JP7102278B2

JP7102278B2 - Electronic device and communication method

Info

Publication number: JP7102278B2
Application number: JP2018146109A
Authority: JP
Inventors: 耕司秋田; 民雄河口; 大輔内田
Original assignee: Toshiba Corp
Current assignee: Toshiba Corp
Priority date: 2018-08-02
Filing date: 2018-08-02
Publication date: 2022-07-19
Anticipated expiration: 2038-08-02
Also published as: JP2020022120A

Description

本発明の実施形態は、無線による全二重通信をする電子装置及び通信方法に関する。 An embodiment of the present invention relates to an electronic device and a communication method for wireless full-duplex communication.

従来の無線通信では、送信信号が受信信号に混入するのを避けるため、送信信号と受信信号とがなんらかの方法で分離されている。このような分離の手法として、例えば送信信号と受信信号とを時分割するＴＤＤ（ＴｉｍｅＤｉｖｉｓｉｏｎＤｕｐｌｅｘｉｎｇ）方式が知られている。また、分離の別の手法として、例えば送信信号と受信信号とを周波数分割するＦＤＤ（ＦｒｅｑｕｅｎｃｙＤｉｖｉｓｉｏｎＤｕｐｌｅｘｉｎｇ）が知られている。 In conventional wireless communication, the transmission signal and the reception signal are separated by some method in order to prevent the transmission signal from being mixed with the reception signal. As such a separation method, for example, a TDD (Time Division Duplexing) method in which a transmission signal and a reception signal are time-divisioned is known. Further, as another method of separation, for example, FDD (Frequency Division Duplexing) in which the transmission signal and the reception signal are frequency-divisioned is known.

近年、無線通信においても、送信信号と受信信号とを時間軸でも周波数軸でも分けない、すなわち同じ時間帯に同じ周波数帯を使って送信と受信を行う全二重通信（Ｆｕｌｌ－Ｄｕｐｌｅｘ，Ｉｎ－ＢａｎｄＦｕｌｌ－Ｄｕｐｌｅｘ）が行われつつある。全二重通信では、送信信号が受信信号に混入してしまう。送信信号が受信信号に混入したとき、一般的には、電子装置は、遠方に位置する通信相手から到来した受信信号よりも、自らが送信した送信信号の方を大きい信号電力で観測する。このため、送信信号に埋没した受信信号を電子装置において取り出すことは困難である。これに対して、電子装置が自ら送信した送信信号が電子装置においては既知であることを利用して、受信信号に混入した送信信号による干渉信号をキャンセルすることで、送信信号に埋没した受信信号を取り出す技術が知られている。このようなキャンセル技術により、無線通信においても全二重通信が可能となる。 In recent years, even in wireless communication, the transmission signal and the reception signal are not separated on the time axis or the frequency axis, that is, full-duplex communication (Full-Duplex, In-) in which transmission and reception are performed using the same frequency band in the same time zone. Band Full-Duplex) is being carried out. In full-duplex communication, the transmitted signal is mixed with the received signal. When the transmitted signal is mixed with the received signal, the electronic device generally observes the transmitted signal transmitted by itself with a larger signal power than the received signal arriving from a distant communication partner. Therefore, it is difficult for the electronic device to take out the received signal embedded in the transmitted signal. On the other hand, by utilizing the fact that the transmission signal transmitted by the electronic device itself is known in the electronic device, the interference signal due to the transmission signal mixed in the reception signal is canceled, so that the reception signal embedded in the transmission signal is buried. The technique of taking out the signal is known. With such a canceling technique, full-duplex communication becomes possible even in wireless communication.

特表２０１７－５１５３９９号公報Special Table 2017-515399

キャンセル技術には性能的な制限がある。つまり、ある一定以上に干渉信号の電力が大きくなってしまうと干渉信号をキャンセルしきれないことがある。この場合、受信信号の通信品質は低下してしまう。ここでいう通信品質は、無線伝送される信号に含まれる誤りの割合、すなわち誤り率特性を含む。一般的に、伝送速度が速いほど誤り率は高くなる傾向があるため、単に通信品質を良くしたいだけであれば、伝送速度を低下させればよい。しかしながら、伝送速度が伝送したいデータ量を下回ってしまうと、伝送したいデータを十分に伝送できないという状況になってしまう。 Cancellation techniques have performance limitations. That is, if the power of the interference signal becomes larger than a certain level, the interference signal may not be completely canceled. In this case, the communication quality of the received signal deteriorates. The communication quality referred to here includes the rate of errors contained in the wirelessly transmitted signal, that is, the error rate characteristic. Generally, the higher the transmission speed, the higher the error rate tends to be. Therefore, if the communication quality is simply to be improved, the transmission speed may be lowered. However, if the transmission speed is lower than the amount of data to be transmitted, the data to be transmitted cannot be sufficiently transmitted.

本実施形態は、無線による全二重通信をする電子装置において、送受双方の通信品質を向上させることができる電子装置及び通信方法を提供することを目的とする。 An object of the present embodiment is to provide an electronic device and a communication method capable of improving the communication quality of both transmission and reception in an electronic device that performs full-duplex communication wirelessly.

実施形態の電子装置は、送信部と、受信部と、制御部とを備える。送信部は、送信周波数帯及び送信時間帯で送信信号を送信する。受信部は、送信周波数帯と少なくとも一部が重なっている受信周波数帯及び送信時間帯と少なくとも一部が重なっている受信時間帯で受信信号を受信する。制御部は、送信部の送信トラフィックを検出し、受信部の受信トラフィックを検出し、送信トラフィックと受信トラフィックとを用いて、送信部によって送信される前記送信信号の少なくとも送信電力を制御する。制御部は、受信トラフィックよりも送信トラフィックが小さい場合に、送信部によって送信される送信信号の送信電力を下げる。 The electronic device of the embodiment includes a transmitting unit, a receiving unit, and a control unit. The transmission unit transmits the transmission signal in the transmission frequency band and the transmission time zone. The receiving unit receives the received signal in a reception frequency band that at least partially overlaps the transmission frequency band and a reception time zone that at least partially overlaps the transmission time zone. The control unit detects the transmission traffic of the transmission unit, detects the reception traffic of the reception unit, and controls at least the transmission power of the transmission signal transmitted by the transmission unit using the transmission traffic and the reception traffic. The control unit reduces the transmission power of the transmission signal transmitted by the transmission unit when the transmission traffic is smaller than the reception traffic.

図１は、電子装置の構成例を示す図である。FIG. 1 is a diagram showing a configuration example of an electronic device. 図２は、全二重通信における干渉について説明するための図である。FIG. 2 is a diagram for explaining interference in full-duplex communication. 図３は、通信品質が維持される条件について説明するための図である。FIG. 3 is a diagram for explaining conditions for maintaining communication quality. 図４は、通信品質が維持される条件について説明するための図である。FIG. 4 is a diagram for explaining conditions for maintaining communication quality. 図５は、通信品質が維持される条件について説明するための図である。FIG. 5 is a diagram for explaining conditions for maintaining communication quality. 図６は、第１の実施形態における電子装置の動作を示すフローチャートである。FIG. 6 is a flowchart showing the operation of the electronic device according to the first embodiment. 図７Ａは、第１の実施形態における電子装置の動作を説明するための図である。FIG. 7A is a diagram for explaining the operation of the electronic device according to the first embodiment. 図７Ｂは、第１の実施形態における電子装置の動作を説明するための図である。FIG. 7B is a diagram for explaining the operation of the electronic device according to the first embodiment. 図８は、第２の実施形態における電子装置の動作を示すフローチャートである。FIG. 8 is a flowchart showing the operation of the electronic device according to the second embodiment. 図９Ａは、第２の実施形態における電子装置の動作を説明するための図である。FIG. 9A is a diagram for explaining the operation of the electronic device in the second embodiment. 図９Ｂは、第２の実施形態における電子装置の動作を説明するための図である。FIG. 9B is a diagram for explaining the operation of the electronic device in the second embodiment. 図１０は、第３の実施形態における電子装置の動作を示すフローチャートである。FIG. 10 is a flowchart showing the operation of the electronic device according to the third embodiment. 図１１は、第３の実施形態の変形例における電子装置の動作を示すフローチャートである。FIG. 11 is a flowchart showing the operation of the electronic device in the modified example of the third embodiment. 図１２Ａは、第３の実施形態の変形例における電子装置の動作を説明するための図である。FIG. 12A is a diagram for explaining the operation of the electronic device in the modified example of the third embodiment. 図１２Ｂは、第３の実施形態の変形例における電子装置の動作を説明するための図である。FIG. 12B is a diagram for explaining the operation of the electronic device in the modified example of the third embodiment. 図１３Ａは、第３の実施形態の変形例における電子装置の動作を説明するための図である。FIG. 13A is a diagram for explaining the operation of the electronic device in the modified example of the third embodiment. 図１３Ｂは、第３の実施形態の変形例における電子装置の動作を説明するための図である。FIG. 13B is a diagram for explaining the operation of the electronic device in the modified example of the third embodiment. 図１４は、時間方向に部分的にヌル信号を含む送信信号及び受信信号の例を示す図である。FIG. 14 is a diagram showing an example of a transmission signal and a reception signal including a null signal partially in the time direction. 図１５は、周波数方向に部分的にヌル信号を含む送信信号及び受信信号の例を示す図である。FIG. 15 is a diagram showing an example of a transmission signal and a reception signal including a null signal partially in the frequency direction.

以下、図面を参照しながら実施形態について詳細に説明する。
［第１の実施形態］
第１の実施形態にかかわる電子装置について説明する。図１は、各実施形態に係る電子装置の構成例を示す図である。電子装置１は、全二重通信をする電子装置であって、無線回路１０と、無線処理部２０と、処理部３０とを有している。以下で説明する全二重通信は、送信信号の送信周波数帯と受信信号の受信周波数帯の少なくとも一部が重なっており、さらに、送信信号の送信時間帯と受信信号の受信時間帯の少なくとも一部が重なっている通信のことを言う。 Hereinafter, embodiments will be described in detail with reference to the drawings.
[First Embodiment]
The electronic device according to the first embodiment will be described. FIG. 1 is a diagram showing a configuration example of an electronic device according to each embodiment. The electronic device 1 is an electronic device that performs full-duplex communication, and includes a wireless circuit 10, a wireless processing unit 20, and a processing unit 30. In the full-duplex communication described below, at least a part of the transmission frequency band of the transmission signal and the reception frequency band of the reception signal overlaps, and at least one of the transmission time zone of the transmission signal and the reception time band of the reception signal. It refers to communication in which parts overlap.

無線回路１０は、送信アンテナ１１と、送信回路１２と、受信アンテナ１３と、受信回路１４と、干渉検出回路１５とを有している。無線回路１０は、単一の回路であってもよいし、複数の回路群で構成されていてもよい。 The wireless circuit 10 includes a transmitting antenna 11, a transmitting circuit 12, a receiving antenna 13, a receiving circuit 14, and an interference detecting circuit 15. The wireless circuit 10 may be a single circuit or may be composed of a plurality of circuit groups.

送信アンテナ１１は、電子装置１の通信相手に対して送信信号を送信するためのアンテナである。送信アンテナ１１は、無線信号を送信できるものであれば特に限定されない。送信回路１２は、処理部３０から伝送されたデータに対して必要な送信処理を施して送信信号を生成する。送信回路１２は、変調回路、フィルタ、増幅回路等を含む。 The transmission antenna 11 is an antenna for transmitting a transmission signal to the communication partner of the electronic device 1. The transmitting antenna 11 is not particularly limited as long as it can transmit a wireless signal. The transmission circuit 12 performs necessary transmission processing on the data transmitted from the processing unit 30 to generate a transmission signal. The transmission circuit 12 includes a modulation circuit, a filter, an amplifier circuit, and the like.

受信アンテナ１３は、電子装置１の通信相手から受信信号を受信するためのアンテナである。受信アンテナ１３は、無線信号を受信できるものであれば特に限定されない。受信回路１４は、受信アンテナ１３で受信された受信信号に対して必要な受信処理を施してデータを取り出し、取り出したデータを処理部３０に出力する。受信回路１４は、復調回路、フィルタ、増幅回路等を含む。 The receiving antenna 13 is an antenna for receiving a received signal from the communication partner of the electronic device 1. The receiving antenna 13 is not particularly limited as long as it can receive a radio signal. The receiving circuit 14 performs necessary reception processing on the received signal received by the receiving antenna 13, extracts data, and outputs the extracted data to the processing unit 30. The receiving circuit 14 includes a demodulation circuit, a filter, an amplifier circuit, and the like.

干渉検出回路１５は、受信信号に混入している干渉信号の干渉レベルを検出する。干渉信号は、例えば受信信号に混入される送信信号である。例えば、干渉検出回路１５は、受信信号に混入している送信信号の電力を干渉レベルとして検出する。例えば、干渉検出回路１５は、送信信号に含まれている干渉信号を表す既知信号の情報を参照することができるように構成されている。このとき、干渉検出回路１５は、例えば受信信号と既知信号との相関演算処理によって受信信号に混入している既知信号を特定し、特定した既知信号の電力を干渉レベルとして検出してよい。また、例えば、送信回路１２で送信される送信信号が干渉検出回路１５に入力されるように電子装置１が構成されているのであれば、干渉検出回路１５は、送信信号と受信信号との相関演算処理によって受信信号に混入している送信信号を特定し、特定した送信信号の電力を干渉レベルとして検出してもよい。既知信号を用いる場合であっても送信信号を用いる場合であっても、干渉検出回路１５は、例えば、受信信号の電力が小さい時間区間又は周波数区間、すなわち干渉信号の影響が相対的に大きい時間区間又は周波数区間において干渉レベルを検出してもよい。この場合、他の時間区間又は周波数区間において干渉レベルを検出するよりも、干渉レベルの検出精度は高まる。 The interference detection circuit 15 detects the interference level of the interference signal mixed in the received signal. The interference signal is, for example, a transmission signal mixed with the reception signal. For example, the interference detection circuit 15 detects the power of the transmission signal mixed in the reception signal as the interference level. For example, the interference detection circuit 15 is configured so that information on a known signal representing an interference signal included in the transmission signal can be referred to. At this time, the interference detection circuit 15 may identify a known signal mixed in the received signal by, for example, a correlation calculation process between the received signal and the known signal, and detect the power of the identified known signal as the interference level. Further, for example, if the electronic device 1 is configured so that the transmission signal transmitted by the transmission circuit 12 is input to the interference detection circuit 15, the interference detection circuit 15 correlates with the transmission signal and the reception signal. A transmission signal mixed in the received signal may be specified by arithmetic processing, and the power of the specified transmission signal may be detected as an interference level. Regardless of whether a known signal is used or a transmitted signal is used, the interference detection circuit 15 is used, for example, in a time section or frequency section in which the power of the received signal is low, that is, a time in which the influence of the interference signal is relatively large. The interference level may be detected in the interval or frequency interval. In this case, the detection accuracy of the interference level is higher than that of detecting the interference level in another time interval or frequency interval.

ここで、送信回路１２、受信回路１４及び干渉検出回路１５は必ずしもハードウェアによって構成されている必要はない。送信回路１２、受信回路１４及び干渉検出回路１５の一部又は全部はソフトウェアによって構成されてもよい。また、送信回路１２、受信回路１４及び干渉検出回路１５は、無線処理部２０に設けられていてもよい。 Here, the transmission circuit 12, the reception circuit 14, and the interference detection circuit 15 do not necessarily have to be configured by hardware. A part or all of the transmission circuit 12, the reception circuit 14, and the interference detection circuit 15 may be configured by software. Further, the transmission circuit 12, the reception circuit 14, and the interference detection circuit 15 may be provided in the radio processing unit 20.

また、受信回路１４は、受信信号に混入される干渉信号をキャンセルするキャンセラを備えていてもよい。受信回路１４が干渉信号のキャンセラを備えている場合、受信回路１４は、例えば送信回路１２から干渉信号としての送信信号を取得するように構成されている。または、受信回路１４は、干渉信号を特定するための情報を送信回路１２から取得するように構成されていてもよい。また、受信回路１４は、干渉検出回路１５から干渉信号を特定するための情報を取得するように構成されていてもよい。 Further, the receiving circuit 14 may include a canceller that cancels the interference signal mixed in the received signal. When the receiving circuit 14 includes a canceller for an interference signal, the receiving circuit 14 is configured to acquire a transmission signal as an interference signal from, for example, the transmission circuit 12. Alternatively, the receiving circuit 14 may be configured to acquire information for identifying the interference signal from the transmitting circuit 12. Further, the receiving circuit 14 may be configured to acquire information for identifying an interference signal from the interference detecting circuit 15.

無線処理部２０は、無線回路１０の動作を制御する。無線処理部２０は、送信制御部２１と、受信制御部２２と、送信トラフィック検出部２３と、受信トラフィック検出部２４とを有している。 The wireless processing unit 20 controls the operation of the wireless circuit 10. The wireless processing unit 20 includes a transmission control unit 21, a reception control unit 22, a transmission traffic detection unit 23, and a reception traffic detection unit 24.

送信制御部２１は、送信回路１２の動作を制御する。例えば、送信制御部２１は、送信回路１２による送信信号の送信電力及び送信速度を制御する。受信制御部２２は、送信回路１２の動作を制御する。例えば、受信制御部２２は、受信回路１４における受信信号の受信速度を制御する。 The transmission control unit 21 controls the operation of the transmission circuit 12. For example, the transmission control unit 21 controls the transmission power and transmission speed of the transmission signal by the transmission circuit 12. The reception control unit 22 controls the operation of the transmission circuit 12. For example, the reception control unit 22 controls the reception speed of the reception signal in the reception circuit 14.

送信トラフィック検出部２３は、送信トラフィックを検出する。送信トラフィックは、通信相手に送信されるデータに関する情報であればよく、例えば、データ量、サービス品質（ＱｏＳ）、スループット、遅延量、優先度等の１以上に関する情報であって、今後送信が予定されるある期間内の値、過去のある期間内の値等に基づいて定められてもよく、統計処理により定められてもよく、それらの分布や割合に応じて定められてもよい。例えば、送信トラフィック検出部２３は、通信相手に送信される送信信号に含まれる予定のデータのデータ量、今現在送っているデータのデータ量又は近い過去に送ったデータのデータ量を送信トラフィックとして検出する。また、送信トラフィック検出部２３は、送信の際のサービス品質（ＱｏＳ）を送信トラフィックとして検出してもよい。送信の際のＱｏＳは、例えば送信される予定のデータのスループット、遅延量及び優先度といった量を含んでいてよい。受信トラフィック検出部２４は、受信トラフィックを検出する。例えば、受信トラフィック検出部２４は、通信相手から受信される受信信号に含まれる予定のデータのデータ量、今現在受信しているデータのデータ量又は近い過去に受信したデータのデータ量を受信トラフィックとして検出する。受信トラフィックは、通信相手から受信されるデータに関する情報であればよく、例えば、データ量、サービス品質（ＱｏＳ）、スループット、遅延量、優先度等の１以上に関する情報であって、今後受信が予定されるある期間内の値、過去のある期間内の値等に基づいて定められてもよく、統計処理により定められてもよく、それらの分布や割合に応じて定められてもよい。また、受信トラフィック検出部２４は、例えば通信相手から送信トラフィックを通知してもらい、この通信相手から通知された送信トラフィックを受信トラフィックとして検出してもよい。また、受信トラフィック検出部２４は、受信の際のサービス品質（ＱｏＳ）を受信トラフィックとして検出してもよい。受信の際のＱｏＳは、例えば受信される予定のデータのスループット、遅延量及び優先度といった量を含んでいてよい。 The transmission traffic detection unit 23 detects the transmission traffic. The transmitted traffic may be information related to data transmitted to the communication partner, for example, information related to one or more such as data amount, quality of service (QoS), throughput, delay amount, priority, etc., and will be transmitted in the future. It may be determined based on the value within a certain period to be performed, the value within a certain period in the past, etc., it may be determined by statistical processing, or it may be determined according to their distribution and ratio. For example, the transmission traffic detection unit 23 uses the amount of data to be included in the transmission signal transmitted to the communication partner, the amount of data currently being sent, or the amount of data sent in the near past as transmission traffic. To detect. Further, the transmission traffic detection unit 23 may detect the quality of service (QoS) at the time of transmission as transmission traffic. The QoS at the time of transmission may include, for example, an amount such as a throughput, a delay amount, and a priority of the data to be transmitted. The received traffic detection unit 24 detects the received traffic. For example, the received traffic detection unit 24 receives the data amount of the data to be included in the received signal received from the communication partner, the data amount of the data currently received, or the data amount of the data received in the near past. Detect as. The received traffic may be information about data received from the communication partner, for example, information about one or more such as data amount, quality of service (QoS), throughput, delay amount, priority, etc., and will be received in the future. It may be determined based on the value within a certain period to be performed, the value within a certain period in the past, etc., it may be determined by statistical processing, or it may be determined according to their distribution and ratio. Further, the received traffic detection unit 24 may, for example, have a communication partner notify the transmission traffic and detect the transmission traffic notified from the communication partner as the reception traffic. Further, the received traffic detection unit 24 may detect the quality of service (QoS) at the time of reception as the received traffic. The QoS at the time of reception may include, for example, an amount such as a throughput, a delay amount, and a priority of the data to be received.

ここで、無線処理部２０は、例えばＣＰＵ、ＡＳＩＣ、ＦＰＧＡ又はＤＳＰといったデジタル信号処理器を有して送信制御部２１と、受信制御部２２と、送信トラフィック検出部２３と、受信トラフィック検出部２４との動作を行ってもよい。また、無線処理部２０は、送信制御部２１と、受信制御部２２と、送信トラフィック検出部２３と、受信トラフィック検出部２４として動作する電気回路を備えていてもよい。さらに、無線処理部２０は、ＲＯＭ及びＲＡＭといったメモリを有していてもよい。また、無線処理部２０は、複数のＣＰＵ等を有してもよいし、複数のメモリを有していてもよい。 Here, the wireless processing unit 20 has a digital signal processor such as a CPU, ASIC, FPGA, or DSP, and has a transmission control unit 21, a reception control unit 22, a transmission traffic detection unit 23, and a reception traffic detection unit 24. You may perform the operation with. Further, the wireless processing unit 20 may include an electric circuit that operates as a transmission control unit 21, a reception control unit 22, a transmission traffic detection unit 23, and a reception traffic detection unit 24. Further, the wireless processing unit 20 may have memories such as ROM and RAM. Further, the wireless processing unit 20 may have a plurality of CPUs and the like, or may have a plurality of memories.

処理部３０は、送信信号として送信されるデータを生成する。また、処理部３０は、受信信号から取得されるデータを用いて各種の処理をする。処理部３０は、例えばＣＰＵ、ＡＳＩＣ、ＦＰＧＡ又はＤＳＰといったデジタル信号処理器を有している。処理部３０は、ＲＯＭ及びＲＡＭといったメモリを有していてもよい。また、処理部３０は、複数のＣＰＵ等を有してもよいし、複数のメモリを有していてもよい。また、処理部３０は、無線処理部２０を含んでいてもよい。 The processing unit 30 generates data to be transmitted as a transmission signal. In addition, the processing unit 30 performs various processes using the data acquired from the received signal. The processing unit 30 has a digital signal processor such as a CPU, an ASIC, an FPGA or a DSP. The processing unit 30 may have memories such as ROM and RAM. Further, the processing unit 30 may have a plurality of CPUs and the like, or may have a plurality of memories. Further, the processing unit 30 may include a wireless processing unit 20.

次に、電子装置１の動作を説明する。まず、図２を用いて、全二重通信における干渉について説明する。図２では、電子装置１ａと電子装置１ｂとの相互通信の例が示されている。電子装置１ａと電子装置１ｂとは、図１で示した電子装置１と同様の構成を有していてよい。また、電子装置１ａと電子装置１ｂの一方だけ、例えば電子装置１ａが図１で示した電子装置１と同様の構成を有していてもよい。 Next, the operation of the electronic device 1 will be described. First, interference in full-duplex communication will be described with reference to FIG. FIG. 2 shows an example of mutual communication between the electronic device 1a and the electronic device 1b. The electronic device 1a and the electronic device 1b may have the same configuration as the electronic device 1 shown in FIG. Further, only one of the electronic device 1a and the electronic device 1b, for example, the electronic device 1a may have the same configuration as the electronic device 1 shown in FIG.

図２において、電子装置１ａから電子装置１ｂへは送信信号２０１が送信される。一方、電子装置１ｂから電子装置１ａへは送信信号２０２が送信される。前述したように、全二重通信では送信信号の送信周波数帯と受信信号の受信周波数帯の少なくとも一部が重なっており、さらに、送信信号の送信時間帯と受信信号の受信時間帯の少なくとも一部が重なっている。このため、電子装置１ａからの送信信号２０１が電子装置１ａの受信信号（すなわち送信信号２０２）の干渉信号となり得る。干渉信号は、例えば電子装置１ａの外部の何らかの物体３０１に反射することで送信信号２０２に混入される動的干渉信号２０３を含む。また、干渉信号は、電子装置１ａの送信アンテナ１１から送信された送信信号２０１が直接的に受信アンテナ１３で受信されて干渉信号となったり、電子装置１ａの内部で生成された送信信号２０１が受信回路１４等に混入して干渉信号となったりする静的干渉信号２０４を含む。このような干渉信号は、電子装置１ｂにおいても発生し得る。つまり、電子装置１ｂからの送信信号２０２は、電子装置１ａに対する動的干渉信号２０５になったり、静的干渉信号２０６になったりし得る。 In FIG. 2, the transmission signal 201 is transmitted from the electronic device 1a to the electronic device 1b. On the other hand, the transmission signal 202 is transmitted from the electronic device 1b to the electronic device 1a. As described above, in full-duplex communication, at least a part of the transmission frequency band of the transmission signal and the reception frequency band of the reception signal overlap, and further, at least one of the transmission time zone of the transmission signal and the reception time band of the reception signal. The parts overlap. Therefore, the transmission signal 201 from the electronic device 1a can be an interference signal of the reception signal (that is, the transmission signal 202) of the electronic device 1a. The interference signal includes, for example, a dynamic interference signal 203 mixed in the transmission signal 202 by being reflected by some object 301 outside the electronic device 1a. Further, as the interference signal, the transmission signal 201 transmitted from the transmission antenna 11 of the electronic device 1a is directly received by the reception antenna 13 to become an interference signal, or the transmission signal 201 generated inside the electronic device 1a is used. The static interference signal 204 which is mixed in the receiving circuit 14 or the like and becomes an interference signal is included. Such an interference signal can also be generated in the electronic device 1b. That is, the transmission signal 202 from the electronic device 1b can be a dynamic interference signal 205 or a static interference signal 206 with respect to the electronic device 1a.

静的干渉信号２０４及び静的干渉信号２０６は、干渉信号の中でも静的な成分である。したがって、静的干渉信号２０４及び静的干渉信号２０６のそれぞれの干渉レベルについては、予めある程度見積もっておくことができる。このため、静的干渉信号２０４及び静的干渉信号２０６についてはこれらを十分なレベルに低減するキャンセラを電子装置１ａ及び電子装置１ｂのそれぞれに持たせることができる。その一方で、動的干渉信号２０３及び動的干渉信号２０５は、物体３０１の位置又は向きによって送信信号２０１及び２０２の反射の仕方が変わることで変化し得る。このため、動的干渉信号２０３及び動的干渉信号２０５については、干渉レベルがある一定以上となってしまうとキャンセラではそれらの干渉信号の影響をキャンセルしきれなくなる。干渉信号の影響をキャンセルしきれないと通信品質は劣化してしまう。 The static interference signal 204 and the static interference signal 206 are static components among the interference signals. Therefore, the interference levels of the static interference signal 204 and the static interference signal 206 can be estimated to some extent in advance. Therefore, for the static interference signal 204 and the static interference signal 206, each of the electronic device 1a and the electronic device 1b can be provided with a canceller that reduces these to a sufficient level. On the other hand, the dynamic interference signal 203 and the dynamic interference signal 205 can be changed by changing the reflection method of the transmission signals 201 and 202 depending on the position or orientation of the object 301. Therefore, with respect to the dynamic interference signal 203 and the dynamic interference signal 205, when the interference level exceeds a certain level, the canceller cannot completely cancel the influence of the interference signals. If the influence of the interference signal cannot be completely canceled, the communication quality will deteriorate.

図３、図４及び図５は、通信品質が維持される条件について説明するための図である。ノイズと干渉の電力の合計に対する、所望の信号電力の比率によって通信品質が変化する。この比率はＳＩＮＲ（ＳｉｇｎａｌｔｏＩｎｔｅｒｆｅｒｅｎｃｅａｎｄＮｏｉｓｅＲａｔｉｏ）と呼ばれる。また同様に、信号電力とノイズ電力の比率はＳＮＲ（ＳｉｇｎａｌｔｏＮｏｉｓｅＲａｔｉｏ）、信号電力と干渉電力の比率はＳＩＲ（ＳｉｇｎａｌｔｏＩｎｔｅｒｆｅｒｅｎｃｅＲａｔｉｏ）と呼ばれる。図３、図４、図５には、例えば電子装置１ａの送信信号の信号電力と、ＳＩＮＲ、ＳＮＲ、ＳＩＲとをそれぞれ示した例が示されている。図３、図４、図５の横軸は対数で表される電力軸である。 3, FIG. 4 and FIG. 5 are diagrams for explaining conditions for maintaining communication quality. The communication quality changes depending on the ratio of the desired signal power to the total power of noise and interference. This ratio is called SINR (Signal to Interference and Noise Ratio). Similarly, the ratio of signal power to noise power is called SNR (Signal to Noise Ratio), and the ratio of signal power to interference power is called SIR (Signal to Interference Ratio). 3, FIG. 4, and FIG. 5 show examples showing, for example, the signal power of the transmission signal of the electronic device 1a and SINR, SNR, and SIR, respectively. The horizontal axes of FIGS. 3, 4, and 5 are logarithmic power axes.

図３に示すように、干渉電力がノイズ電力よりも十分に低く抑えられている場合、ノイズ電力と干渉電力の合計値はノイズ電力と概ね等しい。このとき、ＳＩＮＲとＳＮＲはほとんど同じ値になる。このような場合は、通信品質は干渉の影響をほとんど受けないと言うことができる。 As shown in FIG. 3, when the interference power is suppressed to be sufficiently lower than the noise power, the total value of the noise power and the interference power is substantially equal to the noise power. At this time, SINR and SNR have almost the same value. In such a case, it can be said that the communication quality is hardly affected by the interference.

一方、図４に示すように、干渉電力が増加すると干渉の分を無視することができなくなる。この場合、ＳＩＮＲは干渉電力の分だけ劣化し、通信品質は劣化する。図４に示したような状況で通信品質を改善するためには、例えば送信信号の電力を減らせばよい。送信信号の電力が減ることで、送信信号から発生している干渉信号の電力も減少する。したがって、受信信号におけるＳＩＮＲが改善し、通信品質が改善される。ただし、送信信号の電力が減ったことにより、無線通信の相手にとっては図５に示すように受信信号の信号電力が減少し、ＳＩＮＲが低下することになる。その結果、無線通信の相手でも元と同じ通信品質を維持しようとすると通信相手の受信信号の伝送速度を落とす必要が生じる。 On the other hand, as shown in FIG. 4, when the interference power increases, the amount of interference cannot be ignored. In this case, the SINR deteriorates by the amount of the interference power, and the communication quality deteriorates. In order to improve the communication quality in the situation shown in FIG. 4, for example, the power of the transmission signal may be reduced. As the power of the transmission signal is reduced, the power of the interference signal generated from the transmission signal is also reduced. Therefore, the SINR in the received signal is improved, and the communication quality is improved. However, since the power of the transmission signal is reduced, the signal power of the reception signal is reduced and the SINR is lowered for the other party of the wireless communication as shown in FIG. As a result, if the wireless communication partner tries to maintain the same communication quality as the original, it becomes necessary to reduce the transmission speed of the received signal of the communication partner.

第１の実施形態においては、無線処理部２０は、送信トラフィックと受信トラフィックとを用いて無線送信する信号の少なくとも送信電力を制御し、さらに必要に応じて伝送速度を制御する。干渉レベルがある閾値以上となって受信の通信品質に影響を与えるレベルとなった場合に、無線処理部２０は、例えば送信電力を低減させることで干渉レベルを閾値未満まで低下させる。これにより、受信信号の受信速度を低下させることなく受信の通信品質を向上させることが可能である。前述したように、送信電力の低下に伴って通信相手の受信のＳＩＮＲが低下する可能性がある。したがって、無線処理部２０は、例えば、通信相手の受信のＳＩＮＲの低下に応じて自身の送信信号の送信速度、つまり通信相手の受信信号の受信速度を低減させる。 In the first embodiment, the radio processing unit 20 controls at least the transmission power of the signal to be wirelessly transmitted by using the transmission traffic and the reception traffic, and further controls the transmission speed if necessary. When the interference level becomes equal to or higher than a certain threshold value and affects the communication quality of reception, the wireless processing unit 20 lowers the interference level to less than the threshold value by, for example, reducing the transmission power. This makes it possible to improve the communication quality of reception without reducing the reception speed of the received signal. As described above, the SINR of the reception of the communication partner may decrease as the transmission power decreases. Therefore, for example, the wireless processing unit 20 reduces the transmission speed of its own transmission signal, that is, the reception speed of the reception signal of the communication partner, in accordance with the decrease in the SINR of the reception of the communication partner.

図６は、第１の実施形態における電子装置の動作を示すフローチャートである。図６では、図示を省略しているが、無線処理部２０は、図６の動作中に処理部３０から送られてきたデータを送信信号として送るように送信回路１２を制御することも行っている。また、図６の動作とは別に、無線処理部２０は、受信回路１４から送られてきたデータを処理部３０に送ることを行っている。 FIG. 6 is a flowchart showing the operation of the electronic device according to the first embodiment. Although not shown in FIG. 6, the wireless processing unit 20 also controls the transmission circuit 12 so as to transmit the data sent from the processing unit 30 as a transmission signal during the operation of FIG. There is. Further, apart from the operation of FIG. 6, the wireless processing unit 20 sends the data sent from the receiving circuit 14 to the processing unit 30.

ステップＳ１において、無線処理部２０は、干渉レベルが閾値以上であるか否かを判定する。ここでの閾値は、例えばキャンセラでキャンセルしきれなくなる程度の干渉レベルであって、受信の通信品質に影響を与え得る干渉レベルである。ステップＳ１において、干渉レベルが閾値以上ないと判定されている間はステップＳ１の判定は繰り返される。ステップＳ１において、干渉レベルが閾値以上であると判定されたときには、処理はステップＳ２に移行する。 In step S1, the radio processing unit 20 determines whether or not the interference level is equal to or higher than the threshold value. The threshold value here is, for example, an interference level that cannot be completely canceled by the canceller, and is an interference level that can affect the communication quality of reception. In step S1, the determination in step S1 is repeated while it is determined that the interference level is not equal to or higher than the threshold value. When it is determined in step S1 that the interference level is equal to or higher than the threshold value, the process proceeds to step S2.

ステップＳ２において、無線処理部２０は、送信トラフィックが受信トラフィックよりも小さいか否かを判定する。ステップＳ２において、送信トラフィックが受信トラフィックよりも小さくないと判定されたときには、処理はステップＳ１に戻る。ステップＳ２において、送信トラフィックが受信トラフィックよりも小さいと判定されたときには、処理はステップＳ３に移行する。 In step S2, the radio processing unit 20 determines whether or not the transmitted traffic is smaller than the received traffic. When it is determined in step S2 that the transmitted traffic is not smaller than the received traffic, the process returns to step S1. When it is determined in step S2 that the transmitted traffic is smaller than the received traffic, the process proceeds to step S3.

ステップＳ３において、無線処理部２０は、通信品質が維持されるように送信回路１２を制御する。例えば、無線処理部２０は、送信回路１２による送信信号の送信電力を低減させる。また、無線処理部２０は、送信電力の低減により、通信相手の通信品質の劣化が危惧されるときには、送信信号の送信速度も低減させる。その後、処理はステップＳ１に戻る。 In step S3, the radio processing unit 20 controls the transmission circuit 12 so that the communication quality is maintained. For example, the wireless processing unit 20 reduces the transmission power of the transmission signal by the transmission circuit 12. Further, the wireless processing unit 20 also reduces the transmission speed of the transmission signal when there is a concern that the communication quality of the communication partner may be deteriorated due to the reduction of the transmission power. After that, the process returns to step S1.

以上説明したように第１の実施形態では、干渉レベルが閾値以上であり、送信トラフィックが受信トラフィックより小さいときには、無線処理部２０は、送信回路１２の動作を制御する。このようにすることで、より効率的に無線の通信品質を向上させることができる。例えば、図７Ａに示すように、現在の最大の送信速度に対する実際の送信トラフィックが、現在の最大の受信速度に対する実際の受信トラフィックよりも小さい場合、送信速度を低下させても必要なトラフィックを伝送することができる。この場合、図７Ｂに示すように、送信速度を低下させることで、必要なトラフィックを確保しつつ、送信及び受信の双方の通信品質は維持される。 As described above, in the first embodiment, when the interference level is equal to or higher than the threshold value and the transmission traffic is smaller than the reception traffic, the radio processing unit 20 controls the operation of the transmission circuit 12. By doing so, it is possible to improve the wireless communication quality more efficiently. For example, as shown in FIG. 7A, if the actual transmitted traffic for the current maximum transmission speed is smaller than the actual received traffic for the current maximum reception speed, the required traffic is transmitted even if the transmission speed is reduced. can do. In this case, as shown in FIG. 7B, by reducing the transmission speed, the communication quality of both transmission and reception is maintained while securing the necessary traffic.

ここで、第１の実施形態では、干渉レベルが閾値以上となったときにだけ、送信トラフィックが受信トラフィックよりも大きいか否かの判定が行われるが、これに限らない。例えば、干渉レベルが閾値以上であるか否かに代えて、受信の通信品質が劣化したか否かが判定されてもよい。受信の通信品質は、例えば受信信号の誤り率を含む。 Here, in the first embodiment, it is determined whether or not the transmitted traffic is larger than the received traffic only when the interference level becomes equal to or higher than the threshold value, but the present invention is not limited to this. For example, instead of whether or not the interference level is equal to or higher than the threshold value, it may be determined whether or not the communication quality of reception has deteriorated. The communication quality of reception includes, for example, the error rate of the received signal.

［第２の実施形態］
第２の実施形態にかかわる電子装置について説明する。第２の実施形態の電子装置の構成は、図１と同様である。第２の実施形態においては、無線処理部２０は、送信トラフィックと受信トラフィックとを用いて受信速度を制御する。例えば、受信制御部２２は通信相手に対して送信信号の送信速度を変更するように通知することで、受信信号の受信速度を制御する。 [Second Embodiment]
The electronic device according to the second embodiment will be described. The configuration of the electronic device of the second embodiment is the same as that of FIG. In the second embodiment, the radio processing unit 20 controls the reception speed using the transmission traffic and the reception traffic. For example, the reception control unit 22 controls the reception speed of the reception signal by notifying the communication partner to change the transmission speed of the transmission signal.

図８は、第２の実施形態における電子装置の動作を示すフローチャートである。ステップＳ１１において、無線処理部２０は、干渉レベルが閾値以上であるか否かを判定する。ステップＳ１１において、干渉レベルが閾値以上ないと判定されている間はステップＳ１１の判定は繰り返される。ステップＳ１１において、干渉レベルが閾値以上であると判定されたときには、処理はステップＳ１２に移行する。 FIG. 8 is a flowchart showing the operation of the electronic device according to the second embodiment. In step S11, the radio processing unit 20 determines whether or not the interference level is equal to or higher than the threshold value. In step S11, the determination in step S11 is repeated while it is determined that the interference level is not equal to or higher than the threshold value. When it is determined in step S11 that the interference level is equal to or higher than the threshold value, the process proceeds to step S12.

ステップＳ１２において、無線処理部２０は、送信トラフィックが受信トラフィックよりも大きいか否かを判定する。ステップＳ１２において、送信トラフィックが受信トラフィックよりも大きくないと判定されたときには、処理はステップＳ１１に戻る。ステップＳ１２において、送信トラフィックが受信トラフィックよりも大きいと判定されたときには、処理はステップＳ１３に移行する。 In step S12, the radio processing unit 20 determines whether or not the transmitted traffic is larger than the received traffic. When it is determined in step S12 that the transmitted traffic is not larger than the received traffic, the process returns to step S11. When it is determined in step S12 that the transmitted traffic is larger than the received traffic, the process proceeds to step S13.

ステップＳ１３において、無線処理部２０は、通信品質が維持されるように、通信相手に対して送信速度、すなわち自身の受信速度を低減させるように通知する。その後、処理はステップＳ１１に戻る。 In step S13, the wireless processing unit 20 notifies the communication partner to reduce the transmission speed, that is, its own reception speed so that the communication quality is maintained. After that, the process returns to step S11.

以上説明したように第２の実施形態では、干渉レベルが閾値以上であり、送信トラフィックが受信トラフィックより大きいときには、無線処理部２０は、通信相手の送信回路１２の動作が制御されるように通知を行う。このようにすることで、より効率的に無線の通信品質を向上させることができる。例えば、図９Ａに示すように、現在の最大の送信速度に対する実際の送信トラフィックが、現在の最大の受信速度に対する実際の受信トラフィックよりも大きい場合、自身の送信速度を低下させてしまうと必要なトラフィックを伝送することができなくなる。一方、受信については、受信速度を低下させても必要なトラフィックを伝送することができる。このため、第２の実施形態では、図９Ｂに示すように、受信速度を低下させることで、必要なトラフィックを確保しつつ、送信及び受信の双方の通信品質は維持される。 As described above, in the second embodiment, when the interference level is equal to or higher than the threshold value and the transmitted traffic is larger than the received traffic, the radio processing unit 20 notifies that the operation of the transmission circuit 12 of the communication partner is controlled. I do. By doing so, it is possible to improve the wireless communication quality more efficiently. For example, as shown in FIG. 9A, when the actual transmission traffic for the current maximum transmission speed is larger than the actual reception traffic for the current maximum reception speed, it is necessary to reduce its own transmission speed. You will not be able to carry traffic. On the other hand, regarding reception, necessary traffic can be transmitted even if the reception speed is reduced. Therefore, in the second embodiment, as shown in FIG. 9B, by lowering the reception speed, the communication quality of both transmission and reception is maintained while securing the necessary traffic.

ここで、第２の実施形態では、干渉レベルが閾値以上となったときにだけ、送信トラフィックが受信トラフィックよりも大きいか否かの判定が行われるが、これに限らない。例えば、干渉レベルが閾値以上であるか否かに代えて、受信の通信品質が劣化したか否かが判定されてもよい。受信の通信品質は、例えば受信信号の誤り率を含む。 Here, in the second embodiment, it is determined whether or not the transmitted traffic is larger than the received traffic only when the interference level becomes equal to or higher than the threshold value, but the present invention is not limited to this. For example, instead of whether or not the interference level is equal to or higher than the threshold value, it may be determined whether or not the communication quality of reception has deteriorated. The communication quality of reception includes, for example, the error rate of the received signal.

［第３の実施形態］
第３の実施形態にかかわる電子装置について説明する。第３の実施形態の電子装置の構成は、図１と同様である。第３の実施形態においては、無線処理部２０は、送信トラフィックと受信トラフィックとを用いて送信信号の送信電力及び送信速度を制御する。さらに、第３の実施形態においては、無線処理部２０は、送信トラフィックと受信トラフィックとを用いて受信信号の受信速度を制御することも行う。そして、第３の実施形態では、無線処理部２０は、第１の実施形態と同様の制御と第２の実施形態と同様の制御の２つの制御を送信トラフィックと受信トラフィックの関係に応じて切り替える。このようにして、第３の実施形態では通信品質と伝送速度と必要なレベルに維持することが可能である。 [Third Embodiment]
The electronic device according to the third embodiment will be described. The configuration of the electronic device of the third embodiment is the same as that of FIG. In the third embodiment, the radio processing unit 20 controls the transmission power and the transmission speed of the transmission signal by using the transmission traffic and the reception traffic. Further, in the third embodiment, the radio processing unit 20 also controls the reception speed of the received signal by using the transmission traffic and the reception traffic. Then, in the third embodiment, the wireless processing unit 20 switches between two controls, the same control as in the first embodiment and the same control as in the second embodiment, according to the relationship between the transmission traffic and the reception traffic. .. In this way, in the third embodiment, it is possible to maintain the communication quality, the transmission speed, and the required level.

図１０は、第３の実施形態における電子装置の動作を示すフローチャートである。ステップＳ２１において、無線処理部２０は、干渉レベルが閾値以上であるか否かを判定する。ステップＳ２１において、干渉レベルが閾値以上ないと判定されている間はステップＳ２１の判定は繰り返される。ステップＳ２１において、干渉レベルが閾値以上であると判定されたときには、処理はステップＳ２２に移行する。 FIG. 10 is a flowchart showing the operation of the electronic device according to the third embodiment. In step S21, the radio processing unit 20 determines whether or not the interference level is equal to or higher than the threshold value. In step S21, the determination in step S21 is repeated while it is determined that the interference level is not equal to or higher than the threshold value. When it is determined in step S21 that the interference level is equal to or higher than the threshold value, the process proceeds to step S22.

ステップＳ２２において、無線処理部２０は、送信トラフィックが受信トラフィックよりも小さいか否かを判定する。ステップＳ２２において、送信トラフィックが受信トラフィックよりも小さいと判定されたときには、処理はステップＳ２３に移行する。ステップＳ２２において、送信トラフィックが受信トラフィックよりも小さくないと判定されたときには、処理はステップＳ２４に移行する。 In step S22, the radio processing unit 20 determines whether the transmitted traffic is smaller than the received traffic. When it is determined in step S22 that the transmitted traffic is smaller than the received traffic, the process proceeds to step S23. When it is determined in step S22 that the transmitted traffic is not smaller than the received traffic, the process proceeds to step S24.

ステップＳ２３において、無線処理部２０は、通信品質が維持されるように送信回路１２を制御する。例えば、無線処理部２０は、送信回路１２による送信信号の送信電力を低減させる。また、無線処理部２０は、送信電力の低減により、通信相手の通信品質の劣化が危惧されるときには、送信信号の送信速度も低減させる。その後、処理はステップＳ２１に戻る。 In step S23, the radio processing unit 20 controls the transmission circuit 12 so that the communication quality is maintained. For example, the wireless processing unit 20 reduces the transmission power of the transmission signal by the transmission circuit 12. Further, the wireless processing unit 20 also reduces the transmission speed of the transmission signal when there is a concern that the communication quality of the communication partner may be deteriorated due to the reduction of the transmission power. After that, the process returns to step S21.

ステップＳ２４において、無線処理部２０は、通信品質が維持されるように、通信相手に対して送信速度、すなわち自身の受信速度を低減させるように通知する。その後、処理はステップＳ２１に戻る。 In step S24, the wireless processing unit 20 notifies the communication partner to reduce the transmission speed, that is, its own reception speed so that the communication quality is maintained. After that, the process returns to step S21.

以上説明したように第３の実施形態では、干渉レベルが閾値以上であり、送信トラフィックが受信トラフィックより小さいときには、無線処理部２０は、送信回路１２の動作を制御する。一方、第３の実施形態では、干渉レベルが閾値以上であり、送信トラフィックが受信トラフィックより小さくないときには、無線処理部２０は、通信相手の送信回路１２の動作が制御されるように通知を行う。このようにすることで、より効率的に無線の通信品質を向上させることができる。つまり、第３の実施形態では、図７のような場合と図９のような場合のどちらが起きた場合でも、適切に制御が行われる。この結果、送信及び受信の通信品質を維持させながら、双方の必要な伝送速度を維持できるという効果が得られる。 As described above, in the third embodiment, when the interference level is equal to or higher than the threshold value and the transmission traffic is smaller than the reception traffic, the radio processing unit 20 controls the operation of the transmission circuit 12. On the other hand, in the third embodiment, when the interference level is equal to or higher than the threshold value and the transmitted traffic is not smaller than the received traffic, the wireless processing unit 20 notifies that the operation of the transmission circuit 12 of the communication partner is controlled. .. By doing so, it is possible to improve the wireless communication quality more efficiently. That is, in the third embodiment, control is appropriately performed regardless of whether the case shown in FIG. 7 or the case shown in FIG. 9 occurs. As a result, it is possible to obtain the effect that the required transmission speeds of both can be maintained while maintaining the communication quality of transmission and reception.

ここで、第３の実施形態でも、干渉レベルが閾値以上となったときにだけ、送信トラフィックが受信トラフィックよりも大きいか否かの判定が行われるが、これに限らない。例えば、干渉レベルが閾値以上であるか否かに代えて、受信の通信品質が劣化したか否かが判定されてもよい。受信の通信品質は、例えば受信信号の誤り率を含む。 Here, also in the third embodiment, it is determined whether or not the transmitted traffic is larger than the received traffic only when the interference level becomes equal to or higher than the threshold value, but the present invention is not limited to this. For example, instead of whether or not the interference level is equal to or higher than the threshold value, it may be determined whether or not the communication quality of reception has deteriorated. The communication quality of reception includes, for example, the error rate of the received signal.

また、送信トラフィックが受信トラフィックよりも大きいか否かの判定が行われずに、始めから送信制御と受信制御の両方が行われてもよい。図１１は、このような変形例の無線処理部２０の動作を示すフローチャートである。 Further, both transmission control and reception control may be performed from the beginning without determining whether or not the transmission traffic is larger than the reception traffic. FIG. 11 is a flowchart showing the operation of the wireless processing unit 20 of such a modified example.

ステップＳ３１において、無線処理部２０は、干渉レベルが閾値以上であるか否かを判定する。ステップＳ３１において、干渉レベルが閾値以上ないと判定されている間はステップＳ３１の判定は繰り返される。ステップＳ３１において、干渉レベルが閾値以上であると判定されたときには、処理はステップＳ３２に移行する。 In step S31, the radio processing unit 20 determines whether or not the interference level is equal to or higher than the threshold value. In step S31, the determination in step S31 is repeated while it is determined that the interference level is not equal to or higher than the threshold value. When it is determined in step S31 that the interference level is equal to or higher than the threshold value, the process proceeds to step S32.

ステップＳ３２において、無線処理部２０は、通信品質が維持されるように送信回路１２を制御する。また、無線処理部２０は、通信品質が維持されるように、通信相手に対して送信速度、すなわち自身の受信速度を低減させるように通知する。その後、処理はステップＳ３１に戻る。例えば、無線処理部２０は、現在の最大伝送速度と比較した送信トラフィックと受信トラフィックのそれぞれのマージンを見て、よりマージンが大きい方の伝送速度の低減量を多くするように制御する。例えば、図１２Ａに示すように、送信トラフィックのマージンの方が受信トラフィックのマージンよりも大きい場合、無線処理部２０は送信電力及び送信速度を低下させつつ、受信速度を低下させるように通信相手に通知する。このとき、無線処理部２０は、図１２Ｂに示すように、送信速度の低下量を受信速度の低下量よりも大きくするように送信側と受信側のそれぞれの制御を行う。また、例えば、図１３Ａに示すように、受信トラフィックのマージンの方が送信トラフィックのマージンよりも大きい場合、無線処理部２０は送信電力及び送信速度を低下させつつ、受信速度を低下させるように通信相手に通知する。このとき、図１３Ｂに示すように、無線処理部２０は、受信速度の低下量を送信速度の低下量よりも大きくするように送信側と受信側のそれぞれの制御を行う。 In step S32, the radio processing unit 20 controls the transmission circuit 12 so that the communication quality is maintained. Further, the wireless processing unit 20 notifies the communication partner to reduce the transmission speed, that is, its own reception speed so that the communication quality is maintained. After that, the process returns to step S31. For example, the radio processing unit 20 looks at the respective margins of the transmission traffic and the reception traffic compared with the current maximum transmission speed, and controls so as to increase the reduction amount of the transmission speed with the larger margin. For example, as shown in FIG. 12A, when the margin of the transmission traffic is larger than the margin of the reception traffic, the radio processing unit 20 reduces the transmission power and the transmission speed while lowering the reception speed so as to reduce the reception speed. Notice. At this time, as shown in FIG. 12B, the wireless processing unit 20 controls each of the transmitting side and the receiving side so that the amount of decrease in transmission speed is larger than the amount of decrease in reception speed. Further, for example, as shown in FIG. 13A, when the margin of the received traffic is larger than the margin of the transmitted traffic, the wireless processing unit 20 communicates so as to reduce the received speed while reducing the transmission power and the transmission speed. Notify the other party. At this time, as shown in FIG. 13B, the wireless processing unit 20 controls each of the transmitting side and the receiving side so that the amount of decrease in reception speed is larger than the amount of decrease in transmission speed.

このような変形例では、送信側と受信側の一方だけを制御する場合に比べて、送信側と受信側の個々の制御量を少なくすることができる。 In such a modification, the individual control amounts of the transmitting side and the receiving side can be reduced as compared with the case of controlling only one of the transmitting side and the receiving side.

ここで、変形例において、無線処理部２０は、必ずしも送信トラフィックのマージンと受信トラフィックのマージンを比較して送信側と受信側の制御をする必要はない。例えば、無線処理部２０は、自分の受信信号の誤り率と通信相手の受信信号の誤り率とを比較し、より誤り率の低いほうの伝送速度の低下量が大きくなるように制御してもよい。 Here, in the modified example, the wireless processing unit 20 does not necessarily have to control the transmitting side and the receiving side by comparing the margin of the transmitted traffic and the margin of the received traffic. For example, the wireless processing unit 20 may compare the error rate of its own received signal with the error rate of the received signal of the communication partner, and control so that the lower the error rate, the larger the decrease in the transmission speed. good.

［第４の実施形態］
第４の実施形態にかかわる電子装置について説明する。第４の実施形態は、送信信号の一部にヌル信号を含める例である。ヌル信号は、ゼロ又はゼロと見なせる程度に非常に小さい信号電力を有する信号である。 [Fourth Embodiment]
The electronic device according to the fourth embodiment will be described. The fourth embodiment is an example in which a null signal is included as a part of the transmission signal. A null signal is a signal that has zero or very small signal power that can be considered zero.

図１４は、時間方向に部分的にヌル信号を含む送信信号及び受信信号の例を示す図である。ここで、図１４の上段の送信信号と下段の受信信号は同一の電子装置から見た送信信号と受信信号である。つまり、図１４の上段の送信信号は通信相手の電子装置から見ると受信信号になり、図１４の下段の受信信号は通信相手の電子装置から見ると送信信号になる。図１４の横軸は時間軸である。図１４の例では、ヌル信号は、例えば一定時間毎に送信信号に含められる。ここで、送信信号と受信信号（通信相手の送信信号）とに同時にヌル信号が含められることはない。送信信号と受信信号（通信相手の送信信号）とに同時にヌル信号が含められることがないことにより、通信相手の送信信号にヌル信号が含められている期間では、電子装置は、自身の送信信号に起因する干渉信号だけを受信信号として取得することになる。このため、干渉検出回路１５は、容易に干渉レベルを検出することができる。 FIG. 14 is a diagram showing an example of a transmission signal and a reception signal including a null signal partially in the time direction. Here, the upper transmission signal and the lower reception signal in FIG. 14 are a transmission signal and a reception signal seen from the same electronic device. That is, the transmission signal in the upper part of FIG. 14 becomes a reception signal when viewed from the electronic device of the communication partner, and the reception signal in the lower part of FIG. 14 becomes a transmission signal when viewed from the electronic device of the communication partner. The horizontal axis of FIG. 14 is the time axis. In the example of FIG. 14, the null signal is included in the transmission signal at regular intervals, for example. Here, a null signal is not included in the transmission signal and the reception signal (transmission signal of the communication partner) at the same time. Since a null signal is not included in the transmission signal and the reception signal (transmission signal of the communication partner) at the same time, the electronic device has its own transmission signal during the period when the transmission signal of the communication partner includes the null signal. Only the interference signal caused by the above will be acquired as the received signal. Therefore, the interference detection circuit 15 can easily detect the interference level.

図１５は、周波数方向に部分的にヌル信号を含む送信信号及び受信信号の例を示す図である。ここで、図１５の上段の送信信号と下段の受信信号も同一の電子装置から見た送信信号と受信信号である。図１５の横軸は周波数軸である。図１５の例では、ヌル信号は、例えば送信信号の一部の周波数帯に含められる。ここで、送信信号と受信信号（通信相手の送信信号）の同一周波数帯にはヌル信号が含められることはない。送信信号と受信信号（通信相手の送信信号）の同一周波数帯にヌル信号が含められることがないことにより、電子装置は、受信信号から通信相手のヌル信号の周波数帯の信号を抽出することで、自身の送信信号に起因する干渉信号だけを受信信号として取得することになる。このため、干渉検出回路１５は、容易に干渉レベルを検出することができる。 FIG. 15 is a diagram showing an example of a transmission signal and a reception signal including a null signal partially in the frequency direction. Here, the transmission signal in the upper row and the reception signal in the lower row of FIG. 15 are also the transmission signal and the reception signal seen from the same electronic device. The horizontal axis of FIG. 15 is the frequency axis. In the example of FIG. 15, the null signal is included, for example, in a part of the frequency band of the transmission signal. Here, a null signal is not included in the same frequency band of the transmission signal and the reception signal (transmission signal of the communication partner). Since a null signal is not included in the same frequency band of the transmission signal and the reception signal (transmission signal of the communication partner), the electronic device extracts the signal of the null signal frequency band of the communication partner from the reception signal. , Only the interference signal caused by its own transmission signal is acquired as a reception signal. Therefore, the interference detection circuit 15 can easily detect the interference level.

なお、本発明は上記実施形態そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化できる。また、上記実施形態に開示されている複数の構成要素の適宜な組み合わせにより、種々の発明を形成できる。例えば、実施形態に示される全構成要素から幾つかの構成要素を削除してもよい。さらに、異なる実施形態にわたる構成要素を適宜組み合わせてもよい。 The present invention is not limited to the above-described embodiment as it is, and at the implementation stage, the components can be modified and embodied within a range that does not deviate from the gist thereof. In addition, various inventions can be formed by an appropriate combination of the plurality of components disclosed in the above-described embodiment. For example, some components may be removed from all the components shown in the embodiments. In addition, components across different embodiments may be combined as appropriate.

１，１ａ，１ｂ電子装置、１０無線回路、１１送信アンテナ、１２送信回路、１３受信アンテナ、１４受信回路、１５干渉検出回路、２０無線処理部、２１送信制御部、２２受信制御部、２３送信トラフィック検出部、２４受信トラフィック検出部、３０処理部。 1,1a, 1b Electronic device, 10 radio circuit, 11 transmission antenna, 12 transmission circuit, 13 reception antenna, 14 reception circuit, 15 interference detection circuit, 20 radio processing unit, 21 transmission control unit, 22 reception control unit, 23 transmission Traffic detection unit, 24 received traffic detection unit, 30 processing unit.

Claims

A transmitter that transmits transmission signals in the transmission frequency band and transmission time zone,
A receiving unit that receives a received signal in a reception frequency band that at least partially overlaps the transmission frequency band and a reception time zone that at least partially overlaps the transmission time zone.
Detects the transmission traffic of the transmitter and
Detecting the received traffic of the receiving unit,
The transmission traffic and the reception traffic are used to control at least the transmission power of the transmission signal transmitted by the transmission unit.
Control unit and
Equipped with
The control unit is an electronic device that reduces the transmission power of the transmission signal transmitted by the transmission unit when the transmission traffic is smaller than the reception traffic.

A transmitter that transmits transmission signals in the transmission frequency band and transmission time zone,
A receiving unit that receives a received signal in a reception frequency band that at least partially overlaps the transmission frequency band and a reception time zone that at least partially overlaps the transmission time zone.
Detects the transmission traffic of the transmitter and
Detecting the received traffic of the receiving unit,
The transmission traffic and the reception traffic are used to control at least the transmission power of the transmission signal transmitted by the transmission unit.
Control unit and
Equipped with
The control unit is an electronic device that reduces the transmission speed of the transmission signal transmitted by the transmission unit when the transmission traffic is smaller than the reception traffic.

A transmitter that transmits transmission signals in the transmission frequency band and transmission time zone,
A receiving unit that receives a received signal in a reception frequency band that at least partially overlaps the transmission frequency band and a reception time zone that at least partially overlaps the transmission time zone.
Detects the transmission traffic of the transmitter and
Detecting the received traffic of the receiving unit,
The transmission traffic and the reception traffic are used to control at least the transmission power of the transmission signal transmitted by the transmission unit.
Control unit and
Equipped with
The control unit is an electronic device that notifies the communication partner to reduce the transmission speed of the transmission signal transmitted by the communication partner when the transmission traffic is larger than the reception traffic.

A transmitter that transmits transmission signals in the transmission frequency band and transmission time zone,
A receiving unit that receives a received signal in a reception frequency band that at least partially overlaps the transmission frequency band and a reception time zone that at least partially overlaps the transmission time zone.
Detects the transmission traffic of the transmitter and
Detecting the received traffic of the receiving unit,
Using the transmitted traffic and the received traffic, the communication partner is notified to change the transmission speed of the transmission signal transmitted by the communication partner.
Control unit and
Equipped with
The control unit is an electronic device that reduces the transmission power of the transmission signal transmitted by the transmission unit when the transmission traffic is smaller than the reception traffic.

A transmitter that transmits transmission signals in the transmission frequency band and transmission time zone,
A receiving unit that receives a received signal in a reception frequency band that at least partially overlaps the transmission frequency band and a reception time zone that at least partially overlaps the transmission time zone.
Detects the transmission traffic of the transmitter and
Detecting the received traffic of the receiving unit,
Using the transmitted traffic and the received traffic, the communication partner is notified to change the transmission speed of the transmission signal transmitted by the communication partner.
Control unit and
Equipped with
The control unit is an electronic device that reduces the transmission speed of the transmission signal transmitted by the transmission unit when the transmission traffic is smaller than the reception traffic.

A transmitter that transmits transmission signals in the transmission frequency band and transmission time zone,
A receiving unit that receives a received signal in a reception frequency band that at least partially overlaps the transmission frequency band and a reception time zone that at least partially overlaps the transmission time zone.
Detects the transmission traffic of the transmitter and
Detecting the received traffic of the receiving unit,
Using the transmitted traffic and the received traffic, the communication partner is notified to change the transmission speed of the transmission signal transmitted by the communication partner.
Control unit and
Equipped with
The control unit notifies the communication partner to reduce the transmission speed of the transmission signal transmitted by the communication partner when the transmission traffic is larger than the reception traffic.

The control unit reduces the transmission power of the transmission signal transmitted by the transmission unit when the transmission traffic is smaller than the reception traffic, according to any one of claims 2, 3, 5, and 6. Electronic device.

The electronic device according to claim 3 or 6, wherein the control unit reduces the transmission speed of the transmission signal transmitted by the transmission unit when the transmission traffic is smaller than the reception traffic.

Further, an interference detection unit for detecting the interference level of the interference signal based on the transmission signal included in the reception signal is provided.
The electronic device according to any one of claims 1 to 3, wherein the control unit controls at least the transmission power of the transmission signal transmitted by the transmission unit when the interference level is equal to or higher than a threshold value.

Further, an interference detection unit for detecting the interference level of the interference signal based on the transmission signal included in the reception signal is provided.
The one according to any one of claims 4 to 6, wherein the control unit notifies the communication partner to reduce the transmission speed of the transmission signal transmitted by the communication partner when the interference level is equal to or higher than the threshold value. Electronic device.

The receiving unit receives the received signal including a null signal in a part of time zone or a part of frequency band, and receives the received signal.
The electronic device according to claim 9 or 10, wherein the interference detection unit detects the interference level in the time zone or the frequency band in which the null signal is included in the received signal.

The transmission signal is transmitted by an electronic device in the transmission frequency band and transmission time zone, and
A reception signal is received by the electronic device in a reception frequency band that at least partially overlaps the transmission frequency band and a reception time zone that at least partially overlaps the transmission time zone.
Detecting the outgoing traffic of the electronic device,
Detecting the received traffic of the electronic device,
The transmitted traffic and the received traffic are used to control at least the transmission power of the transmission signal transmitted by the electronic device.
A communication method in which the transmission power of the transmission signal is reduced when the transmission traffic is smaller than the reception traffic.

The transmission signal is transmitted by an electronic device in the transmission frequency band and transmission time zone, and
A reception signal is received by the electronic device in a reception frequency band that at least partially overlaps the transmission frequency band and a reception time zone that at least partially overlaps the transmission time zone.
Detecting the outgoing traffic of the electronic device,
Detecting the received traffic of the electronic device,
The transmitted traffic and the received traffic are used to control at least the transmission power of the transmission signal transmitted by the electronic device.
A communication method that reduces the transmission speed of the transmission signal when the transmission traffic is smaller than the reception traffic.

The transmission signal is transmitted by an electronic device in the transmission frequency band and transmission time zone, and
A reception signal is received by the electronic device in a reception frequency band that at least partially overlaps the transmission frequency band and a reception time zone that at least partially overlaps the transmission time zone.
Detecting the outgoing traffic of the electronic device,
Detecting the received traffic of the electronic device,
The transmitted traffic and the received traffic are used to control at least the transmission power of the transmission signal transmitted by the electronic device.
A communication method for notifying the communication partner to reduce the transmission speed of a transmission signal transmitted by the communication partner of the electronic device when the transmission traffic is larger than the reception traffic.

The transmission signal is transmitted by an electronic device in the transmission frequency band and transmission time zone, and
A reception signal is received by the electronic device in a reception frequency band that at least partially overlaps the transmission frequency band and a reception time zone that at least partially overlaps the transmission time zone.
Detecting the outgoing traffic of the electronic device,
Detecting the received traffic of the electronic device,
Using the transmitted traffic and the received traffic, the communication partner is notified to change the transmission speed of the transmission signal transmitted by the communication partner of the electronic device.
A communication method in which the transmission power of the transmission signal is reduced when the transmission traffic is smaller than the reception traffic.

The transmission signal is transmitted by an electronic device in the transmission frequency band and transmission time zone, and
A reception signal is received by the electronic device in a reception frequency band that at least partially overlaps the transmission frequency band and a reception time zone that at least partially overlaps the transmission time zone.
Detecting the outgoing traffic of the electronic device,
Detecting the received traffic of the electronic device,
Using the transmitted traffic and the received traffic, the communication partner is notified to change the transmission speed of the transmission signal transmitted by the communication partner of the electronic device.
A communication method that reduces the transmission speed of the transmission signal when the transmission traffic is smaller than the reception traffic.

The transmission signal is transmitted by an electronic device in the transmission frequency band and transmission time zone, and
A reception signal is received by the electronic device in a reception frequency band that at least partially overlaps the transmission frequency band and a reception time zone that at least partially overlaps the transmission time zone.
Detecting the outgoing traffic of the electronic device,
Detecting the received traffic of the electronic device,
Using the transmitted traffic and the received traffic, the communication partner is notified to change the transmission speed of the transmission signal transmitted by the communication partner of the electronic device.
A communication method for notifying a communication partner to reduce the transmission speed of a transmission signal transmitted by the communication partner when the transmission traffic is larger than the reception traffic.