Communication system and its resource assignment method, and communication controller
Abstract
[Task] Under the condition of multi-dimensional traffic, resource utilization is maintained even if there are many communications that require a large amount of resources.
Solution.Measure the current traffic volume (step S201) and then determine the threshold based on the requested resource volume (step S203). Then, the current traffic volume and the threshold value are compared (step S205), and if the measured traffic exceeds this threshold value, it is determined that the reception is not possible and the processing is terminated. If the measured traffic is less than or equal to the threshold value, it is determined that the traffic can be accepted, the resource request is accepted, and the process is terminated (step S207).

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Projected expiry passed 2 October 2021, 5 years ago.
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36 claims: 12 independent, 24 dependent
- 1【特許請求の範囲】 【請求項1】 第1のノードから送信されるリソースの要求により、複数の通信によって共有されるリソースの割り当てを行う第2のノードを備えた移動通信システムであって、 前記第2のノードは、 現在のトラフィック量または該トラフィック量に相当する量を測定する測定手段と、 該測定手段によって測定された前記現在のトラフィック量または該トラフィック量に相当する量と基準値とを比較することにより、前記リソースの要求を受付けるか否かを判定する第1の判定手段と、該第1の判定手段による判定の結果に基づいて、前記リソースの要求を受付ける受付手段とを備えたことを特徴とする通信システム。
- 2【請求項2】 前記基準値は、前記第1のノードから要求された前記リソースの量が大きいほど、前記リソースの要求の受付がより行われにくくなるように設定されることを特徴とする請求項1に記載の通信システム。
- 3【請求項3】 前記第1の判定手段により、前記リソースの要求を受付けないことと判定された場合、複数の通信が競合して共通に使用するリソースを使用することにより、通信を継続することを特徴とする請求項1または2に記載の通信システム。
- 4【請求項4】 前記現在のトラフィック量または該トラフィック量に相当する量が前記基準値をこえた場合、前記第1のノードから要求された前記リソースの量を減らすことができるか否かを判定する第2の判定手段を備え、前記第1の判定手段は、前記第2の判定手段により前記リソース量を減らすことができると判定された場合に前記リソースの要求を受付けるか否かを判定することを特徴とする請求項1ないし3のいずれか1項に記載の通信システム。
- 5【請求項5】 前記第1の判定手段によって前記リソースの割り当ての要求を受付けることと判定された場合、要求された前記リソースに相当する空きリソースがあるかどうかを判定する第3の判定手段を備え、前記第2の判定手段は、前記第3の判定手段によって前記空きリソースがないと判定された場合に、前記リソース量を減らすことができるか否かを判定することを特徴とする請求項4に記載の通信システム。
- 6【請求項6】 前記第2の判定手段によって前記リソース量を減らすことができないと判定された場合、複数の通信が競合して共通に使用するリソースを使用することにより、通信を継続することを特徴とする請求項4または5に記載の通信システム。
- 7【請求項7】 前記通信システムは、複数の基地局と、無線チャネルを介して前記基地局と相互に通信を行う複数の移動局とを備え、前記測定手段は、前記通信システムにおいて現在使用中の無線チャネルを計数することにより前記現在のトラフィック量を測定することを特徴とする請求項1ないし6のいずれか1項に記載の通信システム。
- 8【請求項8】 前記通信システムは、複数の基地局と、情報データ変調信号を拡散符号にて拡散することにより前記基地局と相互に通信を行う複数の移動局とを備え、前記測定手段は、前記基地局において受信する信号の干渉電力を測定することにより前記現在のトラフィック量を測定することを特徴とする請求項1ないし6のいずれか1項に記載の通信システム。
- 9【請求項9】 前記通信システムは、複数の基地局と、情報データ変調信号を拡散符号にて拡散することにより前記基地局と相互に通信を行う複数の移動局とを備え、前記測定手段は、前記基地局の送信電力の総計を測定することにより前記現在のトラフィック量を測定することを特徴とする請求項1ないし6のいずれか1項に記載の通信システム。
- 10【請求項10】 第1のノードから送信される、複数の通信によって共有されるリソースの要求に基づき、第2のノードにおいて行われる通信システムのリソースの割り当て方法であって、 現在のトラフィック量または該トラフィック量に相当する量を測定する測定ステップと、 該測定ステップにおいて測定された前記現在のトラフィック量または該トラフィック量に相当する量と基準値とを比較することにより、前記リソースの要求を受付けるか否かを判定する第1の判定ステップと、 該第1の判定ステップにおける判定の結果に基づいて、前記リソースの要求を受付ける受付ステップとを備えたことを特徴とするリソースの割り当て方法。
- 11【請求項11】 前記基準値は、前記第1のノードから要求された前記リソースの量が大きいほど、前記リソースの要求の受付がより行われにくくなるように設定されることを特徴とする請求項10に記載のリソースの割り当て方法。
- 12【請求項12】 前記第1の判定ステップにおいて、前記リソースの要求を受付けないことと判定された場合、複数の通信が競合して共通に使用するリソースを使用することにより、通信を継続することを特徴とする請求項10または11に記載のリソースの割り当て方法。
- 13【請求項13】 前記現在のトラフィック量または該トラフィック量に相当する量が前記基準値をこえた場合、前記第1のノードから要求された前記リソースの量を減らすことができるか否かを判定する第2の判定ステップを備え、前記第1の判定ステップは、前記第2の判定ステップにおいて前記リソース量を減らすことができると判定された場合に前記リソースの要求を受付けるか否かを判定することを特徴とする請求項10ないし12のいずれか1項に記載のリソースの割り当て方法。
- 14【請求項14】 前記第1の判定ステップにおいて前記リソースの割り当ての要求を受付けることと判定された場合、要求された前記リソースに相当する空きリソースがあるかどうかを判定する第3の判定ステップを備え、前記第2の判定ステップは、前記第3の判定ステップにおいて前記空きリソースがないと判定された場合に、前記リソース量を減らすことができるか否かを判定することを特徴とする請求項13に記載のリソースの割り当て方法。
- 15【請求項15】 前記第2の判定ステップにおいて前記リソース量を減らすことができないと判定された場合、複数の通信が競合して共通に使用するリソースを使用することにより、通信を継続することを特徴とする請求項13または14に記載のリソースの割り当て方法。
- 16【請求項16】 前記通信システムは、複数の基地局と、無線チャネルを介して前記基地局と相互に通信を行う複数の移動局とを備え、前記測定ステップは、前記通信システムにおいて現在使用中の無線チャネルを計数することにより前記現在のトラフィック量を測定することを特徴とする請求項10ないし15のいずれか1項に記載のリソースの割り当て方法。
- 17【請求項17】 前記通信システムは、複数の基地局と、情報データ変調信号を拡散符号にて拡散することにより前記基地局と相互に通信を行う複数の移動局とを備え、前記測定ステップは、前記基地局において受信する信号の干渉電力を測定することにより前記現在のトラフィック量を測定することを特徴とする請求項10ないし15のいずれか1項に記載のリソースの割り当て方法。
- 18【請求項18】 前記通信システムは、複数の基地局と、情報データ変調信号を拡散符号にて拡散することにより前記基地局と相互に通信を行う複数の移動局とを備え、前記測定ステップは、前記基地局の送信電力の総計を測定することにより前記現在のトラフィック量を測定することを特徴とする請求項10ないし15のいずれか1項に記載のリソースの割り当て方法。
- 19【請求項19】 端末から送信されるリソースの要求により、複数の通信によって共有されるリソースの割り当てを行う通信制御装置であって、 現在のトラフィック量または該トラフィック量に相当する量を測定する測定手段と、 該測定手段によって測定された前記現在のトラフィック量または該トラフィック量に相当する量と基準値とを比較することにより、前記リソースの要求を受付けるか否かを判定する第1の判定手段と、 該第1の判定手段による判定の結果に基づいて、前記リソースの要求を受付ける受付手段とを備えたことを特徴とする通信制御装置。
- 20【請求項20】 前記基準値は、前記端末から要求された前記リソースの量が大きいほど、前記リソースの要求の受付がより行われにくくなるように設定されることを特徴とする請求項19に記載の通信制御装置。
- 21【請求項21】 前記第1の判定手段により、前記リソースの要求を受付けないことと判定された場合、複数の通信が競合して共通に使用するリソースを使用することにより、前記端末どうしの通信を継続することを特徴とする請求項19または20に記載の通信制御装置。
- 22【請求項22】 前記現在のトラフィック量または該トラフィック量に相当する量が前記基準値をこえた場合、前記端末から要求された前記リソースの量を減らすことができるか否かを判定する第2の判定手段を備え、前記第1の判定手段は、前記第2の判定手段により前記リソース量を減らすことができると判定された場合に前記リソースの要求を受付けるか否かを判定することを特徴とする請求項19ないし21のいずれか1項に記載の通信制御装置。
- 23【請求項23】 前記第1の判定手段によって前記リソースの割り当ての要求を受付けることと判定された場合、要求された前記リソースに相当する空きリソースがあるかどうかを判定する第3の判定手段を備え、前記第2の判定手段は、前記第3の判定手段によって前記空きリソースがないと判定された場合に、前記リソース量を減らすことができるか否かを判定することを特徴とする請求項22に記載の通信制御装置。
- 24【請求項24】 前記第2の判定手段によって前記リソース量を減らすことができないと判定された場合、複数の通信が競合して共通に使用するリソースを使用することにより、前記端末どうしの通信を継続することを特徴とする請求項22または23に記載の通信制御装置。
- 25【請求項25】 前記通信制御装置は、複数の基地局と、無線チャネルを介して前記基地局と通信を行う移動局とにより構成される通信システムに適用され、前記測定手段は、前記基地局において現在使用中の無線チャネルを計数することにより前記現在のトラフィック量を測定することを特徴とする請求項19ないし24のいずれか1項に記載の通信制御装置。
- 26【請求項26】 前記通信制御装置は、複数の基地局と、情報データ変調信号を拡散符号にて拡散することにより前記基地局と通信を行う移動局とにより構成される通信システムに適用され、前記測定手段は、前記基地局において受信する信号の干渉電力を測定することにより前記現在のトラフィック量を測定することを特徴とする請求項19ないし24のいずれか1項に記載の通信制御装置。
- 27【請求項27】 前記通信制御装置は、複数の基地局と、情報データ変調信号を拡散符号にて拡散することにより前記基地局と通信を行う移動局とにより構成される通信システムに適用され、前記測定手段は、前記基地局の送信電力の総計を測定することにより前記現在のトラフィック量を測定することを特徴とする請求項19ないし24のいずれか1項に記載の通信制御装置。
- 28【請求項28】 端末から送信される複数の通信によって共有されるリソースの要求に基づく通信制御装置のリソースの割り当て方法であって、 現在のトラフィック量または該トラフィック量に相当する量を測定する測定ステップと、 該測定ステップにおいて測定された前記現在のトラフィック量または該トラフィック量に相当する量と基準値とを比較することにより、前記リソースの要求を受付けるか否かを判定する第1の判定ステップと、 該第1の判定ステップにおける判定の結果に基づいて、前記リソースの要求を受付ける受付ステップとを備えたことを特徴とする通信制御装置のリソースの割り当て方法。
- 29【請求項29】 前記基準値は、前記端末から要求された前記リソースの量が大きいほど、前記リソースの要求の受付がより行われにくくなるように設定されることを特徴とする請求項28に記載の通信制御装置のリソースの割り当て方法。
- 30【請求項30】 前記第1の判定ステップにおいて、前記リソースの要求を受付けないことと判定された場合、複数の通信が競合して共通に使用するリソースを使用することにより、前記端末どうしの通信を継続することを特徴とする請求項28または29に記載の通信制御装置のリソースの割り当て方法。
- 31【請求項31】 前記現在のトラフィック量または該トラフィック量に相当する量が前記基準値をこえた場合、前記端末から要求された前記リソースの量を減らすことができるか否かを判定する第2の判定ステップを備え、前記第1の判定ステップは、前記第2の判定ステップにおいて前記リソース量を減らすことができると判定された場合に前記リソースの要求を受付けるか否かを判定することを特徴とする請求項28ないし30のいずれか1項に記載の通信制御装置のリソースの割り当て方法。
- 32【請求項32】 前記第1の判定ステップにおいて前記リソースの割り当ての要求を受付けることと判定された場合、要求された前記リソースに相当する空きリソースがあるかどうかを判定する第3の判定ステップを備え、前記第2の判定ステップは、前記第3の判定ステップにおいて前記空きリソースがないと判定された場合に、前記リソース量を減らすことができるか否かを判定することを特徴とする請求項31に記載の通信制御装置のリソースの割り当て方法。
- 33【請求項33】 前記第2の判定ステップにおいて前記リソース量を減らすことができないと判定された場合、複数の通信が競合して共通に使用するリソースを使用することにより、前記端末どうしの通信を継続することを特徴とする請求項31または32に記載の通信制御装置のリソースの割り当て方法。
- 34【請求項34】 前記通信制御装置は、複数の基地局と、無線チャネルを介して前記基地局と通信を行う移動局とにより構成される通信システムに適用され、前記測定ステップは、前記基地局において現在使用中の無線チャネルを計数することにより前記現在のトラフィック量を測定することを特徴とする請求項28ないし33のいずれか1項に記載の通信制御装置のリソースの割り当て方法。
- 35【請求項35】 前記通信制御装置は、複数の基地局と、情報データ変調信号を拡散符号にて拡散することにより前記基地局と通信を行う移動局とにより構成される通信システムに適用され、前記測定ステップは、前記基地局において受信する信号の干渉電力を測定することにより前記現在のトラフィック量を測定することを特徴とする請求項28ないし33のいずれか1項に記載の通信制御装置のリソースの割り当て方法。
- 36【請求項36】 前記通信制御装置は、複数の基地局と、情報データ変調信号を拡散符号にて拡散することにより前記基地局と通信を行う移動局とにより構成される通信システムに適用され、前記測定ステップは、前記基地局の送信電力の総計を測定することにより前記現在のトラフィック量を測定することを特徴とする請求項28ないし33のいずれか1項に記載の通信制御装置のリソースの割り当て方法。
Independent claims36
191 paragraphs in 1 section, as filed
Description: TECHNICAL FIELD [Detailed description of the invention]
【0001】
[Technical field to which the invention belongs]
The present invention relates to a communication system, a resource allocation method thereof, and a communication control device. More specifically, a resource for communication is secured when a communication request is generated, and the resource is released when the communication is completed. The present invention relates to a communication system in which a plurality of communications share the same resource and the amount of resources required differs for each communication, and a resource allocation method that can improve the resource sharing efficiency in the communication system.
【0002】
[Conventional technology]
In a communication system in which a large number of users communicate with each other, the communication circuit in the switchboard, the capacity of a cable or wireless line for relay, or in a mobile communication system in which the user communicates with a base station while moving, the mobile station Various resources for communication are required, such as a wireless channel used for communication between the base station and the base station. Then, for each communication system, it is required for system design to prepare an amount of resources corresponding to the number of users.
【0003】
Normally, the probability that all a large number of users will communicate at the same time is very low and almost negligible, so it is not necessary to prepare enough resources for all a large number of users to communicate at the same time. However, when a communication request occurs in excess of the amount of resources prepared in advance, a so-called call loss occurs, which is not accepted by the system even though the communication is desired. In system design, the amount of resources is usually determined so that the rate at which this call loss occurs (call loss rate) is a sufficiently small probability of about 1% to several%. Since such a system design is described in detail in, for example, literature (L. Kleinrock, "Queuing systems Volume I: Theory," John Wiley & Sons, 1975), the description thereof is omitted here.
【0004】
In recent years, communication, which used to be mainly voice, has diversified into various forms such as video communication and data communication, and communication requirements have diversified, and the amount of resources required for communication is not always constant. Instead, various amounts of resources have come to be required. However, although each small resource is released and becomes free, it is difficult to secure free resources because the probability that many of them will gather and become a large free resource is small. Therefore, there is a problem that communication that requires a lot of resources is prone to call loss.
【0005】
In order to solve such problems and make the call loss rate fair, a method such as securing a certain amount of resources in advance is often adopted. For example, Japanese Patent Application Laid-Open No. 11-41239 Method for controlling call reception of multiple traffic does not accept a new resource request when the number of resources currently in use exceeds a certain threshold value. The method of fairening the call loss rate is explained in detail by taking the simple method of.
【0006】
Such system design is also carried out in the rapidly developing mobile communication system in recent years. In mobile communication systems, wireless channels are used for communication between mobile stations and base stations. Generally, the radio band that can be used by a mobile communication system is limited, so that a more rigorous design is required for the amount of resources.
【0007】
Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), and Code Division Multiple Access (CDMA) are the methods of wireless access used in mobile communication systems. )and so on. In the FDMA and TDMA methods, the current traffic can be known by counting the number of wireless channels and the number of time slots currently in use, and as already explained, the design method adopted in the fixed telephone network is applied. can do.
【0008】
On the other hand, in the CDMA system, the number of radio channels cannot be counted, but as described in detail in the publication of International Publication No. WO98 / 30057, the interference power in the base station and the total transmission power of the base station are measured. By doing so, the traffic at the base station can be known, and the conventional design method and the method for multiple access can be applied.
【0009】
As described above, various system design and traffic control methods in consideration of multiple traffic have been conventionally applied to various communication systems.
【0010】
[Problems to be Solved by the Invention]
However, the traffic control method that has been conventionally adopted cannot avoid the problem that the resource sharing efficiency is lowered under the situation of multiple traffic. In general, when compared under the condition that the call loss rates are equal, the larger the resources used by one communication, the lower the resource utilization rate. This is a phenomenon that occurs for the same reason as the so-called horde effect, in which the more resources that can be used as a whole, the higher the utilization rate of the entire resource, regardless of the size of the resources used in one communication. ..
【0011】
In this way, the conventional design method for multiple traffic and the traffic control method disclosed in Japanese Patent Application Laid-Open No. 11-41239 can make the call loss rate fair, but many communications require a lot of resources. If this happens, there is a problem that the resource utilization rate as a whole decreases.
【0012】
The present invention has been made in view of such a problem, and an object of the present invention is to provide resources as a whole even if there are many communications that require a large amount of resources under the condition of multiple traffic. It is an object of the present invention to provide a communication system, a resource allocation method thereof, and a communication control device capable of maintaining the utilization rate of the above.
【0013】
[Means for solving problems]
In order to achieve such an object, the invention according to claim 1 allocates resources shared by a plurality of communications in response to a request for resources transmitted from the first node. The second node is a mobile communication system including the above-mentioned node, wherein the second node is a measuring means for measuring the current traffic amount or an amount corresponding to the traffic amount, and the current traffic amount measured by the measuring means. Alternatively, based on the first determination means for determining whether or not to accept the request for the resource by comparing the amount corresponding to the traffic amount with the reference value, and the result of the determination by the first determination means. It is characterized in that it is provided with a receiving means for receiving a request for the resource.
【0014】
Therefore, in a communication system in which the required amount of resources differs for each communication, it is possible to allocate resources that can improve the resource sharing efficiency.
【0015】
Further, in the invention according to claim 2, in the communication system according to claim 1, the reference value is such that the larger the amount of the resource requested from the first node, the more the request for the resource is received. It is characterized in that it is set so as to be more difficult to perform.
【0016】
Therefore, in a communication system in which multiple communications share the same resource, the current traffic or the equivalent amount is measured, and the larger the requested resource is, the more the threshold value is based on the amount of newly requested resources. The threshold value for acceptance judgment is determined based on the criteria that lowers the value, and if the measured current traffic exceeds the determined threshold value, it is determined that new resource requests cannot be accepted. can do.
【0017】
Further, in the invention according to claim 3, when it is determined by the first determination means that the request for the resource is not accepted in the communication system according to claim 1 or 2, a plurality of communications compete with each other. It is characterized in that communication is continued by using resources that are commonly used.
【0018】
By such a method, it is possible to configure the communication itself so that the communication itself can be continued even if the resources to be exclusively allocated are not allocated.
【0019】
Further, the invention according to claim 4 is the communication system according to any one of claims 1 to 3, when the current traffic amount or the amount corresponding to the traffic amount exceeds the reference value. A second determination means for determining whether or not the amount of the resource requested from the first node can be reduced is provided, and the first determination means is the resource amount by the second determination means. It is characterized in that it is determined whether or not to accept the request of the resource when it is determined that the number can be reduced.
【0020】
Therefore, when it is determined that the second node cannot accept the request, the requested resource amount can be reduced and the resource allocation can be requested again.
【0021】
Further, the invention according to claim 5 corresponds to the requested resource when it is determined by the first determination means that the request for allocation of the resource is accepted in the communication system according to claim 4. A third determination means for determining whether or not there are free resources to be used is provided, and the second determination means reduces the amount of the resources when the third determination means determines that there are no free resources. It is characterized in that it is determined whether or not it is possible.
【0022】
Therefore, when it is determined that acceptance is possible, it is possible to check whether or not there are free resources for the requested resource, and if there is no free resource, it is possible to determine that acceptance is not possible.
【0023】
Further, in the invention according to claim 6, when it is determined that the resource amount cannot be reduced by the second determination means in the communication system according to claim 4 or 5, a plurality of communications compete with each other. It is characterized in that communication is continued by using resources that are commonly used.
【0024】
Therefore, when it is determined that acceptance is not possible, communication can be continued by using resources that are commonly used by a plurality of communications competing with each other.
【0025】
The invention according to claim 7 is the communication system according to any one of claims 1 to 6, wherein the communication system interacts with a plurality of base stations and the base stations via a wireless channel. A plurality of mobile stations that communicate with each other are provided, and the measuring means measures the current traffic volume by counting the radio channels currently in use in the communication system.
【0026】
Therefore, it is possible to measure the current traffic even in a mobile communication system using the FDMA method or the TDMA method.
【0027】
The invention according to claim 8 is the communication system according to any one of claims 1 to 6, wherein the communication system spreads information data modulation signals with a plurality of base stations by a spreading code. The base station is provided with a plurality of mobile stations that communicate with each other, and the measuring means measures the current traffic volume by measuring the interference power of a signal received by the base station. And.
【0028】
Therefore, even in a mobile communication system based on the CDMA system, the current traffic can be measured by measuring the interference power received by the wireless base station.
【0029】
The invention according to claim 9 is the communication system according to any one of claims 1 to 6, wherein the communication system spreads information data modulation signals with a plurality of base stations by a spreading code. A plurality of mobile stations that communicate with each other with the base station are provided, and the measuring means measures the current traffic volume by measuring the total transmission power of the base station. ..
【0030】
Therefore, even in a mobile communication system based on the CDMA system, the current traffic can be measured by measuring the total transmission power of the wireless base station.
【0031】
The invention according to claim 10 is a method of allocating resources of a communication system performed in a second node based on a request for resources shared by a plurality of communications transmitted from the first node. By comparing the measurement step for measuring the current traffic amount or the amount corresponding to the traffic amount with the reference value with the current traffic amount or the amount corresponding to the traffic amount measured in the measurement step. It is characterized by including a first determination step for determining whether or not to accept a request for the resource, and a reception step for accepting a request for the resource based on the result of determination in the first determination step. ..
【0032】
Further, in the invention according to claim 11, in the resource allocation method according to claim 10, the reference value is such that the larger the amount of the resource requested from the first node, the more the resource request is made. The feature is that the reception is set so that it is less likely to be performed.
【0033】
Further, the invention according to claim 12 has a plurality of communications when it is determined in the first determination step that the request for the resource is not accepted in the resource allocation method according to claim 10 or 11. It is characterized in that communication is continued by competing with each other and using resources that are commonly used.
【0034】
Further, in the invention according to claim 13, in the resource allocation method according to any one of claims 10 to 12, the current traffic amount or the amount corresponding to the traffic amount exceeds the reference value. In the case, the second determination step for determining whether or not the amount of the resource requested from the first node can be reduced is provided, and the first determination step is the said in the second determination step. When it is determined that the amount of resources can be reduced, it is determined whether or not to accept the request for the resource.
【0035】
Further, the invention according to claim 14 is the requested resource when it is determined in the first determination step that the request for allocation of the resource is accepted in the resource allocation method according to claim 13. A third determination step for determining whether or not there is a free resource corresponding to is provided, and the second determination step is the resource amount when it is determined in the third determination step that there is no free resource. It is characterized in that it is determined whether or not it is possible to reduce.
【0036】
Further, in the invention according to claim 15, when it is determined in the second determination step that the resource amount cannot be reduced in the resource allocation method according to claim 13 or 14, a plurality of communications are performed. It is characterized in that communication is continued by using resources that are commonly used in competition.
【0037】
The invention according to claim 16 is the method for allocating resources according to any one of claims 10 to 15, wherein the communication system has a plurality of base stations and the base station via a wireless channel. It comprises a plurality of mobile stations communicating with each other, and the measurement step measures the current traffic volume by counting the radio channels currently in use in the communication system.
【0038】
The invention according to claim 17 is the method for allocating resources according to any one of claims 10 to 15, wherein the communication system uses a plurality of base stations and an information data modulation signal in a spread code. A plurality of mobile stations that communicate with each other by spreading are provided, and the measurement step measures the current traffic volume by measuring the interference power of a signal received at the base station. It is characterized by.
【0039】
Further, the invention according to claim 18 is the method for allocating resources according to any one of claims 10 to 15, wherein the communication system uses a plurality of base stations and an information data modulation signal in a spread code. It comprises a plurality of mobile stations that communicate with the base station by spreading, and the measurement step measures the current traffic volume by measuring the total transmission power of the base station. And.
【0040】
The invention according to claim 19 is a communication control device that allocates resources shared by a plurality of communications in response to a request for resources transmitted from a terminal, and corresponds to the current traffic volume or the traffic volume. By comparing the measuring means for measuring the amount to be measured with the current traffic amount measured by the measuring means or the amount corresponding to the traffic amount and the reference value, it is determined whether or not the request for the resource is accepted. It is characterized in that it is provided with a first determination means to be used, and a reception means for accepting a request for the resource based on the result of determination by the first determination means.
【0041】
Further, in the invention according to claim 20, in the communication control device according to claim 19, the reference value is such that the larger the amount of the resource requested from the terminal, the more the request for the resource is accepted. The feature is that it is set so as to be hard to break.
【0042】
Further, in the invention according to claim 21, when the communication control device according to claim 19 or 20 determines that the request for the resource is not accepted by the first determination means, a plurality of communications are performed. It is characterized in that communication between the terminals is continued by using resources that are commonly used in competition.
【0043】
The invention according to claim 22 is the case where the current traffic amount or the amount corresponding to the traffic amount exceeds the reference value in the communication control device according to any one of claims 19 to 21. A second determination means for determining whether or not the amount of the resource requested from the terminal can be reduced is provided, and the first determination means reduces the amount of the resource by the second determination means. It is characterized in that it is determined whether or not to accept the request of the resource when it is determined that the request can be made.
【0044】
Further, the invention according to claim 23 applies to the requested resource when it is determined by the first determination means that the communication control device according to claim 22 accepts the request for allocation of the resource. A third determination means for determining whether or not there is a corresponding free resource is provided, and the second determination means determines the amount of the resource when the third determination means determines that there is no free resource. It is characterized in determining whether or not it can be reduced.
【0045】
Further, in the invention according to claim 24, when it is determined in the communication control device according to claim 22 or 23 that the resource amount cannot be reduced by the second determination means, a plurality of communications compete with each other. It is characterized in that communication between the terminals is continued by using the commonly used resources.
【0046】
The invention according to claim 25 is the communication control device according to any one of claims 19 to 24, wherein the communication control device includes a plurality of base stations and the base station via a wireless channel. Applied to a communication system composed of a mobile station that communicates, the measuring means measures the current traffic volume by counting the radio channels currently in use at the base station.
【0047】
The invention according to claim 26 is the communication control device according to any one of claims 19 to 24, wherein the communication control device uses a plurality of base stations and an information data modulation signal in a diffusion code. It is applied to a communication system composed of a mobile station that communicates with the base station by spreading, and the measuring means measures the current traffic amount by measuring the interference power of a signal received at the base station. It is characterized by measuring.
【0048】
The invention according to claim 27 is the communication control device according to any one of claims 19 to 24, wherein the communication control device uses a plurality of base stations and an information data modulation signal in a diffusion code. It is applied to a communication system composed of a mobile station that communicates with the base station by spreading, and the measuring means measures the current traffic volume by measuring the total transmission power of the base station. It is characterized by that.
【0049】
The invention according to claim 28 is a method of allocating resources of a communication control device based on a request for resources shared by a plurality of communications transmitted from a terminal, and corresponds to the current traffic amount or the traffic amount. By comparing the measurement step for measuring the amount to be performed with the current traffic amount measured in the measurement step or the amount corresponding to the traffic amount and the reference value, it is determined whether or not the request for the resource is accepted. It is characterized in that it includes a first determination step to be performed, and a reception step for accepting a request for the resource based on the determination result in the first determination step.
【0050】
Further, according to the invention of claim 29, in the method of allocating resources of the communication control device according to claim 28, the reference value is such that the larger the amount of the resource requested from the terminal, the more the resource is requested. It is characterized in that it is set so that the reception of is less likely to be performed.
【0051】
Further, the invention according to claim 30 is the case where it is determined in the first determination step that the request for the resource is not accepted in the resource allocation method of the communication control device according to claim 28 or 29. It is characterized in that communication between the terminals is continued by using resources that are commonly used by a plurality of communications competing with each other.
【0052】
Further, in the invention according to claim 31, in the method for allocating resources of the communication control device according to any one of claims 28 to 30, the current traffic amount or the amount corresponding to the traffic amount is the reference. When the value is exceeded, a second determination step for determining whether or not the amount of the resource requested by the terminal can be reduced is provided, and the first determination step is the second determination step. When it is determined that the amount of the resource can be reduced, it is determined whether or not the request for the resource is accepted.
【0053】
Further, the invention according to claim 32 is requested when it is determined in the first determination step that the request for allocation of the resource is accepted in the method for allocating resources of the communication control device according to claim 31. A third determination step for determining whether or not there is a free resource corresponding to the said resource is provided, and the second determination step is when it is determined in the third determination step that there is no free resource. It is characterized in that it is determined whether or not the amount of the resource can be reduced.
【0054】
Further, according to the invention of claim 33, when it is determined in the second determination step that the resource amount of the communication control device according to claim 31 or 32 cannot be reduced, the resource amount cannot be reduced. It is characterized in that communication between the terminals is continued by using resources that are commonly used by a plurality of communications competing with each other.
【0055】
The invention according to claim 34 is the method for allocating resources of the communication control device according to any one of claims 28 to 33, wherein the communication control device is provided via a plurality of base stations and a wireless channel. Applied to a communication system composed of a mobile station communicating with the base station, the measurement step measures the current traffic volume by counting the radio channels currently in use at the base station. It is characterized by.
【0056】
The invention according to claim 35 is the method for allocating resources of the communication control device according to any one of claims 28 to 33, wherein the communication control device includes a plurality of base stations and an information data modulation signal. Is applied to a communication system composed of a mobile station that communicates with the base station by spreading the above with a spreading code, and the measurement step is performed by measuring the interference power of a signal received at the base station. It is characterized by measuring the current traffic volume.
【0057】
The invention according to claim 36 is the method for allocating resources of the communication control device according to any one of claims 28 to 33, wherein the communication control device includes a plurality of base stations and an information data modulation signal. Is applied to a communication system composed of a mobile station that communicates with the base station by spreading with a spreading code, and the measurement step is the current measurement by measuring the total transmission power of the base station. It is characterized by measuring the amount of traffic.
【0058】
By adopting such a configuration, when the traffic exceeds a certain amount, it acts to start the communication after reducing the resources used for the communication requiring a large amount of resources. , The resource utilization rate as a whole does not decrease due to the existence of communication that uses a large amount of resources.
【0059】
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
【0060】
(First Embodiment) FIG. 1 is a diagram showing a communication system to which the resource allocation method of the present invention is applied. In FIG. 1, as an example, a fixed telephone network such as a general household and a mobile communication system are shown together. For example, a case where a mobile station 102 belonging to a mobile communication system makes a call to a telephone 104 of a general household belonging to a fixed telephone network will be described as an example. Mobile station 102 requests base station 101-b to allocate the resources required for communication.
【0061】
In a mobile communication system, a control station 107 that controls the operation of a plurality of wireless base stations determines a route required for connecting a base station 101 (101-a, 101-b, 101-c) to a fixed telephone. , Control the allocation of lines in each route. Under the control of the control station 107, the base station 101-b is connected to the fixed telephone network via the barrier exchange stations 105-a and 105-b, and the route within the fixed telephone network is determined. The target telephone 104 is reached via the exchanges 103-b and 103-d. Various resources are required on the above-mentioned route from the mobile station 102 to the fixed telephone 104. For example, the radio channel between the mobile station 102 and the radio base station 101, the resources on the transmission line from the base station 101 to the switching station 103-a, the transmission line resources between each switching station 103, and each node described above. Hardware resources on (including the above-mentioned base station 101, exchange 103, barrier exchange 105, and control station 107, which are connection points that can access the network).
【0062】
The resource allocation according to the present embodiment can be applied to each node by configuring the traffic measurement on each node shown in FIG. At that time, the resource allocation request issued from the user's terminal may be used as it is, or each node may independently calculate the required resource and issue the resource allocation request to the connected node. ..
【0063】
FIG. 2 is a flowchart for explaining a resource allocation method of the communication system according to the present embodiment. First, the current traffic volume is measured (step S201), and then the threshold value (reference value) is determined based on the requested resource volume (step S203). Then, the current traffic volume is compared with the threshold value, and it is determined whether or not to accept the resource request (step S205). That is, if the measured traffic exceeds this threshold value, it is determined that the reception is not possible, and the processing is terminated. On the other hand, if the measured traffic is below the threshold value, it is determined that the reception is possible, and the resource request is accepted. After performing the processing, the processing is terminated (step S207).
【0064】
FIG. 3 is a diagram for explaining in detail an example of the operation of the part that determines the threshold value in FIG. 1, (a) is the operation flow, and (b) is the data used in the process in the memory. It is a figure which shows each of the stored state.
【0065】
First, the requested resource amount N is acquired based on the information sent from the user (step S301). Next, the variable i is initialized to 1 (step S303), and N from the memory.<sub>i</sub>To get. And request resources N and N<sub>i</sub>Compare (step S305), and if N is smaller, N<sub>i</sub>Threshold THR corresponding to<sub>i</sub>Is obtained from the memory and the process is terminated (step S307). On the other hand, N is N<sub>i</sub>If so, increase i by 1 (step S309) and compare i with the maximum value M (step S311).
【0066】
As a result of comparison, if i does not reach the maximum value M, the next process is continued. If the maximum value M is reached, the threshold THR from memory<sub>M + 1</sub>Is acquired, and the process ends (step S313).
【0067】
Although an example of the operation of determining the threshold value is shown here, the present invention is not limited to this embodiment. For example, in addition to the method described in Fig. 3, the threshold THR may be calculated by a mathematical formula such as THR = C1 N × C2 using the requested traffic volume N, constants C1 and C2. Good. Regardless of which method is adopted, the same effect can be obtained as long as the threshold value THR is set as the requested traffic volume N is larger and the resource request is less likely to be accepted. ..
【0068】
(Second Embodiment) In the above-described embodiment, the resource allocation process is terminated when the current traffic volume exceeds the threshold value, but the resource allocation process is completed when the requested resource volume can be reduced. May be repeated.
【0069】
FIG. 4 is a flowchart for explaining the operation in another embodiment of the present invention. First measure the current traffic volume and then determine the threshold (steps S401 and S403). The method of determining the threshold value can be configured as shown in FIG. 3, for example.
【0070】
The determined threshold is then compared to the measured traffic volume (step S405). Then, if the measured traffic amount is equal to or less than the threshold value, it is determined that acceptance is possible, the acceptance processing of the resource request is executed, and the processing is terminated (step S407). On the other hand, if the measured traffic exceeds the threshold, it is determined whether the requested resource amount can be reduced (step S409). Here, if the required resource amount cannot be reduced, for example, if the user specifies a unique transmission speed and does not want to communicate at any other speed, the lowest transmission already provided in the system. It is possible that the speed has been reached and it is not possible to further reduce resources.
【0071】
If it is determined that the required resource amount cannot be reduced in the determination process of step S409, the process is terminated as it is. On the other hand, if it is determined that the requested resource amount can be reduced, the process returns to step S403, the threshold value is set again, and the process proceeds to step S405 to continue the determination process of whether or not to accept the resource request.
【0072】
(Third Embodiment) In the above-described embodiment, a case where it is determined whether or not the requested resource amount can be reduced only when the current traffic amount exceeds the threshold value has been described. However, this determination process has been described. Is not limited to the above case, and can be performed when there is no free resource for the requested resource.
【0073】
FIG. 5 is a flowchart for explaining the operation in another embodiment of the present invention. First, the current traffic volume is measured, and then the threshold is determined (steps S501 and S503). The method of determining the threshold value can be configured as shown in FIG. 3, for example. Next, a comparison process is performed between the determined threshold value and the measured traffic volume (step S505), and if the measured traffic volume is less than the threshold value, it is determined that acceptance is possible, and then free resources are available. Move to check. That is, it checks whether there is a free resource corresponding to the currently requested resource (step S507).
【0074】
As a result of the check in step S507, if there is a vacancy, the resource request is accepted and the process is terminated (step S509). On the other hand, if there is no vacancy, it is judged that acceptance is not possible, and the process proceeds to check whether the requested resource amount can be reduced (step S511). If the measured traffic exceeds the threshold, determine if the requested resource amount can be reduced (step S511). Here, if the required resource amount cannot be reduced, for example, if the user specifies a unique transmission speed and does not want to communicate at any other speed, the lowest transmission already provided in the system. The situation may be such that the speed has been reached and no further resource reduction can be achieved.
【0075】
In this determination process, if it is determined that the required resource amount cannot be reduced, the process is terminated as it is, and if it is determined that the requested resource amount can be reduced, the threshold setting is returned again and the process is continued.
【0076】
By performing the above processing, for example, the types of transmission speeds provided by the system are transmission speed 1, transmission speed 2, and transmission speed 3 (transmission speed 1> transmission speed 2> transmission speed 3). When it is a type, the operation as shown in the example of FIG. 6 can be realized. If the total traffic volume does not reach a certain amount, first try to allocate at transmission speed 1 (step S601 and step S603). Here, if the allocation is not possible, the transmission speed is reduced and the allocation at the transmission speed 2 is attempted. Furthermore, if the total traffic volume is low to some extent, the allocation at transmission speed 2 is attempted (step S607 and step S609). Then, if the allocation is not possible, the transmission speed is further reduced and the allocation at the transmission speed 3 is attempted (step S613 and step S615). Ultimately, if all of them cannot be assigned, it will be a call loss.
【0077】
In the explanation of the operation with reference to FIGS. 2 and 4 to 6, it was explained that the process is terminated when it is determined that the resource request cannot be accepted, but this makes it impossible to continue the communication itself. It doesn't mean that. In many communication systems, one user provides a communication mode in which a certain resource is exclusively used, and on the other hand, a plurality of users compete with each other and use it in common without occupying a resource. It often provides a communication mode in which communication is performed by using resources.
【0078】
In such resource sharing, for example, random access such as ALOHA method, or a method of freely sending data if another user's carrier is not detected, as seen in a local area network (LAN), etc. Often adopted. The technique of sharing resources while competing with multiple users is explained in detail in the literature (L. Kleinrock, "Queuing Systems Volume II: Computer Applications," John Wiley & Sons, 1976). The explanation will be omitted. By such a method, even if the resources to be occupied are not allocated, the communication itself can be continued by using the resources that are commonly used by multiple communications competing with each other. Can be.
【0079】
In addition, various methods can be applied to the method of measuring the current traffic in the description of the operation with reference to FIGS. 2 and 4 to 6. As already explained, in a fixed communication network that connects exchanges with wires or optical fibers, the number of lines in use at each exchange can be measured or used in transmission lines (wires or optical fibers). It is possible to measure the current traffic by a method such as measuring the number of lines or measuring the amount of information being transmitted.
【0080】
Further, in a mobile communication system using the FDMA system or the TDMA system in which a plurality of base stations and mobile stations communicate with each other via wireless channels, the number of wireless channels in use at each wireless base station is measured. You can measure the current traffic by measuring the number of wireless slots in use.
【0081】
Further, in a mobile communication system based on a CDMA system in which a plurality of base stations and a plurality of mobile stations communicate with each other by spreading an information data modulated signal with a spreading code having a higher rate, each radio base station The current traffic can be measured by measuring the interference power of the signal received by the base station or by measuring the total transmission power of the signal transmitted by the base station.
【0082】
Whatever measurement method is used, the present invention can be applied as long as it measures a value indicating the state of load on the system at the time of measurement, and the same effect as that of the present invention can be obtained. Further, as the measured value of the traffic, the measured value may be used as it is, the measured value may be processed, or an amount corresponding to the current traffic such as an average value calculated based on the measured value may be used. It is also possible.
【0083】
For example, in a normal communication system, a method of counting the number of lines in use every few seconds and averaging the series of measured values obtained by the counting over several minutes is often adopted. In this way, values averaged over a longer period of time, such as several minutes or several tens of minutes, may be used.
【0084】
In addition, as an operation similar to averaging, the result of passing a filter that removes short-term fluctuation components or, conversely, a filter that removes long-term fluctuation components and extracts short-term fluctuations is used. You may. Alternatively, the median value of a plurality of measured values obtained within a certain period may be used, or the statistical value located in a predetermined order when arranged in descending order may be used.
【0085】
[Effect of the invention]
As described in detail above, according to the present invention, in a communication system in which resources are shared by a plurality of users, the resource utilization of the entire system is used even under the so-called multi-dimensional traffic situation in which the required resource amount differs for each communication. It is possible to provide a resource allocation method that does not cause a decrease in the rate.
[Simple explanation of drawings]
[Figure 1]
It is a figure which shows the communication system to which the resource allocation method of this invention is applied.
[Figure 2]
It is a flowchart for demonstrating the operation which concerns on one Embodiment of this invention.
[Fig. 3]
In FIG. 1, a diagram for explaining in detail an example of the operation of the part that determines the threshold value, (a) is the operation flow, and (b) is the data used in the process is stored in the memory. It is a figure which shows each state.
[Fig. 4]
It is a flowchart for demonstrating the operation which concerns on one Embodiment of this invention.
[Fig. 5]
It is a flowchart for demonstrating the operation which concerns on one Embodiment of this invention.
[Fig. 6]
It is a flowchart for demonstrating the operation which concerns on one Embodiment of this invention.
[Explanation of symbols]
101-a, 101-b, 101-c wireless base station 102 Wireless mobile station 103-a, 103-b, 103-c, 103-d, 103-e Exchange 104 phone 105-a, 105-b Barrier Exchange 107 Control station
3 sheets
Sheet 1 Sheet 2 Sheet 3
Every citation, both ways
| Document | Relation | Office | Cited during |
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| US7388832B2 | Cited by | United States of America | Applicant |
| JP4842968B2 | Cited by | Japan | Examiner |
| JP2017038119A | Cited by | Japan | Search report |
| WO2024021921A1 | Cited by | World Intellectual Property Organization (WIPO) | International search |
| JP2017038119A | Cited by | Japan | Search report |
14 members in 7 offices
Priority claims7
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| 2000302733(P2000302733) | Japan | – | |
| 2000302733 | Japan | A | |
| 2000302733 | Japan | A | |
| 2001306456 | Japan | A | |
| 20002000302733 | – | – | – |
| JP20000302733 | – | – | – |
| JP20010306456 | – | – | – |
Members14
| Document | Office | Kind | |
|---|---|---|---|
| EP1193992A2 | European Patent Office (EPO) | A2 | |
| KR20020027226A | Republic of Korea | A | |
| US2002068579A1 | United States of America | A1 | |
| JP2002190830AThis record | Japan | A | |
| CN1364038A | China | A | |
| EP1193992A3 | European Patent Office (EPO) | A3 | |
| KR100428744B1 | Republic of Korea | B1 | |
| CN1156180C | China | C | |
| EP1193992B1 | European Patent Office (EPO) | B1 | |
| DE60110010D1 | Germany | D1 | |
| US6947751B2 | United States of America | B2 | |
| DE60110010T2 | Germany | T2 | |
| SG116430A1 | Singapore | A1 | |
| JP3883406B2 | Japan | B2 |
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| Event | Code | |
|---|---|---|
| Cancellation because of no payment of annual feesLAPS | LAPS | |
| Renewal fee payment (event date is renewal date of database)FPAY | FPAY | |
| Renewal fee payment (event date is renewal date of database)FPAY | FPAY | |
| Renewal fee payment (event date is renewal date of database)FPAY | FPAY | |
| Renewal fee payment (event date is renewal date of database)FPAY | FPAY | |
| First payment of annual fees (during grant procedure)JAPANESE INTERMEDIATE CODE: A61A61 | A61 | |
| Certificate of patent or registration of utility modelJAPANESE INTERMEDIATE CODE: R150R150 | R150 | |
| Written decision to grant a patent or to grant a registration (utility model)JAPANESE INTERMEDIATE CODE: A01A01 | A01 | |
| Decision of grant or rejection writtenTRDD | TRDD | |
| Written amendmentJAPANESE INTERMEDIATE CODE: A523A521 | A521 | |
| Notification of reasons for refusalJAPANESE INTERMEDIATE CODE: A131A131 | A131 | |
| Report on retrievalJAPANESE INTERMEDIATE CODE: A971007A977 | A977 | |
| Written request for application examinationJAPANESE INTERMEDIATE CODE: A621A621 | A621 | |
| Notification of resignation of power of attorneyJAPANESE INTERMEDIATE CODE: A7424RD04 | RD04 |
Numbers
- Publication
- 2002-190830
- Publication, DOCDB
- 2002190830
- Publication, EPODOC
- JP2002190830
- Application
- 306456
- Application, DOCDB
- 2001306456
- Application, EPODOC
- JP20010306456
Titles2
- Japanese
- 【発明の名称】通信システムおよびそのリソース割り当て方法並びに通信制御装置
- English
- Description: A communication system, a resource allocation method thereof, and a communication control device.
Classification
- CPC, 2
- H04W72/04
- H04W4/24
- IPC, 3
- H04L12 28
- H04L12 911
- H04M3 00