement (consistent with CPC transmitting terminal), the available centre frequency and bandwidth, the CPC that obtain this frequency range CPC transmission send time migration equifrequent and time parameter between cycle, CPC sending duration and adjacent time resource.
Femto equipment, according to said frequencies and time parameter, is determined the Candidate Frequency resource (649.3 ~ 650.7MHz, 699.3 ~ 700.7MHz, 749.3 ~ 750.7MHz, 799.3 ~ 800.7MHz) that CPC sends, and search for CPC in Candidate Frequency resource.Wherein, in this embodiment, Femto equipment can be searched for CPC by search for the mode of TD-LTE downlink synchronous signal in Candidate Frequency resource, and when searching TD-LTE downlink synchronous signal, determines in corresponding candidate frequency resource and have CPC to send.
When Femto equipment searches after the CPC in certain candidate's resource, can obtain the time synchronization information of this frequency resource CPC, and according to this time synchronization information, determine the time location that may have CPC in other frequency upper frequency resource.
(b) carry out the stage
When Femto equipment is carried out CPC reception at every turn, on time location corresponding to 649.3 ~ 650.7MHz, 699.3 ~ 700.7MHz, 749.3 ~ 750.7MHz, 799.3 ~ 800.7MHz frequency resource, receive signal, and signal is carried out to diversity merging, for example, can adopt selection diversity to process, receiving respectively 4 locational signals of frequency resource, select a SNR(Signal Noise Ratio, signal to noise ratio) signal that receives in maximum frequency resource is as final reception signal.
Femto equipment receives after signal, can be according to TD-LTE agreement, the signal that diversity is merged after processing carries out the operations such as demodulation, decoding, obtains CPC content, according to CPC content information, obtain the idle frequency resource that this region can be used, and select an available frequency resource to carry out work.
By above description, can find out, in embodiments of the present invention, for CPC sending ending equipment, by obtaining for sending frequency and the time parameter of CPC, and determine transmission CPC temporal frequency pattern according to this frequency and time parameter; When needs send CPC, obtain the idle frequency spectrum resource information of one's respective area, and according to this idle frequency spectrum resource information and temporal frequency pattern, determine that this sends time and the frequency resource of CPC, and send CPC in determined time and frequency resource; For CPC receiving device, by obtaining for sending frequency and the time parameter of CPC, and determine according to this frequency and time parameter the available frequency resources that CPC sends, and search for CPC in this available frequency resources, when searching CPC, obtain the time synchronization information of this CPC; According to this time synchronization information and frequency and the definite temporal frequency pattern that receives CPC of time parameter, and receive CPC according to this temporal frequency pattern, by adopting the present invention, CPC outside existing band, do not need additional allocation mandate frequency range, do not changing under the prerequisite of existing frequency spectrum policy, improving the flexibility that CPC is used; Than the interior CPC of band, expanded the scope of application of CPC.
Based on the identical technical conceive of said method embodiment, the embodiment of the present invention also provides a kind of CPC sending ending equipment, can be applied in said method flow process.
As shown in figure 15, the structural representation of a kind of CPC sending ending equipment providing for the embodiment of the present invention, can comprise:
The first acquisition module 11, for obtaining for sending frequency and the time parameter of CPC;
The first determination module 12, for determining according to described frequency and time parameter the temporal frequency pattern that sends CPC;
The second acquisition module 13, for when described CPC sending ending equipment need to send CPC, obtains the idle frequency spectrum resource information of one's respective area;
The second determination module 14, for according to described idle frequency spectrum resource information, and described time and frequency pattern, determine that this sends time and the frequency resource of CPC;
Sending module 15, for sending described CPC in definite time of described the second determination module 12 and frequency resource.
Wherein, described the first acquisition module 11 specifically for, obtain local storage for sending frequency and the time parameter of CPC, described frequency and time parameter are pre-configured, and are stored in CPC sending ending equipment and CPC receiving device; Or,
Obtain in the control information receiving, carry for sending frequency and the time parameter of CPC, described control information is used to indicate described CPC sending ending equipment and CPC receiving device for sending frequency and the time parameter of CPC.
Wherein, described the second determination module 14 specifically for, according to described temporal frequency pattern, determine that this sends candidate's time and the frequency resource of CPC, and will in described candidate time and frequency resource, belong to time and the frequency resource of idle frequency spectrum resource, be defined as frequency and time resource that this sends CPC.
Wherein, described sending module 15 specifically for, by CPC content information encode, after modulation, framing, proportion diversity mode is mapped in definite time of described the second determination module and frequency resource and sends.
Wherein, described sending module 15 specifically for, when described the second determination module 14 determines that time that this sends CPC and frequency resource are K, by CPC content information after coded modulation framing, be mapped to respectively in a described K time and frequency resource and send; Wherein, K is positive integer.
Wherein, described frequency and time parameter comprise: the duration of the cycle that the available centre frequency that CPC sends and bandwidth, CPC send, CPC transmission and adjacent time and the time migration between frequency resource; Or/and,
Described temporal frequency pattern comprises: available centre frequency and bandwidth that the cycle that the lasting time that each CPC sends, each CPC send and each CPC send.
Based on the identical technical conceive of said method embodiment, the embodiment of the present invention also provides a kind of CPC receiving device, can be applied in said method flow process.
As shown in figure 16, the structural representation of a kind of CPC receiving device providing for the embodiment of the present invention, can comprise:
The first acquisition module 21, for obtaining for sending frequency and the time parameter of CPC, and determines according to described frequency and time parameter the Candidate Frequency resource that CPC sends;
The first determination module 22, for determining according to described frequency and time parameter the Candidate Frequency resource that CPC sends;
The second acquisition module 24, for when described search module 23 searches CPC, obtains the time synchronization information of described CPC;
The second determination module 25, for according to described time synchronization information and described frequency and time parameter, determines the temporal frequency pattern that receives described CPC;
Wherein, described the first acquisition module 21 specifically for, obtain local storage for sending frequency and the time parameter of CPC, described frequency and time parameter are pre-configured, and are stored in CPC receiving device and CPC sending ending equipment; Or,
Obtain in the control information receiving, carry for sending frequency and the time parameter of CPC, described control information is used to indicate described CPC sending ending equipment and CPC receiving device for sending frequency and the time parameter of CPC.
Wherein, described receiver module 26 specifically for, according to described temporal frequency pattern, determine that this receives time and the frequency resource of CPC, receive CPC, and proportion diversity processing mode obtains this CPC content information in described time and frequency resource.
Wherein, described frequency diversity processing mode comprises: select merging, high specific to merge or geometric ratio merging.
Wherein, described frequency and time parameter comprise: the duration of the cycle that the available centre frequency that CPC sends and bandwidth, CPC send, CPC transmission and adjacent time and the time migration between frequency resource; Or/and,
Described temporal frequency pattern comprises: available centre frequency and bandwidth that the cycle that the lasting time that each CPC sends, each CPC send and each CPC send.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Understanding based on such, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions are with so that a station terminal equipment (can be mobile phone, personal computer, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be looked protection scope of the present invention.
Claims (22)
1.
a cognitive pilot channel CPC sending method, is characterized in that, comprising:
cPC sending ending equipment obtains for sending frequency and the time parameter of CPC, and according to described frequency and time parameter, determines the temporal frequency pattern that sends CPC;
when described CPC sending ending equipment need to send CPC, described CPC sending ending equipment obtains the idle frequency spectrum resource information of one's respective area, and according to the idle frequency spectrum resource information getting, and described temporal frequency pattern, determine that this sends time and the frequency resource of CPC;
described CPC sending ending equipment sends described CPC in determined time and frequency resource.
2.
the method of claim 1, is characterized in that, described CPC sending ending equipment obtains for sending frequency and the time parameter of CPC, is specially:
described CPC sending ending equipment obtain local storage for sending frequency and the time parameter of CPC, described frequency and time parameter are pre-configured, and are stored in CPC sending ending equipment and CPC receiving device; Or,
described CPC sending ending equipment obtain in the control information receiving, carry for sending frequency and the time parameter of CPC, described control information is used to indicate described CPC sending ending equipment and CPC receiving device for sending frequency and the time parameter of CPC.
3.
the method of claim 1, is characterized in that, described CPC sending ending equipment is according to the idle frequency spectrum resource information getting, and described temporal frequency pattern, determines that this sends time and the frequency resource of CPC, is specially:
described CPC sending ending equipment determines that according to described temporal frequency pattern this sends candidate's time and the frequency resource of CPC, and will in described candidate time and frequency resource, belong to time and the frequency resource of idle frequency spectrum resource, be defined as frequency and time resource that this sends CPC.
4.
the method of claim 1, is characterized in that, described CPC sending ending equipment sends described CPC in determined time and frequency resource, is specially:
described CPC sending ending equipment by CPC content information encode, after modulation, framing, proportion diversity mode is mapped in determined time and frequency resource and sends.
5.
method as claimed in claim 4, it is characterized in that, when determined this of described CPC sending ending equipment sends time of CPC and frequency resource and be K, described CPC sending ending equipment, by CPC content information after coded modulation framing, is mapped to respectively in a described K time and frequency resource and sends; Wherein, K is positive integer.
6.
method as described in claim 1-5 any one, is characterized in that,
described frequency and time parameter comprise: the duration of the cycle that the available centre frequency that CPC sends and bandwidth, CPC send, CPC transmission and adjacent time and the time migration between frequency resource; Or/and,
described temporal frequency pattern comprises: available centre frequency and bandwidth that the cycle that the lasting time that each CPC sends, each CPC send and each CPC send.
?
7.
a cognitive pilot channel CPC method of reseptance, is characterized in that, comprising:
cPC receiving device obtains for sending frequency and the time parameter of CPC, and determines according to described frequency and time parameter the Candidate Frequency resource that CPC sends;
described CPC receiving device is searched for CPC in described Candidate Frequency resource, and when searching CPC, obtains the time synchronization information of described CPC;
described CPC receiving device, according to described time synchronization information and described frequency and time parameter, is determined the temporal frequency pattern that receives described CPC;
described CPC receiving device receives described CPC according to described temporal frequency pattern.
8.
method as claimed in claim 7, is characterized in that, described CPC receiving device obtains for sending frequency and the time parameter of CPC, is specially:
described CPC receiving device obtain local storage for sending frequency and the time parameter of CPC, described frequency and time parameter are pre-configured, and are stored in CPC receiving device and CPC sending ending equipment; Or,
described CPC receiving device obtain in the control information receiving, carry for sending frequency and the time parameter of CPC, described control information is used to indicate described CPC sending ending equipment and CPC receiving device for sending frequency and the time parameter of CPC.
9.
method as claimed in claim 7, is characterized in that, described CPC receiving device receives described CPC according to described temporal frequency pattern, is specially:
described CPC receiving device determines that according to described temporal frequency pattern this receives time and the frequency resource of CPC, receive CPC, and proportion diversity processing mode obtains this CPC content information in described time and frequency resource.
10.
method as claimed in claim 9, is characterized in that, described frequency diversity processing mode comprises: select merging, high specific to merge or geometric ratio merging.
11.
method as described in claim 7-10 any one, it is characterized in that, described frequency and time parameter comprise: the duration of the cycle that the available centre frequency that CPC sends and bandwidth, CPC send, CPC transmission and adjacent time and the time migration between frequency resource; Or/and,
described temporal frequency pattern comprises: available centre frequency and bandwidth that the cycle that the lasting time that each CPC sends, each CPC send and each CPC send.
?
12.
a cognitive pilot channel CPC sending ending equipment, is characterized in that, comprising:
the first acquisition module, for obtaining for sending frequency and the time parameter of CPC;
the first determination module, for determining according to described frequency and time parameter the temporal frequency pattern that sends CPC;
the second acquisition module, for when described CPC sending ending equipment need to send CPC, obtains the idle frequency spectrum resource information of one's respective area;
the second determination module, for according to described idle frequency spectrum resource information, and described time and frequency pattern, determine that this sends time and the frequency resource of CPC;
sending module, for sending described CPC in definite time of described the second determination module and frequency resource.
13.
equipment as claimed in claim 12, is characterized in that,
described the first acquisition module specifically for, obtain local storage for sending frequency and the time parameter of CPC, described frequency and time parameter are pre-configured, and are stored in CPC sending ending equipment and CPC receiving device; Or,
obtain in the control information receiving, carry for sending frequency and the time parameter of CPC, described control information is used to indicate described CPC sending ending equipment and CPC receiving device for sending frequency and the time parameter of CPC.
14.
equipment as claimed in claim 12, is characterized in that,
described the second determination module specifically for, according to described temporal frequency pattern, determine that this sends candidate's time and the frequency resource of CPC, and will in described candidate time and frequency resource, belong to time and the frequency resource of idle frequency spectrum resource, be defined as frequency and time resource that this sends CPC.
15.
equipment as claimed in claim 12, is characterized in that,
described sending module specifically for, by CPC content information encode, after modulation, framing, proportion diversity mode is mapped in definite time of described the second determination module and frequency resource and sends.
16.
equipment as claimed in claim 15, is characterized in that,
described sending module specifically for, when described the second determination module determines that time that this sends CPC and frequency resource are K, by CPC content information after coded modulation framing, be mapped to respectively in a described K time and frequency resource and send; Wherein, K is positive integer.
17.
equipment as described in claim 12-16 any one, is characterized in that,
described frequency and time parameter comprise: the duration of the cycle that the available centre frequency that CPC sends and bandwidth, CPC send, CPC transmission and adjacent time and the time migration between frequency resource; Or/and,
described temporal frequency pattern comprises: available centre frequency and bandwidth that the cycle that the lasting time that each CPC sends, each CPC send and each CPC send.
18.
a cognitive pilot channel CPC receiving device, is characterized in that, comprising:
the first acquisition module, for obtaining for sending frequency and the time parameter of CPC, and determines according to described frequency and time parameter the Candidate Frequency resource that CPC sends;
the first determination module, for determining according to described frequency and time parameter the Candidate Frequency resource that CPC sends;
search module, for searching for CPC in described Candidate Frequency resource;
the second acquisition module, for when described search module searches CPC, obtains the time synchronization information of described CPC;
the second determination module, for according to described time synchronization information and described frequency and time parameter, determines the temporal frequency pattern that receives described CPC;
receiver module, for receiving described CPC according to described temporal frequency pattern.
19.
equipment as claimed in claim 18, is characterized in that,
described the first acquisition module specifically for, obtain local storage for sending frequency and the time parameter of CPC, described frequency and time parameter are pre-configured, and are stored in CPC receiving device and CPC sending ending equipment; Or,
obtain in the control information receiving, carry for sending frequency and the time parameter of CPC, described control information is used to indicate described CPC sending ending equipment and CPC receiving device for sending frequency and the time parameter of CPC.
20.
equipment as claimed in claim 18, is characterized in that,
described receiver module specifically for, according to described temporal frequency pattern, determine that this receives time and the frequency resource of CPC, receive CPC, and proportion diversity processing mode obtains this CPC content information in described time and frequency resource.
21.
equipment as claimed in claim 20, is characterized in that,
described frequency diversity processing mode comprises: select merging, high specific to merge or geometric ratio merging.
22.
equipment as described in claim 18-21 any one, is characterized in that,
described frequency and time parameter comprise: the duration of the cycle that the available centre frequency that CPC sends and bandwidth, CPC send, CPC transmission and adjacent time and the time migration between frequency resource; Or/and,
described temporal frequency pattern comprises: available centre frequency and bandwidth that the cycle that the lasting time that each CPC sends, each CPC send and each CPC send.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103957606A (en) * | 2014-05-23 | 2014-07-30 | 国网四川省电力公司信息通信公司 | Data transmission method based on electric power telecommunication system |
| WO2023040747A1 (en) * | 2021-09-14 | 2023-03-23 | 维沃移动通信有限公司 | Perception signal transmission processing method and apparatus, electronic device, and readable storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1996784A (en) * | 2006-07-18 | 2007-07-11 | 北京邮电大学 | A method for sensing the pilot frequency, collecting the network information, and broadcasting them to the terminal |
| CN101835169A (en) * | 2010-04-12 | 2010-09-15 | 北京邮电大学 | Method and device for collecting and updating perception pilot frequency channel information |
| WO2011127767A1 (en) * | 2010-04-16 | 2011-10-20 | 华为技术有限公司 | Method and equipment for initializing cognitive system supported by cognitive pilot channel, and system thereof |
| CN102457929A (en) * | 2010-10-15 | 2012-05-16 | 电信科学技术研究院 | Frequency point migration triggering method and equipment, frequency point migration method and system, and equipment |
-
2012
- 2012-09-19 CN CN201210348468.0A patent/CN103686739B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1996784A (en) * | 2006-07-18 | 2007-07-11 | 北京邮电大学 | A method for sensing the pilot frequency, collecting the network information, and broadcasting them to the terminal |
| CN101835169A (en) * | 2010-04-12 | 2010-09-15 | 北京邮电大学 | Method and device for collecting and updating perception pilot frequency channel information |
| WO2011127767A1 (en) * | 2010-04-16 | 2011-10-20 | 华为技术有限公司 | Method and equipment for initializing cognitive system supported by cognitive pilot channel, and system thereof |
| CN102457929A (en) * | 2010-10-15 | 2012-05-16 | 电信科学技术研究院 | Frequency point migration triggering method and equipment, frequency point migration method and system, and equipment |
Non-Patent Citations (2)
| Title |
|---|
| MARKUS MUECK, CHRISTIAN ROM等: "Smart Femto-Cell Controller Based Distributed Cognitive Pilot Channel", 《PROCEEDINGS OF THE 4TH INTERNATIONAL CONFERENCE ON CROWNCOM 2009》, 31 December 2009 (2009-12-31) * |
| NICOLÁS BOLÍVAR AND JOSÉ L. MARZO: "Energy Reduction for Centralized Cognitive Radio Networks with Distributed Cognitive Pilot Channels", 《IEEE》, 31 December 2010 (2010-12-31) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103957606A (en) * | 2014-05-23 | 2014-07-30 | 国网四川省电力公司信息通信公司 | Data transmission method based on electric power telecommunication system |
| WO2023040747A1 (en) * | 2021-09-14 | 2023-03-23 | 维沃移动通信有限公司 | Perception signal transmission processing method and apparatus, electronic device, and readable storage medium |
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| Publication number | Publication date |
|---|---|
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