WO2015141127A1 - ポイントツーポイント無線システム、ポイントツーポイント無線装置、及び通信制御方法 - Google Patents
ポイントツーポイント無線システム、ポイントツーポイント無線装置、及び通信制御方法 Download PDFInfo
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- H—ELECTRICITY
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- H04W72/20—Control channels or signalling for resource management
- H04W72/27—Control channels or signalling for resource management between access points
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- H—ELECTRICITY
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- H04W72/02—Selection of wireless resources by user or terminal
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- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- the present disclosure relates to radio channel switching control in a point-to-point radio system.
- a point-to-point wireless system using microwaves or millimeter waves is known (see, for example, Patent Document 1).
- a point-to-point wireless system two communication devices perform digital communication via a point-to-point wireless link.
- each communication device includes a directional antenna for communicating with the opposite device using point-to-point wireless technology, and directs a directional beam toward the opposite device.
- a point-to-point wireless link is established between the two communication devices.
- each of the two communication devices constituting the point-to-point wireless system that is, a communication device that communicates with the opposite device using the point-to-point wireless technology is referred to as a point-to-point wireless device.
- the point-to-point wireless system uses Frequency-Division-Duplexing (FDD) for bidirectional simultaneous communication (full-duplex communication). Further, the combination of two used radio channels used in the bidirectional radio link may be fixedly determined. In this case, the point-to-point radio system uses two radio channels with fixed frequency spacing for FDD. A radio channel may also be referred to as a radio frequency carrier.
- FDD Frequency-Division-Duplexing
- a frequency band of 59 to 63 GHz (so-called unlicensed band) is used for FDD and the channel spacing is set to 50 MHz.
- 40 channels whose center frequencies are 59.00, 59.05,..., 60.90, 60.95 GHz can be used for one radio link (referred to as a forward link).
- 40 channels with 61.00, 61.05, ..., 62.90, 62.95 GHz can be used for the other radio link (referred to as reverse link).
- these radio channels are used at a fixed frequency spacing, as shown in FIG. 1, a combination of 59.00 GHz and 61.00 GHz, 59.05 GHz and 61.05 GHz.
- two radio channels spaced at 2 GHz can be used for the forward link and the reverse link.
- the inventor of the present invention examined the procedure for returning from one-way communication assuming that the point-to-point wireless system uses FDD with a fixed frequency interval as described above.
- one radio link for example, reverse link
- some kind of failure for example, degradation of reception quality or radio link disconnection
- the point-to-point wireless system cannot receive the signal
- the point-to-point wireless system not only switches the wireless channel used by the one of the failed wireless links but also uses the wireless channel of the other wireless link (for example, the forward link).
- the other radio link may receive a new communication failure in the switch-destination radio channel.
- two-way communication may be impossible. Therefore, a system using FDD with a fixed frequency interval needs to carefully perform a control procedure to recover from one-way communication due to a failure on one radio link.
- the pair of point-to-point wireless devices may perform a control procedure for switching the used wireless channel using a redundant line for maintenance or control.
- using redundant lines for maintenance or control may not be preferable from the viewpoint of frequency utilization efficiency or equipment cost.
- Patent Document 2 discloses a procedure for switching a used wireless channel in a wireless communication system including a wireless master device and a plurality of wireless slave devices. Specifically, the wireless master device in Patent Document 2 instructs the wireless slave device to search for an empty channel, receives the search result of the empty channel from the wireless slave device, and performs the search for the empty channel by the wireless master device itself. Then, the wireless master unit is instructed to change to a new operational wireless channel determined based on the search result of the empty channel in the wireless master unit and the wireless slave unit. Thus, the wireless master device and the wireless slave device switch the operation wireless channel.
- Patent Document 2 does not assume a system that uses Frequency-Division-Duplexing (FDD) with a fixed frequency interval, and does not show a case where the radio channels used in the bidirectional radio link are switched simultaneously.
- FDD Frequency-Division-Duplexing
- one of the objectives that the embodiments disclosed herein attempt to achieve is to maintain redundant lines for maintenance or control when Frequency Division Duplexing (FDD) with fixed frequency spacing is used. It is to provide a point-to-point wireless system that contributes to the safe switching of two-way used wireless channels without using. It should be noted that this object is only one of a plurality of objects that the embodiments disclosed herein intend to achieve. Other objects or problems and novel features will become apparent from the description of the present specification or the accompanying drawings.
- FDD Frequency Division Duplexing
- the point-to-point wireless system includes first and second wireless devices that perform bidirectional point-to-point wireless communication.
- the first and second wireless devices include a forward link from the first wireless device to the second wireless device and a reverse link from the second wireless device to the first wireless device.
- the wireless radio channel changing procedure is configured to be performed in a coordinated manner.
- the change procedure is as follows: (A) explicit or implied new reverse channel to be used as a radio channel used for the reverse link and at least one free reverse channel available on the reverse link in addition to the new reverse channel A first notification indicated by the first wireless device to the second wireless device, and (b) in the second wireless device associated with the new reverse channel If the reception quality of the new forward channel is not good, at least one forward channel to be used as a radio channel used for the forward link is associated with the at least one free reverse channel. Determining among the two forward channels, including.
- the radio channel for bidirectional use can be switched safely without using a redundant line for maintenance or control. It is possible to provide a point-to-point wireless system that contributes to this.
- FIG. 1 is a block diagram illustrating a configuration example of a point-to-point wireless system according to a first embodiment. It is a sequence diagram which shows the specific example of the change procedure of the use radio channel which concerns on 1st Embodiment. It is a sequence diagram which shows the specific example of the change procedure of the use radio channel which concerns on 2nd Embodiment. It is a sequence diagram which shows the specific example of the change procedure of the use radio channel which concerns on 3rd Embodiment.
- FIG. 2 shows a configuration example of the point-to-point wireless system according to the present embodiment.
- the point-to-point wireless system according to this embodiment includes point-to-point wireless devices 1 and 2.
- the wireless devices 1 and 2 have antennas 10 and 20, respectively.
- the antennas 10 and 20 are directional antennas.
- the wireless devices 1 and 2 have transceivers (wireless transceivers) 11 and 21, respectively.
- Wireless devices 1 and 2 establish bidirectional point-to-point wireless links 51 and 52 between antennas 10 and 20 by directing directional beams toward each other.
- the radio transceivers 11 and 21 transmit signals bidirectionally between each other via the radio links 51 and 52.
- the wireless link 51 from the wireless device 1 to the wireless device 2 is referred to as “forward link”, and the wireless link 52 from the wireless device 2 to the wireless device 1 is referred to as “reverse link”.
- each of a plurality of radio channels reserved for the forward link 51 and usable in the forward link 51 is referred to as a “forward channel”.
- each of a plurality of radio channels reserved for and usable on the reverse link 52 is referred to as a “reverse channel”.
- the used radio channel of the forward link 51 is selected from among a plurality of forward channels
- the used radio channel of the reverse link 52 is selected from among a plurality of reverse channels.
- the point-to-point wireless system uses Frequency Division Duplexing (FDD) with a fixed frequency interval. Therefore, the used radio channel of the forward link 51 and the used radio channel of the reverse link 52 are separated from each other by a fixed frequency interval.
- the used radio channel of the forward link 51 may be separated from the used radio channel of the reverse link 52 by 2 GHz. That is, each of the plurality of forward channels is associated in advance with one of the plurality of reverse channels according to a fixed frequency interval.
- the radio channel used for the forward link 51 is not determined independently of that of the reverse link 52, but is determined together with that of the reverse link 52 according to a fixed frequency interval.
- the wireless devices 1 and 2 further have controllers 12 and 22, respectively.
- the controllers 12 and 22 are configured to coordinately perform procedures for changing the used radio channel of the forward link 51 and the reverse link 52.
- the controllers 12 and 22 may further perform other controls.
- the controllers 12 and 22 may change the modulation scheme, code rate, etc. to the radio links 51 and 52 to account for changes in propagation conditions due to weather conditions (eg, rain, fog, hail, haze, smoke, or smog).
- Adaptive Modulation and Coding may be performed to change according to quality.
- FIG. 3 is a sequence diagram showing a specific example of the changing procedure of the changing procedure of the used radio channel according to the present embodiment.
- the wireless device 1 detects a decrease in reception quality of the reverse link 52.
- the procedure of changing the used radio channel is typically performed in order to avoid interference that a specific radio channel receives from other radio systems. Therefore, the reception quality monitored in step S101 to trigger the change procedure of the used radio channel may typically be SignalSigntoInterference plus Noise Ratio (SINR).
- SINR SignalSigntoInterference plus Noise Ratio
- SINR SignalSigntoInterference plus Noise Ratio
- the received signal strength (Received Signal Strength Indicator (RSSI)) is also used to distinguish the reverse link 52 line of view from deterioration due to worsening weather conditions or shielding by some structure. May be used.
- step S102 in response to the detection of the degradation of the reception quality of the reverse link 52, the wireless device 1 sends a predetermined notification to the wireless device 2 using the currently used wireless channel of the forward link 51.
- the predetermined notification in step S102 may indicate that an empty channel search is performed in the wireless device 1 (empty channel search notification).
- the predetermined notification in step S102 may indicate that a failure has been detected in the reverse link 52, or may indicate a request for an empty channel search in the wireless device 2. .
- step S103 the wireless device 2 transmits a reception notification (Acknowledgement) in response to the reception of the predetermined notification in step S102.
- the reception notification is transmitted using the currently used radio channel of the reverse link 52. Note that, in a situation where the reception quality of the reverse link 52 is degraded, it is not guaranteed that the reception notification normally reaches the wireless device 1. Therefore, the transmission of the reception notification in step S103 may be omitted.
- both the wireless devices 1 and 2 execute a free channel search. That is, the wireless device 1 searches for an available channel (that is, a clear channel or an unoccupied channel) that can be used on the reverse link 52. On the other hand, the wireless device 2 searches for an available channel (clear channel or unoccupied channel) that can be used in the forward link 51.
- the channel search in step S104A may be started in response to transmission of the predetermined notification in step S102 or in response to elapse of a predetermined standby time from the transmission of the predetermined notification.
- the channel search in step S104B may be started in response to reception of the predetermined notification in step S102 or in response to elapse of a predetermined standby time from reception of the predetermined notification.
- step S105 the radio apparatus 1 determines a new reverse channel to be used as a use radio channel of the reverse link 52 based on the result of the empty reverse channel search in step S104A.
- the result of the empty forward channel search by the wireless device 2 is not considered. This is because it is difficult to normally transmit the result of the empty forward channel search from the wireless device 2 to the wireless device 1 in a situation where the reception quality of the reverse link 52 is degraded.
- the point-to-point wireless system uses FDD with a fixed frequency interval. Therefore, the new reverse channel determined in step S105 is associated with the new forward channel. Then, the change of the used radio channel of the reverse link 52 inevitably causes the change of the used radio channel of the forward link 51. From this point of view, it can be said that in step S105, the radio apparatus 1 determines a combination of the reverse channel and the forward channel to be newly used as the radio channel.
- step S106 the wireless device 1 transmits a channel change notification to the wireless device 2.
- the channel change notification is transmitted using the currently used radio channel of the forward link 51 (that is, before the change). This is because there is a high possibility that the current (before change) used radio channel of the forward link 51 is normally received by the radio apparatus 2. If a new forward channel after the change is used, it is not guaranteed that the channel change notification normally reaches the wireless device 2, and there is a possibility that communication may be disabled in both the forward link 51 and the reverse link 52. is there.
- the channel change notification transmitted in step S106 explicitly or implicitly indicates the new reverse channel determined in step S105.
- the channel change notification may include an identifier that can identify at least one of a new forward channel, a new reverse channel, and a new bidirectional wireless channel combination.
- the forward channel and the reverse channel are associated in advance according to a fixed frequency relationship.
- a new reverse channel identifier implies a new forward channel
- a new forward channel identifier implies a new reverse channel.
- the channel change notification transmitted in step S106 can be used on the reverse link 52 in addition to the new reverse channel in addition to the new reverse channel to be used as the radio channel used for the reverse link 52.
- At least one free reverse channel is shown.
- Each of the at least one empty reverse channel is an empty channel (clear channel or unoccupied channel) found by the empty channel search in step S104A.
- step S107 the wireless device 2 transmits a reception notification (Acknowledgement) in response to the reception of the channel change notification in step S106.
- the reception notification is transmitted using the currently used radio channel of the reverse link 52 (that is, before the change). However, it is not guaranteed that the reception notification normally reaches the wireless device 1. Therefore, as in the case of the reception notification in step S103, the transmission of the reception notification in step S107 may be omitted.
- the wireless devices 1 and 2 both change the bidirectional wireless channel. That is, both the radio apparatuses 1 and 2 change the radio channel used for the reverse link 52 to the new reverse channel determined in step S105. At the same time, both radio devices 1 and 2 change the used radio channel of the forward link 51 to a new forward channel that is pre-associated with a new reverse channel (according to a fixed frequency interval).
- the operation in step S108A may be started in response to the transmission of the change notification in step S106 or in response to the elapse of a predetermined standby time from the transmission of the change notification.
- the operation in step S108B may be started in response to the reception of the change notification in step S106 or in response to the elapse of a predetermined standby time from the reception of the change notification.
- the radio apparatuses 1 and 2 When the reception quality of the new bidirectional use radio channel after the change (that is, the new forward channel and the new reverse channel) is good, the radio apparatuses 1 and 2 perform the change procedure of the use radio channel. You can complete it. For example, the wireless devices 1 and 2 may transmit a notification indicating the completion of the change to each other using the new used radio channel, thereby completing the change procedure of the used radio channel.
- the reception quality in the wireless device 2 of the used wireless channel (new forward channel) of the forward link 51 after the change is not guaranteed at the time when the steps S108A and B are completed.
- the reverse link 52 is in a one-way communication state in which the reverse link 52 cannot be normally used during steps S102 to S108A and B, and thus a new bidirectional radio used for the purpose of returning the reverse link 52 to normal.
- the channel determination (step S105) is performed solely by the wireless device 1 that is the receiving side of the reverse link 52, and the reception quality of the forward link 51 in the wireless device 2 is not considered. Therefore, the wireless device 2 may not be able to receive normally on the new forward channel of the forward link 51.
- steps S109 to S113A and B in FIG. 3 show a further procedure for normalizing the reception state of the forward link 51.
- step S109 the wireless device 2 detects a decrease in reception quality of the forward link 51.
- the reception quality monitored in step S109 may be SINR or a combination of SINR and RSSI.
- the wireless device 2 since a search for an empty forward channel is performed in step S104B, the wireless device 2 has good reception quality of the new forward channel at the time of receiving the change notification in step S106. Can be recognized based on the search result of the empty forward channel. Therefore, the wireless device 2 may immediately determine that the new forward channel is not appropriate without detecting the decrease in the reception quality of the forward link 51 in step S109.
- step S110 the wireless device 2 determines a newer forward channel to be used as the used wireless channel of the forward link 51.
- the wireless device 2 grasps at least one free reverse channel notified from the wireless device 1 by the change notification in step S106. Accordingly, the wireless device 2 determines a new forward channel from at least one forward channel associated with the at least one empty reverse channel (that is, separated by a fixed frequency interval). do it. More specifically, the wireless device 2 grasps an empty forward channel by searching in step S104B. Therefore, the wireless device 2 uses the product set (common part, intersection) of the forward channel set associated with the free reverse channel notified from the wireless device 1 and the free forward channel set obtained by the search in step S104B. ) To determine a new forward channel.
- step S111 the wireless device 2 transmits a channel change notification to the wireless device 1.
- the channel change notification is transmitted using the new reverse channel applied in steps S108A and 108B.
- the channel change notification in step S111 explicitly or implicitly indicates the new forward channel determined in step S110.
- the channel change notification only needs to include an identifier that can specify at least one of a new forward channel, a new reverse channel, and a new bidirectional wireless channel combination.
- the forward channel and the reverse channel are associated in advance according to a fixed frequency relationship.
- a newer reverse channel identifier implies a newer forward channel
- a newer forward channel identifier implies a newer reverse channel.
- step S112 the wireless device 1 transmits a reception notification (Acknowledgement) in response to the reception of the channel change notification in step S111.
- the reception notification is transmitted using the currently used radio channel of the forward link 51 (that is, the new forward channel after being changed in steps S108A and S108).
- transmission of the reception notification in step S112 may be omitted as in the reception notifications in steps S103 and S107.
- the wireless devices 1 and 2 both change the bidirectional wireless channel. That is, both the wireless devices 1 and 2 change the used wireless channel of the forward link 51 to the newer forward channel determined in step S110.
- both radio devices 1 and 2 change the radio channel used by the reverse link 52 to a new forward channel that is pre-associated with a new forward channel (according to a fixed frequency interval).
- the operation in step S113A may be started in response to the reception of the change notification in step S112 or in response to the elapse of a predetermined standby time from the reception of the change notification.
- the operation in step S113B may be started in response to the transmission of the change notification in step S112 or in response to the elapse of a predetermined standby time from the transmission of the change notification.
- the point-to-point wireless devices 1 and 2 use FDD with a fixed frequency interval.
- the wireless device 1 uses the current forward link 51 to create a new reverse channel to be used on the reverse link 52 and at least one other free reverse direction.
- the channel is notified to the wireless device 2.
- the wireless devices 1 and 2 then use the forward link 51 and the reverse link 52 to use the new reverse channel and the new forward channel associated with it (according to the fixed frequency interval). Change both radio channels. This ensures the reachability of the reverse link 52, but the reachability of the forward link 51 may be lost instead.
- the wireless device 2 further updates a new one of the at least one forward channel associated with the at least one free reverse channel notified from the wireless device 1.
- the forward channel is determined and this is notified to the wireless device 1.
- the wireless devices 1 and 2 then use the new forward channel and the new reverse channel associated therewith (according to a fixed frequency interval) to use the forward link 51 and the reverse link 52. Change the wireless channel used.
- the wireless devices 1 and 2 can safely switch the bidirectional wireless channel without using a redundant line for maintenance or control, and can safely switch from a single communication state. Can return.
- the wireless device 2 may notify the wireless device 1 of other unused forward channels in addition to a newer forward channel to be used in the forward link 51. Accordingly, it is possible to cope with a case where a reverse channel associated with a newer forward channel determined by the wireless device 2 (according to a fixed frequency interval) is not appropriate for the wireless device 1. That is, the wireless device 1 is a product set (common part) of the free reverse channel set associated with the free forward channel notified from the wireless device 2 and the free reverse channel set obtained in the search in step S104A. , Intersection), the next newer reverse channel may be determined.
- step S104A and S104B the arrangement of empty channel searches (steps S104A and S104B) shown in FIG. 3 may be changed as appropriate. Variations of the empty channel search arrangement will be described in the following second and third embodiments.
- FIG. 4 is a sequence diagram showing a specific example of a procedure for changing the used radio channel performed by the radio apparatuses 1 and 2 (controllers 12 and 22).
- the arrangement of empty channel search is mainly changed compared to the example of FIG. That is, in the example of FIG. 4, the wireless devices 1 and 2 have a free reverse channel search (step S201A) and a free forward channel search (step S201A) at an arbitrary opportunity before the failure detection of the reverse link 52 (step S202).
- Step S201B) is executed.
- the wireless devices 1 and 2 may perform an empty channel search during the operation stop period scheduled by the operator.
- step S203 the result of the empty reverse channel search in step S201A is used.
- step S208 the result of the empty forward channel search in step S201B is used.
- the wireless devices 1 and 2 can safely switch the bidirectional wireless channel without using a redundant line for maintenance or control, and can safely return from the one-communication state.
- step S203 the radio apparatus 1 preferably performs reception quality confirmation on one reverse channel selected as a new used radio channel of the reverse link 52. This confirmation can be completed in a shorter time compared to an empty channel search over the entire frequency band of the forward channel.
- step S ⁇ b> 208 it is preferable that the wireless device 2 confirms reception quality with respect to one forward channel selected as a new radio channel to be used for the forward link 51.
- FIG. 5 is a sequence diagram showing a specific example of a procedure for changing the used radio channel performed by the radio apparatuses 1 and 2 (controllers 12 and 22).
- the arrangement of empty channel searches is mainly changed compared to the example of FIG. That is, in the example of FIG. 5, the wireless device 2 performs a free forward channel search (step S312) after detecting a failure of the forward link 51 (step S309).
- step S304 the wireless device 1 performs a free reverse channel search.
- the wireless device 2 does not perform a free forward channel search.
- step S310 in response to detecting the degradation of the reception quality of the forward link 51, the wireless device 2 uses the currently used radio channel of the reverse link 52 (that is, after being changed in steps S308A and B).
- the new notification is transmitted to the wireless device 1 using a new reverse channel).
- the predetermined notification in step S310 may indicate that an empty channel search is performed in the wireless device 2 (empty channel search notification).
- the predetermined notification in step S310 may indicate that a failure has been detected in the forward link 51.
- step S311 the wireless device 1 transmits a reception notification (Acknowledgement) in response to the reception of the notification in step S310.
- the reception notification is transmitted using the currently used radio channel of the forward link 51 (that is, the new forward channel after being changed in steps S308A and S308).
- the transmission of the reception notification in step S311 may be omitted.
- step S312 the wireless device 2 searches for a free channel (clear channel or unoccupied channel) that can be used in the forward link 51.
- the channel search in step S312 may be started in response to the transmission of the predetermined notification in step S310 or in response to the elapse of a predetermined waiting time from the transmission of the predetermined notification.
- steps S313 to S316A and B is the same as the processing in steps S110 to S113A and B in FIG.
- step S313 the result of the empty forward channel search in step S312 is used.
- the wireless devices 1 and 2 can safely switch the bidirectional wireless channel without using a redundant line for maintenance or control, and can safely return from the one-communication state.
- the processing related to the change procedure of the used radio channel performed by each of the radio devices 1 and 2 (controllers 12 and 22) described above may be realized using a semiconductor processing device including an Application Specific Integrated Circuit (ASIC).
- ASIC Application Specific Integrated Circuit
- these processes may be realized by causing a computer including at least one processor (eg, a microprocessor, a micro processing unit (MPU), and a central processing unit (CPU)) to execute a program.
- a processor eg, a microprocessor, a micro processing unit (MPU), and a central processing unit (CPU)
- Non-transitory computer readable media include various types of tangible storage media (tangible storage medium). Examples of non-transitory computer-readable media are magnetic recording media (eg flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg magneto-optical discs), CompactComp Disc Read Only Memory (CD-ROM), CD-ROM Includes R, CD-R / W, semiconductor memory (eg mask ROM, Programmable ROM (PROM), Erasable PROM (EPROM), flash ROM, Random Access Memory (RAM)).
- the program may also be supplied to the computer by various types of temporary computer-readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves.
- the temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.
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Abstract
Description
(a)前記逆方向リンクの使用無線チャネルとして使用されるべき新たな逆方向チャネル及び前記新たな逆方向チャネル以外に前記逆方向リンクで使用可能な少なくとも1つの空き逆方向チャネルを明示的又は暗示的に示す第1の通知を、前記第1の無線装置から前記第2の無線装置に送信すること、及び
(b)前記第2の無線装置において、前記新たな逆方向チャネルに対応付けられた新たな順方向チャネルの受信品質が良好でない場合に、前記順方向リンクの使用無線チャネルとして使用されるべき更に新たな順方向チャネルを、前記少なくとも1つの空き逆方向チャネルに対応付けられた少なくとも1つの順方向チャネルの中から決定すること、
を含む。
図2は、本実施形態に係るポイントツーポイント無線システムの構成例を示している。本実施形態のポイントツーポイント無線システムは、ポイントツーポイント無線装置1及び2を含む。無線装置1及び2は、アンテナ10及び20をそれぞれ有する。アンテナ10及び20は、指向性アンテナである。さらに、無線装置1及び2は、送受信機(無線トランシーバ)11及び21をそれぞれ有する。無線装置1及び2は、指向性ビームを互いに向け合うことでアンテナ10及び20の間に双方向のポイントツーポイント無線リンク51及び52を確立する。無線トランシーバ11及び21は、無線リンク51及び52を介してお互いの間で双方向に信号を送信する。
本実施形態は、第1の実施形態で説明された使用無線チャネルの変更手順の変形例を説明する。本実施形態に係るポイントツーポイント無線システムの構成例は、図2と同様である。
本実施形態は、第1の実施形態で説明された使用無線チャネルの変更手順の更なる変形例を説明する。本実施形態に係るポイントツーポイント無線システムの構成例は、図2と同様である。
上述の無線装置1及び2(コントローラ12及び22)の各々によって行われる使用無線チャネルの変更手順に関する処理は、Application Specific Integrated Circuit(ASIC)を含む半導体処理装置を用いて実現されてもよい。また、これらの処理は、少なくとも1つのプロセッサ(e.g. マイクロプロセッサ、Micro Processing Unit(MPU)、Central Processing Unit(CPU))を含むコンピュータにプログラムを実行させることによって実現されてもよい。具体的には、本明細書においてシーケンス図等を用いて説明されたアルゴリズムをコンピュータシステムに行わせるための命令群を含む一つ又は複数のプログラムを作成し、当該プログラムをコンピュータシステムに供給すればよい。
10、20 アンテナ
11、21 送受信機(無線トランシーバ)
12、22 コントローラ
Claims (31)
- 双方向のポイントツーポイント無線通信を行う第1及び第2の無線装置を備え、
前記第1及び前記第2の無線装置は、前記第1の無線装置から前記第2の無線装置に向かう順方向リンク及び前記第2の無線装置から前記第1の無線装置に向かう逆方向リンクの使用無線チャネルの変更手順を協調して行うよう構成され、
前記変更手順は、
(a)前記逆方向リンクの使用無線チャネルとして使用されるべき新たな逆方向チャネル及び前記新たな逆方向チャネル以外に前記逆方向リンクで使用可能な少なくとも1つの空き逆方向チャネルを明示的又は暗示的に示す第1の通知を、前記第1の無線装置から前記第2の無線装置に送信すること、及び
(b)前記第2の無線装置において、前記新たな逆方向チャネルに対応付けられた新たな順方向チャネルの受信品質が良好でない場合に、前記順方向リンクの使用無線チャネルとして使用されるべき更に新たな順方向チャネルを、前記少なくとも1つの空き逆方向チャネルに対応付けられた少なくとも1つの順方向チャネルの中から決定すること、
を備える、ポイントツーポイント無線システム。 - 前記変更手順は、前記第1の通知の送信の後に、前記第1及び第2の無線装置の両方において、前記逆方向リンクの使用無線チャネルを前記新たな逆方向チャネルに変更すると共に、前記順方向リンクの使用無線チャネルを前記新たな逆方向チャネルに前記新たな順方向チャネルに変更することをさらに備える、請求項1に記載のポイントツーポイント無線システム。
- 前記第1の通知は、前記順方向リンクにおいて、前記順方向リンクの現在の使用無線チャネルを用いて送信される、請求項1又は2に記載のポイントツーポイント無線システム。
- 前記変更手順は、
前記更に新たな順方向チャネルを明示的又は暗示的に示す第2の通知を、前記第2の無線装置から前記第1の無線装置に送信すること、及び
前記第2の通知の送信の後に、前記第1及び第2の無線装置の両方において、前記順方向リンクの使用無線チャネルを前記更に新たな順方向チャネルに変更すると共に、前記逆方向リンクの使用無線チャネルを前記更に新たな順方向チャネルに対応付けられた前記少なくとも1つの空き逆方向チャネルのうちの1つに変更すること、
をさらに備える、
請求項1~3のいずれか1項に記載のポイントツーポイント無線システム。 - 前記第2の通知は、前記逆方向リンクにおいて前記新たな逆方向チャネルを用いて送信される、請求項4に記載のポイントツーポイント無線システム。
- 前記第2の通知は、前記更に新たな順方向チャネル以外に前記順方向リンクで使用可能な少なくとも1つの空き順方向チャネルをさらに示す、請求項4又は5に記載のポイントツーポイント無線システム。
- 前記変更手順は、前記第1の無線装置において、前記少なくとも1つの空き順方向チャネルに対応付けられた少なくとも1つの逆方向チャネルの中から次の逆方向チャネルを選択することをさらに備える、請求項6に記載のポイントツーポイント無線システム。
- 前記第1及び第2の無線装置は、固定された周波数間隔を伴うFrequency Division Duplexingを使用して互いに通信し、
前記順方向リンクの使用無線チャネルと前記逆方向リンクの使用無線チャネルは、前記固定された周波数間隔だけ互いに離れている、
請求項1~7のいずれか1項に記載のポイントツーポイント無線システム。 - 前記新たな順方向チャネルは、前記新たな逆方向チャネルに前記固定された周波数間隔に従って対応付けられており、
前記更に新たな順方向チャネルは、前記少なくとも1つの空き逆方向チャネルのうちの1つに前記固定された周波数間隔に従って対応付けられている、
請求項8に記載のポイントツーポイント無線システム。 - 前記変更手順は、
前記第1の通知の送信の前に、前記第1の無線装置において前記逆方向リンクの受信品質の低下を検出したことに応じて、前記第1の無線装置から前記第2の無線装置に第3の通知を送信すること、及び
前記第3の通知の送信の後かつ前記第1の通知の送信の前に、前記第1の無線装置において前記逆方向リンクの空きチャネルの探索を実行し、前記第2の無線装置において前記順方向リンクの空きチャネルの探索を実行すること、
をさらに備える、
請求項1~9のいずれか1項に記載のポイントツーポイント無線システム。 - 前記第1の通知は、前記新たな逆方向チャネル及び前記少なくとも1つの空き逆方向チャネルのそれぞれに対応する無線チャネル組み合わせの識別子を示し、
前記第2の通知は、前記更に新たな順方向チャネルに対応する無線チャネル組み合わせの識別子を示す、
請求項4~7のいずれか1項に記載のポイントツーポイント無線システム。 - ポイントツーポイント無線装置であって、
ポイントツーポイント無線技術により対向装置と通信する無線通信手段と、
前記ポイントツーポイント無線装置から前記対向装置に向かう順方向リンク及び前記対向装置から前記ポイントツーポイント無線装置に向かう逆方向リンクの使用無線チャネルの変更手順を実行する制御手段と、
を備え、
前記変更手順は、前記逆方向リンクの使用無線チャネルとして使用されるべき新たな逆方向チャネル及び前記新たな逆方向チャネル以外に前記逆方向リンクで使用可能な少なくとも1つの空き逆方向チャネルを明示的又は暗示的に示す第1の通知を、前記対向装置に送信することを備える、
ポイントツーポイント無線装置。 - 前記第1の通知は、前記順方向リンクにおいて、前記順方向リンクの現在の使用無線チャネルを用いて送信される、請求項12に記載のポイントツーポイント無線装置。
- 前記変更手順は、前記第1の通知の送信の後に、前記逆方向リンクの使用無線チャネルを前記新たな逆方向チャネルに変更すると共に、前記順方向リンクの使用無線チャネルを前記新たな逆方向チャネルに対応付けられた新たな順方向チャネルに変更することをさらに備える、請求項12又は13に記載のポイントツーポイント無線装置。
- 前記変更手順は、更に新たな順方向チャネルを明示的又は暗示的に示す第2の通知を前記対向装置から受信すること;ここで、前記更に新たな順方向チャネルは、前記新たな逆方向チャネルに対応付けられた新たな順方向チャネルの受信品質が良好でない場合に、前記対向装置において、前記少なくとも1つの空き逆方向チャネルに対応付けられた少なくとも1つの順方向チャネルの中から選択される、をさらに備える請求項13又は14に記載のポイントツーポイント無線装置。
- 前記変更手順は、前記第2の通知の受信の後に、前記順方向リンクの使用無線チャネルを前記更に新たな順方向チャネルに変更すると共に、前記逆方向リンクの使用無線チャネルを前記更に新たな順方向チャネルに対応付けられた前記少なくとも1つの空き逆方向チャネルのうちの1つに変更することをさらに備える、請求項15に記載のポイントツーポイント無線装置。
- 前記第2の通知は、前記逆方向リンクにおいて前記新たな逆方向チャネルを用いて送信される、請求項15又は16記載のポイントツーポイント無線装置。
- 前記第2の通知は、前記更に新たな順方向チャネル以外に前記順方向リンクで使用可能な少なくとも1つの空き順方向チャネルをさらに示す、請求項15~17のいずれか1項に記載のポイントツーポイント無線装置。
- 前記ポイントツーポイント無線装置及び前記対向装置は、固定された周波数間隔を伴うFrequency Division Duplexingを使用して互いに通信し、
前記順方向リンクの使用無線チャネルと前記逆方向リンクの使用無線チャネルは、前記固定された周波数間隔だけ互いに離れている、
請求項12~18のいずれか1項に記載のポイントツーポイント無線装置。 - 前記変更手順は、
前記第1の通知の送信の前に、前記ポイントツーポイント無線装置において前記逆方向リンクの受信品質の低下を検出したことに応じて、前記対向装置に第3の通知を送信すること、及び
前記第3の通知の送信の後かつ前記第1の通知の送信の前に、前記逆方向リンクの空きチャネルの探索を実行すること、
をさらに備える、
請求項12~19のいずれか1項に記載のポイントツーポイント無線装置。 - ポイントツーポイント無線装置であって、
ポイントツーポイント無線技術により対向装置と通信する無線通信手段と、
前記対向装置から前記ポイントツーポイント無線装置に向かう順方向リンク及び前記ポイントツーポイント無線装置から前記対向装置に向かう逆方向リンクの使用無線チャネルの変更手順を実行する制御手段と、
を備え、
前記変更手順は、
(a)前記逆方向リンクの使用無線チャネルとして使用されるべき新たな逆方向チャネル及び前記新たな逆方向チャネル以外に前記逆方向リンクで使用可能な少なくとも1つの空き逆方向チャネルを明示的又は暗示的に示す第1の通知を前記対向装置から受信すること、及び
(b)前記新たな逆方向チャネルに対応付けられた新たな順方向チャネルの受信品質が良好でない場合に、前記少なくとも1つの空き逆方向チャネルに対応付けられた少なくとも1つの順方向チャネルの中から更に新たな順方向チャネルを決定すること、
を備える、
ポイントツーポイント無線装置。 - 前記変更手順は、前記第1の通知の受信の後に、前記逆方向リンクの使用無線チャネルを前記新たな逆方向チャネルに変更すると共に、前記順方向リンクの使用無線チャネルを前記新たな逆方向チャネルに対応付けられた新たな順方向チャネルに変更することをさらに備える、請求項21に記載のポイントツーポイント無線装置。
- 前記第1の通知は、前記順方向リンクにおいて、前記順方向リンクの現在の使用無線チャネルを用いて送信される、請求項21又は22に記載のポイントツーポイント無線装置。
- 前記変更手順は、
前記更に新たな順方向チャネルを明示的又は暗示的に示す第2の通知を前記対向装置に送信すること、及び
前記第2の通知の送信の後に、前記順方向リンクの使用無線チャネルを前記更に新たな順方向チャネルに変更すると共に、前記逆方向リンクの使用無線チャネルを前記更に新たな順方向チャネルに対応付けられた前記少なくとも1つの空き逆方向チャネルのうちの1つに変更すること、
をさらに備える、
請求項21~23のいずれか1項に記載のポイントツーポイント無線装置。 - 前記第2の通知は、前記逆方向リンクにおいて前記新たな逆方向チャネルを用いて送信される、請求項24に記載のポイントツーポイント無線装置。
- 前記第2の通知は、前記更に新たな順方向チャネル以外に前記順方向リンクで使用可能な少なくとも1つの空き順方向チャネルをさらに示す、請求項24又は25に記載のポイントツーポイント無線装置。
- 前記ポイントツーポイント無線装置及び前記対向装置は、固定された周波数間隔を伴うFrequency Division Duplexingを使用して互いに通信し、
前記順方向リンクの使用無線チャネルと前記逆方向リンクの使用無線チャネルは、前記固定された周波数間隔だけ互いに離れている、
請求項21~26のいずれか1項に記載のポイントツーポイント無線装置。 - 前記変更手順は、
前記第1の通知の受信の前に、前記対向装置において前記逆方向リンクの受信品質の低下を検出したことに応じて、前記対向装置から第3の通知を受信すること、及び
前記第3の通知の受信の後かつ前記第1の通知の受信の前に、前記順方向リンクの空きチャネルの探索を実行すること、
をさらに備える、
請求項21~27のいずれか1項に記載のポイントツーポイント無線装置。 - ポイントツーポイント無線装置により行われる通信制御方法であって、
前記ポイントツーポイント無線装置は、前記ポイントツーポイント無線装置から対向装置に向かう順方向リンク及び前記対向装置から前記ポイントツーポイント無線装置に向かう逆方向リンクにおいて、ポイントツーポイント無線技術により前記対向装置と通信するよう構成され、
前記通信制御方法は、(a)前記逆方向リンクの使用無線チャネルとして使用されるべき新たな逆方向チャネル及び前記新たな逆方向チャネル以外に前記逆方向リンクで使用可能な少なくとも1つの空き逆方向チャネルを明示的又は暗示的に示す第1の通知を前記対向装置に送信することを備える、
通信制御方法。 - ポイントツーポイント無線装置により行われる通信制御方法であって、
前記ポイントツーポイント無線装置は、対向装置から前記ポイントツーポイント無線装置に向かう順方向リンク及び前記ポイントツーポイント無線装置から前記対向装置に向かう逆方向リンクにおいて、ポイントツーポイント無線技術により前記対向装置と通信するよう構成され、
前記通信制御方法は、
(a)前記逆方向リンクの使用無線チャネルとして使用されるべき新たな逆方向チャネル及び前記新たな逆方向チャネル以外に前記逆方向リンクで使用可能な少なくとも1つの空き逆方向チャネルを明示的又は暗示的に示す第1の通知を前記対向装置から受信すること、及び
(b)前記新たな逆方向チャネルに対応付けられた新たな順方向チャネルの受信品質が良好でない場合に、前記順方向リンクの使用無線チャネルとして使用されるべき更に新たな順方向チャネルを、前記少なくとも1つの空き逆方向チャネルに対応付けられた少なくとも1つの順方向チャネルの中から決定すること、
を備える、
通信制御方法。 - 請求項29又は30に記載の通信制御方法をコンピュータに行わせるためのプログラムを格納した非一時的なコンピュータ可読媒体。
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- 2015-02-18 US US15/126,051 patent/US10506581B2/en not_active Expired - Fee Related
- 2015-02-18 CN CN201580013740.1A patent/CN106105296A/zh active Pending
- 2015-02-18 WO PCT/JP2015/000741 patent/WO2015141127A1/ja active Application Filing
- 2015-02-18 EP EP15765554.9A patent/EP3122102B1/en not_active Not-in-force
- 2015-02-18 EP EP18213556.6A patent/EP3481117B1/en active Active
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Also Published As
Publication number | Publication date |
---|---|
EP3122102B1 (en) | 2019-02-06 |
MX2016011797A (es) | 2016-12-02 |
CN106105296A (zh) | 2016-11-09 |
EP3481117B1 (en) | 2020-05-27 |
JP2015177498A (ja) | 2015-10-05 |
US10506581B2 (en) | 2019-12-10 |
EP3122102A4 (en) | 2017-11-29 |
EP3122102A1 (en) | 2017-01-25 |
US20170118750A1 (en) | 2017-04-27 |
EP3481117A1 (en) | 2019-05-08 |
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