WO2010024335A1 - 無線基地局装置及び無線通信方法 - Google Patents
無線基地局装置及び無線通信方法 Download PDFInfo
- Publication number
- WO2010024335A1 WO2010024335A1 PCT/JP2009/064966 JP2009064966W WO2010024335A1 WO 2010024335 A1 WO2010024335 A1 WO 2010024335A1 JP 2009064966 W JP2009064966 W JP 2009064966W WO 2010024335 A1 WO2010024335 A1 WO 2010024335A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- communication
- radio
- wireless communication
- wireless
- communication device
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
Definitions
- the present invention relates to a radio base station apparatus that performs radio communication with a plurality of radio communication apparatuses and a radio communication method for the radio base station apparatus.
- a frame is time-divisioned and a pair of time slots for time division are used. Wireless communication is performed using reception time slots.
- a time slot is an example of a radio resource.
- FIG. 9 shows an example of a TDMA communication frame configuration.
- wireless communication is performed between the wireless base station device and the wireless communication device by occupying the channel (time slot in each communication frame) regardless of the contents of the application used by the user. That is, the number of users that can be accommodated per base station cannot be increased.
- the above-described wireless communication system for high-grade (rank) users who need to provide high-quality services such as a difference in user rank due to a contract between a user and a telecommunications carrier and few voice interruptions In this case, a desired service cannot be provided without securing a time slot.
- a wireless communication system in which a larger number of mobile stations than the number of slots per frame is simultaneously accessed has been proposed in the prior art (see Patent Document 1).
- Patent Document 1 does not describe a technique for appropriately allocating time slots when a user desires a predetermined communication rate in advance.
- the frequency of time slot allocation for each user is half that of one user, and half-rate communication that performs communication at half the normal transmission rate (full rate), or the frequency of time slot allocation is one user.
- the quarter rate communication set to 1 ⁇ 4 of the case of the above case, when the time slots are intermittently assigned to the wireless communication device in advance, it is not considered to combine the communication. For this reason, there has been a problem that radio resources cannot be used effectively.
- Patent Document 2 can perform wireless communication using a plurality of time slots only when there is an empty time slot, and when there is no assignable time slot, Wireless communication using a plurality of time slots cannot be performed. For this reason, there has been a problem that wireless communication with an appropriate amount of data according to the application to be used cannot be performed.
- An object of the present invention is to consider the communication status of a wireless communication device in order to effectively use wireless resources when performing wireless communication with a plurality of wireless communication devices.
- An object of the present invention is to provide a radio base station apparatus and a radio communication method for allocating a plurality of radio communication apparatuses to radio resources at positions.
- Another object of the present invention is to provide a radio base station apparatus and a radio communication method capable of performing radio communication with an appropriate amount of data according to the application to be used even when there is no assignable radio resource. It is to provide.
- radio resources for example, time slots, resources, etc.
- the information acquisition unit for acquiring information on the communication status of the wireless communication device during wireless communication, and a predetermined number of A detection unit that detects a radio communication device to which radio resources are allocated for each communication frame, and the radio resource allocation unit performs the same radio for a plurality of the radio communication devices detected by the detection unit.
- Resources are allocated intermittently for each predetermined number of communication frames.
- the radio resource allocation unit allocates radio resources to the radio communication device for each predetermined number of communication frames based on a communication type of the radio communication device when a channel establishment request is made from the radio communication device.
- wireless resource allocation part allocates the said radio
- wireless resource allocation part allocates the same radio
- the radio base station apparatus when the radio resource allocation unit allocates radio resources to the radio communication apparatus in radio communication for each predetermined number of communication frames, a modulation scheme of radio communication performed with the allocated radio resources, It is preferable to further include a modulation scheme control unit that changes to a modulation scheme that provides a higher communication rate than the modulation scheme of the wireless communication before allocating the radio resource.
- radio in a radio communication method of a radio base station apparatus that performs radio communication with a plurality of radio communication apparatuses, radio that allocates radio resources to the radio communication apparatus that performs radio communication
- a radio resource is allocated for each predetermined number of communication frames based on a resource allocation step, an information acquisition step of acquiring information related to the communication status of the wireless communication device during wireless communication, and the information acquired in the information acquisition step
- a detection step of detecting a wireless communication device and a step of controlling the plurality of wireless communication devices detected in the detection step so as to intermittently allocate the same wireless resource for each predetermined number of communication frames.
- a first radio that allocates radio resources included in a communication frame to the radio communication apparatus.
- a wireless communication control unit that executes the wireless communication with the wireless communication device using the wireless resource allocated by the resource allocating unit, the first wireless resource allocating unit, and the wireless communication control unit
- the communication status information acquisition unit for acquiring information related to the communication status for the wireless communication device currently in communication, and the radio resources based on the information acquired by the communication status information acquisition unit.
- a first wireless communication device detection unit for detecting a first wireless communication device to be intermittently opened; and a first wireless communication device detected by the first wireless communication device detection unit.
- a radio resource allocation control unit that intermittently releases radio resources for the device every predetermined number of communication frames, and a second radio to which radio resources adjacent to the radio resources released by the radio resource allocation control unit are allocated
- a second wireless communication device detection unit for detecting a communication device; information indicating a type of communication to the second wireless communication device detected by the second wireless communication device detection unit; and the second wireless communication device
- a communication information acquisition unit that acquires communication data amount information indicating a communication data amount of the communication data, and when each information acquired by the communication information acquisition unit satisfies a predetermined condition, the second wireless communication device And a second radio resource allocation unit that allocates the released radio resource.
- the case where the predetermined condition is satisfied is preferably at least a case where the communication type is a type for executing communication with a constant communication data amount.
- the case where the predetermined condition is satisfied is at least a case where the communication type is a type for executing communication with a constant communication data amount, and the communication data amount of the second wireless communication device is the constant It is preferable that the amount of communication data is less than the above.
- the communication type for executing communication with the constant communication data amount is voice communication.
- the communication classification which performs communication by the said fixed communication data amount is real-time broadcasting.
- radio resources included in a communication frame are allocated to the radio communication apparatus.
- a step of acquiring information a step of detecting a first wireless communication device that is a target for intermittently releasing the wireless resources based on the acquired information on the communication status, and the detected first wireless
- the present invention takes into consideration the communication status of the wireless communication device and assigns a plurality of wireless resources to wireless resources that are relatively in the same position in each communication frame. Since communication devices can be assigned, it is possible to contribute to effective use of radio resources.
- the present invention restricts allocation of radio resources of the radio communication device when there is a radio communication device having a good environment for radio communication among the radio communication devices currently in radio communication, and the radio communication device Since the released wireless resources are allocated to other connected wireless communication devices while maintaining wireless communication with the other devices, the appropriate amount of data according to the application used in the other connected wireless communication devices Can be performed wireless communication.
- FIG. 1 is a functional block diagram showing a schematic configuration of a radio base station apparatus according to the first embodiment of the present invention.
- a radio base station apparatus 100 shown in FIG. 1 performs radio communication with a plurality of radio communication apparatuses by a time division multiple access method.
- the radio base station apparatus 100 includes a control unit 110, a modem unit 112, a network interface 120 for connecting to an external network side, a memory 130 for storing a determination threshold table, and a changeover switch (SW) for switching transmission / reception.
- An RF unit 140 is provided.
- the control unit 110 includes a communication processing unit 111, a call control unit 113, a statistical processing unit (information acquisition unit) 114, and an intermittent arrangement determination unit (detection unit) 115.
- the modem unit 112 modulates a transmission signal to a wireless communication device (not shown) and demodulates a reception signal from the wireless communication device.
- the call control unit 113 performs call control so as to establish a radio link channel with the radio communication device.
- the statistical processing unit 114 acquires information regarding the communication status of the wireless communication based on the wireless signal from the wireless communication device. Based on the information acquired by the statistical processing unit 114, the intermittent placement determination unit 115 detects a wireless communication apparatus that can intermittently allocate time slots for each predetermined number of communication frames.
- the communication processing unit 111 includes a radio resource allocation unit 111A and a modulation scheme control unit 111B.
- the radio resource allocation unit 111A allocates time slots included in each communication frame to a plurality of radio communication devices.
- the radio resource allocating unit 111A transmits a radio signal to the radio communication device to which the time slot is allocated intermittently detected by the intermittent placement determination unit 115, the time allocated to the detected radio communication device The slot is released every predetermined frame.
- the modulation scheme control unit 111B determines to change the modulation scheme in the time slot for performing wireless communication with the wireless communication apparatus to a modulation scheme having a larger number of modulation multi-values than the current (before release) modulation scheme. .
- the modulation scheme control unit 111B decides to change the modulation scheme, it instructs the modulation / demodulation unit 112 to change the modulation scheme.
- the modem unit 112 changes the modulation method in the time slot for performing wireless communication to the wireless communication device to a modulation method having a higher modulation multi-level number than the current modulation method. change.
- the radio base station apparatus 100 can maintain a data rate necessary for radio communication with the radio communication apparatus.
- the radio resource allocating unit 111A receives the communication type (application type, user contract grade (user rank) type, required data rate (full rate, half rate) of the wireless communication device when a channel establishment request is received from the wireless communication device. , Quarter rate), etc.) time slots are intermittently allocated to the wireless communication device.
- FIG. 2 is a sequence diagram for explaining operations of the radio base station apparatus and the radio communication apparatus.
- the radio communication apparatus (mobile station) 300 transmits a signal (channel establishment request) requesting establishment of a radio link channel to the radio base station apparatus 100 (step A11).
- This channel establishment request includes a communication rate requested by the terminal itself and a communication type such as a user rank.
- the user rank is determined according to, for example, a fee paid by the user and the number of years of contract, based on a contract between the user and the communication carrier. Users with a high user rank are provided with higher quality services such as no interruptions in voice.
- the wireless resource allocation unit 111A of the wireless base station device 100 Based on the content of the communication type acquired from the wireless communication device 300, the wireless resource allocation unit 111A of the wireless base station device 100 intermittently sets a time slot at a half rate for a wireless communication device that allows half-rate communication, for example.
- the time slot is intermittently assigned at the quarter rate to the wireless communication device that is assigned and allows quarter rate communication (step S11).
- the radio resource allocation unit 111A allocates time slots at a normal rate (full rate) to radio communication apparatuses (non-corresponding users) that should not allocate time slots intermittently.
- the call control unit 113 of the radio base station apparatus 100 transmits a radio channel (time slot) assignment signal to the radio communication apparatus 300 (step A12).
- the radio base station apparatus 100 and the radio communication apparatus 300 perform transmission / reception of a synchronization burst signal using the assigned channel (time slot) (step A13).
- the statistical processing unit 114 receives information on the communication status of the radio communication, for example, reception power of the reception synchronization burst signal, fading speed, frequency deviation, etc. Obtain information and perform statistical processing.
- the intermittent placement determination unit 115 compares the information acquired by the statistical processing unit 114 with a determination threshold value stored in the memory 130, so that the wireless communication device 300 can intermittently allocate time slots. It is determined whether or not. That is, the intermittent placement determination unit 115 detects a wireless communication device that is a target to which a time slot (wireless resource) is assigned for each predetermined number of communication frames.
- the intermittent placement determination unit 115 determines the user rank of the wireless communication device 300 (step S12). If it is determined in step S12 that the wireless communication device is not capable of intermittently assigning time slots, the wireless base station device 100 continues the normal rate communication. If it is determined in step S12 that the wireless communication device is capable of intermittently assigning time slots, the intermittent placement determination unit 115 further includes a plurality of wireless communication devices in wireless communication with the wireless base station device 100. In step S13, it is determined whether or not there is a wireless communication apparatus that has already been intermittently assigned time slots and is performing communication (step S13). That is, the intermittent arrangement determination unit 115 determines whether or not there is an intermittent arrangement user who performs half rate communication or quarter rate communication.
- the radio resource assignment unit 111A determines that the time slot can be assigned intermittently in step S12. The same time slot is intermittently assigned to the device. That is, radio resource allocating section 111A sequentially allocates time slots at the same position in each communication frame to a plurality of radio communication devices.
- step S13 If it is determined in step S13 that there is a wireless communication apparatus that has already been assigned time slots and is communicating, the radio resource assignment unit 111A assigns time slots intermittently in step S12. Already intermittently assigned time slots are assigned to wireless communication devices that have been determined to be possible. Thereafter, the call control unit 113 instructs the target wireless communication apparatus 300 to switch the channel to a time slot (intermittently arranged time slot) that has been assigned intermittently (step A15). Next, radio base station apparatus 100 and radio communication apparatus 300 perform transmission / reception of synchronous burst signals in intermittently arranged time slots (step A16). Then, radio base station apparatus 100 determines whether or not it is possible to maintain a state where time slots are intermittently arranged.
- the radio base station apparatus 100 and the radio communication apparatus 300 start communication in the intermittently arranged time slots (step A17). .
- the statistical processing unit 114 continues to calculate burst correlations whether or not intermittent arrangement of time slots is possible.
- designation of time slots to be intermittently arranged will be described with reference to FIG.
- the radio resource allocating unit 111A should be used for the radio communication apparatus by designating the number of frames offset from the reference frame including the reference time slot and the time slot number in the frame on the basis of the first time slot of the superframe. Indicates a time slot.
- FIG. 4 is a diagram illustrating a frame configuration when the wireless communication devices 300A and 300B perform wireless communication using intermittently arranged time slots.
- FIG. 4 shows a case of two multiplexes in which two wireless communication apparatuses perform wireless communication using the same time slot every other frame.
- the time slot is newly set.
- the wireless communication devices to be assigned with the same time slot are wireless communication devices having the same user rank and application (communication type). In this way, the radio base station apparatus can simplify control when switching radio communication apparatuses in the same time slot.
- the time slot intermittently arranged every other frame is shown.
- the present invention is not limited to one frame, and is a case where time slots are intermittently arranged every several frames. May be. Two or more wireless communication apparatuses using the same time slot can be used.
- Step A15 when the intermittent placement determination unit 115 determines that the wireless communication apparatus is in a communication state that is favorable in an environment where wireless communication is performed and a high-rate modulation class (modulation method) can be set. It is preferable to notify the radio resource allocation unit 111A of the determination of the intermittent arrangement timing of the time slot of the radio communication apparatus and to notify the modulation scheme control unit 111B to determine the change of the modulation class. . In this way, the wireless communication device can suppress a decrease in wireless communication quality due to a decrease in time slots to be used.
- the intermittent placement determination unit 115 identifies the communication type of the wireless communication device based on the signal from the wireless communication device output from the modulation / demodulation unit 112 when the channel establishment request is received from the wireless communication device, and identifies the identified communication type.
- a specific communication type such as VoIP (Voice over Internet Protocol), which is a fixed rate communication, and real-time communication, and moreover, it is time for a wireless communication device that has determined that a value related to the communication status of wireless communication exceeds a determination threshold
- the time slot when there is a time slot that can be allocated to another radio communication apparatus, the time slot is newly allocated to the radio base station apparatus intermittently. It is possible to assign to a wireless communication apparatus that performs communication in the specified time slot. Further, according to the first embodiment of the present invention, among wireless communication devices currently performing wireless communication, when there is a wireless communication device in which the environment for performing wireless communication is good and a high-rate modulation scheme can be set, After resetting the modulation class of the wireless communication device to a high-rate modulation method, by restricting time slot allocation, an appropriate amount of data according to the application used in other connected wireless communication devices It is possible to perform wireless communication that secures.
- the modulation class of a wireless communication apparatus that performs wireless communication at a fixed rate, such as VoIP or real-time communication, to a high-rate modulation scheme, Also in the wireless communication device, it is possible to perform wireless communication that secures an appropriate amount of data according to the application to be used.
- FIG. 5 is a functional block diagram showing a schematic configuration of a radio base station apparatus according to the second embodiment of the present invention.
- the radio base station apparatus 200 shown in FIG. 5 includes an RF unit 240 including a changeover switch (SW) that switches between transmission and reception, a control unit 210, a modem unit 212, a memory 230 that stores a determination threshold table, an external network side, A network interface 220 is provided.
- the control unit 210 includes a communication processing unit 211, a call control unit 213, a statistical processing unit 214, and an intermittent arrangement determination unit 215.
- the communication processing unit 211 includes a radio communication control unit 301, a radio resource allocation unit 302, an open radio resource allocation unit 303, and a radio resource allocation control unit 304.
- the statistical processing unit 214 includes a communication status information acquisition unit 305 and a communication information acquisition unit 306.
- the intermittent arrangement determination unit 215 includes a wireless communication device detection unit 307 and an adjacent wireless communication device detection unit 308.
- the modem unit 212 modulates a transmission signal to a wireless communication device (not shown) and demodulates a reception signal from the wireless communication device.
- the call control unit 213 performs call control so as to establish a radio link channel with the radio communication apparatus.
- the radio resource allocation unit 302 (first radio resource allocation unit) allocates a time slot included in the communication frame to the radio communication device.
- the wireless communication control unit 301 performs wireless communication with the wireless communication device in the time slot assigned by the wireless resource assignment unit 302.
- the communication status information acquisition unit 305 acquires information regarding the communication status such as received power, fading speed, and frequency deviation for the currently communicating wireless communication device.
- the wireless communication device detection unit 307 (first wireless communication device detection unit) intermittently sets the time slot based on the information acquired by the communication status information acquisition unit 305 and the determination threshold table stored in the memory 230. A first wireless communication device to be opened is detected.
- the radio resource allocation control unit 304 intermittently releases time slots for the first radio communication device detected by the radio communication device detection unit 307 every predetermined number of communication frames. As a result, the radio base station apparatus can allocate the open time slot to the other radio communication apparatuses connected to which the time slot adjacent to the released time slot is allocated.
- the wireless communication control unit 301 transmits a wireless signal to the first wireless communication device detected by the wireless communication device detection unit 307.
- the modulation scheme for performing wireless communication in an unreleased time slot may be determined to be changed to a modulation scheme having a higher modulation multi-level number than the current modulation scheme.
- the wireless communication control unit 301 instructs the modulation / demodulation unit 212 to change the modulation method.
- the modulation / demodulation unit 212 changes the modulation method for performing wireless communication in an unreleased time slot according to the instruction from the wireless communication control unit 301 to a modulation method having a higher modulation multi-level number than the current modulation method. To do.
- the radio base station apparatus maintains the data rate necessary for the radio communication with the first radio communication apparatus, while the other time slot to which the time slot adjacent to the released time slot is allocated is connected.
- An open time slot can be assigned to a wireless communication device.
- the adjacent wireless communication device detection unit 308 detects a second wireless communication device to which a time slot adjacent to the time slot released by the wireless resource allocation control unit 304 is assigned.
- the communication information acquisition unit 306 includes information indicating the type of communication to the second wireless communication device detected by the adjacent wireless communication device detection unit 308, and communication data amount information indicating the communication data amount of the second wireless communication device. To get.
- the open radio resource allocation unit 303 (second radio resource allocation unit) is opened to the second radio communication device when each piece of information acquired by the communication information acquisition unit 306 satisfies a predetermined condition. Assign time slots.
- FIG. 6 is a sequence diagram illustrating operations of the radio base station apparatus and the radio communication apparatus.
- radio base station apparatus 200 and radio communication apparatus (mobile station) 300D are communicating.
- radio communication apparatus (mobile station) 300C transmits a signal requesting establishment of a radio link channel to radio base station apparatus 200 (step B11)
- call control unit 213 of radio base station apparatus 200 receives a radio channel (time slot). Is assigned to the wireless communication device 300C (step B12).
- the radio base station apparatus 200 and the radio communication apparatus 300C perform transmission / reception of a synchronous burst signal using the allocated channel (time slot) (step B13).
- the communication status information acquisition unit 305 of the statistical processing unit 214 receives a value related to the communication status of the radio communication, for example, reception power of the reception synchronization burst signal, Statistical information is processed by acquiring information (communication status information) such as fading speed and frequency deviation.
- the wireless communication device detection unit 307 compares the value acquired by the communication status information acquisition unit 305 with the determination threshold stored in the memory 230, and the wireless communication device 300C determines the high-rate modulation class (modulation method). It is determined whether or not the wireless communication device can be set.
- the wireless communication device detection unit 307 is a wireless communication device in which the environment for performing wireless communication is good and the value related to the communication status of the wireless communication is in a good communication state such that a high-rate modulation class (modulation method) can be set.
- the communication processing unit 211 is notified of the determination of the intermittent arrangement timing of the time slot of the wireless communication device 300C and the modulation class is changed (step T11).
- the radio resource allocation control unit 304 of the communication processing unit 211 determines to release the time slot allocated to the radio communication device 300C every predetermined number of frames.
- the wireless communication control unit 301 transmits a channel switching (intermittent arrangement) instruction signal to the wireless communication device 300C (step B15). Further, the wireless communication control unit 301 decides to change the modulation method for performing wireless communication in an unreleased time slot to a modulation class (modulation method) having a higher modulation multi-level number than the current modulation method. Then, the modulation class instruction signal is transmitted to the wireless communication device 300C and notified to the modem unit 212.
- radio base station apparatus 200 and radio communication apparatus 300C perform transmission and reception of synchronization burst signals in intermittently arranged time slots, and radio base station apparatus 200 maintains communication in intermittently arranged time slots. It is determined whether or not it is possible (step B16). If it is possible to intermittently arrange time slots, radio base station apparatus 200 and radio communication apparatus 300C start communication in the intermittently arranged time slots (step B17).
- the adjacent radio communication device detection unit 308 of the radio base station device 200 detects the radio communication device 300D to which a time slot adjacent to the time slot released by the radio resource allocation control unit 304 is assigned.
- the communication information acquisition unit 306 includes, as communication information, information indicating the type of communication to the wireless communication device 300D detected by the adjacent wireless communication device detection unit 308 and communication data amount information indicating the communication data amount of the wireless communication device 300D. get.
- the open radio resource allocation unit 303 performs wireless communication when each piece of information acquired by the communication information acquisition unit 306 is a communication type that performs communication with a certain amount of communication data, such as voice communication (VoIP) or real-time broadcasting. An open time slot is assigned to the device 300D (step B18).
- the open radio resource allocation unit 303 is a case where each piece of information acquired by the communication information acquisition unit 306 is a communication type for executing communication with a certain amount of communication data, and communication data of the radio communication device 300D.
- an open time slot may be allocated to the wireless communication device 300D.
- the radio base station apparatus 200 and the radio communication apparatus 300D perform radio communication using the time slot used by the radio communication apparatus 300D and the open time slots (intermittently arranged time slots) ( Step B19).
- FIG. 7 is a diagram illustrating a frame configuration when the wireless communication device 300C performs wireless communication using a time slot in which the wireless communication device 300C is intermittently arranged.
- FIG. 7 shows that the wireless communication apparatus 300C performs wireless communication using a time slot every other frame, and there is a time slot that can be assigned every other frame.
- the wireless base station apparatus since the assignable time slots can be created by intermittently arranging the wireless base station apparatus, the wireless base station apparatus has a predetermined interval with respect to the other wireless communication apparatuses in addition to the time slots used by the other wireless communication apparatuses. Each open time slot can be assigned.
- FIG. 8 shows a frame configuration when wireless communication apparatus 300D performs wireless communication using a time slot assigned to wireless communication apparatus 300D and a newly assigned intermittently assigned time slot.
- the wireless communication device 300D can also use the newly opened intermittently arranged time slots, wireless communication can be performed while ensuring an appropriate amount of data according to the application to be used.
- radio base station apparatus Since the time slot allocated to radio communication apparatus 300D and the newly allocated time slot allocated intermittently are adjacent, radio base station apparatus connects two adjacent time slots. Again. When the two time slots are connected, the preamble portion of the transmission / reception signal is reduced by one, so that the wireless communication device 300D can increase the amount of data that can be transmitted / received by the reduction of one.
- the time slot intermittently arranged every other frame is shown. However, the present invention is not limited to one frame, and may be intermittently arranged every several frames. .
- the time of the wireless communication device is By restricting the slot assignment, the open time slot is assigned to another connected wireless communication device while maintaining wireless communication with the wireless communication device. Therefore, it is possible to perform wireless communication that secures an appropriate amount of data according to the application to be used.
- adjacent time slots are concatenated and allocated to other connected wireless communication devices. In the wireless communication apparatus, it is possible to perform wireless communication that secures an appropriate amount of data according to the application to be used.
- a radio base station apparatus that performs radio communication with a plurality of radio communication apparatuses by a time division multiple access method has been described.
- the present invention describes a plurality of radio communication apparatuses. It can also be realized in a radio base station apparatus that performs radio communication with a radio frequency division multiple access method. That is, in the above-described embodiment, time slots are used as radio resources.
- time slots are used as radio resources.
- subcarriers and resource blocks are targeted as radio resources. It is also possible.
- the present invention has been described as an apparatus.
- the present invention can be realized as a communication method, a program, and a storage medium storing the program, which are substantially equivalent to these. It should be understood that these are included in the scope.
- each step of these communication methods and programs uses an arithmetic processing unit such as a CPU or a DSP as needed in the data processing, and the input data, processed / generated data, etc. are stored in the HDD. And stored in a storage device such as a memory.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
そのため、1フレーム内の複数のタイムスロットを利用した無線通信を行うことで、送受信可能なデータ量を増加させる技術が提案されている(特許文献2参照)。
(第1の実施形態)
図1は、本発明の第1の実施態様による無線基地局装置の概略構成を示す機能ブロック図である。図1に示す無線基地局装置100は、複数の無線通信装置との間で時分割多元接続方式により無線通信を実行する。無線基地局装置100は、制御部110と、変復調部112と、外部網側との接続を行う網インターフェース120と、判定閾値テーブルを格納するメモリ130と、送受信を切り替える切り替えスイッチ(SW)を含むRF部140を備える。制御部110は、通信処理部111と、呼制御部113と、統計処理部(情報取得部)114と、間欠配置判定部(検出部)115を備える。
また、本発明の第1の実施態様によれば、現在、無線通信中の無線通信装置のうち、無線通信を行う環境がよく、高レートの変調方式を設定可能な無線通信装置がある場合、当該無線通信装置の変調クラスを高レートの変調方式に再設定した後に、タイムスロットの割り当てを制限することで、接続中の他の無線通信装置において、利用するアプリケーションなどに応じた適切なデータ量を確保した無線通信を行うことが可能となる。
また、本発明の第1の実施態様によれば、VoIPやリアルタイム通信など、固定レートにて無線通信を行っている無線通信装置の変調クラスを高レートの変調方式に再設定することで、当該無線通信装置においても、利用するアプリケーションなどに応じた適切なデータ量を確保した無線通信を行うことが可能となる。
次に、本発明の第2の実施形態について説明する。図5は、本発明の第2の実施態様による無線基地局装置の概略構成を示す機能ブロック図である。図5に示す無線基地局装置200は、送受信を切り替える切り替えスイッチ(SW)を含むRF部240と、制御部210と、変復調部212と、判定閾値テーブルを格納するメモリ230と、外部網側との接続を行う網インターフェース220を備えている。
制御部210は、通信処理部211と、呼制御部213と、統計処理部214と、間欠配置判定部215を備えている。通信処理部211は、無線通信制御部301と、無線リソース割当部302と、開放無線リソース割当部303と、無線リソース割当制御部304を備えている。統計処理部214は、通信状況情報取得部305と、通信情報取得部306を備えている。間欠配置判定部215は、無線通信装置検出部307と、隣接無線通信装置検出部308を備えている。
通信状況情報取得部305は、無線通信を実行している時、現在通信中の無線通信装置について、受信電力、フェージング速度、周波数偏差等の通信状況に関する情報を取得する。無線通信装置検出部307(第1の無線通信装置検出部)は、通信状況情報取得部305で取得された情報とメモリ230に格納される判定閾値テーブルとに基づいて、タイムスロットを間欠的に開放する対象となる第1の無線通信装置を検出する。
無線リソース割当制御部304は、無線通信装置検出部307で検出された第1の無線通信装置に対するタイムスロットを、所定数の通信フレーム毎に間欠的に開放する。これにより、無線基地局装置は、開放されたタイムスロットに隣接するタイムスロットが割り当てられた接続中の他の無線通信装置無線通信装置に対して、開放したタイムスロットを割り当てることができる。
通信情報取得部306は、隣接無線通信装置検出部308で検出された第2の無線通信装置への通信種別を示す情報、および当該第2の無線通信装置の通信データ量を示す通信データ量情報を取得する。
開放無線リソース割当部303(第2の無線リソース割当部)は、通信情報取得部306で取得された各情報が所定条件を満たした場合に、第2の無線通信装置に対して、開放されたタイムスロットを割り当てる。
無線通信装置(移動局)300Cが無線基地局装置200に無線リンクチャネルの確立を要求する信号を送信すると(ステップB11)、無線基地局装置200の呼制御部213は、無線チャネル(タイムスロット)の割り当て信号を無線通信装置300Cに送信する(ステップB12)。次に、割り当てられたチャネル(タイムスロット)で、無線基地局装置200と無線通信装置300Cは、同期バースト信号の送受信を行う(ステップB13)。
また、上述した実施の形態では、1フレームおきに間欠配置されたタイムスロットについて示したが、本発明は、1フレームに限るものではなく、数フレームおきに間欠配置される場合であっても良い。
また、本発明の第2の実施態様によれば、一定の通信レートを確保できない場合に、接続中の他の無線通信装置に、隣接タイムスロットを連結して割り当てるので、接続中の他の当該無線通信装置において、利用するアプリケーションなどに応じた適切なデータ量を確保した無線通信を行うことが可能となる。
Claims (12)
- 複数の無線通信装置との間で無線通信を実行する無線基地局装置において、
無線通信を実行する前記無線通信装置に対して無線リソースを割り当てる無線リソース割当部と、
無線通信中の前記無線通信装置の通信状況に関する情報を取得する情報取得部と、
前記情報取得部が取得した情報に基づいて、所定数の通信フレーム毎に無線リソースを割り当てる対象となる無線通信装置を検出する検出部と、を備え、
前記無線リソース割当部は、前記検出部で検出された複数の前記無線通信装置に対して、同一の無線リソースを所定数の通信フレーム毎に間欠的に割り当てる無線基地局装置。 - 前記無線リソース割当部は、前記無線通信装置からのチャネル確立要求時に、前記無線通信装置の通信種別に基づき、前記無線通信装置に対して所定数の通信フレーム毎に無線リソースを割り当てる請求項1に記載の無線基地局装置。
- 前記無線リソース割当部は、前記通信種別に含まれる通信レートの指定に応じて、前記無線通信装置に前記無線リソースを指定された通信レートで割り当てる請求項2に記載の無線基地局装置。
- 前記無線リソース割当部は、前記通信種別が同じである複数の無線通信装置に対して、同一の無線リソースを割り当てる請求項2に記載の無線基地局装置。
- 前記無線リソース割当部が、無線通信中の前記無線通信装置に無線リソースを所定数の通信フレーム毎に割り当てる場合、割り当てた無線リソースで行われる無線通信の変調方式を、前記無線リソースを割り当てる前の無線通信の変調方式よりも高い通信レートが得られる変調方式に変更する変調方式制御部を更に備える請求項1に記載の無線基地局装置。
- 複数の無線通信装置との間で無線通信を実行する無線基地局装置の無線通信方法において、
無線通信を実行する前記無線通信装置に対して無線リソースを割り当てる無線リソース割当ステップと、
無線通信中の前記無線通信装置の通信状況に関する情報を取得する情報取得ステップと、
前記情報取得ステップで取得された情報に基づいて、所定数の通信フレーム毎に無線リソースを割り当てる無線通信装置を検出する検出ステップと、
前記検出ステップで検出された複数の前記無線通信装置に対して、同一の無線リソースを所定数の通信フレーム毎に間欠的に割り当てるように制御するステップと、
を含む無線通信方法。 - 複数の無線通信装置との間で無線通信を実行する無線基地局装置において、
前記無線通信装置に対して、通信フレームに含まれる無線リソースを割り当てる第1の無線リソース割当部と、
前記第1の無線リソース割当部によって割り当てられた無線リソースで、前記無線通信装置との間で前記無線通信を実行する無線通信制御部と、
前記無線通信制御部で前記無線通信を実行しているとき、現在通信中の前記無線通信装置について、通信状況に関する情報を取得する通信状況情報取得部と、
前記通信状況情報取得部で取得された情報に基づいて、前記無線リソースを間欠的に開放する対象となる第1の無線通信装置を検出する第1の無線通信装置検出部と、
前記第1の無線通信装置検出部で検出された第1の無線通信装置に対する無線リソースを、所定数の通信フレーム毎に間欠的に開放する無線リソース割当制御部と、
前記無線リソース割当制御部で開放された無線リソースに隣接する無線リソースが割り当てられた第2の無線通信装置を検出する第2の無線通信装置検出部と、
前記第2の無線通信装置検出部で検出された第2の無線通信装置への通信種別を示す情報、および当該第2の無線通信装置の通信データ量を示す通信データ量情報を取得する通信情報取得部と、
前記通信情報取得部で取得された前記各情報が所定条件を満たした場合に、前記第2の無線通信装置に対して、前記開放された無線リソースを割り当てる第2の無線リソース割当部と、
を備える無線基地局装置。 - 前記所定条件を満たす場合とは、少なくとも、前記通信種別が一定の通信データ量での通信を実行する種別の場合である請求項7に記載の無線基地局装置。
- 前記所定条件を満たす場合とは、少なくとも、前記通信種別が一定の通信データ量での通信を実行する種別の場合であり、かつ、前記第2の無線通信装置の通信データ量が前記一定の通信データ量よりも少ない場合である請求項7に記載の無線基地局装置。
- 前記一定の通信データ量での通信を実行する通信種別は、音声通信である請求項8に記載の無線基地局装置。
- 前記一定の通信データ量での通信を実行する通信種別は、リアルタイム放送である請求項8に記載の無線基地局装置。
- 複数の無線通信装置との間で無線通信を実行する無線基地局装置の無線通信方法において、
前記無線通信装置に対して、通信フレームに含まれる無線リソースを割り当てるステップと、
割り当てられた無線リソースで、前記無線通信装置との間で前記無線通信を実行するステップと、
前記無線通信を実行しているとき、現在通信中の前記無線通信装置について、通信状況に関する情報を取得するステップと、
取得された通信状況に関する情報に基づいて、前記無線リソースを間欠的に開放する対象となる第1の無線通信装置を検出するステップと、
検出された前記第1の無線通信装置に対する無線リソースを、所定数の通信フレーム毎に間欠的に開放するステップと、
開放された無線リソースに隣接する無線リソースが割り当てられた第2の無線通信装置を検出するステップと、
検出された第2の無線通信装置への通信種別を示す情報、および当該第2の無線通信装置の通信データ量を示す通信データ量情報を取得するステップと、
取得された前記各情報が所定条件を満たした場合に、前記第2の無線通信装置に対して、前記開放された無線リソースを割り当てるステップと、
を含む無線通信方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/059,369 US8442014B2 (en) | 2008-08-27 | 2009-08-27 | Wireless base station apparatus and wireless communication method |
JP2010526760A JP5048840B2 (ja) | 2008-08-27 | 2009-08-27 | 無線基地局装置及び無線通信方法 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-217751 | 2008-08-27 | ||
JP2008217751 | 2008-08-27 | ||
JP2008-219919 | 2008-08-28 | ||
JP2008219919 | 2008-08-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010024335A1 true WO2010024335A1 (ja) | 2010-03-04 |
Family
ID=41721500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/064966 WO2010024335A1 (ja) | 2008-08-27 | 2009-08-27 | 無線基地局装置及び無線通信方法 |
Country Status (3)
Country | Link |
---|---|
US (1) | US8442014B2 (ja) |
JP (1) | JP5048840B2 (ja) |
WO (1) | WO2010024335A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016165136A (ja) * | 2016-04-21 | 2016-09-08 | 住友電気工業株式会社 | 通信システム、送信方法、路側通信機、及びコンピュータプログラム |
WO2017195656A1 (ja) * | 2016-05-12 | 2017-11-16 | シャープ株式会社 | 送信装置、受信装置および通信方法 |
JP2020005293A (ja) * | 2018-01-31 | 2020-01-09 | 住友電気工業株式会社 | 通信システム、及び送信期間の割当方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9392598B2 (en) * | 2012-03-09 | 2016-07-12 | Qualcomm Incorporated | Method and system for communicating between small cells using over-the-air transmissions |
US20150071089A1 (en) * | 2013-09-06 | 2015-03-12 | Qualcomm Incorporated | Devices and methods for decreasing awake state durations in access terminals operating in a slotted idle mode |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006173662A (ja) * | 2004-12-10 | 2006-06-29 | Sanyo Electric Co Ltd | タイムスロット割当方法およびそれを利用した基地局装置 |
JP2007096985A (ja) * | 2005-09-29 | 2007-04-12 | Kyocera Corp | 基地局装置及び通信開始方法 |
JP2007235985A (ja) * | 2007-04-12 | 2007-09-13 | Fujitsu Ltd | 無線送信装置、無線受信装置及びその送/受信方法 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05336061A (ja) | 1992-05-29 | 1993-12-17 | Fujitsu Ltd | 移動無線システム |
JPH09172674A (ja) | 1995-12-20 | 1997-06-30 | Matsushita Electric Ind Co Ltd | 無線通信システム |
US6112088A (en) * | 1996-08-30 | 2000-08-29 | Telefonaktiebolaget, L.M. Ericsson | Radio communications system and method for mobile assisted handover between a private network and a public mobile network |
US6999430B2 (en) * | 2000-11-30 | 2006-02-14 | Qualcomm Incorporated | Method and apparatus for transmitting data traffic on a wireless communication channel |
JP2006049954A (ja) * | 2004-07-30 | 2006-02-16 | Kyocera Corp | 基地局装置および通信制御方法 |
EP2342878B1 (en) * | 2008-08-20 | 2013-06-19 | QUALCOMM Incorporated | A method and apparatus for sharing signals on a single channel |
-
2009
- 2009-08-27 WO PCT/JP2009/064966 patent/WO2010024335A1/ja active Application Filing
- 2009-08-27 US US13/059,369 patent/US8442014B2/en not_active Expired - Fee Related
- 2009-08-27 JP JP2010526760A patent/JP5048840B2/ja not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006173662A (ja) * | 2004-12-10 | 2006-06-29 | Sanyo Electric Co Ltd | タイムスロット割当方法およびそれを利用した基地局装置 |
JP2007096985A (ja) * | 2005-09-29 | 2007-04-12 | Kyocera Corp | 基地局装置及び通信開始方法 |
JP2007235985A (ja) * | 2007-04-12 | 2007-09-13 | Fujitsu Ltd | 無線送信装置、無線受信装置及びその送/受信方法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016165136A (ja) * | 2016-04-21 | 2016-09-08 | 住友電気工業株式会社 | 通信システム、送信方法、路側通信機、及びコンピュータプログラム |
WO2017195656A1 (ja) * | 2016-05-12 | 2017-11-16 | シャープ株式会社 | 送信装置、受信装置および通信方法 |
JP2020005293A (ja) * | 2018-01-31 | 2020-01-09 | 住友電気工業株式会社 | 通信システム、及び送信期間の割当方法 |
Also Published As
Publication number | Publication date |
---|---|
US8442014B2 (en) | 2013-05-14 |
JP5048840B2 (ja) | 2012-10-17 |
JPWO2010024335A1 (ja) | 2012-01-26 |
US20110149923A1 (en) | 2011-06-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8005046B2 (en) | System and method for dynamic frequency allocation for packet switched services | |
RU2714104C2 (ru) | Системы и способы одновременного использования диапазона частот в активно используемом диапазоне частот | |
RU2348119C2 (ru) | Планировщик с учетом пакетов в системах беспроводной связи | |
US8699507B2 (en) | Scheduling of data transmissions in multi-carrier data transmission networks | |
JP4875172B2 (ja) | VoIP接続を提供する方法 | |
JP7264230B2 (ja) | 通信システム | |
KR20080026185A (ko) | 스케쥴링 정보를 효율적으로 제공하는 방법 및 장치 | |
US8948136B2 (en) | Resource allocation in a communication system | |
KR101461371B1 (ko) | 무선 액세스 네트워크에서 업링크 자원 할당을 요청 및 처리하기 위한 방법 및 장치 | |
JP2008533805A (ja) | 無線通信システムにおける拡張リアルタイムポーリングサービスの上りリンク資源割り当て要請方法 | |
KR20090042334A (ko) | 업링크에서 harq 프로세스를 동적으로 할당하기 위한 방법 및 장치 | |
JP2000511750A (ja) | ワイヤレス通信システムにおいてスペクトル資源を配分するための方法および装置 | |
KR101774096B1 (ko) | 업링크 VoIP의 커버리지 향상을 위한 방법 및 시스템 | |
JP6482689B2 (ja) | 音声データのダイナミック・ディレイ・スケジューリング方法及び基地局 | |
JP5048840B2 (ja) | 無線基地局装置及び無線通信方法 | |
JP5514192B2 (ja) | ネットワークにおいて通信するための方法及びそのための無線局 | |
CN109151832B (zh) | 免授权资源访问方法、调度方法及装置、存储介质、终端、基站 | |
EP2587865B1 (en) | Overhead reduction in a communications system | |
WO2019000873A1 (zh) | 一种调制编码方式的调整方法及基站 | |
CN107211400B (zh) | 网络准入控制方法、接入点及接入控制器 | |
KR20070018665A (ko) | 무선 통신 시스템에서 가상 회선 교환 방식을 이용한 통신자원 할당 방법과 장치 및 단말의 데이터 송수신 방법 | |
WO2020089219A1 (en) | Telecommunications apparatus and methods | |
JP2009303125A (ja) | チャネル挿入方法、送信機および受信機 | |
JP5089431B2 (ja) | 無線基地局装置 | |
JP2013121080A (ja) | 無線通信システムおよび基地局 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 09809985 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2010526760 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 13059369 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 09809985 Country of ref document: EP Kind code of ref document: A1 |