JP3891397B2 - Radio resource allocation method, mobile communication system, mobile terminal, and mobile communication network - Google Patents

Radio resource allocation method, mobile communication system, mobile terminal, and mobile communication network Download PDF

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Publication number
JP3891397B2
JP3891397B2 JP2001151488A JP2001151488A JP3891397B2 JP 3891397 B2 JP3891397 B2 JP 3891397B2 JP 2001151488 A JP2001151488 A JP 2001151488A JP 2001151488 A JP2001151488 A JP 2001151488A JP 3891397 B2 JP3891397 B2 JP 3891397B2
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Japan
Prior art keywords
information
type
mobile terminal
received
mobile communication
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
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JP2001151488A
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JP2002345017A (en
Inventor
隆明 佐藤
信能 石川
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株式会社エヌ・ティ・ティ・ドコモ
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Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a radio resource allocation method for allocating radio resources used for transmission of information transmitted and received by the mobile terminal in a mobile communication system in which communication is performed between a mobile terminal and a mobile communication network, and the radio resource The present invention relates to a mobile communication system, a mobile terminal, and a mobile communication network to which an allocation method is applied.
[0002]
[Prior art]
In recent years, in a mobile communication system, not only voice but also various information having different transmission densities, such as character information and images, are transmitted. For this reason, a variable transmission density communication system capable of dynamically setting a transmission density may be employed as a mobile communication system. This variable transmission density communication system measures a traffic flow rate of information transmitted and received by a mobile terminal, and dynamically allocates radio resources according to the measured traffic flow rate.
[0003]
[Problems to be solved by the invention]
However, the traffic flow measurement result is the traffic flow of information transmitted and received by the mobile terminal in the past. Therefore, the allocated radio resource is not always suitable for subsequent information transmission. In particular, when information whose traffic flow rate changes drastically is transmitted, radio resources allocated based on the past traffic flow rate are often not suitable for subsequent information transmission.
[0004]
When appropriate radio resources are not allocated in this way, the radio resources are wasted because the transmission density is excessive, and conversely, transmission delays occur because the transmission density is insufficient. In such a case, it is possible to allocate the optimum radio resource as much as possible by shortening the traffic flow measurement interval and the radio resource allocation interval. Since processing is frequently performed, the load on the entire system increases, which is not a preferable method.
[0005]
The present invention solves the above problems, and an object of the present invention is to provide a radio resource allocation method, a mobile communication network, and a mobile terminal capable of allocating radio resources suitable for information transmitted and received by the mobile terminal. There is.
[0006]
[Means for Solving the Problems]
To achieve the above object, according to the present invention, as described in claim 1, in a mobile communication system in which communication is performed between a mobile terminal and a mobile communication network, information transmitted and received by the mobile terminal is transmitted. In the radio resource allocation method for allocating radio resources to be used for transmission, predetermined information regarding the amount of information transmitted and received by the mobile terminal is acquired prior to transmission of the information, and based on the acquired predetermined information, Radio resources used for transmission of information transmitted and received by the mobile terminal are allocated.
[0007]
In such a radio resource allocation method, predetermined information regarding the amount of information transmitted and received by the mobile terminal is acquired prior to transmission of the information, and is transmitted and received by the mobile terminal according to the acquired predetermined information. Radio resources used for information transmission are allocated, and it is possible to allocate radio resources suitable for information to be transmitted.
[0008]
Further, according to the second aspect of the present invention, in the radio resource allocation method, the predetermined information related to the information amount of information transmitted and received by the mobile terminal is an information amount of information transmitted and received by the mobile terminal. It was.
[0009]
Further, according to the present invention, as described in claim 3, in the radio resource allocation method, an information amount of the information included in a head portion of information transmitted / received by the mobile terminal is acquired. When the information amount of information transmitted / received by the mobile terminal is included in the head part of the information, the information amount can be acquired by adopting such a method.
[0010]
In addition, according to the present invention, in the radio resource allocation method, a command for acquiring an information amount of information transmitted and received by the mobile terminal is issued, and a response to the issued command is provided. The amount of information transmitted / received by a certain mobile terminal is acquired.
[0011]
When there is a command for acquiring the information amount of information transmitted and received by the mobile terminal, the information amount can be acquired by adopting such a method.
[0012]
In addition, according to the present invention, in the radio resource allocation method, an information amount of information transmitted and received by the mobile terminal is measured, and the measured information amount is transmitted and received by the mobile terminal. It was acquired as the amount of information.
[0013]
Since the transmission source can measure the amount of information transmitted or received by the mobile terminal, the amount of information can be acquired by adopting such a method.
[0014]
In addition, according to a sixth aspect of the present invention, in the radio resource allocation method, the predetermined information related to the information amount of information transmitted and received by the mobile terminal includes: a type of information transmitted and received by the mobile terminal; did.
[0015]
Since the information amount of information transmitted and received by the mobile terminal can be estimated to some extent by the type of the information, radio resources suitable for the information to be transmitted are also allocated by allocating radio resources according to the type of information. It becomes possible.
[0016]
Further, according to the present invention, as described in claim 7, in the radio resource allocation method, the type of the information included in the head part of the information transmitted / received by the mobile terminal is acquired.
[0017]
When the type of information transmitted / received by the mobile terminal is included in the head of the information, the type of information can be acquired by adopting such a method.
[0018]
In addition, according to the present invention, in the radio resource allocation method, the use efficiency of a radio resource according to the type of the acquired information and the use efficiency of an arbitrary radio resource are statistically calculated. In comparison, the radio resource having the higher utilization efficiency is assigned.
[0019]
The type of information and the amount of information may not always be related, and in such a case, the radio resource corresponding to the type of information is not suitable for transmission of the information. For this reason, the use efficiency of the radio resource according to the type of acquired information is statistically compared with the use efficiency of any radio resource, and if any radio resource has higher use efficiency, Therefore, it is possible to appropriately allocate radio resources.
[0020]
The invention described in claims 9 to 16 is a mobile communication system suitable for the above-described radio resource allocation method. The invention described in claims 17 to 23 is a mobile terminal suitable for the radio resource allocation method described above, and the invention described in claims 24 to 31 is a mobile terminal suitable for the radio resource allocation method described above. It is a communication network.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating a configuration example of a mobile communication system to which a radio channel allocation method according to an embodiment of the present invention is applied.
[0022]
The mobile communication system 100 shown in the figure includes a radio network controller (RNC) 110, a plurality of base stations 120-1 to 120-n, and any one of radio zones formed by these base stations 120-1 to 120-n. The mobile terminals 130-1 to 130-m are located in Kani. Among these, the radio network controller 110 and the base stations 120-1 to 120-n constitute a mobile communication network.
[0023]
In the mobile communication system 100, information transmitted and received by the mobile terminals 130-1 to 130-m (information transmitted from the mobile communication network to the mobile terminals 130-1 to 130-m and the mobile terminals 130-1 to 130-m). Predetermined information related to the amount of information (information sent to the mobile communication network) is acquired prior to transmission of the information, and is transmitted and received by the mobile terminals 130-1 to 130-m according to the acquired predetermined information. Allocate radio resources used for information transmission.
[0024]
Here, the radio resource indicates a radio resource in a broad sense. For example, in a mobile communication system employing a W-CDMA (Wideband Code Division Multiple Access) method, a physical channel (DPCH) occupied by one mobile terminal or a physical channel (S) shared by a plurality of mobile terminals -CCPCH) Various physical channels with different transmission formats, bandwidth (Spreading Factor), error tolerance in FEC scheme that improves redundancy against transmission errors by adding redundant data to transmission target information, transmission efficiency in FEC scheme A Puncture limit value that is a value related to the target transmission error rate, a target error rate value that is a target transmission error rate at a predetermined transmission power, a bandwidth of a transmission path between a radio network controller and a base station in a mobile communication network, Power control, which is an algorithm for determining QoS, transmission power value, and transmission power value A control algorithm or the like becomes a radio resource.
[0025]
Hereinafter, a first embodiment in which the mobile terminals 130-1 to 130-m acquire predetermined information related to information transmitted and received by the mobile terminals 130-1 to 130-m prior to transmission of the information, and radio network control. A description will be given of a second embodiment in which the apparatus 110 acquires predetermined information related to information transmitted and received by the mobile terminals 130-1 to 130-m prior to transmission of the information.
[0026]
In the first embodiment, each of the mobile terminals 130-1 to 130-m acquires predetermined information (information amount itself or information type) related to information transmitted / received by the mobile terminal prior to transmission of the information.
[0027]
Specifically, in the first acquisition method, the mobile terminals 130-1 to 130-m acquire the information amount of the information included in the head part of the information transmitted and received by the own terminal. For example, when the information transmitted from the mobile terminal 130-1 to 130-m to the mobile communication network is an HTML document, the mobile terminal 130-1 to 130-m acquires the amount of information described in the head part of the HTML document. Further, when the information received by the mobile terminal 130-1 to 130-m from the mobile communication network is an HTML document, the mobile terminal 130-1 to 130-m is described in the head part when the head part of the HTML document is received. Get the amount of information.
[0028]
In the second acquisition method, each of the mobile terminals 130-1 to 130-m issues a command for acquiring the amount of information received by the terminal itself. For example, the http protocol and the ftp protocol have a function of notifying the size of a file downloaded from the server to the client. The mobile terminals 130-1 to 130-m use this function to issue, for example, a LIST command of the ftp protocol to the radio network controller 110. The radio network controller 110 transmits information transmitted from the radio network controller 110 to the mobile terminals 130-1 to 130-m as a response to the LIST command, that is, information received by the mobile terminals 130-1 to 130-m. The file size is notified to the mobile terminals 130-1 to 130-m. The mobile terminals 130-1 to 130-m acquire this file size as the amount of information received.
[0029]
Further, in the third acquisition method, the mobile terminals 130-1 to 130-m measure the information amount of information transmitted by the terminal itself, and acquire the measured information amount as the information amount of information to be transmitted. .
[0030]
When the mobile terminals 130-1 to 130-m acquire the information amount of information transmitted / received by the mobile terminals 130-1 to 130-m prior to the transmission of the information by the first to third methods, The wireless network control device 110 is notified via -1 to 120-n.
[0031]
Based on the notified information amount, the radio network controller 110 allocates radio resources optimal for transmitting information transmitted and received by the mobile terminals 130-1 to 130 -m.
[0032]
On the other hand, in the fourth acquisition method, the mobile terminals 130-1 to 130-m acquire the type of the information included in the header of the information transmitted / received by the own terminal. For example, the Type of Service field in the header (IP header) of an IP packet has a bit length of 8 bits, but 3 bits are unused. Therefore, in the mobile communication system 100, it is promised in advance that eight types of information are assigned to the three unused bits. For example, 0 is other data such as text data, 1 is e-mail data, 2 is music data, 3 is web browsing data, 4 is 64 kbps moving image data, 5 In the case of, video data of 128 kbps is allocated, in the case of 6, video data of 382 kbps, in the case of 7, it is assigned as chat data.
[0033]
The type of information in the Type of service field is, for example, assigned to the information received by the mobile terminals 130-1 to 130-m by the radio network controller 110, and by the mobile terminals 130-1 to 130-m. Information to be transmitted is assigned by the mobile terminals 130-1 to 130-m.
[0034]
Alternatively, using the fact that the type of information can be identified by the port number in the UDP header or the TCP header, the mobile terminals 130-1 to 130-m use their port numbers in the UDP header or the TCP header, Can acquire the type of information to be transmitted, and the type of information received by the terminal can be acquired from the destination port number in the UDP header or TCP header.
[0035]
Further, when the type of information handled by the information transmission source or reception server is recognized in advance, the mobile terminals 130-1 to 130-m recognize the destination address in the IP header, and the destination address. The type of information handled by the server specified in (1) can be acquired as the type of information transmitted by the terminal itself, and the information handled by the server identified by the source address by recognizing the source address in the IP header Can be acquired as the type of information received by the terminal itself.
[0036]
When the type of information is acquired by these methods, the mobile terminals 130-1 to 130-m next notify the radio network control apparatus 110 of the type of information via the base stations 120-1 to 120-n.
[0037]
The radio network controller 110 uses the fact that the amount of information transmitted and received by the mobile terminals 130-1 to 130-m can be estimated to some extent by the type of the information, and based on the notified type of information, An optimal radio resource is allocated to transmit information transmitted and received by the mobile terminals 130-1 to 130-m.
[0038]
FIG. 2 is a flowchart showing an example of processing for assigning radio resources based on the type of information in the radio network controller 110, and the type of information in the Type of Service field is notified from the mobile terminals 130-1 to 130-m. This is an example of the case.
[0039]
The radio network controller 110 acquires the type of information (hereinafter referred to as “ToS value”) in the Type of service field notified from the mobile terminals 130-1 to 130-m (step 101), and stores the ToS table. Update (step 102).
[0040]
FIG. 3 is a diagram illustrating an example of the ToS table. This ToS table shows information on whether or not each ToS value is acquired. The figure shows an example in which ToS values 0, 1, 6, and 7 are notified from the mobile terminals 130-1 to 130-m, and whether or not ToS values 0, 1, 6, and 7 are acquired. “YES” indicates that the ToS value has been acquired, and the presence or absence of acquisition of the ToS values of 2, 3, 4, and 5 indicates “NO”, that is, indicates that the ToS value has not been acquired.
[0041]
After updating the ToS table, the radio network controller 110 next determines whether or not a predetermined time has elapsed since the acquisition of the ToS values notified from the mobile terminals 130-1 to 130-m has started (step 103). ). If the predetermined time has not elapsed, the radio network controller 110 continues the process of acquiring the ToS value (step 101) and updating the ToS table (step 102). That is, the ToS value acquisition (step 101) and the ToS table update (step 102) are continuously performed for a predetermined time after the acquisition of the ToS value is started.
[0042]
On the other hand, when a predetermined time has elapsed since the acquisition of the ToS value has started, the radio network controller 110 selects radio resources based on the ToS table and the radio resource selection table (step 104).
[0043]
FIG. 4 is a diagram illustrating an example of a radio resource selection table. As shown in the figure, in the radio resource selection table, each ToS value is associated with a radio resource specified by a band, quality, and allowable delay. The radio network controller 110 identifies the acquired ToS value based on the ToS table, and selects a radio resource corresponding to the identified ToS value based on the radio resource selection table.
[0044]
Note that when a plurality of ToS values are acquired, the radio network control device 110 selects radio resources necessary for transmitting information corresponding to all these ToS values.
[0045]
After selecting the radio resource in this way, the radio network controller 110 determines whether or not the selected radio resource is the same as the currently assigned radio resource (step 105). If the selected radio resource is not the same as the currently assigned radio resource, the radio network controller 110 performs a process of assigning the radio resource selected in step 104 (step 106). After that, the radio network controller 110 initializes the ToS table, that is, sets all the presence / absence of acquisition of the ToS value in the ToS table to “NO” (step 107), and repeats the processing after the acquisition of the ToS value (step 101). .
[0046]
On the other hand, when the selected radio resource is the same as the currently assigned radio resource, it is not necessary to assign a radio resource again, so the radio network control apparatus 110 does not perform the process of assigning the selected radio resource. The ToS table is initialized (step 107), and the processing after the acquisition of the ToS value (step 101) is repeated.
[0047]
Note that the type of information and the amount of information may not necessarily be related, and in such a case, the radio resource corresponding to the type of information is not suitable for transmission of the information. For this reason, the radio network controller 110 obtains the past statistical utilization efficiency for each radio resource. Then, the wireless network control device 110 compares the past statistical utilization efficiency of the wireless resource according to the acquired information type and the arbitrary wireless resource, and when the arbitrary wireless resource has higher utilization efficiency. May allocate the arbitrary radio resource.
[0048]
Next, a second embodiment will be described. In the second embodiment, the radio network controller 110 acquires predetermined information related to information transmitted and received by the mobile terminals 130-1 to 130-m prior to transmission of the information.
[0049]
Specifically, the radio network controller 110 transmits predetermined information related to information transmitted / received by the mobile terminals 130-1 to 130-m by a method equivalent to the first to fourth acquisition methods in the first embodiment. get.
[0050]
That is, the radio network controller 110 acquires the information amount of the information included in the head part of the information transmitted and received by the mobile terminals 130-1 to 130-m. For example, when the information transmitted by the mobile terminals 130-1 to 130-m is an HTML document, the radio network controller 110 is described in the head part when the head part of the HTML document is received. Get the amount of information. In addition, when the information received by the mobile terminals 130-1 to 130-m, that is, the information transmitted by the wireless network control device 110 is an HTML document, the wireless network control device 110 is described at the top of the HTML document. Get the amount of information.
[0051]
Further, the radio network controller 110 issues a command for acquiring the information amount of information transmitted by the mobile terminals 130-1 to 130-m. The mobile terminals 130-1 to 130-m notify the radio network control apparatus 110 of the amount of information transmitted by the mobile terminals 130-1 to 130-m as responses to the commands. The radio network controller 110 acquires this information amount as the information amount of information transmitted by the mobile terminals 130-1 to 130-m.
[0052]
Also, the radio network controller 110 measures the information amount of information transmitted by itself, and acquires the measured information amount as the information amount of information received by the mobile terminals 130-1 to 130-m.
[0053]
When the wireless network control device 110 acquires the information amount of information transmitted and received by the mobile terminals 130-1 to 130-m by these methods prior to transmission of the information, the wireless network control device 110 moves based on the acquired information amount. An optimal radio resource is allocated to transmit information transmitted and received by the terminals 130-1 to 130-m.
[0054]
Alternatively, the radio network controller 110 acquires the type of the information included in the header of information transmitted / received by the mobile terminals 130-1 to 130-m. For example, as in the first embodiment, it is preliminarily promised that eight types of information are assigned to three unused bits in the Type of Service field in the header (IP header) of the IP packet.
[0055]
The type of information in the Type of service field is, for example, assigned to the information received by the mobile terminals 130-1 to 130-m by the radio network controller 110, and by the mobile terminals 130-1 to 130-m. Information to be transmitted is assigned by the mobile terminals 130-1 to 130-m.
[0056]
Alternatively, as in the first embodiment, the radio network controller 110 can acquire the type of information based on the port number in the UDP header or TCP header, and the source / destination address in the IP header.
[0057]
When the type of information is acquired by these methods, the wireless network control apparatus 110 then uses the optimal wireless for transmitting information transmitted and received by the mobile terminals 130-1 to 130-m based on the type of information. Allocate resources.
[0058]
For example, the radio resource allocation processing when the type of information in the Type of service field is acquired is substantially the same as the processing of the flowchart of FIG. 2 in the first embodiment. However, the radio network controller 110 does not acquire the type of information notified from the mobile terminals 130-1 to 130-m as in step 101 of FIG. To get.
[0059]
If the radio resource corresponding to the information type is not suitable for transmission of the information because the type of information and the amount of information are not related, the radio network controller 110 is similar to the first embodiment. The past statistical utilization efficiency is obtained for each radio resource. Then, the wireless network control device 110 compares the past statistical utilization efficiency of the wireless resource according to the acquired information type and the arbitrary wireless resource, and when the arbitrary wireless resource has higher utilization efficiency. May allocate the arbitrary radio resource.
[0060]
As described above, in the mobile communication system 100 according to the present embodiment, predetermined information (the information amount itself and the type of information) related to the information amount of information transmitted and received by the mobile terminals 130-1 to 130-m is used for transmission of the information. Radio resources used for transmission of information transmitted and received by the mobile terminals 130-1 to 130 -m are allocated in accordance with the acquired predetermined information. For this reason, it becomes possible to allocate the radio | wireless resource suitable for the information transmitted.
【The invention's effect】
As described above, the present invention acquires predetermined information related to the amount of information transmitted and received by the mobile terminal prior to transmission of the information, and information transmitted and received by the mobile terminal according to the acquired predetermined information. The radio resources used for the transmission are allocated, and the radio resources suitable for the information to be transmitted can be allocated.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a configuration example of a mobile communication system.
FIG. 2 is a flowchart illustrating an example of processing for assigning radio resources based on information types.
FIG. 3 is a diagram illustrating an example of a ToS table.
FIG. 4 is a diagram illustrating an example of a radio resource selection table.
[Explanation of symbols]
100 Mobile Communication System 110 Radio Network Controller (RNC)
120-1 to 120-n base stations 130-1 to 130-m mobile terminals

Claims (12)

  1. In a radio resource allocation method for allocating radio resources used for transmission of information transmitted and received by the mobile terminal in a mobile communication system in which communication is performed between the mobile terminal and the mobile communication network,
    Obtaining the type of information transmitted and received by the mobile terminal prior to transmission of the information;
    Statistically comparing the usage efficiency of radio resources according to the type of the acquired information and the usage efficiency of arbitrary radio resources,
    A radio resource allocation method for allocating the radio resource having the higher utilization efficiency .
  2. In the radio | wireless resource allocation method of Claim 1,
    The type of information transmitted and received by the mobile terminal, the radio resource allocation method is the type of information transmitted and received by the mobile terminal.
  3. In the radio | wireless resource allocation method of Claim 2,
    A radio resource allocation method for acquiring a type of information included in a head portion of information transmitted and received by the mobile terminal.
  4. In the radio | wireless resource allocation method of Claim 2,
    Issuing a command to obtain the type of information sent and received by the mobile terminal;
    A radio resource allocation method for acquiring a type of information transmitted and received by the mobile terminal, which is a response to the issued command.
  5. In a mobile communication system in which communication is performed between a mobile terminal and a mobile communication network,
    The mobile terminal
    Information acquisition means for acquiring the type of information transmitted and received by the mobile terminal prior to transmission of the information;
    Information notification means for notifying the mobile communication network of the predetermined information acquired by the information acquisition means;
    With
    The mobile communication network is
    Radio resource allocation that statistically compares the use efficiency of radio resources according to the type of information acquired by the information acquisition means and the use efficiency of arbitrary radio resources and allocates the radio resource with the higher use efficiency Means,
    A mobile communication system comprising:
  6. The mobile communication system according to claim 5 , wherein
    The type of information transmitted and received by the mobile terminal is a type of information transmitted and received by the mobile terminal.
  7. The mobile communication system according to claim 6 , wherein
    The mobile communication system, wherein the information acquisition means acquires a type of the information included in a head portion of information transmitted / received by the mobile terminal.
  8. The mobile communication system according to claim 6 , wherein
    The information acquisition means includes
    Comprising command issuing means for issuing a command for obtaining a type of information received by the mobile terminal;
    A mobile communication system for acquiring a type of information received by the mobile terminal, which is a response from the mobile communication network to a command issued by the command issuing means.
  9. In a mobile communication network that communicates with mobile terminals,
    Information acquisition means for acquiring the type of information transmitted and received by the mobile terminal prior to transmission of the information;
    Radio resource allocation that statistically compares the use efficiency of radio resources according to the type of information acquired by the information acquisition means and the use efficiency of arbitrary radio resources and allocates the radio resource with the higher use efficiency Means,
    A mobile communication network comprising:
  10. The mobile communication network according to claim 9 , wherein
    The type of information transmitted and received by the mobile terminal is a mobile communication network that is the type of information transmitted and received by the mobile terminal.
  11. The mobile communication network according to claim 10 , wherein
    The information acquisition means is a mobile communication network configured to acquire a type of the information included in a head portion of information transmitted / received by the mobile terminal.
  12. The mobile communication network according to claim 10 , wherein
    The information acquisition means includes
    Comprising command issuing means for issuing a command for obtaining a type of information received by the mobile terminal;
    A mobile communication network for acquiring a type of information transmitted by the mobile terminal, which is a response from the mobile terminal to a command issued by the command issuing means.
JP2001151488A 2001-05-21 2001-05-21 Radio resource allocation method, mobile communication system, mobile terminal, and mobile communication network Expired - Fee Related JP3891397B2 (en)

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