WO2006059673A1 - 無線ネットワーク制御装置、無線ネットワーク制御方法および通信システム - Google Patents
無線ネットワーク制御装置、無線ネットワーク制御方法および通信システム Download PDFInfo
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- WO2006059673A1 WO2006059673A1 PCT/JP2005/022070 JP2005022070W WO2006059673A1 WO 2006059673 A1 WO2006059673 A1 WO 2006059673A1 JP 2005022070 W JP2005022070 W JP 2005022070W WO 2006059673 A1 WO2006059673 A1 WO 2006059673A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Definitions
- Wireless network control device Wireless network control method, and communication system
- the present invention relates to a radio network control device, a radio network control method, and a communication system.
- Wireless resources are resources that can be accommodated in a wireless section between a wireless base station and a terminal.
- Examples of radio resources include codes used for modulation, transmission power, and interference.
- the amount of radio resources required when a call is accommodated in a radio base station varies depending on the distance from the radio base station to the terminal, and the amount of radio resources required for calls of the same channel type is not constant.
- the baseband resource is the baseband of the radio base station This is the processing capability provided in the signal processing unit, which is used by the hardware to perform call spreading and modulation processing. Baseband resources necessary for accommodating calls in radio base stations are determined for each call type.
- FIG. 28 is a block diagram illustrating the configuration of a conventional communication system disclosed in Japanese Patent Laid-Open No. 2003-87854 and the document “W-CDMA mobile communication system”.
- the conventional communication system has a radio network controller 2301 and a radio base station 2307 connected to the core network 2302, and these radio network controller 2301 and the radio base station 2307 are wired. Connected with.
- the core network 2302 is a large-capacity backbone communication line owned by a telecommunications carrier.
- Radio network control device 2301 performs BTS control, outgoing / incoming connection control, call termination control, diversity handover control, and the like.
- Core network side wired communication means 2303 and BTS side wired communication means 2304 And radio resource management means 2305 and control means 2306.
- the core network side wired communication means 2303 transmits and receives signals to and from the core network 2302.
- the BTS-side wired communication means 2304 transmits and receives signals to and from the radio base station 2307.
- the radio resource management means 2305 manages the usage status of radio resources.
- the control unit 2306 controls all processes performed by the wireless network control device 2301.
- the wireless base station 2307 performs wireless communication with the terminal 2308, and converts a wireless signal into a wired signal for a wired network.
- the radio base station 2307 efficiently uses the frequency by disassembling the covered area for each frequency and by performing sectorization (small area).
- the radio base station 2307 includes a wired communication unit 2309, a radio communication unit 2310, a baseband signal processing unit 2311, and a baseband resource control unit 2314.
- the wireless communication means 2310 includes an antenna, an amplifier, a power supply, and a control program.
- the wireless communication means 2310 corresponds to the sector, and the number of installations differs depending on the number of sectors.
- the baseband signal processing unit 2311 performs signal processing such as code modulation processing of a radio signal from the terminal 2308, conversion to a wired signal, and the like, and is a substrate on which a circuit including a plurality of ICs is mounted. Realized as a shelf with multiple (cards) connected.
- the baseband signal processing unit 2311 can process a call of one or a plurality of frequencies.
- the baseband signal processing unit 2311 is divided into first baseband signal processing means 2312 and second baseband signal processing means 2313 in order to improve the processing speed of spreading and modulation processing and to distribute the processing load.
- the first baseband signal processing means 2312 and the second baseband signal processing means 2313 are referred to as shelf 1 and shelf 2, respectively.
- the baseband signal processing unit 2311 Since the processing performed by the baseband signal processing unit 2311 is performed for each frequency, if a larger number of frequencies are controlled by the individual first baseband signal processing means 2312 and second baseband signal processing means 2313, the processing load increases. The Accordingly, the baseband signal processing unit 2311 is limited in the number of frequencies that can be controlled in terms of cost and processing load.
- the baseband resource control unit 2314 manages the amount of free resources in the baseband signal processing unit 2311 and performs a process of assigning a call to a predetermined shelf in the baseband signal processing unit 2311. This call allocation is to place the call on a predetermined shelf when the call occurs.
- the free resource amount refers to the remaining processing capability.
- an initial registration request 1601 message is transmitted from the radio base station 2307 to the radio network controller 2301 to register the radio base station 2307. Do. In 3GPP TS (Technical Specifications) 25. 433 Ver6.0.0, this message is called an AUDIT REQUIRED.
- the radio network controller 2301 Upon receiving the initial registration request 1601 message, the radio network controller 2301 transmits an initialization processing request 1602 message to the radio base station 2307. Receiving this, the radio base station 2307 transmits an initialization process response 1603 message to the radio network controller 2301. For example, as shown in FIG. 21B, this message includes local message information including a message type (Message Type) indicating that the message to be transmitted is an initialization processing response and the identifier of the cell covered by the wireless base station 2307. (Local Cell Information). Wireless base station 2307 and wireless network controller 2301 After sending and receiving these messages, the initialization process is terminated. This initialization process response 1603 message is referred to as an audit response in 3GPP TS 25.433 Ver6.0.0.
- Message Type message type
- Wireless base station 2307 and wireless network controller 2301 After sending and receiving these messages, the initialization process is terminated.
- This initialization process response 1603 message is referred to as an audit response in 3GPP TS 25.433 Ver6.0.0.
- the message of the call assignment request 1604 is also transmitted to the radio network controller 2301 by the core network side power.
- the radio network controller 2301 performs processing for assigning a call to a radio resource.
- radio network controller 2301 transmits an allocation request 1605 (3GPP TS 25.433 Ver6.0.0 RADIO LINK SETUP REQUEST) message so as to allocate a call to radio base station 2307.
- the message to be sent includes a message type (Message Type) indicating that the message to be sent is an allocation request as shown in FIG. 21C, and a processing procedure between the radio base station 2307 and the radio network controller 2301 for each message. It includes a transaction ID (Transaction ID) etc. that is an identifier indicating.
- the radio base station 2307 performs a process of assigning the call to the shelf.
- the radio base station 2307 Upon completion of the call allocation process, the radio base station 2307 receives an allocation response 1606 (3GPP
- a RADIO LINK SETUP RESPONSE message is sent.
- the message to be transmitted includes a message type (Message Type) indicating that the message to be transmitted is an allocation response and a scrambling code indicating a scrambling code for identifying the terminal, as shown in FIG. 21D. .
- the radio network control device 2301 calculates the radio use resource amount for each frequency based on parameters such as transmission speed and transmission power.
- the amount of radio resources used is expressed as processing capacity (kbps).
- Radio network control device 2301 calculates the amount of radio resources required for each call, and allocates the call to a frequency having a free resource amount corresponding to the required radio resource amount.
- the radio network controller 2301 makes a call assignment request to the radio base station 2307, and the radio base station 2307 assigns the call to the optimum baseband signal processing means.
- the transmission power needs to be increased for terminals with a distant radio base station, and the amount of radio resources is also required for terminals with a distant radio base station. For this reason, the amount of radio resources used and the amount of baseband resources used may differ depending on the call.
- FIG. 22 shows an area 1709 covered by the radio base station 2307 and terminals 1705 to 1708 existing in the area 1709.
- distances 1701 to 1704 from radio base station 2307 to terminals 1705 to 1708 satisfy the following relationship.
- distance 1701 distance 1702 ⁇ distance 1703 ⁇ distance 1704
- FIG. 23 is a diagram showing packet call information at this time.
- Fig. 23 This is a packet call to terminal 1705 and terminal 1706, both of which are fl and frequency, and wireless use resources. The amount is 128 kbps, and the base node resource is 384 kbps.
- the first line represents the amount of resources of 128 kbps for both radio resources and baseband resources.
- the baseband usage resource amount of 384kbps for packet call 1801 can be allocated to shelf 1 Is possible. Note that the amount of baseband usage resources required when a call is accommodated in a radio base station is determined for each call type.
- the packet call 1801 can be assigned.
- the usage status of radio resources and baseband resources after allocation of packet call 1801 is shown in FIGS. 25A and 25B.
- FIGS. 26A and 26B are diagrams showing the usage status of radio resources and baseband resources after the packet call 1802 is allocated.
- the frequency of the packet call 1804 is f3
- the amount of resources used is f3
- base node usage resource amount is 128kbps.
- the amount of free resources 2101a for the wireless call resource amount 384kbps of packet call 1803 is
- FIGS. 27A and 27B are diagrams showing the usage status of radio resources and baseband resources after allocation of the knot call 1803.
- the frequency of the packet call 1804 is f3
- the amount of radio resource used is 256 kbps
- the base node resource used is 384 kbps.
- the radio free resource amount 2201a of the frequency f3 is only 128 kbps.
- the radio network controller 2301 cannot allocate the packet call 1804 because the radio free resource amount 22 Ola of the frequency f 3 is insufficient. Also, since the frequency f4 already uses all resources, the radio network controller 2301 cannot switch the frequency of packet call allocation from f3 to f4.
- the radio free resource amount 2201b of frequency fl is 384kbps, it is possible to allocate the radio use resource amount 256kbps of the packet call 1804.
- the free resource amount 2201c of the shelf 1 that accommodates the frequency fl as the baseband resource is only 128 kbps, the baseband use resource amount 384 kbps of the packet call 1804 cannot be allocated. Even if the frequency is switched to fl, the packet call 1804 is lost.
- the present invention provides a radio network control device, a radio network control method, and a communication system capable of reducing the probability of call loss due to lack of available radio or baseband resources. It is.
- the radio network control apparatus of the present invention includes radio resource management means for managing the use status of radio resources, which are resources that can be accommodated in a radio section between a radio base station and a terminal, and baseband signals of the radio base station. Based on the shelf information management means for managing the usage status of a plurality of shelves forming the resources of the processing means and the usage status of the resources of the radio resources and the resources of the baseband processing means, the radio base station Control means for selecting the frequency of the call to be used and determining the allocation of shelves to the baseband signal processing means.
- the baseband resource is not sufficient even though the radio resource has sufficient vacancy, or the base Although there is sufficient free space in the band resource, there is not enough free space in the radio resource, so the probability of call loss can be reduced.
- the control means of the radio network control apparatus of the present invention transmits a message requesting the radio base station to assign a call to the designated baseband signal processing means.
- the allocation request message can be notified to the baseband signal processing means of the radio base station designated by the radio network controller.
- the resource usage status of the baseband signal processing means of the radio base station managed by the radio network control apparatus of the present invention includes the number of baseband signal processing means of the radio base station and the number of baseband signal processing means for each baseband signal processing means. This information includes the number of controllable frequencies and the maximum resource amount for each baseband signal processing means.
- the resource usage status of the baseband signal processing means of the radio base station managed by the radio network control apparatus of the present invention is the frequency set for each baseband signal processing means of the radio base station, the baseband This information includes the remaining processing capacity for each signal processing means.
- the communication system of the present invention includes a wireless network control device according to the present invention, and a wireless base station that is connected to the wireless network control device by wire and forms a baseband resource by a plurality of shelves. Yes.
- the radio network control method of the present invention controls a frequency used by a radio base station for communication with a terminal and allocation of baseband resources of the radio base station for a call.
- Calculating a radio use resource amount which is a resource that can be accommodated in a radio section between a radio base station and a terminal, to be used at a frequency allocated to the call when the call is generated;
- a step of calculating a baseband use resource amount to be used at a frequency allocated to the wireless network device a step of obtaining a radio free resource amount for each frequency by subtracting a current radio free resource amount, a radio use resource amount, Obtaining the baseband free resource amount for each shelf forming the baseband resource of the connected radio base station by subtracting the current baseband free resource amount baseband used resource amount, and the calculated frequency for each frequency
- the step of setting the priority according to the amount of free wireless resources and the calculated baseband free space for each shelf The product of the step of setting the priority according to the amount of source and the priority set according to the amount of free radio
- the radio network control method of the present invention controls the frequency used by a radio base station for communication with a terminal and the allocation of baseband resources of the radio base station for a call.
- a step of calculating a radio use resource amount which is a resource that can be accommodated in a radio section between a radio base station and a terminal, to be used at a frequency assigned to the call, and to be assigned to the call.
- the radio resource when a call is assigned to a radio resource, the radio resource has sufficient free space. Even though there is not enough free baseband resources, or there is enough free baseband resources, there is not enough free radio resources.
- the present invention can reduce the probability of call loss compared to the prior art by allocating calls while maintaining a balance between the amount of free radio resources and the amount of free baseband resources. it can.
- the radio network control device, radio network control method and communication system according to the present invention can improve call accommodation (allocation) efficiency, and baseband signal processing with less radio base stations. Calls can be accommodated with some hardware resources, reducing costs.
- FIG. 1 is a block diagram of a radio network controller and a radio base station according to Embodiment 1 of the present invention.
- FIG. 2A is a diagram for explaining a sequence indicating control between the radio network controller and radio base station according to Embodiment 1 of the present invention.
- FIG. 2B is a diagram illustrating a message type indicating control between the radio network controller and radio base station according to Embodiment 1 of the present invention.
- FIG. 2C is a diagram for explaining a message type indicating control between the radio network controller and radio base station according to Embodiment 1 of the present invention.
- FIG. 2D is a diagram for explaining a message type indicating control between the radio network controller and radio base station according to Embodiment 1 of the present invention.
- FIG. 3 is a flowchart showing a processing procedure of the radio network controller according to Embodiment 1 of the present invention.
- FIG. 4 is a flowchart showing a processing procedure of the radio network controller according to Embodiment 1 of the present invention.
- FIG. 5 is a diagram for explaining the area of a radio base station and the positional relationship between the radio base station and a terminal.
- FIG. 6 shows each packet call of the radio network controller according to Embodiment 1 of the present invention. It is a figure which shows the information of.
- FIG. 7A is a diagram showing a radio use resource amount for each frequency of the radio network controller according to Embodiment 1 of the present invention.
- FIG. 7B is a diagram showing a baseband usage resource amount for each shelf managed by the radio network controller according to Embodiment 1 of the present invention.
- FIG. 8A is a diagram for explaining priorities for respective frequencies of the radio network control apparatus according to Embodiment 1 of the present invention.
- FIG. 8B is a diagram for explaining the priority for each shelf of the radio network controller according to Embodiment 1 of the present invention.
- FIG. 8C is a diagram for explaining the relationship between the priority for each frequency and the priority for each shelf in the radio network control apparatus according to Embodiment 1 of the present invention.
- FIG. 9A is a diagram showing a radio usage resource amount for each frequency of the radio network control device according to Embodiment 1 of the present invention.
- FIG. 9B is a diagram showing a baseband use resource amount for each shelf managed by the radio network controller according to Embodiment 1 of the present invention.
- FIG. 10A is a diagram for explaining priority for each frequency of the radio network controller according to Embodiment 1 of the present invention.
- FIG. 10B is a diagram for explaining the priority for each shelf of the radio network controller according to Embodiment 1 of the present invention.
- FIG. 10C is a diagram for explaining the relationship between the priority for each frequency and the priority for each shelf in the radio network controller according to Embodiment 1 of the present invention.
- FIG. 11A is a diagram showing a radio usage resource amount for each frequency of the radio network controller according to Embodiment 1 of the present invention.
- FIG. 11B is a diagram showing a baseband use resource amount for each shelf managed by the radio network controller according to Embodiment 1 of the present invention.
- FIG. 12A is a diagram for explaining priorities for respective frequencies of the radio network controller according to Embodiment 1 of the present invention.
- FIG. 12B is a diagram for each shelf of the radio network controller according to Embodiment 1 of the present invention. It is a figure explaining a priority.
- FIG. 12C is a diagram for explaining the relationship between the priority for each frequency and the priority for each shelf of the radio network controller according to Embodiment 1 of the present invention.
- FIG. 13A is a diagram showing a radio use resource amount for each frequency of the radio network controller according to Embodiment 1 of the present invention.
- FIG. 13B is a diagram showing a baseband use resource amount for each shelf managed by the radio network controller according to Embodiment 1 of the present invention.
- FIG. 14A is a diagram for explaining priority for each frequency of the radio network controller according to Embodiment 1 of the present invention.
- FIG. 14B is a diagram for explaining the priority for each shelf of the radio network controller according to Embodiment 1 of the present invention.
- FIG. 14C is a diagram for explaining the relationship between the priority for each frequency and the priority for each shelf in the radio network controller according to Embodiment 1 of the present invention.
- FIG. 15A is a diagram showing a radio usage resource amount for each frequency of the radio network controller according to Embodiment 1 of the present invention.
- FIG. 15B is a diagram showing a baseband use resource amount for each shelf managed by the radio network controller according to Embodiment 1 of the present invention.
- FIG. 16 is a flowchart showing a processing procedure of the radio network controller according to Embodiment 2 of the present invention.
- FIG. 17A is a diagram for explaining priority for each frequency of the radio network controller according to Embodiment 2 of the present invention.
- FIG. 17B is a diagram for explaining the priority for each shelf of the radio network controller according to Embodiment 2 of the present invention.
- FIG. 17C is a diagram for explaining the relationship between the priority for each frequency and the priority for each shelf in the radio network controller according to Embodiment 2 of the present invention.
- FIG. 18A is a diagram for explaining priority for each frequency of the radio network controller according to Embodiment 2 of the present invention.
- FIG. 18B is a diagram for each shelf of the wireless network control device according to Embodiment 2 of the present invention. It is a figure explaining a priority.
- FIG. 18C is a diagram for explaining the relationship between the priority for each frequency and the priority for each shelf of the radio network controller according to Embodiment 2 of the present invention.
- FIG. 19A is a diagram for explaining priority for each frequency of the radio network controller according to Embodiment 2 of the present invention.
- FIG. 19B is a diagram for explaining the priority for each shelf of the radio network controller according to Embodiment 2 of the present invention.
- FIG. 19C is a diagram for explaining the relationship between the priority for each frequency and the priority for each shelf in the radio network controller according to Embodiment 2 of the present invention.
- FIG. 20A is a diagram for explaining priority for each frequency of the radio network controller according to Embodiment 2 of the present invention.
- FIG. 20B is a diagram for explaining the priority for each shelf of the radio network controller according to Embodiment 2 of the present invention.
- FIG. 20C is a diagram for explaining the relationship between the priority for each frequency and the priority for each shelf in the radio network controller according to Embodiment 2 of the present invention.
- FIG. 21A is a diagram for explaining a sequence showing control between a conventional radio network control apparatus and a radio base station.
- FIG. 21B is a diagram for explaining a message type between a conventional radio network controller and a radio base station.
- FIG. 21C is a diagram for explaining a message type between a conventional radio network controller and a radio base station.
- FIG. 21D is a diagram for explaining a message type between a conventional radio network controller and a radio base station.
- FIG. 22 is a diagram for explaining the area of a conventional radio base station and the positional relationship between the radio base station and the terminal.
- FIG. 23 is a diagram showing information for each packet call in the conventional radio network controller.
- FIG. 24A is a diagram illustrating wireless use for each frequency in a conventional wireless network control device. It is a figure which shows resource amount.
- FIG. 24B is a diagram showing a baseband use resource amount for each shelf managed by a conventional wireless network control device.
- FIG. 25A is a diagram showing a radio use resource amount for each frequency in the conventional radio network control apparatus.
- FIG. 25B is a diagram showing a baseband use resource amount for each shelf managed by a conventional wireless network control device.
- FIG. 26A is a diagram showing a radio use resource amount for each frequency in the conventional radio network control apparatus.
- FIG. 26B is a diagram showing a baseband use resource amount for each shelf managed by the conventional wireless network control device.
- FIG. 27A is a diagram showing a radio use resource amount for each frequency in the conventional radio network control apparatus.
- FIG. 27B is a diagram showing a baseband use resource amount for each shelf managed by the conventional wireless network control device.
- FIG. 28 is a block diagram of a conventional radio network controller and radio base station. Explanation of symbols
- Wireless communication means 111 Baseband signal processor
- Second baseband signal processing means (shelf 2)
- a method is shown in which the amount of free radio resources and baseband resources is balanced, that is, the allocation is performed so that as much as possible both free radio resources and free baseband resources remain. .
- the rank of the amount of free radio resources for each frequency of the carrier wave is calculated, and the rank of free of the spanned resources on the shelf of the radio base station is obtained.
- Calls are assigned to carrier wave frequencies and radio base station shelves that have a specific relationship, that is, in the first embodiment, the frequency of a carrier wave and the radio base station shelves with a small product of both.
- FIG. 1 shows a block diagram of a communication system according to an embodiment of the present invention.
- This communication system is different from the conventional communication system shown in FIG. 28 in that the wireless network control device 100 includes shelf information management means 101.
- This shelf information management means 101 manages the shelves forming the baseband resources of the radio base station 107. Accordingly, the control means 106 performs processing related to the allocation of the baseband resources of the radio base station 107 in addition to the allocation of radio resources.
- initialization processes 201 to 203 performed by radio network control apparatus 100 and radio base station 107 are the same as those shown in FIG. 21A, but the data configuration of each message is different. That is, as shown in FIG. 2B, the message of the initialization process response 203 includes a message type (Message Type) indicating that the message to be transmitted is an initialization process response, and a cell that is an area covered by the radio base station 107.
- Message Type message type
- Local cell information including local identifiers and shelf information management for referencing the amount of free resources for each shelf of the radio base station 107 when the radio network controller 100 assigns a call to a radio resource.
- the information managed by means 101 includes the number of shelves, the maximum processing capacity per shelves (the number of call channels that shelves can handle) and the number of frequency types that can be controlled per shelves. .
- the radio network controller 10 from the core network 102 side.
- the allocation request 204 message is transmitted to 0.
- the wireless network control device 100 performs processing for assigning a call to a wireless resource
- the allocation of the shelves forming the baseband resources of the radio base station 107 is also determined.
- the algorithm for allocating calls to radio resources and the algorithm for determining shelf allocation will be described later.
- radio network control apparatus 100 transmits an allocation request 205 message to radio base station 107 so as to allocate a call to the designated shelf allocation position.
- a message type indicating that the message to be transmitted is an allocation request
- a processing procedure between the radio base station 107 and the radio network controller 100 for each message.
- a transaction ID (Transaction ID) that is an identifier indicating a shelf number determined when the wireless network control device 100 assigns a call to a wireless resource.
- the radio base station 107 assigns the call to the shelf with that number.
- the message of the allocation request 205 is called a radio link setup request (RADIO LINK SETUP REQ UEST) in 3GPP TS 25.4 33 Ver6.0.
- the radio base station 107 that has finished the call allocation process transmits an allocation response 206 message.
- the message to be sent includes the message to be sent as shown in Fig. 2D.
- the wireless network controller 100 which manages the message type (Message Type) indicating that it is an allocation response, the scrambling code (Scrambling Code) for identifying the terminal, and the shelf information, allocates the call to the radio resource.
- the information includes the frequency currently controlled for each shelf and the remaining processing capacity for each shelf, which is information for referring to the free resource amount for each shelf of the radio base station 107.
- the assignment response 206 message is called a radio link setup response (RADIO LINK SETUP RESPONSE) in 3GPPTS 25.433 Ver6.0.
- the message included in the allocation request and allocation response is a wireless link setup request (defined in 3GPP TS 25.433 Ver6.0.0.0) ( RADIO LINK ADDITION SETUP REQUEST) or radio link setup response (RADIO LINK ADDITION SETUP RESPO NSE) may be used as allocation request and allocation response messages.
- radio network control apparatus 100 assigns a call to a radio base station from when the radio base station is activated.
- control means 106 calculates the amount of radio resources used at the frequency assigned to the call.
- the amount of radio resources used may be calculated using a known algorithm described in JP-T-2003-524335, or may be calculated using another known algorithm. Note that the amount of resources used refers to the processing capacity required for a call.
- control means 106 calculates the baseband usage resource amount at the frequency assigned to the call (step S302). Note that the amount of baseband resources used is determined by the call type as described in the prior art.
- the control means 106 subtracts the used resource amount calculated in step S301 and step S302, and combines the shelf and the frequency with the best balance between the baseband free resource amount and the wireless free resource amount. Is selected (step S303).
- the best balance is V
- the combination of shelf and frequency is the amount of free baseband resources and free wireless resources. This is the combination of the shelf and frequency that both have the largest amount.
- ranking is performed in descending order of the amount of free resources on the shelf, and a combination that minimizes the product of the respective ranks when ranking in order of increasing amount of free radio resources for each frequency is selected.
- FIG. 4 is a detailed flowchart of step S303.
- the wireless resource management means 105 calculates the amount of available wireless resources for each frequency that can be selected (step S401).
- the shelf information management unit 101 calculates the baseband free resource amount for each shelf forming the baseband signal processing unit 111 (step S402).
- control means 106 obtains the rank order of the amount of free radio resources and sets the priority (step S403).
- control means 106 obtains the rank order of the amount of free baseband resources and sets the priority (step S404).
- control means 106 has the smallest number of multiplications of the shelf priority and the frequency priority set as the combination of the frequency and shelf with the best balance. A combination with the frequency is selected (step S405).
- the control means 106 compares the frequency assigned to the call with the frequency selected in step S303 (step S304).
- step S304 if the frequency assigned to the call is different from the frequency obtained in step S303 (step S304, YES), the frequency assigned to the call is switched (step S305), and the radio base station 107 is selected. Send a request message to the assigned shelf.
- control means 106 is selected by radio base station 107 that does not switch the call frequency. A message for requesting assignment to the shelf is transmitted (step S306).
- radio network control apparatus 100 assigns a frequency to a call and assigns it to a shelf of baseband signal processing section 111 will be described as a specific example.
- Radio base station 107 and terminals 1705 to 1708 are located in the state shown in FIG. 5 as in the conventional example, and the radio resources between radio base station 107 and terminals and the baseband of radio base station 107 are The resource usage is assumed to be in the situation shown in Figs. 7A and 7B as in the conventional example. Then, packet calls to the terminals 1705 to 1708 occur as in the conventional example. Fig. 6 shows the information of the packet call that occurred.
- the amount of radio resources used for a call is calculated (step S301).
- the amount of radio resources used is 128kbps as shown in Fig. 6.
- the amount of radio resources used may be calculated using the algorithm of JP 2003-524335 A, or may be calculated using other existing algorithms.
- the baseband usage resource amount of the call is calculated (step S302).
- the amount of the same resource used is 384 kbps, as shown in Fig. 6.
- control means 106 selects a combination of a shelf and a frequency that gives the best knowledge of the baseband free resource amount and the wireless free resource amount after subtracting the used resources (step S303).
- FIG. 4 shows step S303 in detail.
- step S401 the amount of available radio resources for each frequency is calculated.
- the amount of radio resources available for each frequency is 640k 1) 5 (701 &), frequency £ 2 [1st 1 [ma 01 ⁇ 1) 5, frequency 3 f3] It is 512kbps (701b), and the frequency f4 is Okbps.
- the shelf information management means 101 calculates the amount of free baseband resources for each shelf (step S402). As shown in Fig. 7 (b), the amount of free resources in the base node is 896kbps (7 Olc), and shelf 2 is also 896kbps (701d).
- step S403 the order of magnitude of the amount of wireless free resources is obtained and set as a priority.
- priority 1 is set when the amount of free resources is large
- priority 3 is set when the amount of free resources is small.
- Figure 8A shows the state after setting the priority of the amount of free radio resources for each frequency.
- step S404 the rank order of the amount of free baseband resources is obtained and set as a priority (step S404).
- FIG. 8B shows the state after the priority is set as in step S403.
- step S405 the shelf and frequency with the smallest number obtained by multiplying the shelf priority and the frequency priority Is selected.
- the result of multiplying the shelf priority set in steps S403 and S404 by the frequency priority is shown in FIG. 8C. Since there is a limit to the number of frequencies that can be accommodated on each shelf, combinations that cannot be assigned are marked with an X. From Fig. 8C, select the combination of shelf 1 and frequency fl as the combination of shelf and frequency with the best lance.
- step S304 when the frequency assigned to the call in step S304 in FIG. 3 is compared with the frequency obtained in step S405, the frequency of call 1801 is fl and the frequency obtained in step S405 is also fl ( In step S304, NO), a message requesting allocation to shelf 1 is transmitted to the radio base station 107 (step S306).
- step S404 the state of the free baseband resource amount for each shelf set in step S404 is as shown in FIG. 10B. Furthermore, the result of multiplying the frequency priority set in step S405 by the shelf priority is as shown in FIG. 10C. That is, shelf 2 and frequency f3 are the best balanced shelf / frequency combination selected in step S405. Therefore, in this case, since the frequency of the call 1802 is different from the frequency obtained in step S405 (step S304, YES), the call frequency is switched from the frequency fl to the frequency f3 (step S305).
- the radio resource and baseband resource usage status after the frequency and shelf allocation for the packet call 1802 are as shown in FIGS. 11A and 11B.
- the assignment of the packet call 1803 is performed in the same manner as the assignment of the packet calls 1801 and 1802.
- step S403 in FIG. 4 the state of the amount of free radio resources for each set frequency is as shown in FIG. 12A.
- Figure 12B shows the amount of free baseband resources.
- shelf 1 and frequency fl are the best combination of balances selected in step S405 in FIG. Therefore, the usage status of radio resources and baseband resources after allocation of packet call 1803 is as shown in FIGS. 13A and 13B.
- the assignment of packet call 1804 is performed in the same manner as the assignment of packet calls 1801 to 1803.
- the state of the amount of free radio resources for each frequency set in step S403 in FIG. 4 is as shown in FIG. 14A.
- the state of the free baseband resource amount for each shelf set in step S404 is as shown in FIG. 14B.
- the result of multiplying the priority of the frequency set in step S405 by the priority of the shelf is as shown in FIG. 14C. Therefore, shelf 2 and frequency f3 are the best combination of balances selected in step S405 of FIG. Therefore, the radio resource and baseband resource usage status after allocation of the packet call 1804 is as shown in FIGS. 15A and 15B.
- the packet call 1804 has been a call loss in the past, but according to the embodiment of the present invention, it can be assigned without causing a call loss.
- radio network control apparatus 100 performs call allocation while maintaining a balance between the amount of free radio resources and the amount of free baseband resources. Thus, the probability of call loss can be reduced.
- the initialization processing response 203 can be controlled for each shelf.
- the number of wave types is specified, one or more types of frequencies that can be accommodated (fl to f4) may be specified for each shelf.
- fl to f4 may be specified for each shelf.
- a shelf in which the same frequency type as that of the allocated call is specified becomes the allocation destination for the call.
- the W-CDMA system is taken as an example of the communication system.
- the present invention is not limited to this, and other systems can also be implemented.
- the present invention can also be implemented when the call accommodation state changes in the radio base station and the radio network controller other than when a new call occurs or when a handover is performed.
- the baseband signal processing means specifies a high-density card or IC that is not on the shelf.
- the combination of shelf and frequency with the best balance the combination of the ranking based on the free resource amount of the shelf and the rank based on the wireless free resource amount for each frequency is the smallest.
- the power described in the case is not limited to this.
- the priority is higher, the higher the priority, the higher the product of the priorities may be.
- the power (W or WZHz) may be used in which the unit of the radio resource is the processing speed (kbps) similarly to the baseband resource.
- the radio network control apparatus is different from that according to the first embodiment in the method of determining the allocation of radio resources and the allocation of the shelves forming the baseband resources of the radio base station.
- the product of the ratio of the amount of free radio resources to the maximum processing capacity of radio resources for each frequency of the carrier and the ratio of the amount of free baseband resources to the maximum amount of baseband resources per shelf is maximized.
- a method for selecting a combination is described.
- FIG. 16 is a detailed flowchart of step S303 in FIG.
- the radio resource management means 105 calculates the amount of radio free resources for each frequency (step S2401).
- the shelf information management means 101 calculates the amount of free baseband resources for each shelf (step S2402).
- step S2403 the ratio of the amount of free radio resources to the maximum amount of radio resources is calculated.
- step S2405 the product of the ratio of the amount of free radio resources to the carrier frequency and the ratio of the amount of baseband free resources of the shelf is the largest.
- radio network control apparatus 100 assigns a frequency to a call and assigns it to a shelf of baseband signal processing section 111 will be described as a specific example.
- Radio base station 107 and terminals 1705 to 1708 are located in the same state as shown in FIG. 5 as in Embodiment 1, and radio resources between radio base station 107 and terminals, and baseband of radio base station 107
- the resource usage status is assumed to be in the status shown in FIGS. 7A and 7B as in the first embodiment.
- the packet call power for the terminals 1705 to 1708 occurs in the same manner as in the first embodiment.
- the information of the packet call that has occurred is the same as that of the first embodiment.
- step S301 the amount of radio resources used for the assigned call is calculated.
- Figure No. 1 power of 6 The amount of radio resources used is 128kbps.
- step S302 the baseband usage resource amount of the allocated call is calculated. From No. 1 in Figure 6, the amount of baseband resources used is 384kbps.
- step S303 a combination of a shelf and a frequency that provides the best balance between the free resource amount of the baseband and the free resource amount of the radio resource after assignment by the overall control unit is selected.
- step S 2401 in FIG. 16 the amount of free radio resources for each frequency is calculated.
- fl is 640kbps (701a)
- f2 is 0kbps
- f3 is 512kbps (701b)
- f4 is 0kbps.
- step S 2402 if the shelf information management means 101 calculates the amount of free resources in the baseband for each shelf, shelf 1 becomes 896 kbps (701c) and shelf 2 becomes 896 kbps (701d).
- step S2403 the radio resource management means 105 calculates the ratio of the free resource amount to the maximum radio resource amount in the radio resource.
- FIG. 17A is a diagram showing the ratio of the free resource amount to the maximum radio resource amount for each frequency.
- step S2404 the shelf information management means 101 calculates the ratio of the free resource amount to the maximum baseband resource amount in the baseband.
- FIG. 17B is a diagram showing the ratio of the free resource amount to the maximum baseband resource amount.
- step S2405 the control means 106 determines the ratio of the free resource amount to the maximum baseband resource amount calculated in step S2404 for each shelf and the frequency for each frequency as the combination of the most balanced frequency and shelf.
- the combination of the shelf and the frequency with the largest result obtained by multiplying the ratio of the free resource amount to the maximum radio resource amount calculated in step S2403 is selected.
- FIG. 17C is a table showing a state in which the values calculated in steps S2403 to S2404 are multiplied. Since there is a limit on the number of frequencies that can be stored for each shelf, X is marked for combinations that cannot be assigned. From FIG. 17C, the control means 106 selects the combination of shelf 1 and frequency fl as the most balanced combination.
- step S304 of Fig. 3 the control means 106 compares the frequency of the allocated call with the selected frequency, and the frequency fl of the allocated call is the same as the frequency fl of the selected call. Therefore, an allocation request for shelf 1 is transmitted to the radio base station (step S306).
- the radio and baseband usage status after allocation in the radio base station is as shown in Figs. 9A and 9B.
- step S2403 in Fig. 16 Similar to the assignment of the packet call 1801, in step S2403 in Fig. 16, the ratio of the amount of free radio resources to the maximum amount of radio resources for each frequency is calculated.
- FIG. 18A is a diagram showing the ratio of the free radio resource amount to the maximum radio resource amount.
- step S2404 the ratio of the baseband free resource amount to the maximum baseband resource amount for each shelf is calculated.
- FIG. 18B is a diagram showing the ratio of the baseband free resource amount to the maximum baseband resource amount.
- the values calculated in steps S2403 to S2404 are multiplied.
- Figure 18C shows the product of both ratios.
- the control means 106 selects a combination of shelf 2 and frequency f3.
- step S304 of Fig. 3 when the control means 106 compares the frequency of the allocated call with the selected frequency, the control means 106 differs in the frequency f 3 of the allocated call and the frequency f 3 of the selected call.
- step S305 the control means 106 switches from the frequency fl to the frequency f2.
- the usage status of the radio resource and the baseband resource after the allocation of the packet call 1802 is as shown in FIGS. 11A and 11B.
- shelf 1 and frequency fl were selected as the allocation positions, whereas in the resource control method in the present embodiment, control means 106 is wireless.
- the packet call 1803 is assigned in the same manner as the packet calls 1801 to 1802.
- step S2403 in FIG. 16 the ratio of the free resource amount to the maximum radio resource amount for each set frequency is as shown in FIG. 19A.
- step S2404 The ratio of the free baseband resource amount to the maximum baseband resource amount for each shelf set as shown in Fig. 19B is as shown in Fig. 19B.
- the product of the ratios calculated in steps S2403 to S2404 calculated in step S2405 is as shown in FIG. 19C.
- the combination selected in step S2405 is shelf 1, frequency fl.
- the usage status of the radio resource and the baseband resource after the call 1803 is allocated is as shown in FIGS. 13A and 13B.
- Allocation of packet call 1804 is performed in the same manner as allocation of calls 1801 to 1803.
- step S2403 of Fig. 16 the ratio of the free resource amount to the calculated maximum radio resource amount for each frequency is as shown in Fig. 20A.
- step S2404 the ratio of the free resource amount to the maximum processing capacity in the baseband for each shelf calculated is as shown in FIG. 20B.
- step S2405 the product of the ratios calculated in steps S2403 to S2404 calculated in step S2405 is as shown in FIG. 20C.
- the combination selected in step S2405 in FIG. 16 is shelf 2 and frequency f3.
- the packet call 1804 can be allocated without causing a call loss when the resource control method according to the present embodiment is used, even though the call loss has occurred in the prior art. Become.
- radio network control apparatus 100 assigns calls while maintaining the same balance between the amount of free radio resources and the amount of free baseband resources as in the first embodiment. Therefore, the probability of call loss can be reduced compared to the conventional case.
- the present invention is useful for a radio network controller, a radio network control method, and a communication system, and is suitable for improving call accommodation efficiency.
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Abstract
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US11/570,476 US20070238469A1 (en) | 2004-12-01 | 2005-12-01 | Radio Network Control Device, Radio Network Control Method, and Communication System |
JP2006515458A JPWO2006059673A1 (ja) | 2004-12-01 | 2005-12-01 | 無線ネットワーク制御装置、無線ネットワーク制御方法および通信システム |
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US (1) | US20070238469A1 (ja) |
JP (1) | JPWO2006059673A1 (ja) |
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CN101179812B (zh) * | 2007-11-29 | 2012-07-04 | 中兴通讯股份有限公司 | 一种基于动态基带分配的干扰带测量方法 |
JP5472644B2 (ja) * | 2008-11-26 | 2014-04-16 | 日本電気株式会社 | リソース割り当て方法、通信システム、基地局及びプログラム |
CN101800590B (zh) * | 2009-12-25 | 2014-12-10 | 中兴通讯股份有限公司 | Rrm请求、报告方法及bs和系统 |
JP6176515B2 (ja) * | 2012-04-27 | 2017-08-09 | パナソニックIpマネジメント株式会社 | 無線基地局装置、無線資源管理方法、及び無線資源管理プログラム |
CN109842552A (zh) * | 2017-11-27 | 2019-06-04 | 华为技术有限公司 | 网络路由设备、网络数据的传输方法、以及网络接入设备 |
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JP2003319465A (ja) * | 2002-04-26 | 2003-11-07 | Matsushita Electric Ind Co Ltd | 無線基地局装置及びそのユニット資源管理方法 |
JP2004120070A (ja) * | 2002-09-24 | 2004-04-15 | Matsushita Electric Ind Co Ltd | 無線基地局装置及び負荷分散制御方法 |
JP2004312131A (ja) * | 2003-04-03 | 2004-11-04 | Matsushita Electric Ind Co Ltd | 無線基地局のリソース割り当て方法および無線基地局 |
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US6894994B1 (en) * | 1997-11-03 | 2005-05-17 | Qualcomm Incorporated | High data rate wireless packet data communications system |
US7986660B2 (en) * | 2000-10-09 | 2011-07-26 | Qualcomm Incorporated | Channel allocation for communication system |
FI113609B (fi) * | 2001-06-29 | 2004-05-14 | Nokia Corp | Tukiaseman resurssinhallinta ja tukiasema |
US7710866B2 (en) * | 2001-09-27 | 2010-05-04 | Alcatel-Lucent Canada Inc. | Method and apparatus for optimization of redundant link usage in a multi-shelf network element |
US7573862B2 (en) * | 2003-02-06 | 2009-08-11 | Mahdi Chambers | System and method for optimizing network capacity in a cellular wireless network |
US20060285523A1 (en) * | 2003-05-14 | 2006-12-21 | Matsushita Electric Industrial Co., Ltd. | Resource relocation method, base station, and radio network control device |
AU2003291799A1 (en) * | 2003-12-09 | 2005-06-29 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and device for managing resources shared by different operators in a communication system |
WO2005086509A1 (en) * | 2004-03-04 | 2005-09-15 | Utstarcom Telecom Co., Ltd | The loads supporting mehod and system in radio base station |
-
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- 2005-12-01 CN CNA2005800207237A patent/CN1973565A/zh active Pending
- 2005-12-01 US US11/570,476 patent/US20070238469A1/en not_active Abandoned
- 2005-12-01 WO PCT/JP2005/022070 patent/WO2006059673A1/ja active Application Filing
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JP2003319465A (ja) * | 2002-04-26 | 2003-11-07 | Matsushita Electric Ind Co Ltd | 無線基地局装置及びそのユニット資源管理方法 |
JP2004120070A (ja) * | 2002-09-24 | 2004-04-15 | Matsushita Electric Ind Co Ltd | 無線基地局装置及び負荷分散制御方法 |
JP2004312131A (ja) * | 2003-04-03 | 2004-11-04 | Matsushita Electric Ind Co Ltd | 無線基地局のリソース割り当て方法および無線基地局 |
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