CN1820426A - Radio communication apparatus and interference avoiding method - Google Patents
Radio communication apparatus and interference avoiding method Download PDFInfo
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- CN1820426A CN1820426A CNA2004800197781A CN200480019778A CN1820426A CN 1820426 A CN1820426 A CN 1820426A CN A2004800197781 A CNA2004800197781 A CN A2004800197781A CN 200480019778 A CN200480019778 A CN 200480019778A CN 1820426 A CN1820426 A CN 1820426A
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Abstract
The invention provides a frequency hopping method for switching a hopping carrier frequency in a predetermined hopping pattern based on a hopping carrier table, intermittent receiving components for starting carrier frequency designating components every constant cycle are provided therein to give a command for receiving the control channels of opposed radio base stations. In the case which a hopping order in the hopping carrier table is skipped by n to carry out switching every intermittent receiving cycle in an intermittent receiving operation, the intermittent receiving cycle is set in such a manner that n and a total number m of hopping carrier frequencies in the hopping carrier table have an optimum relationship with each other.
Description
Technical field
The present invention relates to a kind of radio communication device and interference avoidance method that uses frequency-hopping method, described frequency-hopping method is used for switching the frequency-hopping carrier frequency that will use according to predetermined frequency-hopping mode.
Background technology
In the last few years, have the ISM frequency band of 2.4GHz frequency band (being used for industry, science and medical treatment), and using the various devices that comprise microwave oven, and described frequency band is easy to cause the problem of the radio wave interference between device.For this reason.The parts of avoiding radio wave interference by following manner have been used: use with the spread spectrum techniques (FHSS) of bluetooth as the spread spectrum techniques and the utilization of the direct method of diffusion of representative as the frequency-hopping method of representative by utilizing to use with WLAN.
And various devices use the ISM frequency band with 2.4GHz frequency band, are easy to produce in described frequency band disturb.Use the spread spectrum techniques of frequency-hopping method for disturbing, relatively to have resistivity.And under will the situation of executive communication in the ISM frequency band, frequency-hopping method is jumped in its particular carrier wave frequency in constant circulation (cycle), if an interference source is with the frequency long period continuously execution generation overlapping with certain carrier frequency (hereinafter referred to as carrier frequency), then this causes receiving interference.
For example,, proposed a kind of AFH method, be used to change frequency-hopping mode to avoid interference as described in the JP-A-7-107010.
Below with reference to Figure 14 specific operation is described.Figure 14 shows the figure of the structure of the traditional adaptive wireless communicator that uses frequency-hopping method.
Conventional wireless communications devices shown in Figure 14 has crack (frequency slot) switching part 104 frequently, is used for switching crack (carrier frequency) frequently in regular turn according to frequency-hopping mode.In frequency crack switching part 104, observe the accepting state that parts 110 are observed the frequency crack that is used as frequency-hopping mode.Receive to be the transmission of the state that disturbs the time when observing parts 110, hopping pattern change parts 111 are deleted described frequency crack (carrier frequency) from frequency-hopping mode table 113, and add standby not use carrier wave (standby carrier wave) to the frequency-hopping mode table, and utilization sends free time to sending the content that data transfer path 105 outputs are changed, so that transmit identical content to communication parter.Therefore, reciprocally revised the frequency-hopping mode that will be used to communicate by letter, realized thus avoiding interference.
But, comprise according to predetermined frequency-hopping mode with the method for carrier frequency frequency hopping, the change frequency-hopping mode described in the patent document 1 with the method that avoids interference in, such problem is arranged: after beginning to communicate by letter, need the specific time to change to best frequency-hopping mode, and may cause interference at that time durations up to having carried out.
(the present invention promptly avoids interference)
But, changed wireless environment in communication period.For this reason, some carrier frequencies can be in the be interfered interference of electric wave of that time durations.If once as standby carrier wave and the disturbed carrier frequency of removing from frequency-hopping mode keeps not being used, then when exchange during from the carrier wave of when beginning communication and standby carrier wave identical quantity on sum, available standby carrier wave is eliminated, and therefore can not exchange carrier.Therefore, be difficult to keep communication quality.
(the present invention recovers standby carrier wave)
Summary of the invention
In order to solve traditional problem, the purpose of this invention is to provide a kind of FHSS communicator, it can keep communication quality corresponding to the various changes in wireless environment.
According to the radio communication device of use frequency-hopping method of the present invention be used for before the communication beginning in the frequency hopping of carrying out according to predetermined frequency-hopping mode for each frame, carry out and intermittently receive operation, receive operation described intermittence and be used for improving off and on and being received in the control information that each constant frame circulation (cycle) transmits from the wireless base station by control channel, described radio communication device and be used in communication beginning back by voice channel and execution information transmits, the carrier frequency that will have interference simultaneously in time replaces with standby carrier frequency, to avoid interference corresponding to the degree of the interference of frequency-hopping carrier frequency, described radio communication device and comprising: the frequency-hopping carrier table is used to describe frequency-hopping mode; Frequency-hopping carrier frequency specified parts is used for the order that partly is provided for switching the frequency-hopping carrier frequency to controlled in wireless; And, receiving-member intermittently, be used for carrying out intermittently receiving operation, and described radio communication device has to make and is used to carry out the related structure that a plurality of circulations (cycle) frame of intermittently receiving and the sum in the frequency-hopping carrier frequency described in the frequency-hopping carrier table have the best each other.
And, in according to FHSS communicator of the present invention, with respect to the carrier frequency of when receiving the interference of disturbing electric wave, deleting from frequency-hopping mode, than other standby carrier waves commutative condition is set more strictly, and, will be set to be lower than each of described other standby carrier waves in this priority that is added to described frequency-hopping mode.Therefore, confirm fully can executive communication after, the described carrier frequency that circulates again is with commutative.
Description of drawings
Fig. 1 shows the figure according to the structure of radio communication device first example of the present invention, that use frequency-hopping method,
Fig. 2 is the key diagram that the notion of frequency-hopping method is shown,
Fig. 3 is the key diagram that the frequency-hopping carrier table that will use in first example of the present invention is shown,
Fig. 4 (a) is illustrated in first example of the present invention the key diagram of the relation between the index of the frequency-hopping carrier table that intermittently receives circulation (cycle) numbering, the frame number that will receive and will receive in the following cases: intermittently receiving circulates is set to 7, and the quantity of the frequency-hopping carrier frequency that will use is set to 15
Fig. 4 (b) is illustrated in first example of the present invention the key diagram of the relation between the index of the frequency-hopping carrier table that intermittently receives numbering cycle, the frame number that will receive and will receive in the following cases: intermittently receiving circulates is set to 16, and the quantity of the frequency-hopping carrier frequency that will use is set to 15.
Fig. 4 (c) is illustrated in first example of the present invention the key diagram of the relation between the index of the frequency-hopping carrier table that intermittently receives numbering cycle, the frame number that will receive and will receive in the following cases: intermittently receiving circulates is set to 64, and the quantity of the frequency-hopping carrier frequency that will use is set to 15
Fig. 4 (d) is illustrated in first example of the present invention the key diagram of the relation between the index of the frequency-hopping carrier table that intermittently receives numbering cycle, the frame number that will receive and will receive in the following cases: intermittently receiving circulates is set to 15, and the quantity of the frequency-hopping carrier frequency that will use is set to 16
Fig. 5 is the key diagram that receives circulation intermittence that illustrates in the following cases: intermittently receiving circulates is set to 7, and the quantity of the frequency-hopping carrier frequency that will use is set to 15,
Fig. 6 is illustrated in the key diagram of super (super) frame in the DECT method and the key diagram of the relation of the type that the data that send from the wireless base station for each frame index in superframe are shown,
Fig. 7 is the figure that illustrates according to the structure of the FHSS communicator of second example of the present invention,
Fig. 8 illustrates the flow chart of handling according to the reception in standby carrier wave of second example,
Fig. 9 is the standby carrier list when voice begin according to second example,
Figure 10 is the frequency-hopping mode table when voice begin according to second example,
Figure 11 is according to the standby carrier list before and after the carrier frequency exchange of second example and the transition diagram of frequency-hopping mode table,
Figure 12 is the flow chart that illustrates according to the processing in the exchange of carrier frequency of second example,
Figure 13 is the figure that illustrates according to the structure of the FHSS communicator of the example of claim 2 of the present invention,
Figure 14 is the figure that the structure of traditional frequency hopping communicating device is shown.
Embodiment
Below, specify radio communication device with reference to accompanying drawing according to the use frequency-hopping method of first example of the present invention.
(first example)
Fig. 1 shows the figure according to the structure of radio communication device first example of the present invention, that use frequency-hopping method.In Fig. 1, the wireless base station as the communication parter (partner) of the radio communication device of frequency-hopping method according to described example is used in 1 expression, 2-10 represents to use the functional block according to the radio communication control section of the radio communication device of the frequency-hopping method of described example, 2 expression controlled in wireless parts, 3 expressions are receiving-member intermittently, 4 expression frequency-hopping carrier frequency specified parts, 5 expression frequency-hopping carrier tables, the standby carrier wave meter of 6 expressions, 7 expressions are disturbed and are observed parts, 8 expression interfering carriers are identification component in advance, and 9 expression frequency-hopping carriers are replaced parts, the carrier wave notice parts that 10 expressions are replaced.
Fig. 2 is the key diagram that illustrates according to the notion of the frequency-hopping method of first example, Fig. 3 is the key diagram that the example of the frequency-hopping carrier table that will use in described example is shown, Fig. 4 is illustrated under the situation of the sum of specifying the frequency-hopping carrier frequency that intermittently receives circulation and will use in the described example key diagram of the relation between the index of the frequency-hopping carrier table that intermittently receives numbering cycle, the frame number that will receive and will receive.
At first, with reference to Fig. 2 notion according to the operation of the frequency-hopping method of first example is described.Be structured in the communication between wireless base station and the wireless terminal in the following manner: will the scheduled time be divided into frame, and will further be divided into a plurality of time slots (slot) with the execution time division multiplexing, and the two-way information up and down of can in described same frame, communicating by letter in the time in the described frame.In communication, use under the situation of each time slot, in described frame up and down to time slot in use same frequency, and switching frequency in next frame time (frequency hopping) is to avoid by the fixing air interference that causes of disturbing.The transfer sequence of frequency (sequence) is scheduled between wireless base station and wireless terminal, and is provided as the frequency-hopping carrier table together with a plurality of patterns that have different skews in same sequence.Therefore, can guarantee continuously to communicate by letter synchronously.And, existing therein under the situation of a plurality of identical systems, a plurality of frequency-hopping modes that have different skews in same time slot can coexist.Therefore, can avoid owing to disturb the sequence conflict cause, and can improve power system capacity.
Then, operation according to the radio communication device of the use frequency-hopping method of described example will be described according to the operating concept of frequency-hopping method.In Fig. 1, wireless base station 1 uses at least one time slot to distribute control channel, and always sending will be as the control signal of benchmark to notify their existence own to a plurality of wireless terminals that exist in wireless circulation (cycle), and they and provide notice, the ability of itself of arrival and are used to be provided with the needed state of Radio Link to wireless terminal synchronously.The controlled in wireless part 2 of wireless terminal comprises unshowned modulation circuit and demodulator circuit, and is used for modulation and sends data and they are sent as radio wave, and is used for the radio wave that demodulation receives and extracts the data that received.The receiving-member 3 at intermittence of wireless terminal only was operated in standby (standby) state before communication, and in each frame cycling controlled in wireless part 2, in described frame circulation, only the wireless time slot of the control channel information that is provided by wireless base station 1 is scheduled, therefore makes controlled in wireless part 2 carry out reception off and on.
In order to be reduced in institute's consumed power of the circuit in the holding state, the operate wireless control section 2 off and on, and this is the effective means for the pocket wireless terminal of generally operating by battery.Be identified for receiving the carrier frequency for 2 appointments of controlled in wireless part of control channel information by frequency-hopping carrier frequency specified parts 4, to read frequency-hopping carrier table 5.Same frequency-hopping carrier table 5 is provided in wireless base station 1, this is not illustrated, and described frequency-hopping carrier table 5 is described the sequence of frequency-hopping carrier frequency and a plurality of patterns that obtain by the described frequency hop sequences that is shifted based on the time, and figure 3 illustrates its example.
In the example shown in Fig. 3, indication has prepared to be used for 55 carrier frequencies and 10 frequency-hopping mode P0-P9 of frequency hopping, and by specifying frequency hop sequences call number and frequency-hopping mode number to obtain carrier frequency number uniquely.And, one-period for a circulation of frequency hop sequences (in described accompanying drawing from call number 00 to call number 54), same carrier frequency number does not occur twice, and frequency hop sequences returns call number 00 once more after proceeding to call number 54 from call number 00, therefore repeats.With reference to employed any one frequency-hopping mode, wireless base station 1 provides notice by control channel, and shares information with wireless terminal.
For fear of following air interference, use is registered the standby carrier frequency that is not used as the frequency-hopping carrier frequency according to the radio communication device of the frequency-hopping method of described example in standby carrier wave meter 6.In the example described in Fig. 3, prepared to have 96 carrier frequencies altogether of carrier frequency 0-95, they can be used the radio communication device utilization according to the frequency-hopping method of described example.For this reason, 55 carrier frequencies in wave table, have been got rid of and for preparing to have registered 41 carrier frequencies that will be used to the frequency-hopping carrier frequency standby.
Subsequently, the explanation use is operated according to the reception in the radio communication device of the frequency-hopping method of described example.Check the error detection sign that in unshowned received data, comprises by observing parts 7 such as CRC by interference, received and demodulated data is subjected to the influence of the interference in the middle of 1 the wireless transmission from the wireless base station by controlled in wireless part 2, whether definite thus data symbol that is received is wrong.With by control channel or the reception data independence of following the radio communication of described transmission to send, determine the normality of the Data Labels that received.
Using radio communication device before communication, to be set under the situation of holding state according to the frequency-hopping method of described example, by interfering carrier in advance identification component 8 observe parts 7 and be used for being discerned in advance before the communication receiving for the annoyance level of definite carrier frequency of checking as a result the time of the normality of the data that received by disturbing.For example, more specifically, be under the situation of mistake, to disturbing identification level X to increase by 1 with acquisition X=X+1 disturbing the definite result who observes parts 7.In definite result is under the normal situation, deducts 1 to obtain X=X-1 from disturb identification level X.Suppose that subtracting each other the result has minimum value 0, and do not get negative value.Under the situation of interference identification level X of so calculating, will be defined as having interference in advance as the carrier frequency of target greater than predetermined threshold value.The calculating of disturbing the identification level continuously is up to beginning communication.
And the control channel information that is received comprises that what be provided for the wireless terminal that exists in the wireless circulation of wireless base station 1 only is the information of descent direction.Therefore, according in the sequence shown in the frequency-hopping carrier table 5 with the carrier frequency frequency hopping.On the contrary, under the inconsistent situation of frequency hop sequences, wireless terminal can not receive the control channel information of wireless base station 1, and not by synchronously.
Then, will be given in use according to the explanation of the state that the back is provided with that begins to communicate by letter of the radio communication device of the frequency-hopping method of described example and wireless base station 1.
In order to carry out the transition to the communications status that transmits and receive data, must be by using the independently time slot that separates with the time slot that will in control channel, use to two-way independent communication link (hereinafter referred to as voice channel) is set.And in described voice channel, after beginning to communicate by letter immediately according in the sequence shown in the frequency-hopping carrier table 5 with the carrier frequency frequency hopping.But voice channel is the two-way independent communication links different with control channel.Therefore, if between wireless base station 1 and wireless terminal, reach an agreement, then can carry out control and will be used for the carrier frequency of frequency hop sequences, and need not to use described carrier frequency to avoid having the carrier frequency of interference by their both changes.Use the interference of the standby carrier frequency of registration in standby carrier wave meter 6 to avoid the example of rules explanation.
If determine to observe error that parts 7 obtain and judge as wireless terminal and receive result, then replace parts 9 and send described result of determination to frequency-hopping carrier in the data of the carrier frequency of communication channel by disturbing.Be subjected to the stable interference that frequency-hopping carrier is replaced parts 9 if determine as the carrier frequency of target, one of the standby carrier frequency that then is chosen in the standby carrier wave meter 6 registration to be making amendment, so that described standby carrier frequency is replaced with interfering carrier frequency in the frequency hop sequences described in the frequency-hopping carrier table 5.In addition, be used for transmission data with foundation to the replacement of wireless base station 1 designated carrier frequency to replacing content that carrier wave notice parts 10 provide modification, and by using the ascending voice channel to come to send same data from controlled in wireless part 2.
By in communications status, repeating this operation, in the change in the disturbed condition of following the frequency-hopping carrier frequency that will be used for communicating by letter, always be to use carrier frequency with little interference.Only in as the voice channel of independent communication link, carry out the replacement of carrier frequency.Therefore, do not influence other wireless terminals of listening to control channel.
Then, illustrate that being used for definite frequency-hopping carrier replaces the example that parts 9 are subjected to the condition of interference effect.Check the data that received by disturbing observation parts 7.Only when result of determination is mistake, add 1 to obtain Y=Y+1 to the accumulated interference level.Surpass under the situation of preset threshold value at the accumulated interference level Y that so calculates, determine to have interference to replace the frequency-hopping carrier frequency as the carrier frequency of target.
In the holding state that before beginning to communicate by letter, is provided with, by interfering carrier in advance identification component 8 discern carrier frequency in advance with interference.According to result of determination, be set to by from threshold value, deducting 1 value that obtains as the value of the accumulated interference level Y of the carrier frequency of target.Therefore, can accelerate frequency-hopping carrier and replace parts 9 are discerned interference after carrying out the transition to communications status time.More specifically, can strengthen in the interference of communication by the disturbed condition of before beginning to communicate by letter, grasping all frequency-hopping carrier frequencies that will be used for communicating by letter and avoid ability.
In order to be held in the disturbance state of all the frequency-hopping carrier frequencies in the holding state at the half sole that begins to communicate by letter, must receive all frequency-hopping carrier frequencies.If wireless terminal receives the control channel that is provided according to frequency hop sequences by wireless base station 1 continuously for each frame, then can receive.But, in fact carry out intermittently receiving.For this reason, skip the frame number that will receive at random, therefore can not receive all frequency-hopping carrier frequencies equably.Therefore, need some designs.
Aspect this, use has such structure according to the radio communication device of the frequency-hopping method of described example: be used to carry out the cycle frame numbering that intermittently receives and have the related of the best each other with the sum of the frequency-hopping carrier frequency that will use, be that they both do not have common factor, but have maximum common divisor 1.
Specify with reference to Fig. 4,5 and 6.Fig. 4 shows the relation between the reference key that intermittently receives frame number (intermittently receiving numbering cycle) that circulation receives and frequency hop sequences (frequency-hopping carrier table) for each number, in described frequency hop sequences, be used to carry out the quantity of the cycle frame that intermittently receives and the quantity of the frequency-hopping carrier frequency that will use is set to parameter.In Fig. 4, the sum that intermittently receives circulation is divided into four examples with the frequency-hopping carrier frequency that will use.The reference key of frequency hop sequences number is set to the remainder that obtains divided by the quantity of the frequency-hopping carrier frequency that will use by with frame number.In intermittently receiving, receive the frequency-hopping carrier that has with number consistent numbering of reference key.
Fig. 4 (a) be illustrated in as example, intermittently receive circulation be set to 7 and the quantity of the frequency-hopping carrier frequency that will use be set to the table of the relation under 15 the situation, wherein, the intermittent cyclic sequence number was improved 1 o'clock at every turn, frame number is improved 7 to become the quantity that intermittently receives cycle frame, circular reference call number and do not make same numbering occur simultaneously, and with 15 quantity as the frequency-hopping carrier frequency that will be used to be set to circulate.More specifically, " 1,8,0 ..., 2,9,1,8,0 .., 2,9 ... " circulation 7 in circulate.This indication can receive sequential at intermittence and be received in all carrier frequencies that occur in the frequency hop sequences with same frequency.
Fig. 5 is illustrated in the key diagram of carrying out the reception circulation under the situation about intermittently receiving according to graphic example among Fig. 4 (a).Female (parent) machine sends control information by the time slot 1 of each frame.Divide (extension) machine to carry out off and on and intermittently receive operation, be used for receiving control information (in the circulation of 7 frames) off and on.If (intermittently receive numbering: carrier wave has and has call number in the time of 0): 1 frequency, then (intermittently receive numbering: described carrier wave has and has call number in the time of 1): 8 frequency when the time slot 1 that receives frame 8 subsequently when the time slot 1 that receives frame 1 at special time.(intermittently receive numbering: 2), described carrier wave has and has call number: 0 frequency (not shown) further receiving.
And Fig. 4 (b) is the table that is illustrated in as the relation under the following situation of example: intermittently receive circulation and be set to 16, and the quantity of the frequency-hopping carrier frequency that will use is set to 15.Fig. 4 (c) is the table that is illustrated in as the relation under the following situation of example: intermittently receive circulation and be set to 64, and the quantity of the frequency-hopping carrier frequency that will use is set to 15.Fig. 4 (d) is the table that is illustrated in as the relation under the following situation of example: intermittently receive circulation and be set to 15, and the quantity of the frequency-hopping carrier frequency that will use is set to 16.
Fig. 6 is the table of relation that is illustrated in the key diagram of the superframe among the etsi standard EN300175-3 of for example known DECT (digital enhanced cordless telecommunications) method and is illustrated in the type of the data that each frame index in the superframe sends from the wireless base station.By using these accompanying drawings, below with description operation.
As shown in Figure 6, in the DECT method, be superframe, and determine the type of the data that each frame number sends in superframe 16 frame definitions.In described accompanying drawing, use the frame number 0,2,4,6,10 and 12 in superframe to send the Pt message that is used to provide arrival notice.Only, carry out transmission by using frame number 2,4,6,10 and 12 beginning the transmission of Pt message with frame number 0 usually and existing subsequently under the situation of Pt message.More specifically, if carry out intermittently reception with the sequential of the frame number in superframe 0, then wireless terminal can be waited for when keeping superframe-synchronized and arriving.
And, in the DECT method, consider that receive the intermittence in maximum 4 superframe cycle, i.e. maximum 64 frames circulation, so that support to be used for carrying out more energetically the wireless terminal that intermittently receives.
From the front, in Fig. 4 (b) and Fig. 4 (c), illustrated according to described example, corresponding to the example that intermittently of the superframe-synchronized in using the radio communication device of frequency-hopping method receives.Fig. 4 (b) is the table that relation in the following cases is shown: be set to 16 with the quantity as the frame that constitutes a superframe in the quantity that intermittently receives the frame in the circulation, and the quantity of the frequency-hopping carrier frequency of using is set to 15, wherein, the intermittent cyclic sequence number was improved 1 o'clock at every turn, frame number is improved 16 quantity that are used as intermittently receiving cycle frame, simultaneously by as a circulation and with 15 be set to the frequency-hopping carrier frequency that will use quantity and under the absent variable situation of same numbering the circular reference call number.More specifically, show and to be received in all carrier frequencies that occur in the frequency hop sequences with identical frequency intermittently receiving sequential.
This is performed so that satisfy condition: because with 2 factorial (4 powers of 2) represent as the formation superframe frame quantity 16, if so the quantity of frequency-hopping carrier frequency do not comprise as the factor 2, be that same quantity is set to odd number, the quantity that then is used to carry out the quantity of the cycle frame that intermittently receives and frequency-hopping carrier frequency has best related each other.
Fig. 4 (c) is the table that relation in the following cases is shown: be set to 64 with the quantity as the frame in 4 superframe cycle in the quantity that intermittently receives the frame in the circulation, and the quantity of the frequency-hopping carrier frequency of using is set to 15, wherein, the intermittent cyclic sequence number is increased at 1 o'clock at every turn, frame number increase by 64 is used as intermittently receiving the quantity of cycle frame, simultaneously, by as a circulation and with 15 be set to the frequency-hopping carrier frequency that will use quantity and under the absent variable situation of same numbering the circular reference call number.This is performed so that satisfy condition: because represent as 16 of the quantity of the frame that constitutes superframe with 2 factorial, so be used to carry out the quantity of the cycle frame that intermittently receives and the quantity of frequency-hopping carrier frequency has the related of the best each other.And, intermittently receive 2 the factorial that circulation is set to superframe cycle, so that the factor only is set to 2, and the quantity of frequency-hopping carrier frequency is set to not comprise 2 odd numbers as the factor.
Then, Fig. 4 (d) shows as can not be as mentioned above representing to constitute example under situation example, that in the quantity of the frame that constitutes superframe be odd number of situation of quantity of frame of superframe with 2 factorial.Fig. 4 (d) is the table that relation in the following cases is shown: be set to 15 with the quantity as the frame in a superframe cycle in the quantity that intermittently receives the frame in the circulation, and the quantity of the frequency-hopping carrier frequency of using is set to 16, wherein, the intermittent cyclic sequence number is increased at 1 o'clock at every turn, frame number increase by 15 is used as intermittently receiving the quantity of cycle frame, simultaneously, by as a circulation and with 16 be set to the frequency-hopping carrier frequency that will use quantity and under the absent variable situation of same numbering the circular reference call number.More specifically, this indication can receive in the sequential at intermittence and be received in all carrier frequencies that occur in the frequency hop sequences with identical frequency.
This is performed so that satisfy condition: because are odd numbers as 15 of the quantity of the frame that constitutes superframe, if so there is not quantity common divisor, that promptly be represented as 2 factorial to be set to the quantity of frequency-hopping carrier frequency, the quantity that then is used to carry out the quantity of the cycle frame that intermittently receives and frequency-hopping carrier frequency has best related each other.
In described example, change the threshold value of the replacement of the carrier frequency be used to determine to have interference, to quicken the corresponding replacement sequential after communication begins of state with the interference of the frequency-hopping carrier frequency of before the communication beginning, determining.Therefore, can shorten the needed time of best frequency-hopping mode that changes to from beginning to communicate by letter to,, strengthen the ability of avoiding of disturbing thus to alleviate the mutual interference mutually with other devices.And, by repeating intermittently to receive to be chosen in all carrier frequencies described in the frequency-hopping mode in total time corresponding with the frequency-hopping carrier frequency.Therefore, can obtain the control channel information that transmits by the wireless base station, and simultaneously, can be before beginning to communicate by letter the disturbed condition of all carrier frequency of monitoring.And, provide: disturb and observe parts, be used to observe the disturbance state of monitored frequency-hopping carrier frequency; Interfering carrier is identification component in advance, is used for discerning in advance before the communication beginning having the frequency-hopping carrier frequency of interference; Frequency-hopping carrier is replaced parts, is used for when the interfering frequency of determining the frequency-hopping carrier frequency after the communication beginning surpasses predetermined threshold the frequency-hopping carrier frequency being replaced with standby carrier frequency; Replace carrier wave notice parts, be used for notifying the content of the frequency-hopping carrier frequency of disturbed replacement, and make mutual frequency-hopping mode consistent each other to communication parter.Therefore, can avoid ability by the interference that following manner strengthens in communication: be used to determine the threshold value of the replacement of the carrier frequency after the communication beginning by change with interference, with accelerate with begin in communication before the corresponding replacement sequential of disturbance state of the frequency-hopping carrier frequency discerned in advance.
(second example)
With reference to Fig. 7-13 second example of the present invention is described below.
Fig. 7 is the figure that illustrates according to the structure of the FHSS communicator of described example.As shown in Figure 7, described FHSS communicator comprises: frequency-hopping mode table 108 is used to manage the frequency-hopping carrier frequency that will be used for frequency hopping, and receives its state; Frequency switching part 105 is used for switching the carrier frequency that will communicate by letter in regular turn according to frequency-hopping mode; The carrier wave that uses observe parts 104, be used to observe the accepting state of the carrier frequency that is being used as frequency-hopping mode; Standby carrier wave electric field intensity measuremenrt parts 102 are used for measuring by the free time that use is used to send and receive the electric field strength of standby carrier wave; Exchange carrier determining section 106 is used for determining according to the comparison of measurement result and set threshold value whether carrier wave is tradable standby carrier wave; Standby carrier list 109, the exchange priority that is used to manage all standby carrier waves; Frequency-hopping mode control section 107 is used for controlling according to frequency-hopping mode table and standby carrier list the exchange of carrier frequency; Transmit block 103 is used for sending the carrier frequency exchange message to communication parter; And wireless portion 101, be used to set up Radio Link and for communication parter transmission/reception data.
The operation that explanation is had the FHSS communicator of aforesaid structure.Fig. 8 shows and determines that standby carrier wave is the processing of commutative/non-swappable carrier frequency.Fig. 9 shows the standby carrier list in the communication beginning, and wherein, each standby carrier wave has the interference counter that is initialized to " 1 ".Be used for by using time division multiplexing to handle the FHSS communicator of executive communication, existing neither, execution sends the time of also not carrying out reception.By using described free time, carry out reception operation (Fig. 8: step 201 and 202) with the order that the stem from standby carrier list begins.At one's leisure, communication parter never uses standby carrier wave to carry out and sends processing.Therefore, the radio wave that receives in receiving processing is the interference electric wave that is produced by other wireless devices.
The electric field strength (Fig. 8: step 203) that standby carrier wave electric field intensity measuremenrt parts 102 are measured in reception, and with the threshold (Fig. 8: step 204) of described electric field strength and default electric field strength.If described electric field strength is bigger, even then determine to use its standby carrier wave, also is difficult to executive communication under the interference of disturbing electric wave, and increases progressively the interference counter (Fig. 8: step 205) of standby carrier wave.On the contrary, if described electric field strength is littler,, do not receive the interference of disturbing electric wave and the interference counter of the standby carrier wave that successively decreases (if it is not " 0 ") (Fig. 8: step 206) even then determine to use standby carrier wave yet.In the exchange of carrier frequency, the carrier frequency with interferometer numerical value " 0 " is set to tradable carrier frequency, and other are set to non-swappable carrier frequency.
Figure 12 shows the processing that will carry out in the exchange of carrier frequency.Figure 10 shows the frequency-hopping mode table in voice begin, and wherein, corresponding employed carrier wave has the error counter that is initialized to " 0 ".Figure 11 shows the exchange caused change in front and back of the carrier frequency in standby carrier list and frequency-hopping mode table.
When switching the communication carrier frequency in regular turn with according to the frequency-hopping mode table of sharing by communication parter during executive communication, detect and receive wrong (Figure 12: step 602) if employed carrier wave is observed parts 104, then have employed carrier frequency f
nError counter increase progressively (Figure 12: step 603), and if carry out normal the reception, then error counter is initialized to " 0 " (Figure 12: step 610).In this case,, promptly made continuous reception mistake (Figure 12: step 605), then determined employed carrier wave f if the error count value is equal to or greater than " 2 "
nThe be interfered interference of electric wave, and handle and proceed to the carrier frequency swap operation.Carry out retrieval with the order that the stem from standby carrier list begins, and when finding tradable carrier frequency f
rThe time finish retrieval, and from standby carrier list with frequency f
rThe carrier frequency of candidate and delete (Figure 12: step 608) in return.In this case, frequency-hopping mode control section 107 has been arranged the f of frequency-hopping mode table therein
n(Figure 12: step 607) and error counter are initialized to the position f of " 0 "
rLast execution is replaced.Afterbody in standby carrier list adds f
n, be initialized as " 3 " will disturb counter.
Transmit block 103 has next frequency hopping frequency f
N+1Transmission in utilize control field to come to send carrier frequency exchange request (Figure 12: step 609) to communication parter, and with f
N+1Reception in confirm response from communication parter.Do not return described response (Figure 12: step 612) if can not confirm described response (Figure 12: step 604) or communication parter owing to receive wrong owing to receive wrong, then in next frequency hopping frequency f
N+2Transmission with receive in carry out identical processing.
(the 3rd example)
Below with reference to Figure 13 the 3rd example of the present invention is described.
Figure 13 is the figure that illustrates according to the structure of the FHSS communicator of the 3rd example.The carrier wave electric field intensity measuremenrt parts 710 and the threshold calculations parts 711 of using of the electric field strength that is used to measure employed carrier wave are provided in the structure according to first example as shown in figure 13.
The operation that explanation is had the FHSS communicator of aforesaid structure.When the communication carrier frequency will be switched in regular turn with according to the frequency-hopping mode of being shared by communication parter during executive communication, institute's carrier wave that uses is observed parts 704 and is observed and receive wrong/normally receptions.Only carrying out under the normal situation about receiving institute's carrier wave electric field intensity measuremenrt parts that use 710 measurement electric field strength.When can be in specific environment during executive communication, replace the electric field strength value of absolute interference electric wave and depend on relative interference electric wave the electric field strength value (under the big situation of the electric field strength that causes the communication carrier frequency because communication distance is little, also can executive communication even the electric field strength of interference electric wave is bigger.On the contrary, under the little situation of the electric field strength that causes the communication carrier frequency because communication distance is big,, also be difficult to executive communication) even disturb the electric field strength of electric wave little to identical degree.Therefore, threshold calculations parts 711 are in the electric field strength of communication carrier frequency and disturb between the electric field strength of electric wave default " difference ", so that can communicate by letter, and by electric field strength and described " difference " calculated threshold of measured communication carrier frequency.In first example, described threshold value is used as the threshold value that will be used to determine whether to exchange the electric field strength of standby carrier wave.
If be used for the storing communication carrier wave each frequency N electric field strength and be not subjected to owing to keep out the threshold value of the influence of the electric field strength that the temporary transient chance that causes by operation of the physical shielding thing of radio wave alters a great deal for calculating the method for the selected conduct of method calculated threshold threshold calculations parts 711 of N subthreshold in the past, then can calculating from mean value.
By being that another kind of computational methods select to calculate (the method for A * W)/(W+1)+R/ (W+1), represent measured electric field strength, represent mean value and represent the mean value of weight by W as having by A by R, thereby execution weighting, to reflect the value of the electric field strength of measuring recently widely, and, can be suppressed at the influence of the big change in the accidental electric field strength that produces, and setting can be followed the threshold value that moves the change in electric field strength that causes owing to actual physical.
Application on the＜industry 〉
Obvious from above-mentioned explanation, according to example of the present invention, even be used as the specific carriers of frequency-hopping mode Frequency be interfered electric wave impact and with carrier exchange for subsequent use, it is also observed as tool continuously then The accepting state that the carrier wave for subsequent use of lowest priority is arranged. Therefore, described carrier frequency can fully confirmed Again circulate as the carrier frequency of tradable carrier frequency after can communicating by letter. Therefore, can obtain this The advantage of sample: keep continuously communication quality, in described communication quality and the wireless environment in communicating by letter Various changes are corresponding and for a long time always stable.
And, in example of the present invention, in the electric-field intensity of the communication period measurement carrier wave that uses, and And corresponding with the change of the electric-field intensity of use carrier wave and dynamically change and be used for improving or reduce that each is standby Threshold value with the interference counter of carrier wave. Therefore, can improve tradable carrier wave for subsequent use quantity or Can avoid the exchange of useless carrier frequency. Therefore, can obtain to carry out the advantage of effective exchange.
To switch in the method for frequency-hopping carrier frequency as order in the frequency hopping described in the frequency-hopping carrier table, press Has such structure according to radio communication device of the present invention: in the state that before radio communication begins, arranges The circulation of each constant (constant) in received communication partner's control channel, carry out intermittent reception, will The sum of the frequency-hopping carrier frequency in the frequency-hopping carrier table is set to m, each in the intermittent reception operation Have a rest to receive in the circulation frequency hop sequence in the frequency-hopping carrier table is skipped n, switch to carry out, and so that n With the total m of frequency-hopping carrier frequency have each other best related, that is, so that they both have maximum Common divisor 1, and do not have common factor.
Therefore, there is not mutual common factor at the quantity n of the jump that intermittently receives the carrier frequency in the operation and the quantity m of frequency-hopping carrier frequency.For this reason, by multiplying each other of they obtained least common multiple, and for wherein with corresponding by the quantity of the product representation of n and m and the period that carry out frequency hopping does not receive same frequency.Therefore, the sum by the frequency-hopping carrier frequency is set to circulate and the frequency of circular gap reception operation.Therefore, by receiving the intermittence of only carrying out control channel, may be received in all carrier frequencies described in the frequency-hopping carrier table with number of hops n.
And, constitute a frame by a plurality of sending time slots and a plurality of receiving slot therein and according to the order of frequency-hopping carrier table under the situation of each time slot switched carrier frequency, send control information in the predetermined sending time slots of first communicator in a frame, and the second communication device execution as its partner intermittently receives operation, and the time slot discontinuous of the being scheduled to ground that is used for circulating at each constant frame improves and receives from the control information of first communicator transmission.In intermittently reception is operated, as intermittently the quantity (will carry out the quantity of the frame of reception) of the frame of reception circulation and the sum of the frequency-hopping carrier frequency of describing in the frequency-hopping carrier table are set to have the related of the best each other.
According to this configuration, be used to carry out the quantity of the cycle frame that intermittently receives and the sum of frequency-hopping carrier frequency and do not have common factor each other.For this reason, obtain least common multiple as each product, and in the frame part of representing by least common multiple, by will be unequal divided by the remainder that the sum of frequency-hopping carrier frequency obtains, and be set to the described remainder that circulates by the sum of frequency-hopping carrier frequency in the frame number that intermittently receives in the circulation sequential.More specifically, frequency-hopping carrier frequency specified parts receives and to receive the circulation sequential intermittence equal the sum that enters the frequency-hopping carrier frequency in the described frame part represented by least common multiple, and the remainder that is circulated is set to index with reference frequency-hopping carrier table, selects the frequency-hopping carrier frequency thus.Therefore, use radio communication device to be received in all carrier frequencies of describing in the frequency-hopping carrier table: the control channel that receives relative (opposed) wireless base station by the previous stage off and in the communication beginning by following manner according to frequency-hopping method of the present invention.
And, being used for the superframe is that unit carries out the discontinuous reception method that intermittently receives the intermittence of receiving-member, superframe cycle is set to the quantity that can represent with 2 factorial, and the quantity of the frequency-hopping carrier frequency of describing in the frequency-hopping carrier table is set to odd number.And intermittently the quantity of the cycle frame that receives is set to 2 factorial of superframe cycle, and the quantity of frequency-hopping carrier frequency is set to odd number.
By these structures, can keep superframe-synchronized.Therefore,, can reduce the current sinking of the device in the holding state of not executive communication, and before communication, receive by all carrier frequencies of frequency hopping by being received in the customizing messages that provides in the superframe cycle such as arrival notice.
And, even intermittently receive being set to odd number and representing the quantity of frequency-hopping carrier frequency of circulation the intermittence of receiving-member, also can before communication, receive all carrier frequencies of frequency hopping with 2 factorial.
In addition, comprise: disturb and observe parts, be used to monitor the data that receive by communicator, to observe the disturbed condition of frequency-hopping carrier frequency as the partner according to radio communication device of the present invention; And interfering carrier identification component in advance, be used for having the carrier frequency of interference in advance and the frequency-hopping carrier frequency that received is distinguished mutually before the communication beginning.
According to this configuration, can with the reception of control channel simultaneously and the disturbed condition of all frequency-hopping carrier frequencies that monitoring is described in the frequency-hopping carrier table in each constant circulation, and distinguish mutually with the frequency-hopping carrier frequency that is received by only monitoring before the communication beginning carrier frequency that will have interference at the disturbed condition of the control channel that intermittently receives wireless base station relative in the sequential.Therefore, can---carry out if any---by using other devices of same frequency for the detection of following the change in the frequency of fixing interference electric wave.
And provide: standby carrier wave meter is used for describing the standby carrier frequency except the carrier frequency of describing at the frequency-hopping carrier table; Frequency-hopping carrier is replaced parts, be used for according to the observed result of disturbing the observation parts, the frequency-hopping carrier frequency that will describe in the frequency-hopping carrier table when the interfering frequency of determining the frequency-hopping carrier frequency surpasses predetermined threshold replaces with the carrier frequency of describing in standby carrier wave meter; And replace carrier wave notice parts, be used for to the communication parter notice by the content of disturbing the frequency-hopping carrier frequency of replacing, so that mutual frequency-hopping mode is consistent each other.
According to this configuration, after the frequency-hopping carrier group of frequencies that will use begins communication, receive when disturbing when detecting interference owing to other devices that use identical frequency band, carrier frequency with interference is replaced by the carrier frequency of selecting from untapped standby carrier frequency groups, and, also notify carrier frequency to be replaced, revise to have identical frequency-hopping mode to carry out with interfering carrier frequency to communication parter.Therefore, can be in the change of the disturbed condition of following the frequency-hopping carrier frequency that will be used to communicate by letter and avoid interference.
And, according to the interfering carrier recognition result of identification component in advance, replace parts by frequency-hopping carrier and change the threshold condition that will be replaced by standby carrier frequency.Therefore, can accelerate the replacement of the frequency-hopping carrier frequency after the communication beginning, strengthen the ability of avoiding of disturbing thus with interference.
And frequency hopping communicating device is characterized in that: the electric field strength of measuring the carrier frequency in standby carrier list to be observing standby carrier wave, and to surpass the frequency of predetermined threshold corresponding and increase or reduction has the interference counter of standby carrier wave with electric field strength.The exchange of the carrier wave that used of carrying out with the order order that depends on the value of disturbing counter, that begin from the standby carrier wave that has above the low-limit frequency of threshold value in the following cases and being interfered: the employed carrier wave that is interfered the frequency modulation pattern will exchange with one of standby carrier wave, and the carrier frequency of deleting from frequency-hopping mode is set to have the worst-case value (frequency that electric field strength surpasses threshold value is retained as height, so that the interference counting appliance that will reach has maximum or minimum value) as the initial value that disturbs counter.
By this structure, begin to observe the carrier frequency of deleting from frequency-hopping mode from the poorest interference Counter Value.Therefore, keep the state of " can not exchange ", up to reducing the described frequency that surpasses threshold value for the measured electric field strength of described frequency fully.Therefore, disturbing after counter has optimum value for carrier frequency, promptly fully the affirmation carrier frequency can communicate, described carrier frequency is circulated again as tradable carrier frequency.Therefore, can have function: change corresponding and the long-time stabilised quality that always keeps communication continuously with the various of wireless environment in communication.
And, frequency hopping communicating device according to a eighth aspect of the present invention is characterized in that: receive the interference of disturbing electric wave, and, be set to be lower than other standby carrier waves so that will be used as the priority of frequency-hopping carrier frequency once more in the end interpolation of standby carrier list and the carrier frequency of standby carrier exchange.Described frequency hopping communicating device has function: receiving when disturbing recirculation immediately from the carrier frequency of frequency-hopping mode deletion, and avoiding the variation of wireless quality, keeping the stabilised quality of communication thus.
And, frequency hopping communicating device according to a first aspect of the present invention is characterized in that: measure the electric field strength of employed carrier wave in communication period, and corresponding with the change in the electric field strength of employed carrier wave and dynamically change the threshold value that is used to improve or reduce interference counter with each standby carrier wave.When measured electric field strength is big, can improve threshold value, easily determine thus to exchange standby carrier wave.When measured electric field strength hour, can reduce described threshold value, easily determine thus to exchange standby carrier wave.Therefore, frequency hopping communicating device has function: can improve tradable standby carrier wave, and avoid the useless exchange of carrier frequency, thus exchange carrier frequency effectively.
In addition, for example there is such function: under the situation that will from past N time the mean value of the electric field strength of employed carrier wave, calculate the threshold value that is used to improve or reduce interference counter with each standby carrier wave, can calculate the threshold value that is not influenced by electric field strength, described electric field strength is owing to the physical shielding thing of resisting radio wave temporarily causes accidental change greatly by operation.
In invention according to a twelveth aspect of the present invention, frequency hopping communicating device according to a fourth aspect of the present invention is characterized in that: the value of the electric field strength of measuring is weighted recently, with big degree be reflected as the method for the mean value of the electric field strength of calculating employed carrier wave, described method is used to calculate the threshold value of the interference counter that is used to improve or reduce each standby carrier wave.Described frequency hopping communicating device has function: can be suppressed at the influence of the big change in the electric field strength that produces by change, and, the threshold value that also can follow moved the change in electric field strength that causes by actual physics can be set.
Claims (20)
1. radio communication device that uses frequency-hopping method comprises:
The controlled in wireless part is used for sending and receiving wireless signal;
The frequency-hopping carrier table has first frequency hop sequence of a plurality of carrier frequencies;
The frequency-hopping carrier frequency selector, the controlled in wireless part that is used to insulate is selected one of carrier frequency with first frequency hop sequence according to the frequency-hopping carrier table; And
Intermittently receiver is used for instructing the radio control section branch to use predetermined circulation to come to receive control signal from communication parter at the holding state of described communicator;
Wherein, the frequency-hopping carrier frequency selector is during holding state, instruction controlled in wireless part is selected one of carrier frequency according to second frequency hop sequence, described second frequency hop sequence is determined by first frequency hop sequence is skipped Integer N, described Integer N is less than integer M, and integer M represents the sum of a plurality of carrier frequencies.
2. according to the communicator of claim 1, wherein, Integer N is set to have the related of the best each other with integer M.
3. a radio communication device comprises first communicator and second communication device, and they communicate with one another with frequency-hopping method, and described device comprises:
The frequency-hopping carrier table comprises a plurality of carrier frequencies,
Wherein, a frame is made up of a plurality of sending time slots and a plurality of receiving slot,
Order with the frequency-hopping carrier table is switched described carrier frequency at each time slot;
First communicator sends control information in the predetermined sending time slots of a frame,
Carry out intermittently to receive operation as the second communication device of the communication parter of first communicator, be used for improving off and on by predetermined time slot and receiving from the control information of first communicator transmission by each constant frame circulation, and
Sum as the quantity of the frame that receives the circulation that receives the intermittence in the operation at intermittence and the frequency-hopping carrier frequency of describing in the frequency-hopping carrier table is set to have the related of the best each other.
4. a radio communication device that uses frequency-hopping method is used for the switched carrier frequency, to carry out transmission/reception according to the frequency-hopping carrier table that is made of a plurality of carrier frequencies, comprising:
The controlled in wireless part is used for carrying out intermittently receiving operation, receives operation described intermittence and is used for during standby cycling through control channel at each constant frame and improves off and on and receives from the control information of partner device transmission; And
Frequency-hopping carrier is replaced parts, and the carrier frequency that is used for will having in time interference replaces with standby carrier frequency, avoiding and the corresponding interference of degree in the interference of the carrier frequency of communication beginning back use,
Wherein, have the related of the best each other as the quantity that receives the frame that receives circulation intermittence in the operation at intermittence and the sum of the frequency-hopping carrier frequency of in the frequency-hopping carrier table, describing.
5. according to the radio communication device of claim 4, wherein, intermittently receiving-member is carried out intermittently for units of super-frames and is received, and
Superframe cycle is set to have the quantity that can represent with 2 factorial, and the quantity of the frequency-hopping carrier frequency of describing in the frequency-hopping carrier table is set to odd number.
6. according to the radio communication device of claim 5, wherein, intermittently the receiving-member quantity that is used to carry out the cycle frame that intermittently receives is set to 2 factorial of superframe cycle, and
The quantity of frequency-hopping carrier frequency is set to odd number.
7. according to the radio communication device of claim 4, wherein, intermittently the receiving-member quantity that is used to carry out the cycle frame that intermittently receives is set to odd number, and
The quantity that can represent the frequency-hopping carrier frequency with 2 factorial.
8. according to the radio communication device of any one claim of claim 4-7, comprise disturbing and observe parts, be used to monitor and divide the data that receive, and observe the disturbed condition of frequency-hopping carrier frequency by radio control section; And
Interfering carrier is identification component in advance, and the carrier frequency that is used for will having in advance interference is distinguished mutually with the frequency-hopping carrier frequency of reception before the communication beginning.
9. according to the radio communication device of claim 8, also comprise: standby carrier wave meter is used for describing the standby carrier frequency except the carrier frequency of describing at the frequency-hopping carrier table; Frequency-hopping carrier is replaced parts, be used for according to disturbing the observed result of observing parts in communication beginning back, when the interfering frequency of determining the frequency-hopping carrier frequency surpassed predetermined threshold, the frequency-hopping carrier frequency that will describe in the frequency-hopping carrier table replaced with the carrier frequency of describing in standby carrier wave meter; And replace carrier wave notice parts, be used for to the communication parter notice by disturbing the content of the frequency-hopping carrier frequency of replacing, so that mutual frequency-hopping mode is consistent each other.
10. radio communication device that uses frequency-hopping method comprises:
The frequency specified parts is used for partly being provided for to controlled in wireless with predetermined frequency-hopping mode according to the frequency-hopping carrier table order of switched carrier frequency;
Disturb and observe parts, be used to monitor and divide the data that receive, and observe the disturbed condition of carrier frequency by radio control section;
Receiving-member intermittently is used for each the constant loop start carrier frequency specified parts of the state that was provided with and received communication partner's control channel before radio communication begins;
Standby carrier wave meter is used for describing the standby carrier frequency except the carrier frequency of describing at the frequency-hopping carrier table;
Frequency-hopping carrier is replaced parts, be used for according to disturbing the observed result of observing parts in communication beginning back, when the interfering frequency of determining carrier frequency surpassed predetermined threshold, the special carrier frequency that will describe in the frequency-hopping carrier table replaced with a carrier frequency in standby carrier wave meter;
Replace carrier wave notice parts, be used for replacing the up-to-date content of adding the carrier frequency of frequency-hopping carrier table to of parts by frequency-hopping carrier to the communication parter notice, so that mutual frequency-hopping mode is consistent each other,
Wherein, be used for carrying out the quantity (wanting the number of hops of switched carrier frequency) of the cycle frame that intermittently receives and in the sum of the frequency-hopping carrier frequency that the frequency-hopping carrier table is described is set to relation between the quantity that intermittently receives the frequency-hopping carrier frequency that circulates and will use, have optimal relevance each other.
11. radio communication device according to claim 8, wherein, according to interfering carrier in the state that before communication beginning, is provided with in advance the recognition result of identification component change by frequency-hopping carrier and replace the threshold condition that parts are replaced with standby carrier frequency, quicken the replacement of frequency-hopping carrier frequency thus and avoid ability with the enhancing interference.
12. the interference avoidance method in the radio communication device that uses frequency-hopping method, described device are used for carrying out transmission/reception when switching according to the frequency-hopping carrier table that is made of a plurality of carrier frequencies, described method comprises step:
Carry out intermittently receiving operation, be used for skipping the carrier frequency of every predetermined quantity, during standby, to carry out reception with having a rest at predetermined intercycle at the frequency-hopping carrier table; And
The sum of feasible intermittently reception circulation and the frequency-hopping carrier frequency of describing in the frequency-hopping carrier table intermittently has the related of the best in the reception operation each other.
13., wherein, receive cyclic representation described intermittence and be used in reference to be shown in and receive the quantity that sequential is wanted the number of hops of received carrier frequency at each in intermittently receiving according to the interference avoidance method of claim 12.
14. the interference avoidance method in the radio communication device that uses frequency-hopping method, described device are used for carrying out transmission/reception in the basis frequency-hopping carrier table switched carrier frequency that is made of a plurality of carrier frequencies, described method comprises step:
Carry out intermittently to receive operation, receive operation described intermittence and be used for during standby cycling through control channel and improve off and on and receives from the control information of partner device transmission at each constant frame;
Make and have the related of the best each other as the quantity that receives the frame that receives circulation intermittence in the operation at intermittence and the sum of the frequency-hopping carrier frequency of in the frequency-hopping carrier table, describing; And
Corresponding with the annoyance level of the carrier frequency of using after communication beginning and carrier frequency that will have interference in time replaces with standby carrier frequency, avoid interference thus.
15. the interference avoidance method in the radio communication device that uses frequency-hopping method comprises step:
The electric field strength of the carrier frequency of measurement in standby carrier list is observed standby carrier wave thus;
Raising or reduction have the interference counter of standby carrier wave above the frequency of predetermined threshold is corresponding with electric field strength; And
When the employed carrier wave that is interfered in frequency-hopping mode will be replaced by one of standby carrier wave, carry out and the exchange of the carrier wave that used that is interfered with the order order that depends on the value of disturbing counter, that begin from the standby carrier wave that has above the low-limit frequency of threshold value, and the carrier frequency of deleting from frequency-hopping mode is set to have the worst-case value of the initial value of conduct interference counter.
16. interference avoidance method according to claim 15, wherein, receive the interference of disturbing electric wave, and, will be set to be lower than other each standby carrier waves as the priority of frequency-hopping carrier frequency once more thus in the end interpolation of standby carrier list and the carrier frequency of standby carrier exchange.
17. interference avoidance method according to claim 15, wherein, measure the electric field strength of employed carrier wave in communication period, and dynamically change the threshold value that is used to improve or reduce interference counter with each standby carrier wave along with the change in the electric field strength of employed carrier wave.
18., wherein, from past N time the mean value of the electric field strength of employed carrier wave, calculate the threshold value of the interference counter that is used to improve or reduce each standby carrier wave according to the interference avoidance method of claim 17.
19. interference avoidance method according to claim 18, wherein, the value of the electric field strength of measuring is weighted recently, with big degree be reflected as the method for the mean value of the electric field strength of calculating employed carrier wave, the method for the mean value of the electric field strength of the employed carrier wave of described calculating is used to calculate the threshold value of the interference counter that is used for improving or reduce each standby carrier wave.
20. the interference avoidance method in the radio communication device that uses frequency-hopping method comprises step:
By utilizing the electric field strength of measuring the carrier frequency in standby carrier list in the free time of communication period transmission/reception;
When each described electric field strength surpasses predetermined threshold, increase progressively the interference counter of standby carrier wave;
If described electric field strength is no more than described predetermined threshold, the interference counter then successively decreases;
According to the value of disturbing counter determine whether described standby carrier wave commutative/not commutative;
Retrieve the carrier frequency that can exchange with the order that the stem from standby list begins,, suppress thus to disturb with the exchange of execution with the carrier wave that used of the interference of the electric wave that is interfered,
Wherein, have big value, carry out in that counter is initialized as for after the observation of standby carrier wave and confirming that fully its carrier frequency can be communicated by letter, will be from the carrier frequency of frequency-hopping mode deletion as tradable carrier frequency and recirculation.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP195057/2003 | 2003-07-10 | ||
| JP195059/2003 | 2003-07-10 | ||
| JP2003195057A JP3719254B2 (en) | 2003-07-10 | 2003-07-10 | Frequency hopping wireless communication device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1820426A true CN1820426A (en) | 2006-08-16 |
| CN100442676C CN100442676C (en) | 2008-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800197781A Expired - Lifetime CN100442676C (en) | 2003-07-10 | 2004-07-09 | Radio communication apparatus and interference avoiding method |
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| JP (1) | JP3719254B2 (en) |
| CN (1) | CN100442676C (en) |
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| CN101179821B (en) * | 2006-11-07 | 2010-06-02 | 华为技术有限公司 | Method, device and system for implementing terminal access in wireless communication system |
| CN102315860A (en) * | 2010-07-09 | 2012-01-11 | 株式会社日立制作所 | Wireless communication system and wireless communications method |
| CN102577216A (en) * | 2009-07-28 | 2012-07-11 | 因特莱特公司 | Interference avoidance in a frequency hopping wireless network |
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| JPH07147553A (en) * | 1993-11-24 | 1995-06-06 | Sanyo Electric Co Ltd | Frequency hopping communication method and device therefor |
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| CN102577216A (en) * | 2009-07-28 | 2012-07-11 | 因特莱特公司 | Interference avoidance in a frequency hopping wireless network |
| CN103560807A (en) * | 2010-07-09 | 2014-02-05 | 株式会社日立制作所 | Radio communication system and radio communication method |
| CN102315860B (en) * | 2010-07-09 | 2014-04-02 | 株式会社日立制作所 | Frequency selection in a frequency hopping radio communications system |
| CN103560807B (en) * | 2010-07-09 | 2015-07-08 | 株式会社日立制作所 | Radio communication system and radio communication method |
| CN102315860A (en) * | 2010-07-09 | 2012-01-11 | 株式会社日立制作所 | Wireless communication system and wireless communications method |
| CN103796295B (en) * | 2012-10-31 | 2017-05-17 | 西门子医疗器械公司 | Synchronous access method in frequency hopping wireless communication, communication equipment and communication system |
| CN105144821A (en) * | 2013-06-29 | 2015-12-09 | 华为技术有限公司 | Method and apparatus for determining signaling channel location |
| CN105144821B (en) * | 2013-06-29 | 2019-03-19 | 华为技术有限公司 | Signaling channel location determining method and device |
| WO2020233184A1 (en) * | 2019-05-22 | 2020-11-26 | 大唐移动通信设备有限公司 | Method and system for determining frequency hopping pattern |
| CN115694550A (en) * | 2023-01-04 | 2023-02-03 | 成都爱旗科技有限公司 | Method and device for realizing Bluetooth frequency hopping based on radio frequency chip and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005033416A (en) | 2005-02-03 |
| CN100442676C (en) | 2008-12-10 |
| JP3719254B2 (en) | 2005-11-24 |
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