The name of the invention: a point-to-point radio systems, point-to-point wireless devices, and a communication control method
Technical field
[0001]
　The present disclosure relates to switching control of the radio channel at the point-to-point radio systems.
Background technique
[0002]
　Point-to-point radio system using a microwave or a millimeter wave or the like is known (e.g. see Patent Document 1). In a point-to-point radio system, perform a digital communication two communication devices via a point-to-point wireless link. Specifically, each communication device comprises a directional antenna for communicating with the remote device by the point-to-point wireless technology, direct a directional beam to the opposite apparatus. Thus, point-to-point radio link is established between the two communication devices. In this specification, each of the two communication devices constituting a point-to-point radio system, i.e. a communication device using a point-to-point wireless technology to communicate with the opposing device, referred to as a point-to-point radio system.
[0003]
　In one example, a point-to-point wireless system uses a Frequency Division Duplexing (FDD) for two-way simultaneous communication (full-duplex communication). Furthermore, the combination of the two used radio channel used in the bidirectional radio link may be fixedly determined. In this case, point-to-point radio system uses two radio channels of a fixed frequency interval (fixed frequency spacing) for FDD. Radio channel may also be referred to as a radio frequency carrier (radio frequency carrier).
[0004]
　For example, 59 to use frequency band of 63GHz (so-called unlicensed band) for the FDD, consider the case where the channel interval (channel spacing) and 50MHz. In this case, it is possible to center frequency 59.00,59.05 and used., One radio link 40 channels is 60.90,60.95GHz (referred to as a forward link), the center frequency There can be used 61.00,61.05, ..., to 62.90,62.95GHz a is 40 channel the other radio link (referred to as reverse link). Furthermore, assuming that these radio channels are used at a fixed frequency interval (fixed frequency spacing), as shown in FIG. 1, a combination of 59.00GHz and 61.00GHz, 59.05GHz and 61.05GHz and so a combination of, it is possible to use two radio channels of 2GHz intervals in the forward and reverse links.
CITATION
Patent literature
[0005]
Patent Document 1: European Patent No. 1545037 Pat
Patent Document 2: Japanese Unexamined Patent Publication No. 2004-187089
Summary of the invention
Problems that the Invention is to Solve
[0006]
　The inventors of the present invention is, the assumption that the point-to-point wireless system uses a FDD with a fixed frequency interval as described above, was examined procedure of return from one-way communication.
[0007]
　If the FDD with a fixed frequency interval is carried out, normally in one radio link (e.g., reverse link) any failure (e.g., reduction or wireless link disconnection of the reception quality) is generated, said one radio link If it is not possible to receive the point-to-point radio system not only switches the operational radio channel of said one radio link failure, used radio channel of the other radio link (e.g., forward link) It must be switched at the same time. Therefore, it is able to return to normal communicable state at one of the radio link switch to the radio channel, the possibility the other radio links would receive a new communication failure in the switching destination wireless channel there is. In the worst case, there is a possibility that two-way communication are both possible. Thus, systems using FDD with a fixed frequency spacing, it is necessary to carefully perform control procedures for returning from unidirectional communication due to failure in one radio link.
[0008]
　One way, it is conceivable to prepare the additional wired line or wireless line for maintenance or control between a pair of point-to-point wireless devices. In this case, a pair of point-to-point radio system, using a redundant line for maintenance or control, may be carried a control procedure for switching the operational radio channel. However, the use of a redundant line for maintenance or control, may not be preferable from the viewpoint of frequency utilization efficiency or cost of the apparatus.
[0009]
　Incidentally, Patent Document 2 discloses a procedure for switching using a radio channel in a wireless communication system composed of a wireless master unit and a plurality of Musenko machine. Specifically, the wireless master unit Patent Document 2, and instructs the search of free channels Musenko machine receives the search result of the vacant channel from Musenko machine, perform a search of free channels or wireless master unit itself and instructs the change to the new operating radio channel determined based on the idle channel search results for the wireless master unit and Musenko machine to the wireless master unit. Thereby the wireless master unit and Musenko machine, switches the operational radio channel. However, Patent Document 2, not assumed a system that uses Frequency Division Duplexing (FDD) with a fixed frequency interval, does not show the case that use radio channel is switched at the same time of the two-way radio link.
[0010]
　Thus, one object to be achieved embodiments disclosed herein, if the Frequency Division Duplexing with a fixed frequency spacing (FDD) is used, redundant line for maintenance or control the is to provide a two-way contribute point-to-point wireless system to safely switch that use radio channel without using. Incidentally, this objective should embodiments disclosed herein may be noted that only one of a plurality of object to be achieved. Other objects or problems and novel features will become apparent from the description, or the accompanying drawings.
Means for Solving the Problems
[0011]
　In one embodiment, point-to-point radio system, comprising a first and a second radio unit that performs point-to-point radio communication bidirectional. It said first and said second radio device, from said first from said wireless device a second wireless device forward link and the second wireless device toward the reverse link toward said first wireless device It is configured to perform in concert the change procedure of using the radio channel. The changing step,
(a) said reverse link new reverse channel and said new said besides reverse channel reverse link at least one free reverse channel available in to be used as the used radio channel the explicit or implicitly first notification indicating that the first sending from the wireless device to the second radio unit, and
(b) in the second radio device, the new reverse channel If the reception quality of a new forward channels associated with is not good, corresponding to further new forward channel to be used as the used radio channel of the forward link, the at least one free reverse channel it, determining from at least one forward channel attached
including.
Effect of the invention
[0012]
　According to the above-described embodiment, when a Frequency Division Duplexing with a fixed frequency spacing (FDD) is used, safely switch a bidirectional use radio channels without a redundant line for maintenance or control in particular it can provide a contributing point-to-point radio systems.
Brief description of the drawings
[0013]
Is a diagram showing an example of a radio channel arrangement in FDD with Figure 1 fixed frequency interval.
FIG. 2 is a block diagram showing a configuration example of a point-to-point radio system according to the first embodiment.
[3] is a sequence diagram showing a specific example of a change procedure of using the radio channel according to the first embodiment.
4 is a sequence diagram showing a specific example of a change procedure of using the radio channel according to the second embodiment.
5 is a sequence diagram showing a specific example of a change procedure of using the radio channel according to a third embodiment.
DESCRIPTION OF THE INVENTION
[0014]
　Hereinafter, specific embodiments will be described in detail with reference to the accompanying drawings. In the drawings, the same or corresponding components are denoted by the same reference numerals, for clarity of description, repeated explanation is omitted as appropriate.
[0015]

　FIG. 2 shows a configuration example of a point-to-point radio system according to the present embodiment. Point-to-point radio system of the present embodiment includes a point-to-point radio device 1 and 2. Radio apparatus 1 and 2, each having an antenna 10 and 20. Antenna 10 and 20 is a directional antenna. Further, the wireless device 1 and 2 has a transceiver (the radio transceivers) 11 and 21, respectively. Wireless device 1 and 2 establishes a point-to-point radio links 51 and 52 of the two-way between the antenna 10 and 20 by mutually facing a directional beam to each other. Wireless transceiver 11 and 21 via the wireless link 51 and 52 transmits a signal in both directions between each other.
[0016]
　Hereinafter, for convenience of explanation, referred to as a radio link 51 "forward link" directed from the wireless device 1 to wireless device 2, a radio link 52 directed from the wireless device 2 to the wireless device 1 and "reverse link" call. Moreover, it is reserved for forward link 51, each of the plurality of radio channels available in the forward link 51 is referred to as a "forward channel". Similarly, reserved for the reverse link 52, a plurality of each of the wireless channels available in the reverse link 52 is referred to as a "reverse channel". Using the radio channels of the forward link 51 is selected from among a plurality of forward channel, using the radio channel of the reverse link 52 is selected from among a plurality of reverse channels.
[0017]
　Point-to-point radio system according to the present embodiment uses the Frequency Division Duplexing (FDD) with a fixed frequency interval. Therefore, use radio channels used radio channels and reverse link 52 of the forward link 51 are separated from one another by a fixed frequency spacing. For example, as shown in FIG. 1, using radio channels of the forward link 51 may be separated from the use radio channels of the reverse link 52 by 2 GHz. That is, each of the plurality of forward channel in accordance with a fixed frequency spacing, are associated in advance with any one of the plurality of reverse channels. Using radio channels of the forward link 51, foil because it is determined independently from that of the reverse link 52 is determined along with that of the reverse link 52 in accordance with a fixed frequency interval.
[0018]
　Wireless device 1 and 2 further comprises a controller 12 and 22, respectively. Controller 12 and 22 are configured to perform in concert the change procedure of using the radio channels of the forward link 51 and reverse link 52. Controller 12 and 22 may further perform other control. For example, the controller 12 and 22, weather conditions (for example, rain, fog, mist, fumes, smoke or smog,) in order to cope with the changes in the propagation state by, such as modulation scheme and coding rate wireless link 51 and 52 Adaptive Modulation and Coding vary depending on the quality of (link adaptation) may be performed.
[0019]
　Then, in following describes a specific example of the change procedure of using the radio channels is performed by the wireless device 1 and 2 (controller 12 and 22). 3 is a sequence diagram showing a specific example of a procedure for changing the change procedure of using the radio channel according to the present embodiment. In step S101, the radio apparatus 1 detects the degradation of reception quality of the reverse link 52. Change procedure uses radio channels is typically performed in order to avoid interference with a particular radio channel received from other radio systems. Therefore, the reception quality to be monitored in step S101 to trigger the change procedure of using the radio channel may typically be a Signal to Interference plus Noise Ratio (SINR). Furthermore, in order to distinguish it from the weather conditions worse or reverse link 52 prospects by shielding by some structure (line of sight) is degraded, in addition to the SINR received signal strength (Received Signal Strength Indicator (RSSI)) There may also be used.
[0020]
　In step S102, in response to the reception quality degradation of the reverse link 52 is detected, the wireless device 1 uses the current use radio channels of the forward link 51, the wireless device 2 a predetermined notification Send. Predetermined notification in step S102, in one example, which may (idle channel search notification) indicating that the free channel search is performed in the wireless device 1. In combination or with which Alternatively, predetermined notification in step S102 may be shown that the reverse link 52 failure is detected may indicate a request for idle channel search in the radio device 2 .
[0021]
　In step S103, the radio device 2, in response to receiving a predetermined notification in step S102, it transmits the received notified (Acknowledgement). Acknowledgment is transmitted using the current use radio channels of the reverse link 52. Incidentally, in a situation where the reception quality of the reverse link 52 is decreased, the acknowledgment arrives normally to the radio device 1 is not guaranteed. Accordingly, transmission of the acknowledgment in step S103 may be omitted.
[0022]
　In step S104A and S104B, wireless devices 1 and 2 are both run the free channel search. That is, the radio apparatus 1 searches for a free channel available in the reverse link 52 (ie, Description clear channel or unoccupied channel). On the other hand, the wireless device 2, to search for a free channel that can be used in the forward link 51 (clear channel or unoccupied channel). Channel search step S104A, in response to the transmission of predetermined notification in step S102, or may be initiated in response to a predetermined standby time from the transmission of the predetermined notification has elapsed. Channel search step S104B, in response to receiving a predetermined notification in step S102, or may be initiated in response to a predetermined standby time from the reception of the predetermined notification has elapsed.
[0023]
　In step S105, the radio device 1 based on the idle reverse channel search result in step S104A, determines a new reverse channel to be used as the used radio channel reverse link 52. However, in step S105, the result of free forward channel search by the wireless device 2 is not taken into consideration. This is because, in a situation where the reception quality of the reverse link 52 is lowered, since it is difficult to tell successfully to the wireless device 1 the results of the free forward channel search from the radio device 2.
[0024]
　As described above, a point-to-point radio system according to the present embodiment uses the FDD with a fixed frequency spacing. Therefore, the new reverse channel that is determined at step S105, is associated with the new forward channel. Then, change of use the radio channel in the reverse link 52 is inevitably causes changes in the operational radio channels of the forward link 51. In this regard, in step S105, the radio apparatus 1 may also be referred to as determining a reverse channel and a combination of the forward channel to be newly used wireless channel.
[0025]
　In step S106, the radio apparatus 1 transmits a channel change notification to the wireless device 2. Channel change notification, the current (that is, before the change) of the forward link 51 are transmitted using using radio channels. This is because the current (before change) using radio channels of the forward link 51, there is a high possibility of being successfully received at the wireless device 2. If the use of a new forward channel after the change, for the channel change notification is not it is to be guaranteed to reach successfully to the wireless device 2, it may become unable to communicate in both the forward link 51 and reverse link 52 is there.
[0026]
　Channel change notification transmitted in step S106, the explicitly or implicitly indicating the new reverse channel determined in step S105. The channel change notification, a new forward channel may include at identifiable identifier of at least one of the combinations of the new reverse channel, and the new two-way use the radio channel. As already described, the forward channel and the reverse channel are associated in advance in accordance with a fixed frequency relationship. Therefore, the identifier of a new reverse channel implies a new forward channel, the identifier of the similarly new forward channel will imply a new reverse channel.
[0027]
　Further, the channel change notification transmitted in step S106, in addition to the new reverse channel to be used as the used radio channel reverse link 52, available on the reverse link 52 in addition to the new reverse channel exhibits at least one free reverse channel. Each of the at least one free reverse channel is a vacant channel is found in the free channel search step S104A (clear channel or unoccupied channel).
[0028]
　In step S107, the radio device 2, in response to receiving the channel change notification in step S106, transmits the received notified (Acknowledgement). The acknowledgment is sent using the current (ie before change) using radio channels of the reverse link 52. However, that said acknowledgment is successfully reached the radio device 1 is not guaranteed. Therefore, similarly to the reception notification at step S103, the transmission of the acknowledgment in step S107 may be omitted.
[0029]
　In step S108A and S108B, wireless devices 1 and 2 are both change the two-way use radio channel. That is, the radio device 1 and 2 together, the use radio channels in the reverse link 52 is changed to a new reverse channel determined in step S105. At the same time, the wireless device 1 and 2 together, the use radio channels of the forward link 51 is changed to a new forward channel which has been previously correlated (according to the fixed frequency interval) in a new reverse channel. Operation of step S108A, in response to the transmission of change notification in step S106, or may be initiated in response to a predetermined standby time from the transmission of the change notification has expired. Operation of step S108B, in response to receiving the change notification in step S106, or may be initiated in response to a predetermined standby time from the reception of the change notification has expired.
[0030]
　If the reception quality of the new two-way use radio channel after the change (in other words, a new forward channel and a new reverse channel) are both good, the wireless device 1 and 2, the change procedure of use radio channel It should be completed. For example, the wireless device 1 and 2 may transmit each other using a new use radio channels a notification indicating the change completion, thereby may complete the procedure of changing the operational radio channel.
[0031]
　However, at the completion of steps S108A and B, it should be noted that the reception quality is not guaranteed in a radio apparatus 2 use the radio channel (new forward channel) of the forward link 51 after the change. This is because, in order between the steps S102 to S108A and B are one-way communication state reverse link 52 can not be used successfully, bidirectional new use radio for the purpose of returning the reverse link 52 normally channel determination in (step S105) in a wireless device 1 which is the receiving side of the reverse link 52 is performed separately, the reception quality of the forward link 51 in the wireless device 2 is because it is not considered. Accordingly, the wireless device 2 is may not be normally received in the new forward channel of the forward link 51. To address this problem, steps S 109 ~ S113A and B of Figure 3 illustrates a further procedure for normalizing the reception status of the forward link 51.
[0032]
　In step S109, the radio device 2 detects the degradation of reception quality of the forward link 51. Reception quality to be monitored in step S109 may be a SINR, or a combination of SINR and RSSI. In the example of FIG. 3, because the search for free forward channel is performed in step S104B, the radio device 2, at the time of reception of the change notification in step S106, good reception quality of a new forward channel It can be recognized based on the search result of free forward channel that not. Therefore, without performing detection of degradation in the receiving quality of the forward link 51 at step S109, the radio device 2 may immediately determine that the new forward channel is not appropriate.
[0033]
　In step S110, the radio device 2 determines a further new forward channel to be used as the used radio channels of the forward link 51. Wireless device 2 knows the at least one free reverse channel notified from the radio apparatus 1 by a change notification in step S106. Therefore, the radio device 2 associated with the at least one free reverse channel (that is, apart fixed frequency spacing) from at least one forward channel, further determines a new forward channel it is sufficient. More particularly, the radio device 2 knows the idle forward channel by the search in step S104B. Therefore, the radio device 2, product set (intersection of the idle forward channel sets obtained by the search of the forward channel set and step S104B associated with idle reverse channel notified from the radio device 1, intersection out of), it may be determined to further new forward channel.
[0034]
　In step S111, the radio device 2 transmits a channel change notification to the wireless device 1. Channel change notification is transmitted using a new reverse channel that is applied in step S108A and 108B. Channel change notification in step S111 is explicitly or implicitly indicating the new forward channel determined in step S110. The channel change notification, further new forward channel, only needs to further contain a new reverse channel, and further new two-way use identifiable identifier of at least one of combinations of radio channels. As already described, the forward channel and the reverse channel are associated in advance in accordance with a fixed frequency relationship. Therefore, further implying a further new forward channel identifier of a new reverse channel, as well as further identifier of a new forward channel further implies a new reverse channel.
[0035]
　In step S112, the radio device 1, in response to receiving the channel change notification in step S111, transmits the received notified (Acknowledgement). The reception notice, the current use radio channels of the forward link 51 (ie, the new forward channel after being changed in step S108A and B) is transmitted using. However, in situations where the reception quality of the forward link 51 is lowered, that the reception notification can be successfully reached the wireless device 2 is not guaranteed. Therefore, similarly to the reception notification at step S103 and S107, the transmission of acknowledgment in step S112 may be omitted.
[0036]
　In step S113A and S113B, wireless devices 1 and 2 are both change the two-way use radio channel. That is, the radio device 1 and 2 together, the use radio channels of the forward link 51 is changed to further new forward channel determined in step S110. At the same time, both the wireless device 1 and 2 changes the use radio channels in the reverse link 52, to further new forward channel (according to the fixed frequency spacing) further new forward channel that is related in advance . Operation of step S113A, in response to receiving the change notification in step S112, or may be initiated in response to a predetermined standby time from the reception of the change notification has expired. Operation of step S113B, in response to the transmission of change notification in step S112, or may be initiated in response to a predetermined standby time from the transmission of the change notification has expired.
[0037]
　As understood from the above description, point-to-point radio device 1 and 2 according to the present embodiment uses the FDD with a fixed frequency spacing. When a failure of the reverse link 52 occurs, the wireless device 1 uses the current forward link 51, a new reverse channel and other of the at least one free reverse to be used on the reverse link 52 to notify the channel to the wireless device 2. Then, the radio device 1 and 2, to use a new reverse channel and which (according to a fixed frequency interval) the associated new forward channel, the use of forward link 51 and reverse link 52 to change both the radio channel. Although this way is reachability reverse link 52 is secured, there is a possibility that the arrival of the forward link 51 is lost instead. If the reachability of the forward link 51 is lost, the wireless device 2 further new from at least one forward channel associated with at least one free reverse channel notified from the radio device 1 to determine the forward channel, and notifies the wireless device 1. Then, the radio device 1 and 2, to use a further new forward channel and this (in accordance with a fixed frequency spacing) the associated further new reverse channel, the forward link 51 and reverse link 52 to change the use radio channels together. By adopting such a change procedure, the wireless device 1 and 2, maintenance or bidirectional use radio channels without a redundant line for control can now safely switch safely from single communication state it is possible to return.
[0038]
　Incidentally, changing the procedure of using the radio channels shown in FIG. 3 is merely an example, may be partially changed. For example, in step S111, the radio device 2 includes, in addition to further new forward channel to be used on the forward link 51 may notify the other free forward channel to the wireless device 1. Thus, if, it can cope when further new forward channel (according to the fixed frequency interval) the associated reverse channel determined by the radio device 2 is not appropriate for the wireless device 1. That is, the radio device 1 is provided with a free reverse channel set associated with the idle forward channel notified from the radio device 2, the intersection (intersection of the idle reverse channel sets obtained by the search in step S104A , from the intersection), it may be determined following further new reverse channel.
[0039]
　Further, the arrangement of the idle channel search (Step S104A and S104B) shown in FIG. 3 may be suitably changed. The modification of the arrangement of free channel search is described in the following second and third embodiments.
[0040]

　The present embodiment describes a modification of the change procedure of using the radio channels that are described in the first embodiment. Configuration example of a point-to-point radio system according to the present embodiment is the same as FIG.
[0041]
　Figure 4 is a sequence diagram showing a specific example of a change procedure of using the radio channels is performed by the wireless device 1 and 2 (controller 12 and 22). In the example of FIG. 4, as compared with the example of FIG. 3, the arrangement of the idle channel search is mainly changed. That is, in the example of FIG. 4, the radio device 1 and 2, in any occasion before the fault detection of the reverse link 52 (step S 202), idle reverse channel search (step S201A) and the free forward channel search ( step S201B) to run. For example, the wireless device 1 and 2, in the operation stop period scheduled by the operator, may be carried out idle channel search.
[0042]
　Processing in step S 203 ~ S211A and B in FIG. 4 are similar to those of the processing in step S 105 ~ S113A and B in FIG. 3, a description thereof will be omitted. In step S203, the free reverse channel search result of step S201A is used. In step S208, the free forward channel search of a result of step S201B is used.
[0043]
　By the procedure of FIG 4, it is possible to obtain the same effects as those described in the first embodiment. That is, the radio device 1 and 2, maintenance or bidirectional use radio channels without a redundant line for control can now safely switch, can be safely return from single communication state.
[0044]
　Further, according to the procedure of FIG 4, since the idle channel can be grasped in advance prior to the fault detection can contribute to a reverse link 52 is returned quickly from the single communication unusable. However, if the free channel search in steps S201A and S201B has elapsed time since taking place, perhaps the quality of the channel was clear at the time when idle channel search is reduced. Accordingly, in step S203, the radio device 1, for one of the reverse channel selected as a new use radio channels in the reverse link 52, confirmation of reception quality is preferably performed. This confirmation can be completed in a short time compared to the free channel search over the entire frequency band in the forward channel. Similarly, in step S208, the wireless device 2, for one of the forward channel to be selected as a further new use radio channels of the forward link 51, confirmation of reception quality is preferably performed.
[0045]

　The present embodiment describes a further modification of the first change procedure uses radio channels that are described in the embodiments. Configuration example of a point-to-point radio system according to the present embodiment is the same as FIG.
[0046]
　5 is a sequence diagram showing a specific example of a change procedure of using the radio channels is performed by the wireless device 1 and 2 (controller 12 and 22). In the example of FIG. 5, as compared with the example of FIG. 3, the arrangement of the idle channel search is mainly changed. That is, in the example of FIG. 5, the radio device 2, after the failure detection of the forward link 51 (step S309) in itself, and executes the free forward channel search (step S 312).
[0047]
　Processing in step S 301 ~ S 303 and S 305 ~ S 309 in FIG. 5 is similar to the processing in steps S 101 ~ S 103 and S 105 ~ S 109 in FIG. In step S304, the wireless device 1 performs the free reverse channel search. On the other hand, unlike FIG. 3, the wireless device 2 does not perform the free forward channel search.
[0048]
　At step S310, the in response to the reception quality degradation of the forward link 51 is detected, the radio device 2, current use radio channels of the reverse link 52 (that is, after being changed in step S308A and B using a reverse channel) new of, it transmits a predetermined notification to the wireless device 1. Predetermined notification in step S310, in one example, which may (idle channel search notification) indicating that the free channel search is performed in the wireless device 2. In combination or with which Alternatively, the predetermined notification step S310 may indicate that a fault is detected in the forward link 51.
[0049]
　In step S 311, the wireless device 1, in response to receiving the notification of step S310, the transmitting acknowledgment to (Acknowledgement). The reception notice, the current use radio channels of the forward link 51 (ie, the new forward channel after being changed in step S308A and B) is transmitted using. However, in situations where the reception quality of the forward link 51 is lowered, that the reception notification can be successfully reached the wireless device 2 is not guaranteed. Accordingly, transmission of the acknowledgment in step S311 may be omitted.
[0050]
　In step S312, the wireless device 2, to search for a free channel that can be used in the forward link 51 (clear channel or unoccupied channel). Channel search of step S312, in response to the transmission of predetermined notification of step S310, the or may be initiated in response to a predetermined standby time from the transmission of the predetermined notification has elapsed.
[0051]
　Processing in steps S313 ~ S316A and B is the same as the processing in steps S 110 ~ S113A and B in FIG. In step S 313, the free forward channel search result in step S312 is used.
[0052]
　By the procedure of FIG. 5, it is possible to obtain the same effects as those described in the first embodiment. That is, the radio device 1 and 2, maintenance or bidirectional use radio channels without a redundant line for control can now safely switch, can be safely return from single communication state.
[0053]

　process related change procedure uses a radio channel to be performed by each of the above-mentioned radio device 1 and 2 (controller 12 and 22) are realized by using a semiconductor processing apparatus comprising a Application Specific Integrated Circuit (ASIC) it may be. These processes, at least one processor may be realized by executing a program on a computer containing (eg microprocessor, Micro Processing Unit (MPU), Central Processing Unit (CPU)). Specifically, to create one or more programs including instructions for performing the algorithm described with reference to a sequence diagram and the like herein in a computer system, be supplied to the program in a computer system good.
[0054]
　This program is stored using a non-transitory computer-readable media of various types (non-transitory computer readable medium), it can be supplied to the computer. Non-transitory computer-readable media, including the recording medium with various types of entities (tangible storage medium). Examples of non-transitory computer readable media include magnetic recording medium (eg a flexible disc, magnetic tape, hard disk drive), a magneto-optical recording medium (eg optical disk), Compact Disc Read Only Memory (CD-ROM), CD- including R, CD-R / W, a semiconductor memory (eg a mask ROM, Programmable ROM (PROM), Erasable PROM (EPROM), flash ROM, Random Access memory (RAM)). Further, the program may be supplied to the computer by a transitory computer-readable media of various types (transitory computer readable medium). Examples of transitory computer readable media include electric signals, optical signals, and electromagnetic waves. Transitory computer-readable media includes wired communications path, such as wires and optical fibers, or via a wireless communication path, can be supplied to program the computer.
[0055]
　In addition, the embodiments described above are only examples for the application of the technical idea obtained by the inventors of the present invention. That is, the technical concept is not limited only to the embodiments described above, it is needless to say various modifications are possible.
[0056]
　This application claims priority based on Japanese Patent Application No. 2014-054548, filed on March 18, 2014, the entire disclosure of which is incorporated herein.
Description of the code
[0057]
1, 2, point-to-point wireless devices
10, 20, antenna
11 and 21 transceiver (radio
transceiver) 12, 22 controller

The scope of the claims
[Claim 1]
　It comprises a bidirectional point-to-point radio communication with a first and a second radio apparatus for performing,
　the first and the second radio apparatus, the forward direction from the first wireless apparatus to the second radio unit configured to perform link and from the second radio unit to coordinate the change procedure of using the radio channels of the reverse link toward the first wireless device,
　wherein the changing step,
the use of (a) said reverse link the explicit or implicitly first notification indicating at least one free reverse channel available in the reverse link in addition to a new reverse channel and said new uplink channel to be used as a wireless channel, sending from the first wireless apparatus to the second wireless device, and
in (b) the second radio apparatus, the reception quality of a new forward channels associated with the new reverse channel If not good, determining a further new forward channel to be used as the used radio channel of the forward link, from at least one forward channel the associated at least one free reverse channel thing,
equipped with a point-to-point radio systems.
[Claim 2]
　The changing step, after the transmission of the first notification, in both of the first and second wireless devices, as well as changing the operational radio channel of the reverse link to the new reverse channel, the forward further comprising altering the use radio channel direction link to the new forward channel to the new reverse channel, point-to-point radio system according to claim 1.
[Claim 3]
　Wherein the first notification, the forward in the direction link, current use radio channels are transmitted using, claim 1 or 2 point-to-point radio system according to the forward link.
[Claim 4]
　The changing step,
　the further explicit or implicitly indicate the second notification, sending from the second wireless device to the first wireless device, and a new forward channel
　the second notice after transmission of, both of the first and second wireless devices, as well as changing the operational radio channel of the forward link to the further new forward channel, the use radio channels of the reverse link further be changed to one of associated with the new forward channel said at least one free reverse channel,
further comprising,
a point-to-point radio system according to any one of claims 1 to 3 .
[Claim 5]
　Wherein the second notification, wherein the reverse link is transmitted using a new reverse channel, point-to-point radio system according to claim 4.
[6.]
　Wherein the second notification, the further new forward than the direction channel further exhibits at least one free forward channels available in the forward link, point-to-point radio system according to claim 4 or 5.
[7.]
　The change procedure, in the first radio device further comprises selecting the next reverse channel from at least one reverse channel associated with said at least one free forward channel, claims point-to-point wireless system according to 6.
[8.]
　It said first and second radio unit, using Frequency Division Duplexing with a fixed frequency intervals communicate with each other,
　using the radio channel use the radio channel and the reverse link of the forward link, the fixed have been only frequency interval are separated from each other,
point-to-point radio system according to any one of claims 1 to 7.
[9.]
　Said new forward channel, said is associated according to the fixed frequency intervals to the new reverse channel,
　said further new forward channel, one of said at least one free reverse channel the associated according to a fixed frequency interval, the
point-to-point radio system according to claim 8.
[10.]
　The changing step,
　prior to transmission of the first notification in response to detecting the degradation in the receiving quality of the reverse link at the first wireless device, the second from the first wireless device of transmitting a third notification to the wireless device, and
　prior to transmission of the third notice transmitted after and the first notification, the vacant channel of the reverse link at the first wireless device perform a search, the second in the wireless device to perform a search of vacant channels of the forward link,
further comprising,
a point-to-point radio system according to any one of claims 1 to 9.
[11.]
　Wherein the first notification indicates the identifier of the wireless channel combination corresponding to each of said new reverse channel and said at least one free reverse channel,
　to the second notification, the further new forward channel indicates an identifier of a corresponding radio channel combination,
a point-to-point radio system according to any one of claims 4-7.
[12.]
　A point-to-point wireless devices,
　point-to-point and a wireless communication means for communicating with the opposing device by wireless technology,
　the point-to-point wireless from the forward link and the opposing device toward the opposite apparatus from the point-to-point wireless devices , and control means for performing the procedure of changing use radio channel of the reverse link toward the apparatus
equipped with,
　the change procedure, the reverse link used to reverse channels and the new new is used as a radio channel the explicit or implicitly first notification indicating at least one free reverse channel available in the reverse link in addition to a reverse channel, comprises transmitting to the opposite apparatus,
point-to-point radio system.
[13.]
　Wherein the first notification, in the forward link is transmitted using the current use wireless channel of the forward link, point-to-point radio apparatus according to claim 12.
[14.]
　The change procedure, said after the transmission of the first notification, along with the changes the use radio channel of the reverse link to the new reverse channel, the new reverse channel using radio channel of the forward link further comprising, a point-to-point radio apparatus according to claim 12 or 13 to change to a new forward channels associated with.
[15.]
　The change procedure is further explicitly or that the implicitly show the second notification is received from the opposing device a new forward channel; here, the further new forward channel, the new reverse channel reception quality of a new forward channels associated with the if not good, in the counter device, wherein is selected from among the at least one forward channel associated with at least one free reverse channel, point-to-point radio apparatus according to claim 13 or 14 further comprising a.
[16.]
　The change procedure, said after the reception of the second notification, the order together with the use of radio channel of direction link to change to the further new forward channel, the reverse link of the use of radio channel said further new order further comprising changing to one of the at least one free reverse channel associated with a direction-channel, point-to-point radio apparatus according to claim 15.
[17.]
　Wherein the second notification, wherein the reverse link is transmitted using a new reverse channel, point-to-point radio apparatus according to claim 15 or 16, wherein.
[18.]
　Wherein the second notification, the further and further exhibits at least one free forward channels available in the forward link in addition to new forward channel, point-of any one of claims 15-17 point a wireless device.
[19.]
　The point-to-point radio apparatus and the opposite apparatus uses Frequency Division Duplexing with a fixed frequency intervals communicate with each other,
　using the radio channel use the radio channel and the reverse link of the forward link, the They are separated from one another by a fixed frequency spacing,
point-to-point radio apparatus according to any one of claims 12 to 18.
[20.]
　The change procedure is
　transmitted before transmission of the first notification in response to detecting the degradation in the receiving quality of the reverse link in the point-to-point radio system, a third notification to the counter device to that, and
　before transmission of the third notice transmitted after and said first notification, performing a search for a free channel of the reverse link,
further comprising,
any of claims 12 to 19 or point-to-point wireless device according to one of claims.
[21.]
　A point-to-point wireless devices,
　point-to-point and a wireless communication means for communicating with the opposing device by wireless technology,
　the counter from the forward link and the point-to-point wireless device extending from the opposing device to the point-to-point wireless devices , and control means for performing the procedure of changing use radio channel of the reverse link toward the apparatus
equipped with,
　the change procedure is,
(a) new reverse channel should be used as the use of the radio channel of the reverse link and receiving an explicit or implicitly first notification indicating at least one free reverse channel available in the reverse link in addition to the new uplink channel from the opposing device, and
(b) the new a case reception quality of a new forward channels associated with the reverse channel is not good, yet the new forward direction from at least one forward channel, wherein associated with at least one free reverse channel to determine the channel,
equipped with a,
point-to-point wireless devices.
[22.]
　The change procedure, said after the receipt of the first notification, along with the changes the use radio channel of the reverse link to the new reverse channel, the new reverse channel using radio channel of the forward link further comprising changing to a new forward channels associated with the point-to-point radio apparatus according to claim 21.
[23.]
　Wherein the first notification, in the forward link, current use is transmitted using a radio channel, point-to-point radio apparatus according to claim 21 or 22 of the forward link.
[24.]
　The change procedure is
　to send explicitly or implicitly indicate second notification said further new forward channel to the opposing apparatus, and
　after the transmission of the second notification, the use of the forward link while changing the radio channel to said further new forward channel, to one of the the use wireless channel of the reverse link associated with the further new forward channel at least one free reverse channel changing,
further comprising,
a point-to-point radio apparatus according to any one of claims 21 to 23.
[25.]
　Wherein the second notification, the in the reverse link is transmitted using a new reverse channel, point-to-point radio apparatus according to claim 24.
[26.]
　Wherein the second notification, the further and further exhibits at least one free forward channels available in the forward link in addition to new forward channel, point-to-point radio apparatus according to claim 24 or 25.
[27.]
　The point-to-point radio apparatus and the opposite apparatus uses Frequency Division Duplexing with a fixed frequency intervals communicate with each other,
　using the radio channel use the radio channel and the reverse link of the forward link, the They are separated from one another by a fixed frequency spacing,
point-to-point radio apparatus according to any one of claims 21 to 26.
[28.]
　The changing step,
　prior to the reception of the first notification in response to detecting the degradation in the receiving quality of the reverse link in the opposite apparatus, receiving a third notification from the opposing device, and
　prior to receiving the third notification received after and the first notification, performing a search for a free channel of the forward link,
further comprising,
any one of claims 21-27 point-to-point wireless device according to.
[29.]
　A communication control method performed by the point-to-point wireless devices,
　the point-to-point wireless device, toward the point-to-point wireless equipment from the forward link and the opposing device toward the opposite apparatus from the point-to-point wireless devices the reverse link is configured to communicate with the counter device by the point-to-point wireless technology,
　the communication control method, (a) said reverse link using the new reverse channel and said to be used as a wireless channel the explicit or implicitly first notification indicating at least one free reverse channel available in the reverse link in addition to a new reverse channel comprises transmitting to the opposite apparatus,
communication control method.
[30.]
　A communication control method performed by the point-to-point wireless devices,
　the point-to-point wireless devices, extending from the forward link and the point-to-point wireless equipment headed from the opposing device to the point-to-point wireless device to the opposite apparatus the reverse link is configured to communicate with the counter device by the point-to-point wireless technology,
　the communication control method,
(a) said reverse link using the new reverse channel and said to be used as a wireless channel receiving an explicit or implicitly first notification indicating at least one free reverse channel available in the reverse link in addition to a new reverse channel from the opposing device, and
(b) the new If the reception quality of a new forward channels associated with the reverse channel is not good, a further new forward channel to be used as the used radio channel of the forward link, wherein the at least one free reverse determining from at least one forward channel associated with the channel,
it includes a,
communication control method.
[31.]
　Non-transitory computer readable medium storing a program for causing a communication control method according to the computer to claim 29 or 30.