CN101258686A - Method, equipment and system for supporting measurement of 'fist hearing then talking' recognizing one or more non-occupied RF sub tape - Google Patents
Method, equipment and system for supporting measurement of 'fist hearing then talking' recognizing one or more non-occupied RF sub tape Download PDFInfo
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- CN101258686A CN101258686A CNA2005800515469A CN200580051546A CN101258686A CN 101258686 A CN101258686 A CN 101258686A CN A2005800515469 A CNA2005800515469 A CN A2005800515469A CN 200580051546 A CN200580051546 A CN 200580051546A CN 101258686 A CN101258686 A CN 101258686A
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Abstract
The invention relates to a method of performing a Listen-Before-Talk measurement to enable identifying of one or more unoccupied radio frequency sub-bands applicable for radio frequency identification (RFID) communication operable with a radio frequency identification (RFID) reader subsystem; said method comprising obtaining timing information relating to one or more periods of activity of a wireless communication subsystem; deriving information about one or more periods of non-activity from said timing information; configuring said wireless communication subsystem to perform said Listen-Before-Talk measurement in coordination with said one or more periods of non-activity; and performing said Listen-Before-Talk measurement by the means of the wireless communication subsystem to identify said one or more unoccupied radio frequency sub-bands.
Description
Technical field
The present invention relates to short range communication system.Particularly, the present invention relates to radio-frequency (RF) identification (RFID) communication technology.
Background technology
Radio-frequency (RF) identification (RFID) technology relates generally to local communication technical field, and relates more specifically to comprise the local communication technology of electromagnetism and/or Electrostatic Coupling technology.Use for example radio-frequency (RF) identification (RFID) technology, come in radio frequency (RF) part of electromagnetic spectrum, to realize electromagnetism and/or Electrostatic Coupling, radio-frequency (RF) identification (RFID) reader interface (also abbreviating radio-frequency (RF) identification (RFID) reader as) that it mainly comprises radio-frequency (RF) identification (RFID) transponder (being also referred to as radio-frequency (RF) identification (RFID) mark) and is used for RF transmitter responser.
In the near future, the different radio technology of more and more quantity will be integrated into portable terminal.The scope of the expansion of different application has been ordered about needs and the demand that the radio switch-in method opinion is provided, and described radio switch-in method opinion has different pieces of information speed, scope, robustness respectively and is specially adapted to applied environment and the performance of operating position.As a result, the many wireless scenes problem in the interoperability of how wireless enabled portable terminal will become the challenge in the exploitation.
Radio-frequency (RF) identification (RFID) technology is a kind of technology that occurs recently in terminal is integrated.New use case is supported in radio-frequency (RF) identification (RFID) communication, for example, and equipment pairing, cipher key change or contact the article that are provided with radio-frequency (RF) identification (RFID) mark by the terminal of supporting radio-frequency (RF) identification (RFID) communication and obtain product information.Usually, think that the opereating specification between radio-frequency (RF) identification (RFID) mark and radio-frequency (RF) identification (RFID) reader interface only is several centimetres in the consumer uses.
In fact, issued the product in radio-frequency (RF) identification integrated in mobile phone (FRID) reader.Current realization is based on near-field communication (NFC) technology of 13.56MHz operation.Obtain communication in this technology by induction coupling, and in reader and mark, need bigger coil antenna thus.In addition, induction is coupling in and has restriction when it arrives the wireless connections scope.Usually, at the 13.56MHz place, the maximum magnitude with reasonable exciting current and antenna size is about 1m to 2m.
At the 13.56MHz place, the limited range of radio-frequency (RF) identification (RFID) system has increased makes supply chain management and logic use the interest of competition towards the higher frequency development, and described higher frequency i.e. UHF from 860MHz to 960MHz (very high frequency(VHF)) and the microwave frequency that is in the 2.4GHzISM frequency band.UH frequency (, be about 868MHz, and be 915MHz in the U.S.) in Europe according to Frequency Distribution, in industry and specialty fixed installation can the realization scope on to ten meters, this allows new application fully with respect to 13.56MHz.Operation in the radio-frequency (RF) identification (RFID) at UHF and microwave frequency place is based on backscattering, promptly, radio-frequency (RF) identification (RFID) reader (perhaps interrogator) generates excitation/interrogation signal, and radio-frequency (RF) identification (RFID) answering machine (perhaps radio-frequency (RF) identification (RFID) mark) is adjusted its antenna impedance according to the pattern that specific data rely on.
Current, foremost standardization forum about UHF band is EPCglobal, this forum's guide needle supports the use of radio-frequency (RF) identification (RFID) technology to the industrial drives standard of electronic product code (EPC) in the informative commercial network of current fast development.Short-term goal is to replace the bar code in the tray, and long term object also is to replace the bar code in packing and some independent product.If these targets become a reality, then the user will be only for example be provided with the article of radio-frequency (RF) identification (RFID) transponder of EPCglobal unanimity by contact, with product information or point to more that the directive of details gets access to the terminal that its radio-frequency (RF) identification (RFID) communication is supported.
The exciting power that generates in radio-frequency (RF) identification (RFID) reader subsystem is quite high, and the about 100mW that uses from the consumer who relates to portable terminal is to several watts that use professional fixation application (for example, according to the ETSI rule, maximum 2W).Is the 868MHz ISM band in Europe and the 915MHz band of the U.S. at UHF radio-frequency (RF) identification (RFID) with employed Frequency Distribution.
And the FCC of the U.S. (federal corresponding society) rule request is realized at frequency-hopping spread spectrum (FHSS) scheme of using radio-frequency (RF) identification (RFID) reader and transponder in the frequency range from 902MHz to 928MHz, ETSI (ETSI) rule focuses on from the frequency range of 965MHz to 968MHz and uses radio-frequency (RF) identification (RFID) reader and transponder, and should rule indicate so-called " listem-before-talk (LBT) " scheme, be intended at the different frequency sub-bands of radio-frequency (RF) identification (RFID) communication current occupied still idle (vacant) so that detect.According to the ETSI standard, be right after before each communication of radio-frequency (RF) identification (RFID) reader, radio-frequency (RF) identification (RFID) reader must switch to listen mode and monitor preselected frequency subband in the cycle at specific listening period.The listening period cycle should comprise the Fixed Time Interval of 5ms and from 0ms to r ms time range in random time at interval.If subband is idle (vacant), then random time is set to 0ms.The ETSI standard has further defined the specific minimum enable level that is used for threshold level, and threshold level has defined sensory characteristic.These sensory characteristics are realized with the measurement of power levels of the RF signal of reception by the RF interface logic of radio-frequency (RF) identification (RFID) reader at least, thus satisfied aforementioned requirement according to " listem-before-talk (LBT) " scheme.
It should be appreciated by those skilled in the art that the responsive RF interface of high RF signal needs development effort to the realization and the execution of radio-frequency (RF) identification (RFID) reader, and owing to the requirement to high-quality RF assembly, its cost is very high.
Summary of the invention
The objective of the invention is in order to overcome the above-mentioned inferior position in the prior art state.Especially, the objective of the invention is for the solution based on the economy of assembly of realizing in modern terminal equipment usually and module is provided.
Feature by appended independent claims reaches purpose of the present invention.
According to an aspect of the present invention, a kind of method is provided, its support is carried out listem-before-talk and is measured to allow the one or more unappropriated RF subbands of identification, and this unappropriated RF subband can be applicable to and can communicate by letter by the radio-frequency (RF) identification (RFID) that radio-frequency (RF) identification (RFID) reader subsystem is operated.Obtain the timing information of the one or more cycles of activity that relate to radio communication subsystem.Derive information from the timing information that obtains about one or more non-cycles of activity.The configuration radio communication subsystem with one or more non-cycles of activity the collaborative listem-before-talk of carrying out measure, and carry out listem-before-talk by radio communication subsystem and measure to discern one or more unappropriated RF subbands.
According to another aspect of the present invention, a kind of computer program is provided, it supports listem-before-talk to measure to allow the one or more unappropriated RF subbands of identification, and this unappropriated RF subband can be applicable to and can communicate by letter by the radio-frequency (RF) identification (RFID) that radio-frequency (RF) identification (RFID) reader subsystem is operated.This computer program comprises the program code part, when this program was moved on the terminal of computer, terminal, the network equipment, portable terminal, support mobile communication or application-specific integrated circuit (ASIC), it was used to carry out the step of the method for above-mentioned execution mode according to the present invention.Replacedly, application-specific integrated circuit (ASIC) (ASIC) can be carried out one or more instructions of the above-mentioned steps of the method that is suitable for realizing the above-mentioned execution mode of the present invention,, is equivalent to aforementioned calculation machine program product that is.
According to another aspect of the present invention, a kind of control module is provided, be used to support listem-before-talk to measure to allow the one or more unappropriated RF subbands of identification, this unappropriated RF subband can be applicable to and can communicate by letter by the radio-frequency (RF) identification (RFID) that radio-frequency (RF) identification (RFID) reader subsystem is operated.Can operate this control module to realize control to radio communication subsystem and radio-frequency (RF) identification (RFID) reader subsystem.Dispose the timing information that this control module is used to obtain the one or more cycles of activity that relate to radio communication subsystem.And, dispose this control module deriving information from the timing information that obtains, and arrange that this control module is configuration radio communication subsystem and one or more non-cycle of activity collaboratively to carry out the listem-before-talk measurement about one or more non-cycles of activity.This control module is suitable for indicating radio communication subsystem to carry out the listem-before-talk measurement, thereby discerns one or more unappropriated RF subbands.
According to another aspect of the present invention, a kind of terminal is provided, it supports listem-before-talk to measure to allow the one or more unappropriated RF subbands of identification, and this unappropriated RF subband can be applicable to and can communicate by letter by the radio-frequency (RF) identification (RFID) that radio-frequency (RF) identification (RFID) reader subsystem is operated.This terminal equipment comprises radio communication subsystem and radio-frequency (RF) identification (RFID) reader subsystem at least, and control module is provided, and can operate this control module to realize the control to radio communication subsystem and radio-frequency (RF) identification (RFID) reader subsystem.Dispose the timing information that this control module is used to obtain the one or more cycles of activity that relate to radio communication subsystem, and dispose this control module to derive information from timing information about one or more non-cycles of activity.Arrange that also this control module is with configuration radio communication subsystem and the measurement of one or more non-cycle of activity of collaborative execution listem-before-talk.And this control module is suitable for indicating radio communication subsystem to carry out the listem-before-talk measurement, thereby discerns one or more unappropriated RF subbands.
According to another aspect of the present invention, a kind of system is provided, it supports listem-before-talk to measure to allow the one or more unappropriated RF subbands of identification, and this unappropriated RF subband can be applicable to and can communicate by letter by the radio-frequency (RF) identification (RFID) that radio-frequency (RF) identification (RFID) reader subsystem is operated.This system comprises radio communication subsystem and radio-frequency (RF) identification (RFID) reader subsystem at least.The control module of this system is provided, can operates this control module to realize control to radio communication subsystem and radio-frequency (RF) identification (RFID) reader subsystem.Dispose the timing information that this control module is used to obtain the one or more cycles of activity that relate to radio communication subsystem, and dispose this control module to derive information from timing information about one or more non-cycles of activity.Arrange that also this control module is with configuration radio communication subsystem and the measurement of one or more non-cycle of activity of collaborative execution listem-before-talk.And this control module is suitable for indicating radio communication subsystem to carry out the listem-before-talk measurement, thereby discerns one or more unappropriated RF subbands.
Description of drawings
In order to understand the present invention better, and understand the present invention is become effectively, will only come with reference to the following drawings now in the mode of illustrating, wherein:
Fig. 1 schematically shows the theory diagram of the typical components of describing radio-frequency (RF) identification (RFID) transponder and radio-frequency (RF) identification (RFID) reader subsystem;
Fig. 2 schematically shows the diagram of distributing according to ETSI (ETSI) EN 302308 regular frequency;
Fig. 3 schematically shows the theory diagram according to the portable cellular terminal of support radio-frequency (RF) identification (RFID) communication of an embodiment of the invention;
Fig. 4 schematically show according to the receiver threshold level of ETSI EN 302 308 regular corresponding to Frequency Distribution;
Fig. 5 schematically shows another theory diagram according to the portable cellular terminal of support radio-frequency (RF) identification (RFID) communication of an embodiment of the invention;
Fig. 6 schematically show according to an embodiment of the invention applicable to listem-before-talk (LBT) but mechanism the sequence of operation; And
Fig. 7 schematically shows the frame structure according to GSM (global system for mobile communications) standard.
Embodiment
Run through following description, will indicate assembly identical and/or that be equal to by identical reference number.
Hereinafter, will describe notion of the present invention with reference to the cellular communication subsystem, described cellular subsystems is specifically supported GSM, GSM/GPRS and/or GSM/EDGE, cellular communication.In addition, will support very high frequency(VHF) (UHF) radio-frequency (RF) identification (RFID) communication of EPCglobal standard to describe radio-frequency (RF) identification (RFID) communication with reference to concrete.Should be noted that purpose, provided the above-mentioned standard of cellular communication subsystem and radio-frequency (RF) identification (RFID) reader subsystem in order to illustrate.Should be appreciated that the present invention is not limited thereto.
At first, at electronic article surveillance, merchandise control purpose and be mainly used in the logistics of replacing the bar code identification label and develop and introduced radio-frequency (RF) identification (RFID) technology, described bar code identification label still is used for merchandise control purpose and logistics so far.The typical case that Fig. 1 shows the prior art state of radio-frequency (RF) identification (RFID) transponder realizes.Typical radio-frequency (RF) identification (RFID) transponder module 10 comprises traditionally: electronic circuit, describe as 2 examples of transponder logical one; Data storage capacities, such as transponder memory 13 here description; And radio frequency (RF) interface 11, described radio frequency interface 11 is coupled to transponder logical one 2 with antenna 14.Radio-frequency (RF) identification (RFID) transponder is contained in the small container usually, especially by means of bonding and be mounted on the article that will be labeled.According to the demand of making about the imagination application of radio-frequency (RF) identification (RFID) transponder (promptly, the energy of data transmission rate, inquiry, transmission range etc.), from tens of kHz to hundreds of kHz to the scope of several GHz, the place provides data of different types/message transmission at different radio frequency.
Especially, current following typical frequencies is used for radio-frequency (RF) identification (RFID) technology:
At the low-frequency range that is less than the 135kHz place (typically at about 125kHz);
High-frequency range at about 13.57MHz place;
Very high frequency(VHF) scope (UHF) at 860MHz to 960MHz place; And
Microwave frequency range at 2.54GHz ISM frequency band place.
In the frequency band range of above-mentioned identification, the UHF scope is the operational frequency range that is most interested in.Communication at UHF scope place provides preferably coverage (go up to about 5m or even be 10m) usually and supports higher communication data rate under optimal conditions.Wherein, according to main EPCglobal standard applicatory in the product chain management, can operate by electronic product code (EPC) traditionally in the radio-frequency (RF) identification (RFID) at UHF scope place.The expectation be, with the corresponding to this EPCglobal of radio-frequency (RF) identification (RFID) transponder will be the dominant type of radio-frequency (RF) identification (RFID) transponder in future.To provide hereinafter according to the communication requirement of EPCglobal standard and the main summary of agreement.
Can distinguish radio-frequency (RF) identification (RFID) transponder of two primary categories.Activate and the passive radio frequency identification of powering (RFID) transponder by radio-frequency (RF) identification (RFID) reader, this reader generates excitation or interrogation signal radio frequency (RF) signal of preset frequency (for example).Active radio-frequency (RF) identification (RFID) transponder comprises their its own power source (not shown), such as battery that is used to power or storage battery.
In case activate radio-frequency (RF) identification (RFID) transponder by means of radio-frequency (RF) identification (RFID) reader module 20, the information content that then is stored in the transponder memory 13 is modulated onto radio frequency (RF) signal (promptly, inquiry RF signal) on, wherein this RF signal is launched by the antenna 14 of radio-frequency (RF) identification (RFID) transponder module 10, will be detected and be received by radio-frequency (RF) identification (RFID) reader module 20.More specifically, at passive radio frequency identification (RFID) transponder (promptly, local power supply) in the absence, radio-frequency (RF) identification (RFID) transponder module 10 is powered by time dependent electromagnetic radio frequency (RF) signal/ripple that inquiry radio-frequency (RF) identification (RFID) reader generates traditionally.When radio frequency (RF) by with radio-frequency (RF) identification (RFID) transponder module 10 associated antennas coils the time, stride across the coil formation voltage.This voltage is discerned (RFID) transponder module 10 in order to powered radio-frequency, and supports and will be back to radio-frequency (RF) identification (RFID) reader module 20 from the information of radio-frequency (RF) identification (RFID) transponder module 10, sometimes it is called backscattering.
In the typicalness of prior art, radio-frequency (RF) identification (RFID) transponder is in response to radio-frequency (RF) identification (RFID) standard, such as ISO 14443 type A standards, Mifare standard, near-field communication (NFC) standard and/or EPCglobal standard.
According to the application purpose of radio-frequency (RF) identification (RFID) transponder, canned data or data can be codings hard coded or soft in transponder memory 13.Hard coded mean in transponder memory 13 canned data or data be scheduled to and can not revise.Soft coding means that in transponder memory 13 canned data or data can be disposed by external entity.The configuration of transponder memory 13 can be carried out by radio frequency (RF) signal that is received via antenna 14, perhaps can carry out via the configuration interface (not shown) that allows visit transponder memory 13.
Radio-frequency (RF) identification (RFID) reader module 20 generally includes RF interface 21, reader logic 22 and data-interface 23.Traditionally, data-interface 23 is connected with host computer system (such as portable terminal device), wherein this host computer system on the one hand, by means of coming the operation of radio-frequency (RF) identification (RFID) reader 20 is controlled from the instruction of main frame to 22 transmission of reader logic via data-interface 23, on the other hand, receive the data that provide by reader logic 22 via data-interface 23.In case instruction manipulation, then reader logic 22 startup RF interfaces 21 generate excitation/interrogation signal, so that send via the antenna 24 of the RF interface 21 that is coupled to radio-frequency (RF) identification (RFID) reader module 20.Radio-frequency (RF) identification (RFID) transponder (such as, radio-frequency (RF) identification (RFID) transponder module 10) is under the situation in the coverage of excitation/interrogation signal, radio-frequency (RF) identification (RFID) transponder module 10 is powered, and receives modulated RF signal (backscattering RF signal) from it.Especially, modulated RF signal carries in the transponder memory 13 the data on excitation/inquiry RF signal of being modulated to of storage.Modulated RF signal is coupled in the antenna 24, by 21 demodulation of RF interface, and is supplied to reader logic 22, and reader logic 22 is responsible for obtaining data from the signal of institute's demodulation then.At last, via the data-interface of radio-frequency (RF) identification (RFID) reader module 20, provide from the receive data that modulated RF signal is obtained to the host computer system that is connected to it.
Communication between radio-frequency (RF) identification (RFID) reader and radio-frequency (RF) identification (RFID) transponder, the simple response that can generate by radio-frequency (RF) identification (RFID) transponder in the inquiry of radio-frequency (RF) identification (RFID) reader takes place.In a kind of comparatively complicated mode, communication between radio-frequency (RF) identification (RFID) reader and radio-frequency (RF) identification (RFID) transponder can take place in the mode of grouping, and wherein single packet comprises from the complete order of radio-frequency (RF) identification (RFID) reader and from the complete response of radio-frequency (RF) identification (RFID) transponder.Order and response allow the half-duplex operation between radio-frequency (RF) identification (RFID) reader and radio-frequency (RF) identification (RFID) transponder.
Radio-frequency (RF) identification (RFID) agreement of the radio-frequency (RF) identification that the EPCglobal canonical representation is described in the back (RFID) communication.Schematically, make radio-frequency (RF) identification (RFID) reader send information to one or more radio-frequency (RF) identification (RFID) transponder, this is by using pulse-spacing coding (PIE) form, using double-side band amplitude shift keying (DSB-ASK), monolateral band amplitude shift keying (SSB-ASK) or anti-phase amplitude shift keying (PR-ASK) modulation RF carrier wave (continuous wave (CW); That is, inquiry or excitation RF signal) realize.The RF carrier wave that radio-frequency (RF) identification (RFID) transponder is set to identical modulation from then on receives their operating energy.Radio-frequency (RF) identification (RFID) reader further is configured to by transmitting unmodulated RF carrier wave (continuous wave (CW); Inquiry or excitation RF signal) and intercept backscattering and respond from radio-frequency (RF) identification (RFID) transponder and receive information.Radio-frequency (RF) identification (RFID) transponder comes transmission information by the phase place and/or the amplitude of backscattering-modulation RF carrier wave.The coded format of selecting in response to radio-frequency (RF) identification (RFID) reader command for example is the subcarrier of FM0 or Miller modulation.Communication link between radio-frequency (RF) identification (RFID) reader and radio-frequency (RF) identification (RFID) transponder is semiduplex, this means that in the backscattered while radio-frequency (RF) identification (RFID) transponder will not need the order of demodulation radio-frequency (RF) identification (RFID) reader subsystem.
According to the EPCglobal standard, make radio-frequency (RF) identification (RFID) reader can manage the colony of radio-frequency (RF) identification (RFID) transponder, described three basic processes and then comprise the order that one or more process is specific based on three basic processes.Selection (Select) process is provided, is used for selecting at subsequent communications the colony of radio-frequency (RF) identification (RFID) transponder, this subsequent communications specifically is to make an inventory (Inventory) and visit (Access) procedure command and communicate by letter.Then, can the application choice order to select the special group of radio-frequency (RF) identification (RFID) transponder based on user's certain criteria.It is similar that this operation can be regarded as with selecting one or more record from database.Provide (Inventory) process of making an inventory to be used to discern radio-frequency (RF) identification (RFID) transponder, that is, be used for discerning radio-frequency (RF) identification (RFID) transponder from the colony of selecting by means of select command.Radio-frequency (RF) identification (RFID) reader can begin the cycle of making an inventory (inventory round) (that is, one or more make an inventory order and transponder response cycle) by transmit Query (inquiry) order in of four sessions.One or more radio-frequency (RF) identification (RFID) transponder can be answered (reply).Make radio-frequency (RF) identification (RFID) reader can detect single radio-frequency (RF) identification (RFID) transponder and answer, and from radio-frequency (RF) identification (RFID) transponder that is detected, ask PC (agreement control bit), EPF (electronic product code) and CRC (cyclic redundancy code).Inventory procedure can comprise a plurality of orders of making an inventory.The cycle of making an inventory once operates in a session.Provide access process to be used for communicating, wherein communicate by letter particularly including reading from radio-frequency (RF) identification (RFID) transponder and/or writing to radio-frequency (RF) identification (RFID) transponder with radio-frequency (RF) identification (RFID) transponder.Each radio-frequency (RF) identification (RFID) transponder should be discerned before access process uniquely.Access process can comprise a plurality of visit orders, and wherein some uses based on reader to the covering of transponder communication link of disposal password this (one-time-pad) and encodes.
Carrying out radio frequency under the control of government regulation distributes.Because existing radio frequency distributes, in All Around The World, different allocation standards all is effective.For cell phone, in comprising a plurality of countries of Britain, used the principle about UHF RFID of the U.S. to distribute (from 902MHz to 928MHz), and do not allowed to use radio-frequency (RF) identification (RFID) communication thus at radio-frequency (RF) identification (RFID) communication.Distribute about UHF at radio-frequency (RF) identification (RFID) communication in ITU (International Telecommunications Union) zone 1, distributed frequency range from 865.5MHz to 868.0MHz, wherein ITU zone 1 comprises ETSI (ETSI) country, and these countries comprise Europe whole countries, also comprise the Middle East, Africa and the former Soviet Union.Especially, with reference to European countries, in the said frequencies scope, two ETSI technical standards are correlated with, i.e. EN (european norm) 203 208 and EN 302 200.Wherein, described european norm has defined 15 channels, each from the frequency range of 865.0MHz to 868.0MHz with interior RF bandwidth with 200kHz.
With reference to figure 2, contrast shows different RF channels by its maximum Effective Radiated Power (ERP) level of ETSI technical standard definition.From the frequency range of 865.0MHz to 865.6MHz, stipulated the RF channel of the bandwidth of three 200kHz, the maximum horizontal of its Effective Radiated Power (ERP) is limited to 100mW, from the frequency range of 865.6MHz to 867.6MHz, ten RF channels have been stipulated with the bandwidth of 200kHz, the maximum horizontal of its Effective Radiated Power (ERP) is limited to 2W, and from the frequency range of 867.6MHz to 868.0MHz, stipulated the RF channel of the bandwidth of two 200kHz, the maximum horizontal of its Effective Radiated Power (ERP) is limited to 500mW.
Above-mentioned ETSI technical standard wherein also comprises the rule about duty factor and connection management.For example, radio-frequency (RF) identification (RFID) reader restricts and does not have at any frequency of 500mW channel or channel hopping with at " listem-before-talk " of 2W channel (LBT) scheme in 10% duty factor.
For the reason of integrality, should be noted that at the UHF radio-frequency (RF) identification (RFID) in ITU zone 2 (east, the Pacific Ocean of North America and South America and international date line) and communicate by letter, distribute frequency range from 902MHz to 928MHz.The maximum horizontal of effective isotropic radiated power (EIFP) is limited to 5W, has the frequency hopping (FH) of permission.Details are with reference to FCC (Federal Communications Committee) 15.247.About ITU zone 3 (western part, Pacific Rim of Asia, Australia and international date line), the distribution at the 950MHz place is available.
About Fig. 3, the minimum at the threshold value of the receiver of radio-frequency (RF) identification (RFID) reader that shows when carrying out above-mentioned " listem-before-talk " scheme allows power level.Following table has been summarized described level equally:
Effective Radiated Power threshold level (ERP) in transmission
0mW to 100mW≤-83dBm
101mW to 500mW≤-90dBm
501mW to 2W≤-96dBm
Any RF signal that surpasses one of above-mentioned threshold level (that is, according to transmitting power) that the receiver of radio-frequency (RF) identification (RFID) reader detects indicates any other equipment (such as another RFID reader) to take the RF subband (bandwidth 200kHz) that detects the RF signal thereon.In such a case, radio-frequency (RF) identification (RFID) reader should not be launched and other RF subbands that should monitor in the RF frequency band of permission detect the RF subband that the RF signal that wherein receives is lower than the respective threshold level up to it.Alternatively, radio-frequency (RF) identification (RFID) reader remains on the same sub-band, and postpones transmission, till definite subband is idle (vacant).
Particularly about the transmitting power on the 500mW, the sensitivity of the receiver of radio-frequency (RF) identification (RFID) reader require (that is ,≤-96dBm) very high basically.This means that radio-frequency (RF) identification (RFID) reader, the particularly realization of its RF interface are very complicated, and the cost height, especially for realizing the required assembly of RF interface circuit.
With reference to figure 4 and Fig. 5, with the realization details of describing according to the subscriber terminal equipment of embodiment of the present invention.
Fig. 4 shows the schematic block diagram of assembly of subscriber terminal equipment of the exemplary form of the terminal 100 of supporting portable cellular communication.Terminal equipment 100 is exemplarily represented the processing terminal or the equipment of any kind that can use with the present invention.Should be appreciated that the present invention neither is restricted to processing terminal or the equipment that the terminal equipment 100 that illustrates is not restricted to any other particular type yet.
As mentioned above, the terminal equipment 100 that illustrates exemplarily is embodied as the portable user terminal of the supporting cellular communication with radio-frequency (RF) identification (RFID) communication capacity.Especially, terminal equipment 100 is embodied as based on processor or based on the system of microcontroller, this system comprises respectively: CPU (CPU) and mobile processing unit (MPU) 110; Data and application memory 120; Cellular device, this cellular device comprise cellular radio interface (I/F) 180 and the subscriber identification module (SIM) 185 with corresponding adaptive RF antenna (181); The user interface input/output device, this user interface input/output device typically comprises audio frequency I/O (I/O) device 140 (being microphone and loud speaker traditionally), key, keypad and/or the display 150 that has the keyboard 130 of key input controller (Ctrl) and have display controller (Ctrl), and (this locality) wireless and/or cable data interface (I/F) 160.
The operation of terminal equipment 100 should be used for controlling based on operating system or basic controlling by CPU (CPU)/mobile processing unit (MPU) 110 usually, and this operating system or basic controlling are used and be used for controlling them by function, feature and functional the making that terminal equipment 100 is provided to its user.Display and display controller (Ctrl) 150 is usually by processing unit (CPU/MPU) 110 controls, and provide information to the user, this information is particularly including (figure) user interface (UI), and this user interface allows the user to use function, the feature and functional of terminal equipment 100.Provide keypad and keypad controller (Ctrl) 130 to support user's input information.Information via keypad input offers processing unit (CPU/MPU) 110 by keypad controller (Ctrl) usually, and this processing unit can be indicated and/or controls according to input information.Audio frequency I/O (I/O) device 140 comprises at least and is used to the microphone that reappears the loud speaker of audio signal and be used for recorde audio signal.Processing unit (CPU/MPU) 110 can the control audio data to the conversion of audio output signal, and audio input signal is to the conversion of voice data, wherein for example voice data has and is used to the suitable format transmitting and store.Digital audio to the conversion of the audio signal of audio signal and inverse process usually by digital-to-analogue and modulus circuit support, the circuit of realizing based on digital signal processor (DSP, not shown) for example.
Can comprise for example character keys and phone-specific key by the keypad of user's operation for input, all keypads of ITU-T as everyone knows, one or more soft keys with context-specific input function, scroll key (on/following and/or a right side/left side and/or its any combination) be used at the display moving cursor or by user interface (UI) browsing, the four directions is to button, to button, joystick is or/and the similar control device from all directions.
Comprise according to the terminal equipment 100 of the specific implementations shown in Fig. 4 and to be coupled to radio-frequency antenna (181) and can be with the cellular communication subsystem 180 of subscriber identification module (SIM) 185 operations.Cellular communication subsystem 180 also can be designed as honeycomb (communication) interface (I/F).Cellular communication subsystem 180 is set to cellular transceiver to be reduced to base band frequency from cellular antenna received signal, decoded signal, the described signal of demodulation and with them.Cellular communication subsystem 180 provides air interface, and its corresponding base station (BS) of serving with the Radio Access Network (RAN) of public land mobile network (PLMN) in conjunction with subscriber identification module (SIM) 185 communicates.Therefore, the output of cellular communication subsystem 180 comprises the data flow that can need processing unit (CPU/MPU) 110 further to handle.The cellular communication subsystem 180 that is configured to cellular transceiver also is suitable for receiving data from processing unit (CPU/MPU) 110, and these data are will be via the data of air interface transmission to the base station (BS) of Radio Access Network (RAN) (not shown).Therefore, 180 pairs of cellular communication subsystems comprise the data of signal to be encoded, modulates, and it is up-converted into radio frequency, and it will be used for aerial transmission.Then, the antenna of terminal equipment 100 (shown in the profile) is with the corresponding base station (BS) of gained emission of radio frequency signals to the Radio Access Network (RAN) of public land mobile network (PLMN).Cellular communication subsystem 180 is preferably supported the 2nd algebraically word cellular network, and such as GSM (global system for mobile communications), it can support GPRS (GPRS) and/or EDGE (the GSM data evolution of enhancing; 2.5 generation), the 3rd algebraically word cellular network, such as any CDMA (code division multiple access) system, this system is particularly including UMTS (Universal Mobile Telecommunications System) and the cdma2000 of also being appointed as WCDM (Wideband Code Division Multiple Access (WCDMA)) system, and/or any similarly, relevant or be used for standard in cellular future (3.9 generations, the 4th generation).
According to different cellular standards, for cellular communication has distributed various frequency bands.Following table has been listed the selection of institute's service band; This table does not have exhaustive all selections.In order to quote the back, expression is used for the abbreviation of the common acceptance of different frequency bands.
System design up link RF frequency band [MHz] down link RF frequency band [MHz]
GSM 900 (Europe): 890-915 935-960
GSM 1800 (Europe): 1710-1785 1805-1880
GSM 850 (U.S.): 824-849 869-894
GSM 1900 (U.S.): 1850-1910 1930-1990
Cdma2000 (U.S.): 1850-1910 1930-1990
WCDMA 2100 (Europe): 1920-1980 2110-2170
Should be appreciated that cellular communication subsystem 180 can supporting cellular communication on a plurality of different frequency bands.For example, cellular communication subsystem 180 supporting cellular communication on frequency band GSM 850, GSM 900, GSM 1800 and/or GSM 1900.And cellular communication subsystem 180 can supporting cellular communication on a plurality of different agreements.For example, cellular communication subsystem 180 according to GSM standard and UMTS standard or GSM standard and cdma2000 standard or its any other make up supporting cellular to communicate by letter.The cellular communication subsystem 180 of supporting cellular communication on a plurality of different frequency bands also should be appointed as multi-band cellular communication subsystem 180, and the cellular communication subsystem 180 of supporting cellular communication also should be appointed as multi-mode cellular communication subsystem 180 on a plurality of different agreements.Notice that cellular communication subsystem 180 can be multiband and multi-mode cellular communication subsystem 180.
Exemplarily describe wireless and/or cable data interface (I/F) 160, and be construed as it and represent one or more data-interfaces, provide described interface outside the above-mentioned cellular communication subsystem 180 that can in exemplary terminal equipment 100, realize.Nowadays, a large amount of wireless communication standards are available.For example, terminal equipment 100 can comprise the one or more wave points according to following standard operation: any IEEE 802.xx standard, Wi-Fi standard, WiMAX standard, any bluetooth standard (1.0,1.1,1.2,2.0+EDR, LE), ZigBee (being used for wireless personal domain network (WPAN)), infrared data insert (IRDA), Wireless USB (USB) and/or any other current available standard and/or any following RFDC standard, such as UWB (ultra broadband).
And data-interface (I/F) 160 also is construed as the one or more data-interfaces of expression, and this data-interface especially is included in the cable data interface of realizing in the exemplary terminal equipment 100.Such wireline interface can be supported the network based on cable, such as ethernet lan (local area network (LAN)), PSTN (PSTN), DSL (digital subscriber line) and/or other available and following standards.Data-interface (I/F) 160 can also be represented any data-interface, comprises any dedicated serial/parallel interface, USB (USB) interface, Firewire interface (according to standards such as any IEEE 1394/1394a/1394b), comprises the compatible bus of ATAPI (advanced technology attachment packet interface), the memory bus interface of MMC (multimedia card (MultiMediaCard)) interface, SD (secure data (SecureData)) card, flash memory card interface etc.
Assembly shown in Figure 4 and module can be integrated in the terminal equipment 100 as separate, independently module, or its any combination.What preferably, one or more assemblies of terminal equipment 100 and module can be with the integrated formation SOC (system on a chip) of processing unit (CPU/MPU) (SoC).This type of SOC (system on a chip) (SoC) preferably is integrated into all component of computer system in the single chip.SoC can comprise numeral, simulation, mixed signal, and often comprises radio-frequency enabled.Typical application is in embedded system and the portable system, especially it is compressed at the restriction of size and energy consumption.This type of typical SoC comprises the integrated circuit of a plurality of execution different tasks.These circuit can comprise one or more assemblies, these assemblies comprise microprocessor (CPU/MPU), memory (RAM: random access memory, ROM: read-only memory), one or more UART (universal asynchronous receiver-reflector), one or more serial/network ports, DMA (direct memory access (DMA)) controller chip, GPU (Graphics Processing Unit), DSP (digital signal processor) etc.Up-to-date improvement has allowed the growth of VLSI (ultra-large integrated) integrated circuit complexity in the semiconductor technology, and all component of system is integrated in the single chip becomes possibility.
Can use contact management's application, calendar application, multimedia player application, the WEB/WAP browse application that is included under the basic application of supporting data and/or function of voice communication with the typical case of terminal equipment 100 operations and/or support for example message delivery applications of Short Message Service (SMS), Multimedia Message service (MMS) and/or E-mail service.Modern portable electronic terminal is programmable; That is, this terminal has realized DLL (dynamic link library) and execution level, and it makes Any user or programmer create and to install can be with the application of terminal equipment 100 operations.Nowadays, the programming language of the perfect equipment that is independent of is JAVA, and it can be used for being fit to the function of mobile device and the particular version of requirement, is appointed as JAVA MicroEdition (ME).In order to support that terminal equipment 100 has been realized JAVA MIDP (mobile information apparatus profile) based on the execution of the application program of JAVA ME establishment, it has defined the interface between JAVA ME application program (being also referred to as JAVA MIDlet) and the terminal equipment 100.JAVA MIDP (mobile information apparatus profile) provides configuration to be used to carry out the virtual JAVA engine of JAVA MIDlet to execution environment.Yet, should be appreciated that, the invention is not restricted to JAVA ME programming language and JAVA MIDlet; Other programming languages, particularly special program language can be applicable to the present invention.
With reference to figure 5, the terminal equipment 100 of realizing some different radio frequency communication interfaces has been described schematically.At description, provided how wireless realization shown in Figure 5.Present invention should not be construed as and be limited to the specific implementations shown in Fig. 5.The how wireless realization of terminal equipment 100 comprises cellular communication subsystem 180, radio-frequency (RF) identification (RFID) reader subsystem 190, blue tooth interface (I/F) 161 and WLAN (WLAN (wireless local area network)) communication interface (I/F) 162.
With reference to figure 5, communication controler (μ C) 200 is responsible for the controlled function and the task of cellular communication subsystem 180.Provide application controller (μ C) 210 carrying out the control to the function and the task of other communication interfaces, these other communication interfaces comprise that radio-frequency (RF) identification (RFID) reader subsystem 190, bluetooth connect 161 and WLAN interface 162.Application controller (μ C) 210 and then be connected to communication controler (μ C) 200, it comprises many wireless controllers (MRC) 205 in addition, these many wireless controllers can be in the communication controler (μ C) 200 logic entity with the scheduling and control different communication interfaces.Many wireless controllers (MRC) 205 preferably be responsible for to handle many radio operations, domain scheduling when providing, the wireless system state information that frequency domain dispatching is provided and keeps each the independent communication interface in many wireless terminal devices 100.Many wireless controllers (MRC) 205 provide one or more senior many wireless entity, and these entities have in the different communication interface control and carry out and measure and support ability for management time domain scheduling feature desired control.Therefore, in listem-before-talk (LBT) scheme according to embodiment of the present invention, many wireless controllers (MRC) 205 can be measured the UHF channel of UHF radio-frequency (RF) identification (RFID) allocation of communications of being carried out for the RF front end interface by the cellular communication subsystem by ETSI.Then, this measurement result is offered application (μ C) 210, it further controls the operation of radio-frequency (RF) identification (RFID) reader subsystem according to this measurement result.
Basic conception of the present invention is the LBT scheme that realization has superiority.To the RF subband whether occupied (by any other RF equipment) still empty user's input that the initial inspection of (vacant) can key in based on the user of terminal equipment 100 and start.For example, the user preferably imports the operation that radio-frequency (RF) identification (RFID) reader subsystem is asked in indication via the user interface 30 of terminal equipment 100 by the user.Alternatively, initial inspection can begin from can receive enabling signal the application 35 that terminal equipment 100 is carried out the time.
With reference to figure 6, schematically show the sequence of operation that can be applicable to listem-before-talk (LBT) scheme according to the embodiment of the present invention.
In operation S100, check and whether ask the RF signal is carried out subband scanning.For example, if when carrying out signalisation by the user via user interface (30) input of terminal equipment 100 or by the application 35 that can carry out on terminal equipment 100, indication checks that then the sequence of operation advances to operation S110.Otherwise the monitoring cyclic process shown in Fig. 6 remains on operation S100.
Whether decision starts and carries out listem-before-talk and measure in operation S100, that this operation S100 can comprise needs and/or merge to further decision in the sequence of operation effectively.
As mentioned above, distribute about Frequency Distribution, frequency subband and/or the subband definition, about measuring the threshold of sensitivity value defined that sensitivity requires and/or depending on that official's rule of the threshold of sensitivity value defined of target transmit power is diverse in the world.Usually, worldwide the manufacturer of the product of sell them must consider official's rule that all these are different when development.The ground that more has superiority, product development can be realized multi-functionally meeting numerous officials rule as much as possible with the product of guaranteeing them.
In this case, can determine terminal equipment 100 current of living in and operated geographic areas.This geographic area generally includes the region (for example, wherein joint rule is observed by community, such as European Union) of national territory, national community, and/or any other a plurality of countries (such as the definition in ITU zone).Preferably, official's rule that observe according to all terminal equipments this geographic area is divided, and terminal equipment is arranged in this geographic area.Based on the geographic area of determining, can check further whether the listem-before-talk measurement needs to operate radio-frequency (RF) identification (RFID) reader subsystem.If it is not that official requires that this listem-before-talk is measured, then the sequence of operation for example turns back to S100 to support reexamining the terminal equipment current location.Otherwise the sequence of operation continues.Even be noted that it is not that official requires that listem-before-talk is measured, can carry out that listem-before-talk is measured but nonrecognition is unappropriated and/or the subband that takies.
And on the basis of the geographic area of determining, official's rule is known; For example, can provide a plurality of different officials rule it is selected according to the geographic area of determining.Then, can carry out listem-before-talk according to official's rule and measure, it especially comprises one or more Frequency Distribution, one or more radio frequency subband definition and/or one or more threshold of sensitivity value defined.
Especially, select to measure one or more radio frequency subbands of checking based on official's rule by listem-before-talk.
More particularly, obtain information respectively about radio-frequency (RF) identification (RFID) reader subsystem 190 and terminal equipment 100 positions.Location dependent information can comprise the information about operator and/or sub-district.Can obtain information from radio communication subsystem about operator and/or sub-district.Especially, can comprise Operator ID about the information of operator, it has identified the operator of the current customized cordless communication network of radio communication subsystem; For example, operation mark symbol can be the Operator ID etc. of the operator of the Operator ID of operator of sign public land mobile network (PLMN) or cellular network or sign (public/privately owned) wireless lan (wlan), Wi-Fi network, WiMAX network.Information about operator can comprise realm identifier, its sign for example wherein operator zone, geographic area, urban area or the region of its communication service are provided.
Information about the sub-district can comprise cell identifier, its identifying cells, and cordless communication network is current to be operated in the overlay area of this sub-district.This sub-district can be the sub-district of public land mobile network (PLMN) or cellular network, and the sub-district of (public/privately owned) wireless lan (wlan), Wi-Fi network, WiMAX network etc.
Information about the sub-district can comprise positional information or realm identifier.This positional information can the indicating cell center, the geographical position of the antenna tower of sub-district, and/or the position of cell base station (BS, Node B).Realm identifier for example can identify zone, geographic area, urban area or the region that operator wherein provides its communication service.
Position-based relevant information and look-up table can obtain the current location of radio-frequency (RF) identification (RFID) reader subsystem 190 and terminal equipment 100 respectively.Be noted that rough position resolution can accept to support the selection of the official's rule that must be noted that.
And, can determine current location equally based on the positional information of obtaining from navigation system or position/location service.This type of positional information can be obtained from the Galileo system that satellite-based navigation system (such as GPS (global positioning system)) maybe will be used.Also can for example obtain positional information by wireless communication system based on signal delay measurement, triangulation etc.Especially, the cellular communication subsystem is supported this type of position/location service.
In addition, can obtain or estimate will be by the transmitted power level of radio-frequency (RF) identification (RFID) the reader subsystem use that is used for radio-frequency (RF) identification (RFID) communication.And, can define (maximum) transmitted power level that will use.As mentioned above, may need to consider official's rule.Especially, the maximum transmit power level that will use can be official's regulation.According to the transmitted power level that will use, whether need can consider listem-before-talk to measure (according to official's rule).Power level threshold can be provided, and if the transmitted power level that will use surpassed power level threshold then carry out listem-before-talk and measure.Power level threshold depends on the performance of the transmitted power level that will use, radio-frequency (RF) identification (RFID) reader subsystem, one or more the pre-seting and/or official's rule that can obtain from radio-frequency (RF) identification (RFID) reader subsystem.Power level threshold can depend on listem-before-talk ability and/or the maximum transmit power level that can operate with radio-frequency (RF) identification (RFID) reader subsystem.Can pre-set the attribute that can comprise radio-frequency (RF) identification (RFID) reader subsystem from what radio-frequency (RF) identification (RFID) reader subsystem was obtained.Depend on that the capacity of radio-frequency (RF) identification (RFID) reader subsystem and/or the power level threshold that pre-sets can guarantee that the standard operation listem-before-talk that is provided with according to radio-frequency (RF) identification (RFID) reader subsystem measures.
In operation S110, check cellular communication subsystem 180 current whether be movable.Because the time requirement (5ms at least) of listem-before-talk (LBT) process is so can preferably carry out the RF signal measurement when cellular communication subsystem 180 is in clear operation state or dormant operation state.For example, during the activity operations state, in time frame, can there be non-cycle of activity such as the tdma system of GSM.One or more time slots (each has the time span of about 0.577ms) that can comprise each time frame these non-cycles of activity.For example, if give downlink communication for uplink communication and another time slot allocation a time slot allocation, then maximum non-cycle of activity (8-2) * 0.577ms ≈ 3.5ms may be available.And, be noted that unappropriated time slot needn't be in time continuously and in minizone and/or the sub-district measuring operation can distribute to one or more other time slots.
Be noted that term clear operation state, dormant operation state and activity operations state representation current operation status about the operability of cellular communication subsystem 180.Especially, the free time/the dormant operation state specified the mode of operation of cellular communication subsystem 180, and wherein this operation of cellular communication subsystem is limited to paging and measuring operation.In the activity operations state, the wireless access network (RAN) by cellular communication subsystem 180 and public land mobile network (PLMN) carries out data and/or voice communication, and the cellular communication subsystem is subscribed to this public land mobile network (PLMN).
The sequence of operation that is described below with reference to figure 6 can realize by communication controler 200 that comprises many wireless controllers 205 and application controller 210.And expression is monitored the sequence of operation support " listem-before-talk " of round-robin algorithm and is measured, and if desired, can realize follow-up radio-frequency (RF) identification (RFID) communication based on software section and/or nextport hardware component NextPort.And one or more software sections can be with processing unit (110) operation of terminal equipment 100.
According to operation S110, if cellular communication subsystem 180 current be in the free time/the dormant operation state, then the sequence of operation advances to operation S120; Otherwise this sequence of operation turn back to operation S110 be used to wait for cellular communication subsystem 180 the free time/the dormant operation state.
In operation S120, obtain system information from cellular communication subsystem 180.Wherein, this system information mainly comprises the paging relevant information and measures relevant information.
In the clear operation state, under dormant operation, do not exist any terminal of the wireless access network (RAN) that will be transmitted into public land mobile network (PLMN) to initiate data and/or voice communication, cellular communication subsystem 180 current these public land mobile networks (PLMN) that are subscribed to.Dormant operation comprises guarantees that cellular communication subsystem 180 can receive terminal termination data and/or the voice communication that is transmitted into the cellular communication subsystem 180 of terminal equipment 100 by wireless access network (RAN).As mentioned above, dispose cellular communication subsystem 180 usually can receive the beep-page message that comes from wireless access network (RAN), it is launched into the communication link of cellular communication subsystem 180 with indication request data and/or voice communication.And it is signal quality measured with the RF that execution relates to sub-district internal power level, neighbor cell (minizone) power level and/or other system availability to dispose cellular communication subsystem 180 usually.Based on these measurements, receive the wireless access network (RAN) of measuring agreement from cellular communication subsystem 180 and can guarantee that cellular communication subsystem 180 is in the PLMN cell coverage area, thereby cellular communication subsystem 180 and wireless access network (RAN) always can start communication respectively.And, can allow the cellular communication subsystem 180 of terminal equipment 100 to launch random accessing message when needed at any time.
Below, the operation of cellular communication subsystem 180 schematically is discussed in more detail with reference to GSM standard.
The control of public land mobile network (PLMN) and managerial demand relative signal notice.GSM standard has defined some control channels (CCH) providing continuous, packet-based signaling service by air interface for the cellular terminal that comprises the cellular communication subsystem, thereby receives message and to the RAN message transfer from RAN at any time.Common Control Channel (CCCH) as the part of above-mentioned control channel (CCH) comprises paging channel (PCH), and this paging channel (PCH) is the part of the down link of Common Control Channel (CCCH).Need paging channel (PCH) to come the cellular terminal of beep-page message with location such as terminal equipment 100.In a single day each cellular terminal is registered to wireless access network (RAN), then it is assigned to paging group (CCCH_GROUP), and it can comprise some cellular terminals.Paging group (CCCH_GROUP) is assigned to a specific Common Control Channel (CCCH) in a plurality of Common Control Channel (CCCH).When the Common Control Channel of distributing to specific paging group (CCCH_GROUP) (CCCH) went up the transmission beep-page message, the cellular terminal that belongs to this paging group (CCCH_GROUP) was decoded to this beep-page message, and it comprises the cellular terminal identifier.The cellular terminal of the sign that this beep-page message is addressed to is gone up request control channel (CCH) in Random Access Channel (RACH).
With reference to figure 7, schematically show typical frame structure according to GSM standard.Logic channel comprises two parts to the mapping of physical channel: frequency domain and time domain mapping.This means that logic channel is based on tdma frame structure and frequency to the mapping of physical channel, it is distributed to cellular terminal and (moves and distribute; MA) and the base station (cell allocation of RAN; CA), cellular terminal is currently connected to this base station.
In time domain, in the complex frames structure of above-mentioned TDMA method configuration, organize logic channel.This frame structure comprises so-called Hyperframe, superframe and multiframe.According to the tissue of control channel, interested especially in multiframe structure.Multiframe structure has defined the mapping of logical sub-channel to physical channel.Exist and to comprise 26 frames and be appointed as the first kind multiframe (not shown among Fig. 7) of 26-frame multiframe and comprise 51 frames and be appointed as the second class multiframe of 26-frame multiframe.26-frame multiframe is organized in (not shown among Fig. 7) in the superframe that comprises 51 26-frame multiframes, and 51-frame multiframe is organized in the superframe that comprises 26 51-frame multiframes.Each Hyperframe comprises 2048 superframes.
The second class multiframe (being 51-frame multiframe) is correlated with in view of the operation of the cellular communication subsystem in the clear operation state, particularly paging scheme.
With reference to above-mentioned paging scheme, the B parameter S_CC_CHANS among the BCCH (Broadcast Control Channel) has defined the quantity of the basic physical channel of support Common Control Channel (CCCH).Time slot on the specific radio frequency channel of all Common Control Channel (CCCH) use cell allocation (CA).The CCCH_GROUP identifier of its of the cellular communication subsystem (or cellular terminal) in each Common Control Channel (CCCH) carrying clear operation state oneself.The cellular communication subsystem listening paging message that belongs to specific CCCH_GROUP, and if desired, it only inserts on the specific Common Control Channel (CCCH) under the CCCH_GROUP at random.As give a definition and move the method be used for determining CCCH_GROUP under it:
CCCH_GROUP(0...BS_CC_CHANS-1)＝
((IMSI mod 1000) mod (BS_CC_CHANS*N)) div N; And wherein N goes up the quantity of " available " paging block in a Common Control Channel (CCCH); (that is, N multiply by BS_PA_MFRMS in the quantity that a Common Control Channel (CCCH) goes up " available " paging block in the 51-multiframe); IMSI is the international mobile subscriber identity; " mod " defined the mould calculating operation; And " div " defined the division of integer calculating operation.
B parameter S_PA_MFRMS on the BCCH (Broadcast Control Channel) has indicated the quantity of the 51-multiframe between the transmission of the cellular terminal (or cellular communication subsystem) of beep-page message in the clear operation state of identical paging group.So, the every 51-multiframe of the paging block of each CCCH " available " on this CCCH (being determined by above-mentioned two parameters) those " available " multiply each other with BS_PA_MFRMS.General each N piece that only needs their paging channel of mobile monitoring, wherein N equals the quantity of whole " available " piece (definite by above-mentioned BCCH parameter) on the paging channel (PCH) of specific CCCH, and their CCCH_GROUP is required supervision.B parameter S_PA_MFRMS also is appointed as the paging repetition period (PRP).
This means that B parameter S_PA_MFRMS indication beep-page message is to the quantity of the 51-multiframe between the transmission of the cellular terminal of identical paging group.B parameter S_PA_MFRMS comprises 3 bits and can have value in from 2 to 9 scopes.
Be noted that other page-modes (for example, paging identification or paging overload condition) can require cellular terminal and detect paging more continually certainly than the normal page-mode of describing in detail above.All cellular terminals of monitoring specific paging block are defined as being arranged in identical PAGING_GROUP.Specific move is used for determining which specific PAGING_GROUP it belongs to and determine that therefore in the available block on the paging channel which specific is defined as follows detected method:
PAGING_GROUP(0...N-1)＝
((IMSI?mod?1000)mod(BS_CC_CHANS*N))mod?N。
Be noted that to allow every BS_PA_MFRMS 51-multiframe of RAN (wireless access network) on the paging subchannel of the cellular terminal that is used to provide, to send transmission,, then allow every 1/N if perhaps support discontinuous reception (DRX) cycle to cut apart
DRXIndividual 51-multiframe must send transmission, wherein N
DRXIt is the par of the piece that per 51 multiframes monitor in discontinuous reception (DRX) pattern according to its paging group.When the cellular communication subsystem of cellular terminal or terminal need attempt sending its paging subchannel at every turn transmission is decoded.
Generally speaking, when not considering BS_PA_MFRMS parameter or paging repetition period (PRP), the free time/the dormant operation state during, in scope, change based on duration of the cellular communication subsystem right and wrong activity of GSM from about 460ms to 2.1s.As mentioned above, permission BS_PA_MFRMS parameter or paging repetition period (PRP) have the value in the scope 2 to 9.BS_PA_MFRMS unit or paging repetition period (PRP) unit are corresponding to the duration of 51-multiframe (i.e. 51 frames), and it approximately is 4.615ms.
Wireless access network (RAN) and its base station (BTS) are provided with BS_PA_MFRMS parameter or paging repetition period (PRP) respectively.Usually, BS_PA_MFRMS parameter between 6 to 9 or the value of paging repetition period (PRP) are according to wireless access network (RAN) and network requirement definition.Thereby, if the duration of about 4.615ms of typical B S_PA_MFRMS parameter or paging repetition period (PRP) value (from 6 to 9) and 51-multiframe, then non-cycle of activity the scope from 27.69ms to 41.535ms be available in principle.
Should be noted that the measuring operation of not considering this cellular communication subsystem.Can hang up in this type of sub-district and the minizone measurement.When considering this situation, must suppose that the cellular communication subsystem does not change its position, do not limit at RAN under the situation of availability of cellular communication subsystem, the minizone measurement can be ignored at least.
As mentioned above, according to the RF signal measurement of LBT (" listem-before-talk ") the scheme time cycle in need be from minimum 5ms to maximum 10ms time range.When the RF signal measurement that repeats according to LBT (" listem-before-talk ") scheme, the time cycle of requirement can last till tens of milliseconds.And when ignoring listem-before-talk (LBT) operation in Time Calculation, reading radio-frequency (RF) identification (RFID) transponder (promptly in single scan operation) can need about 10ms usually.
Can carry out based on the communication between communication controler 200 and the cellular communication subsystem 180 and obtain system information from cellular communication subsystem 180.Above-mentioned communication can comprise one or more control commands and response.
In operation S130, determine available non-cycle of activity according to the timing information that the cellular communication subsystem obtains from wireless access network (RAN).As mentioned above, describe the timing requirement of cellular communication subsystem in detail.Regularly require (particularly requiring) according to these, can obtain and can determine non-cycle of activity about the timing of cellular communication subsystem paging.
In operation S140, check whether the non-cycle of activity of determining according to system information is enough for carrying out LBT (" listem-before-talk ") operation in operation S130.And, it is also conceivable that during checking whether the non-cycle of activity determined according to system information is enough for carrying out LBT (" listem-before-talk ") operation and follow-up radio-frequency (RF) identification (RFID) traffic operation in operation S130.
During the non-cycle of activity of cellular communication subsystem, carry out radio-frequency (RF) identification (RFID) communication and have superiority, because may cause interference in the frequency band that uses during data in cellular communication subsystem activity operations state and/or the voice communication.Because the high power levels of using in radio-frequency (RF) identification (RFID) communication (up to maximum 2W), this type of interference can cause the decline of the RF signal quality in the cellular communication, it causes the error probability of cellular communication to increase at least, in the worst situation, it causes the dropped communication link between RAN and the cellular communication subsystem.
If the inspection in operation S140 is successful, then the sequence of operation advances to operation S150.Otherwise the sequence of operation turns back to operation S110 or operation S120, thereby obtains system information once more and determine non-cycle of activity.
In operation S150, the communication controler 200 of configurating terminal device 100 is to begin to carry out listem-before-talk (LBT) measuring operation.According to the embodiment of the present invention, communication controler 200 comprises many wireless controllers (MRC) 205 and application controller 210, and this communication controler 200 is suitable for disposing cellular communication subsystem 180 and is used for listem-before-talk (LBT) measuring operation.In order to support to carry out listem-before-talk (LBT) measuring operation, communication controler 200 is synchronous with the non-cycle of activity of cellular communication subsystem 180.Select enough carry out the cycle of listem-before-talk (LBT) measuring operation non-cycle of activity, if and wish, selecting it enough to carry out the follow-up radio-frequency (RF) identification (RFID) that one or more radio-frequency (RF) identification (RFID) transponder in the coverage with radio-frequency (RF) identification (RFID) reader subsystem carries out communicates by letter, according to this non-cycle of activity, realize carrying out the RF signal measurement at least one subband that will in radio-frequency (RF) identification (RFID) communication, use for communication controler 200 these cellular communication subsystems of configuration of cellular communication subsystem controls.In addition, it is wide that the cellular communication subsystem is adjusted to the subband of 200kHz, and the grade of sensitivity of this cellular communication subsystem is suitable for being applied to the grade of sensitivity requirement that listem-before-talk (LBT) is measured.The power level that this sensitivity requirement depends on radio-frequency (RF) identification (RFID) subband and will use in radio-frequency (RF) identification (RFID) communication.Can carry out based on the communication between communication controler and the cellular communication subsystem by the configuration that communication controler 200 carries out cellular communication subsystem 180.Above-mentioned communication can comprise one or more control commands and response.
For example, the cellular communication subsystem can be a multi-band cellular communication subsystem 180, and this cellular communication subsystem 180 is supported GSM 850, GSM 900 and GSM 1800.Consistent with the UHF frequency band of distributing to radio-frequency (RF) identification (RFID) communication, the transceiver part of the GSM 850 of cellular communication subsystem 180 can dispose and be used for listem-before-talk (LBT) measurement.The operation radio frequency band of the transceiver part of this GSM 850 approaches the radio frequency band of UHF radio-frequency (RF) identification (RFID) communication basically.
Should be noted that, can on a subband that can be applicable to radio-frequency (RF) identification (RFID) communication, carry out listem-before-talk (LBT) measuring operation, perhaps on the one or more subbands that can be applicable to radio-frequency (RF) identification (RFID) communication, carry out listem-before-talk (LBT) measuring operation.In the latter case, can have superiority, thereby in which subband and a plurality of subband which supports to detect has taken and has been cleared in listem-before-talk (LBT) measuring operation that can be applicable on some subbands of radio-frequency (RF) identification (RFID) communication.
In operation S160, and in order to activate listem-before-talk (LBT) measuring operation selected definite non-cycle of activity cellular communication subsystem 180 synchronously, preferably under the control of communication controler 200, carry out this operation.
In operation S170, the cellular communication subsystem 180 of listem-before-talk (LBT) measuring operation that configuration is carried out in order to executive communication controller 200 with respective bandwidth (that is, 200kHz) and corresponding grade of sensitivity measure one or more RF signal levels on radio-frequency (RF) identification (RFID) subband of one or more orders.According to the requirement of above-mentioned listem-before-talk (LBT) scheme, listem-before-talk (LBT) measuring operation is carried out 5ms or 5ms+r (wherein r is to the random value between the 5ms between 0ms) at least.
The RF receiver front end that should be noted that the typical GSM cellular communication subsystem of subsystem 180 has and is low to moderate-threshold of sensitivity of 114dBm (ERP) and the channel accuracy of 200kHz.As a result, cellular communication subsystem 180 can be applicable to listem-before-talk (LBT) measuring operation, because the threshold of sensitivity is better than about the desired threshold value of Frequency Distribution rule in radio-frequency (RF) identification (RFID) communication.
And the RF receiver front end of cellular communication subsystem 180 has surpassed the sensitivity requirement that the Frequency Distribution rule measured about listem-before-talk (LBT) is applied.In order to reduce the energy consumption of cellular communication subsystem 180 during listem-before-talk (LBT) measuring operation, the front-end noise coefficient of cellular communication subsystem 180 can relax predefined value (depending on that LBT measures the threshold of sensitivity that allows).For example, the front-end noise coefficient of cellular communication subsystem 180 can relax 15dB.
For controlling links, cellular communication subsystem 180 generally includes the wireless subsystem controlling links entity of function, and it is mainly used at the sub-district part, switches the RF signal quality on preparation and the power control measurement downlink channel.This RF signal measurement is called quality monitoring traditionally.
Particularly cellular communication subsystem 180 the free time/stand-by (standby) mode of operation during, monitor the carrier wave of BCCH (Broadcast Control Channel).The base station of each sub-district (BTS) emission bcch carrier.This cellular communication subsystem monitors the bcch carrier of current area (current this sub-district that is assigned to) and the bcch carrier of neighbor cell.Based on the quality monitoring of this bcch carrier, cellular communication subsystem 180 can guarantee to select this sub-district at every turn, and cellular communication subsystem 180 can communicate reliably with maximum probability and its.Usually based on two parametric description channel qualities, with dB the received signal intensity (RELEV) of unit and based on the received signal quality (RXQUAL) of error rate measurement.
It should be appreciated by those skilled in the art that signal strength signal intensity (RELEV) measurement that can adopt reception is to support listem-before-talk (LBT) measurement.During listem-before-talk (LBT) is measured, measure inquiry RF signal (excitation RF signal, continuous wave) whether occurs.Radio-frequency (RF) identification (RFID) reader emission inquiry RF signal is used to activate and/or interior one or more radio-frequency (RF) identification (RFID) transponder of its coverage of switching on.Have a RF signal with the signal strength signal intensity that surpasses regular assign thresholds if the signal strength signal intensity (RELEV) that receives is measured to cause detecting, it is occupied that then hypothesis has detected the subband of RF signal thereon.Vice versa, has a RF signal with the signal strength signal intensity that is lower than regular assign thresholds if the signal strength signal intensity (RELEV) that receives is measured to cause detecting, and then to have detected the subband of RF signal thereon be that empty or unoccupied to hypothesis.
In operation S180,, check whether the one or more subbands through measuring that can be applicable to radio-frequency (RF) identification (RFID) communication are that empty or unappropriated according to the measurement result of from cellular communication subsystem 180, obtaining.If all subbands of having measured are occupied, then should the duplicate measurements operation and the sequence of operation turn back to operation S190, operation S140 or operation S110
In operation S190, check that whether should carry out listem-before-talk (LBT) on one or more other subbands that can be applicable to radio-frequency (RF) identification (RFID) communication measures.Correspondingly, in operation S200, can select one or more other subbands to be used for listem-before-talk (LBT) and measure, the sequence of operation proceeds to operation S140 or operation S110 then.
In operation S210, according to listem-before-talk (LBT) measurement result configuration radio-frequency (RF) identification (RFID) reader subsystem 190.This means that preferably configuration communication controller 200 is to operate on the subband that can be applicable to radio-frequency (RF) identification (RFID) communication by application controller 210, this subband has been identified during listem-before-talk (LBT) is measured will empty (vacant).In addition, communication controler 200 can trigger radio-frequency (RF) identification (RFID) reader subsystem 190 to operate follow-up radio-frequency (RF) identification (RFID) communication.The communication of this follow-up radio-frequency (RF) identification (RFID) preferably with collaborative execution one or more non-time calibration cycle of activity of cellular communication subsystem 180.The operation of the time calibration of radio-frequency (RF) identification (RFID) reader subsystem 190 is for preventing that any interference between the RF signal communication from having superiority, and this RF signal communication takes place owing to the operation of cellular communication subsystem 180 and the operation of radio-frequency (RF) identification (RFID) reader subsystem 190.In follow-up radio-frequency (RF) identification (RFID) communication period, radio-frequency (RF) identification (RFID) reader subsystem 190 at least transmitting RF interrogation signal (pumping signal, continuous wave) with energising and/or activate one or more radio-frequency (RF) identification (RFID) transponder be positioned at radio-frequency (RF) identification (RFID) reader subsystem 190 overlay areas.
Generally speaking, those skilled in the art should be appreciated that from top description based on unrestricted execution mode, basic conception of the present invention provides listem-before-talk (LBT) scheme, it is carried out by means of RF interface front end of cellular communication subsystem because rule and the signal strength measurement that needs at radio-frequency (RF) identification (RFID) signal post, and this cellular communication subsystem has been realized the high sensitive receiver assembly usually.The requirement of the RF interface front end of realization radio-frequency (RF) identification (RFID) reader subsystem has been eliminated in the use that is used for the cellular communication subsystem that listem-before-talk (LBT) measures, and this RF interface front end meets the sensitivity demand of rule about the comparable harshness set up at the Frequency Distribution of UHF radio-frequency (RF) identification (RFID) communication.It is unwanted that this type of harsh sensitivity demand is communicated by letter with the UHF radio-frequency (RF) identification (RFID) between radio-frequency (RF) identification (RFID) transponder for radio-frequency (RF) identification (RFID) reader subsystem.Therefore, this inventive concepts allows to provide realization for the economy of radio-frequency (RF) identification (RFID) reader subsystem with the terminal equipment that can carry out cellular communication.
Central communications controller has been realized the control to cellular communication subsystem and radio-frequency (RF) identification (RFID) reader subsystem, and its appearance is favourable for the configuration of supporting two subsystems that execution aforementioned listem-before-talk (LBT) method of measurement is required.Especially, central communications controller can be operated two subsystems eliminating or to minimize at least the probability that disturbs between the RF signal communication with cooperative mode, and the generation of this RF signal communication is respectively in response to the operation of cellular communication subsystem and radio-frequency (RF) identification (RFID) reader subsystem.
Should be noted that although realized basic conception according to UHF radio-frequency (RF) identification (RFID) communication technology, this basic conception is not limited thereto.According to the exploitation in future, the radio-frequency (RF) identification in the 2.4GHzISM frequency band (RFID) communication will become important.Those skilled in the art should be appreciated that based on the top description about embodiment of the present invention, same WLAN and/or have the listem-before-talk (LBT) that the Bluetooth communication subsystem (particularly RF interface front end receiver) of high sensitivity transceiver can be applicable on the key concept meaning of the present invention and measure.
It will be apparent to those skilled in the art that along with technological progress inventive concept can realize in a plurality of modes.Therefore, the present invention and execution mode thereof are not limited to above-mentioned execution mode, and can change in the scope of claims.
Claims (51)
1. a method is used to carry out listem-before-talk and measures to support the one or more unappropriated radio frequency subbands of identification, and described unappropriated radio frequency subband can be applicable to and can communicate by letter by the radio-frequency (RF) identification (RFID) that radio-frequency (RF) identification (RFID) reader subsystem is operated; Described method comprises:
-obtain the timing information of the one or more cycles of activity that relate to radio communication subsystem;
-from the information of described timing information derivation about one or more non-cycles of activity;
The described radio communication subsystem of-configuration is to measure with the described listem-before-talk of described one or more non-cycles of activity of collaborative execution; And
-carry out described listem-before-talk by described radio communication subsystem to measure, to discern described one or more unappropriated radio frequency subband.
2. method according to claim 1 comprises:
One or more radiofrequency signal power levels on the described one or more radio frequency subbands of-measurement; And
-determine according to one or more thresholds of sensitivity whether described one or more radio frequency subband is occupied.
3. method according to claim 1 and 2 wherein defines the described threshold of sensitivity according to described radio frequency subband.
4. according to any described method in the aforementioned claim, comprising:
-dispose described radio-frequency (RF) identification (RFID) reader subsystem according to the result of described listem-before-talk measurement, carry out radio-frequency (RF) identification (RFID) communication in the described unappropriated radio frequency subband to be supported in.
5. according to any described method in the aforementioned claim, comprising:
-according to radio-frequency (RF) identification (RFID) rule of communication, dispose described one or more thresholds of sensitivity of described radio communication subsystem at the requirement of the threshold of sensitivity.
6. according to any described method in the aforementioned claim, the described timing information that wherein relates to one or more cycles of activity comprises the timing information that relates to the time cycle and/or the time interval, wherein, in the described time cycle, described radio communication subsystem is launched one or more radiofrequency signals, and, support described radio communication subsystem to receive one or more radiofrequency signals in the described time interval.
7. according to any described method in the aforementioned claim, the described timing information that wherein relates to one or more cycles of activity comprises the timing information that relates to paging cycle, at described paging cycle, supports to receive one or more beep-page messages.
8. according to any described method in the aforementioned claim, comprising:
-determine that the mode of operation of described radio communication subsystem, wherein said mode of operation comprise clear operation state and activity operations state at least; And
-under the situation of described clear operation state, support to carry out described listem-before-talk and measure.
9. according to any described method in the aforementioned claim, comprising:
-determine in the current geographic area that whether is positioned at official's rule that the listem-before-talk that suits the requirements measures of described radio-frequency (RF) identification (RFID) reader subsystem; And
-to carry out described listem-before-talk according to described official rule to measure, wherein said official rule comprises at least one that is selected from the group that comprises one or more radio frequency subband definition and one or more thresholds of sensitivity.
10. method according to claim 9 comprises:
-select one or more radio frequency subbands according to described official rule.
11., comprising according to claim 9 or 10 described methods:
-obtaining the information of the position that relates to described radio-frequency (RF) identification (RFID) reader subsystem, wherein said location dependent information comprises the information about operator and/or sub-district, especially operator and/or cell identifier; And
-determine described position based on described location dependent information and/or look-up table.
12., comprising according to claim 9 or 10 described methods:
-determine described position based on the positional information of obtaining from navigation system.
13. any described method according in the aforementioned claim comprises:
-obtain and will be used for the transmitted power level that radio-frequency (RF) identification (RFID) is communicated by letter by described radio-frequency (RF) identification (RFID) reader subsystem; And
If-the described transmitted power level that will use has surpassed power level threshold, then carry out described listem-before-talk and measure.
14. method according to claim 13 comprises:
-according to being selected from the ability that comprises the described transmitted power level that will use, described radio-frequency (RF) identification (RFID) reader subsystem, at least one item in the default of described radio-frequency (RF) identification (RFID) reader subsystem and/or the group that official is regular being defined described power level threshold.
15. according to any described method in the aforementioned claim, wherein said radio communication subsystem is at least one in cellular communication subsystem and the wireless communication subsystem.
16. method according to claim 15, wherein said radio communication subsystem are based on the cellular communication subsystem, bluetooth subsystem of GSM or based in the subsystem of IEEE 802.xx at least one.
17., wherein support described cellular communication subsystem to meet the operation of GSM 850 according to claim 15 or 16 described methods.
18. according to any described method in the aforementioned claim, wherein said radio frequency subband is arranged in SHF band, specifically is the frequency range that is positioned at from 860MHz to 960MHz.
19. according to any described method in the aforementioned claim, wherein the Frequency Distribution of communicating by letter for super high frequency radio frequency identification (RFID) according to ETSI defines described SHF band.
20. computer program, described computer program comprises the program code part that is stored on the machine readable media, when described program product moved on the terminal based on equipment, terminal equipment, the network equipment, portable terminal, consumer-elcetronics devices or the support of wireless communication of processor, described program code partly was used for enforcement of rights and requires any one described operation of 1 to 19.
21. control module, described control module is used to support listem-before-talk to measure to allow the one or more unappropriated radio frequency subbands of identification, and described unappropriated radio frequency subband can be applicable to and can communicate by letter by the radio-frequency (RF) identification (RFID) that radio-frequency (RF) identification (RFID) reader subsystem is operated; Wherein can operate described control module to realize control to radio communication subsystem and described radio-frequency (RF) identification (RFID) reader subsystem;
The timing information that described control module is used to obtain the one or more cycles of activity that relate to described radio communication subsystem wherein is set;
Wherein dispose described control module to derive information from described timing information about one or more non-cycles of activity;
Described control module wherein is set is used to dispose described radio communication subsystem and the described listem-before-talk measurement of described one or more non-cycle of activity of collaborative execution; And
Described control module wherein is set is used to indicate described radio communication subsystem to carry out described listem-before-talk measurement, thereby discern described one or more unappropriated radio frequency subband.
22. control module according to claim 21 wherein is provided with described control module and is used for obtaining one or more radiofrequency signal power levels on described one or more radio frequency subband in response to described measurement;
Whether and it is occupied to determine described one or more radio frequency subband according to one or more thresholds of sensitivity wherein to dispose described control module.
23., wherein define the described threshold of sensitivity according to described radio frequency subband according to claim 21 or 22 described control modules.
24., described control module wherein is set is used for disposing described radio-frequency (RF) identification (RFID) reader subsystem and carries out radio-frequency (RF) identification (RFID) communication to be supported on of described unappropriated radio frequency subband according to the result that described listem-before-talk is measured according to any described control module in the claim 21 to 23.
25. according to any described control module in the claim 21 to 24, described control module wherein is set to be used for disposing described one or more thresholds of sensitivity of described radio communication subsystem at the requirement of the threshold of sensitivity according to radio-frequency (RF) identification (RFID) rule of communication.
26. according to any described control module in the claim 21 to 25, the described timing information that wherein relates to one or more cycles of activity comprises the timing information that relates to the time cycle and/or the time interval, wherein, in the described time cycle, described radio communication subsystem is launched one or more radiofrequency signals, and, support described radio communication subsystem to receive one or more radiofrequency signals in the described time interval.
27. according to any described control module in the claim 21 to 26, the described timing information that wherein relates to one or more cycles of activity comprises the timing information that relates to paging cycle, at described paging cycle, supports to receive one or more beep-page messages.
28. according to any described control module in the claim 21 to 27, the mode of operation that described control module is used for determining described radio communication subsystem is set wherein, wherein said mode of operation comprises clear operation state and activity operations state at least; And wherein, described control module is set is used under the situation of clear operation state, support to carry out described listem-before-talk and measure.
29., described control module wherein is set is used for determining in the current geographic area that whether is positioned at official's rule that the listem-before-talk that suits the requirements measures of described radio-frequency (RF) identification (RFID) reader subsystem according to any described control module in the aforementioned claim; Described control module wherein further is set is used for allowing described listem-before-talk to measure according to described official rule, wherein said official rule comprises at least one that is selected from the group that comprises one or more radio frequency subband definition and one or more thresholds of sensitivity.
30. control module according to claim 29 wherein is provided with described control module and is used for selecting one or more radio frequency subbands according to described official rule.
31. according to claim 29 or 30 described control modules, wherein dispose described control module to obtain the information of the position that relates to described radio-frequency (RF) identification (RFID) reader subsystem, wherein said location dependent information comprises the information about operator and/or sub-district, especially operator and/or cell identifier wherein are provided with described control module and are used for determining described position based on described location dependent information and/or look-up table.
32., described control module wherein is set is used for determining described position based on the positional information of obtaining from navigation system according to claim 29 or 30 described control modules.
33., wherein dispose described control module to obtain the transmitted power level that will be used for radio-frequency (RF) identification (RFID) communication by described radio-frequency (RF) identification (RFID) reader subsystem according to any described control module in the aforementioned claim; Surpass power level threshold if the described transmitted power level that described control module is used for using wherein is set, then supported described listem-before-talk to measure.
34. control module according to claim 33 wherein disposes described control module with according to being selected from the ability that comprises the described transmitted power level that will use, described radio-frequency (RF) identification (RFID) reader subsystem, at least one item in the default of described radio-frequency (RF) identification (RFID) reader subsystem and/or the group that official is regular being defined described power level threshold.
35. according to any described control module in the claim 21 to 34, wherein said radio communication subsystem is at least one in cellular communication subsystem and the wireless communication subsystem.
36. control module according to claim 35, wherein said radio communication subsystem are based on the cellular communication subsystem, bluetooth subsystem of GSM or based in the subsystem of IEEE 802.xx at least one.
37., wherein support described cellular communication subsystem to meet the operation of GSM (global system for mobile communications) and especially meet the operation of GSM 850 according to claim 29 or 36 described control modules.
38. according to any described control module in the claim 21 to 37, wherein said radio frequency subband is arranged in SHF band, specifically is the frequency range that is positioned at from 860MHz to 960MHz.
39. according to any described control module in the claim 21 to 38, wherein the Frequency Distribution of communicating by letter for SHF band place radio-frequency (RF) identification (RFID) according to ETSI (ETSI) defines described SHF band.
40. terminal equipment, supporting described terminal equipment to be used for listem-before-talk measures to allow the one or more unappropriated radio frequency subbands of identification, described unappropriated radio frequency subband can be applicable to and can communicate by letter by the radio-frequency (RF) identification (RFID) that radio-frequency (RF) identification (RFID) reader subsystem is operated, described terminal equipment comprises radio communication subsystem and described radio-frequency (RF) identification (RFID) reader subsystem at least, and the control module that wherein can operate described terminal equipment is to realize the control to radio communication subsystem and described radio-frequency (RF) identification (RFID) reader subsystem;
The timing information that described control module is used to obtain the one or more cycles of activity that relate to described radio communication subsystem wherein is set;
Wherein dispose described control module to derive information from described timing information about one or more non-cycles of activity;
Described control module wherein is set is used to dispose described radio communication subsystem and the described listem-before-talk measurement of described one or more non-cycle of activity of collaborative execution; And
Described control module wherein is set is used to indicate described radio communication subsystem to carry out described listem-before-talk measurement, thereby discern described one or more unappropriated radio frequency subband.
41. according to the described terminal equipment of claim 40, wherein said control module is according to any described control module in the claim 21 to 39.
42. according to claim 40 or 41 described terminal equipments, wherein said radio communication subsystem is cellular communication subsystem, bluetooth subsystem or based in the subsystem of IEEE 802.xx at least one.
43. according to the described terminal equipment of claim 42, wherein support described cellular communication subsystem to be used for communication at least, be particularly useful for comprising at least the communication based on multiband GSM (global system for mobile communications) of the operation that meets GSM 850 based on GSM (global system for mobile communications).
44. according to any described terminal equipment in the claim 40 to 43, wherein said radio frequency subband is arranged in SHF band, specifically is the frequency range that is positioned at from 860MHz to 960MHz.
45. according to any described terminal equipment in the claim 40 to 44, wherein the Frequency Distribution of communicating by letter for the radio-frequency (RF) identification (RFID) at UHF band place according to ETSI (ETSI) defines described SHF band.
46. system, described system is used to support listem-before-talk to measure to allow the one or more unappropriated radio frequency subbands of identification, described unappropriated radio frequency subband can be applicable to and can communicate by letter by the radio-frequency (RF) identification (RFID) that radio-frequency (RF) identification (RFID) reader subsystem is operated, described system comprises radio communication subsystem and described radio-frequency (RF) identification (RFID) reader subsystem at least, and the control module that wherein can operate described system is to realize the control to radio communication subsystem and described radio-frequency (RF) identification (RFID) reader subsystem;
The timing information that described control module is used to obtain the one or more cycles of activity that relate to described radio communication subsystem wherein is set;
Wherein dispose described control module to derive information from described timing information about one or more non-cycles of activity;
Described control module wherein is set is used to dispose described radio communication subsystem and the described listem-before-talk measurement of described one or more non-cycle of activity of collaborative execution; And
Described control module wherein is set is used to indicate described radio communication subsystem to carry out described listem-before-talk measurement, thereby discern described one or more unappropriated radio frequency subband.
47. according to the described system of claim 46, wherein said control module is according to any described control module in the claim 21 to 39.
48. according to claim 46 or 47 described systems, wherein said radio communication subsystem is cellular communication subsystem, bluetooth subsystem or based in the subsystem of IEEE 802.xx at least one.
49. according to the described system of claim 48, wherein support described cellular communication subsystem to be used for communication at least at least, be particularly useful for comprising at least the communication based on multiband GSM (global system for mobile communications) of the operation that meets GSM 850 based on GSM (global system for mobile communications).
50. according to any described system in the claim 46 to 49, wherein said radio frequency subband is arranged in SHF band, specifically is the frequency range that is positioned at from 860MHz to 960MHz.
51. according to any described terminal equipment in the claim 46 to 50, wherein the Frequency Distribution of communicating by letter for the radio-frequency (RF) identification (RFID) at UHF band place according to ETSI (ETSI) defines described SHF band.
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| CNA2005800515469A CN101258686A (en) | 2005-11-24 | 2005-11-24 | Method, equipment and system for supporting measurement of 'fist hearing then talking' recognizing one or more non-occupied RF sub tape |
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| CN110945925A (en) * | 2017-07-25 | 2020-03-31 | 高通股份有限公司 | Shared spectrum synchronization design |
| CN110945925B (en) * | 2017-07-25 | 2022-03-22 | 高通股份有限公司 | Shared spectrum synchronization design |
| CN112753265A (en) * | 2018-09-27 | 2021-05-04 | 康维达无线有限责任公司 | Sub-band operation in unlicensed spectrum of new radio |
| CN113295203A (en) * | 2021-05-11 | 2021-08-24 | 内蒙古显鸿科技股份有限公司 | Passive wireless high-speed rail track board real-time online monitoring system device |
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