JP5472401B2 - Wireless terminal, wireless communication system, and connection method in wireless terminal - Google Patents

Description

  The present invention relates to a wireless terminal, a wireless communication system, and a connection method in the wireless terminal.

  In wireless communication, femtocells are being applied. The femtocell covers a narrow range of cells, can eliminate a dead zone of radio waves in a house or office, and can secure stable high-speed communication by occupying radio resources.

  When starting the femtocell communication, for example, the user presses a call button of a wireless terminal such as a mobile phone. The wireless terminal starts call connection processing in response to pressing of the call button from the user.

  The call connection process is divided into a wireless link connection between the wireless terminal and the RAN (Radio Access Network) and a wireless access line connection between the wireless terminal and the core network. Specifically, when receiving a communication start request from a user, the wireless terminal establishes a wireless link connection with the RAN via the femtocell wireless base station (NodeB). Then, the wireless terminal performs authentication and concealment processing with CN (Core Network) via NodeB and RNC (Radio Network Controller), and connects the wireless access line. Thereby, the wireless terminal can communicate with the communication partner.

  Conventionally, there has been provided a net service that predicts an area where a mobile object is scheduled to move and allocates communication resources in advance (see, for example, Patent Document 1). Further, there is provided a channel reservation method in which when a reception level of an adjacent area of a mobile terminal exceeds a predetermined value, the mobile terminal is reserved and the call is not disconnected when the area moves (see, for example, Patent Document 2). ).

Special Table 2000-502521 JP-A-6-121373

However, if a wireless link and a wireless access line are connected upon receiving a communication start request from the user, it takes time until the communication starts.
In one aspect, an object of the present invention is to provide a wireless terminal, a wireless communication system, and a connection method in the wireless terminal that can shorten the time until communication is started.

  In one proposal, a wireless terminal comprising a receiver and a transmitter is provided. A receiving part receives the alerting | reporting information which notifies that it is a femto cell from the radio base station which comprises a femto cell. The transmission unit transmits a signal requesting radio base station to allocate radio resources based on the broadcast information. Then, the wireless terminal executes connection processing in which the wireless resource assignment request is omitted using the wireless resource assigned by the signal requesting the assignment of the wireless resource.

  According to one aspect, it is possible to shorten the time until communication can be started.

It is a figure explaining the structural example of a radio | wireless terminal, a radio base station, and a radio | wireless control apparatus. It is the figure which showed the system structural example of the femtocell which concerns on 1st Embodiment. It is a functional block diagram of Node B of a femto cell. It is a functional block diagram of UE. It is a functional block diagram of RNC. It is a functional block diagram of CN. It is a connection sequence diagram of a radio link and a radio access line. It is the figure which showed the system structural example of the femtocell which concerns on 2nd Embodiment. It is a connection sequence diagram of a radio link and a radio access line. It is the figure which showed the system structural example of the femtocell which concerns on 3rd Embodiment. It is a functional block diagram of Node B of a femto cell. It is a connection sequence diagram of a radio link and a radio access line.

  FIG. 1 is a diagram illustrating a configuration example of a wireless terminal, a wireless base station, and a wireless control device. As shown in the figure, the wireless terminal 1 has broadcast information receiving means 1a and wireless link connection means 1b. The radio base station 2 has broadcast information transmission means 2a. The wireless control device 3 includes a wireless link setting request receiving unit 3a and a wireless link connection unit 3b.

  The radio base station 2 is a femtocell radio base station. The broadcast information transmitting unit 2a of the radio base station 2 transmits broadcast information including information indicating that the cell of the radio base station 2 is a femto cell.

  The broadcast information receiving unit 1 a of the wireless terminal 1 receives broadcast information from the wireless base station 2. When the broadcast information received by the broadcast information receiving unit 1a includes information indicating that it is a femtocell, the radio link connection unit 1b establishes a radio link with the radio control device 3 that controls the radio base station 2. Connecting. The wireless link connection unit 1b makes a wireless link setting request to the wireless control device 3 to connect the wireless control device 3 and the wireless link.

The radio link setting request receiving unit 3 a of the radio control device 3 receives a radio link setting request from the radio terminal 1.
The wireless link connection unit 3b connects the wireless terminal 1 and the wireless link by receiving the wireless link setting request from the wireless link setting request receiving unit 3a.

  The operation of FIG. 1 will be described. When the wireless terminal 1 is located in the cell of the wireless base station 2, the wireless terminal 1 receives the broadcast information of the wireless base station 2. This broadcast information includes information indicating that the cell of the radio base station 2 is a femto cell.

  The radio link connection unit 1 b of the radio terminal 1 connects the radio link with the radio control device 3 via the radio base station 2 when the broadcast information reception unit 1 a receives the broadcast information of the radio base station 2.

  When the wireless terminal 1 receives a wireless communication start request from the user, the wireless link has already been connected, so the processing may be started from the connection of the wireless access line. That is, the wireless terminal 1 can shorten the communication start time by the time for connecting the wireless link.

  Thus, the radio base station 2 transmits broadcast information indicating that it is a femto cell. The wireless terminal 1 can detect the location in the femtocell based on the notification information from the wireless base station 2. When the wireless terminal 1 detects the location of the femtocell, the wireless terminal 1 connects the wireless control device 3 and the wireless link in advance. As a result, when the wireless terminal 1 receives a communication start request from a user, the wireless terminal 1 can connect a wireless access line without connecting a wireless link. Time to start can be shortened.

  In addition, the radio base station 2 configuring the femtocell broadcasts broadcast information for notifying that it is a femtocell in the femtocell. Then, the wireless terminal 1 in the standby state receives the notification information. Then, in response to this reception, there is no incoming call to the wireless terminal 1, and the wireless terminal 1 sends a message requesting the wireless base station 2 to allocate wireless resources even though there is no outgoing operation by the user. Transmit by radio signal. The radio control device in the mobile communication network that has received the message from the radio base station 2 or the radio base station 2 uses radio resources used for radio communication between the radio terminal 1 and the radio base station 2 constituting the femtocell. To capture. When the radio base station 2 provides a radio communication service limited to a predetermined radio terminal (for example, a radio terminal registered in the memory of the radio base station 2 constituting the femtocell), the radio terminal 1 In the situation where there is no incoming call and no outgoing operation is actually performed in the wireless terminal 1, even if the wireless resource is secured in advance, the secured wireless resource is originally not serviced in the other wireless terminal (wireless base station 2. The wireless terminal is not scheduled to be provided to a wireless terminal that is not registered as a wireless terminal.

  In short, a radio base station constituting a femto cell transmits as broadcast information that it is a femto cell, and the radio terminal that has received the broadcast information receives the radio base station under a situation where no incoming call or no outgoing operation is performed. Transmits a signal requesting to secure radio resources. Then, the radio base station secures the radio resource according to the request, and then uses the radio resource already secured when a transmission operation is performed in the radio terminal, thereby performing a processing sequence for securing the radio resource. By omitting it and executing the subsequent connection process, the wireless communication service can be provided more quickly.

The radio base station 2 can also have the functions of the radio link setting request receiving unit 3a and the radio link connection unit 3b in FIG.
Next, a first embodiment will be described in detail with reference to the drawings.

  FIG. 2 is a diagram illustrating a system configuration example of a femtocell according to the first embodiment. FIG. 2 shows a CN 11, an RNC 12, an IP (Internet Protocol) network 13, a femto cell 14, UEs (User Equipment) 15 and 17, and a Node B 16. CN11, RNC12, NodeB16, and UE17 of FIG. 2 are existing radio network systems, and CN11, RNC12, IP network 13, femtocell 14, and UE15 are femtocell radio network systems. The UEs 15 and 17 are, for example, mobile phones.

  The wireless network system of FIG. 2 performs wireless communication by a communication method such as W-CDMA (Wideband Code Division Multiple Access) and LTE (Long Term Evolution). The wireless network system of FIG. 2 shows an example of W-CDMA, and shows an example in which the femtocell 14 is treated as equivalent to the W-CDMA NodeB 16. In LTE, the functions of the RNC 12 and the NodeB 16 in FIG. 2 are realized by the same device (eNodeB), and the functions of the RNC 12 and the femtocell 14 are realized by the same device (eNodeB).

  The femtocell 14 includes a NodeB that is wirelessly communicated with the UE 15 (not shown). The Node B of the femtocell 14 is installed in a house or office and covers wireless communication in the range of several tens of meters.

The Node B of the femtocell 14 periodically broadcasts broadcast information. The broadcast information includes information indicating that it is transmitted from the femtocell.
When the UE 15 enters the femto cell 14, the UE 15 receives broadcast information of the femto cell 14. The UE 15 can recognize that it has been in the femtocell 14 by receiving the broadcast information of the femtocell 14.

When the UE 15 recognizes that it is in the femtocell 14, the UE 15 establishes a radio link connection with the RNC 12 in advance via the NodeB of the femtocell 14.
The user of UE15 presses the transmission button of UE15, for example, when starting communication using UE15. The UE 15 establishes a connection between the CN 11 and the radio access line when the call button is pressed. Since the UE 15 has connected the radio link in advance, the call connection is started from the connection of the radio access line, and radio communication is performed with the communication partner.

  In addition, since NodeB16 is not NodeB of a femtocell, the information which shows that it is a femtocell is not contained in the alerting | reporting information transmitted from NodeB16. Therefore, the UE 17 does not connect a radio link in advance even if it is in the cell of the Node B 16. The UE 17 receives a press of a call button from the user, establishes a radio link, establishes a radio access line, and communicates with a communication partner.

  In this way, the Node B of the femtocell 14 broadcasts broadcast information. When receiving the broadcast information of the femtocell 14, the UE 15 recognizes that it belongs to the femtocell 14 and establishes a radio link connection with the RNC 12 in advance. Thereby, when starting communication, the UE 15 does not need to perform a wireless link connection process, and thus it is possible to shorten the time from the communication request until the communication can be started.

  FIG. 3 is a functional block diagram of the Node B of the femto cell. As illustrated in FIG. 3, the Node B of the femtocell 14 includes a radio resource management unit 21 and a broadcast information notification unit 22.

  The radio resource management unit 21 manages radio resources allocated to the UE 15. For example, the radio resource management unit 21 allocates and manages radio physical resources such as a radio frequency and a code to the UE 15 that has made a radio link connection request.

  The notification information notification unit 22 periodically notifies the notification information within the femtocell 14 area. The broadcast information includes information indicating that the broadcast information is broadcast from the femtocell 14. Thereby, UE15 can recognize having been in femtocell 14 by receiving the alerting | reporting information of NodeB of femtocell 14. FIG.

FIG. 4 is a functional block diagram of the UE. As illustrated in FIG. 4, the UE 15 includes a call control unit 31, a radio resource management unit 32, and a broadcast information processing unit 33.
The call control unit 31 performs call connection processing. When the broadcast information processing unit 33 determines that the UE 15 has been in the femtocell 14, the call control unit 31 requests connection of the radio link with the RNC 12 via the NodeB of the femtocell 14. In addition, when the call control unit 31 is located in the femtocell 14 and receives a communication start request from the user, the call control unit 31 performs connection processing between the CN 11 and the wireless access line without performing wireless link connection processing. .

  When it is determined that the UE 15 is not located in the femtocell 14, the call control unit 31 makes an existing call connection request when receiving a wireless communication request from the user. That is, the call control unit 31 receives a communication start request from the user, establishes a wireless link connection, and then performs a wireless access line connection process.

  The radio resource management unit 32 manages radio resources used for radio communication. The radio resource used for radio communication is notified from the NodeB or NodeB 16 of the femtocell 14.

  The broadcast information processing unit 33 determines whether the UE 15 has been in the femtocell 14 based on the received broadcast information. The broadcast information transmitted from the Node B of the femtocell 14 stores femtocell information. In this case, the broadcast information processing unit 33 recognizes that the UE 15 has been in the femtocell 14.

FIG. 5 is a functional block diagram of the RNC. As shown in FIG. 5, the RNC 12 includes a call control unit 41, a radio resource management unit 42, and a femtocell control unit 43.
The call control unit 41 performs call connection processing. For example, when a radio link connection request is received from the UE 15 located in the femtocell 14, the radio link connection with the UE 15 is established and maintained in advance. When the call control unit 41 receives a call connection request from the existing NodeB 16, the call control unit 41 establishes a radio link connection with the UE 17.

  The radio resource management unit 42 manages radio logical resources used for radio communication of the UEs 15 and 17. The radio resource management unit 42 receives information on radio resources allocated to the UEs 15 and 17 from the NodeB and the NodeB 16 of the femtocell 14 and manages radio logical resources.

  The femtocell control unit 43 manages the femtocell 14. For example, it manages the attributes of the femtocell 14 (the presence of femtocells), and manages information such as how many radio channels there are and how many initial power values there are.

  FIG. 6 is a functional block diagram of the CN. As shown in the figure, the CN 11 has a call control unit 51. Note that the CN 11 in FIG. 6 is actually a core network device (switch) constituting the CN 11 in FIG.

  The call control unit 51 performs call connection processing for the UEs 15 and 17. The call control unit 51 performs location registration of the UEs 15 and 17 and performs authentication processing for the UEs 15 and 17 and confidential processing for performing confidential communication. Further, the call control unit 51 sets a radio access line in response to a request from the UEs 15 and 17.

FIG. 7 is a connection sequence diagram of the radio link and the radio access line.
In step S1, the Node B of the femtocell 14 periodically broadcasts broadcast information.

  In step S <b> 2, it is assumed that the UE 15 enters an area that receives the broadcast information of the Node B of the femtocell 14. Thereby, the UE 15 receives the broadcast information of the femtocell 14 and recognizes that it has been in the femtocell 14.

  In step S <b> 3, the UE 15 requests the RNC 12 to set a radio link connection between the UE 15 and the RNC 12 via the Node B of the femtocell 14. The radio link is a link between the UE and the RAN and is a so-called radio. In 3G, this is called Radio Link, and a physical radio frequency or the like is secured on the NodeB side by instructing the NodeB from the RNC to a request for setting the Radio Link. As a result, the UE and NodeB are wirelessly connected.

In step S <b> 4, the RNC 12 receives a radio link setup request from the UE 15 and makes a radio link setup request to the Node B of the femtocell 14.
In step S5, the Node B of the femtocell 14 receives a radio link setting request from the RNC 12 and acquires radio resources to be allocated to the UE 15.

  In step S <b> 6, the Node B of the femtocell 14 returns a radio link setting response to the RNC 12. At this time, the NodeB of the femtocell 14 transmits information on the radio resource allocated to the UE 15 to the RNC 12.

  In step S <b> 7, the RNC 12 receives a radio link setting response from the Node B of the femtocell 14. The RNC 12 acquires radio resources allocated to the UE 15 and transmitted from the Node B of the femtocell 14.

  In step S8, the RNC 12 issues a radio link setting instruction to the UE 15 via the Node B of the femto cell 14. At this time, the RNC 12 notifies the radio resource acquired for the UE 15.

  In step S9, the UE 15 manages the radio resource notified from the RNC 12 in accordance with the radio link setting instruction from the RNC 12, and uses it for radio communication. The UE 15 returns a radio link setting response to the RNC 12 via the Node B of the femto cell 14.

  In step S10, the UE 15, the RNC 12, and the Node B of the femtocell 14 complete the connection of the radio link. As a result, the UE 15 maintains the radio link connection with the Node B and the RNC 12 of the femtocell 14 while staying in the femtocell 14.

In step S <b> 11, the UE 15 receives radio button pressing from the user and starts wireless communication.
In step S12, the UE 15, the Node B of the femtocell 14, the RNC 12, and the CN 11 perform authentication / confidential processing. For example, the CN 11 authenticates whether the UE 15 that has requested connection of the radio access line is a valid UE. Moreover, UE15 and RNC12 perform the process for performing secret communication between UE15-RNC12 based on the instruction | indication from CN11.

In step S <b> 13, the UE 15 makes a call connection request to the CN 11 via the NodeB and the RNC 12 of the femtocell 14.
In step S14, the UE 15, the Node B of the femtocell 14, the RNC 12, and the CN 11 perform a radio access line connection process. The radio access line is an access line including UE to CN and exchanges user data. In 3G, it is called RAB (Radio Access Bearer).

In step S15, the CN 11 completes the connection process of the radio access line and returns a call connection response to the UE 15.
In step S16, the UE 15 exchanges user data (for example, call data) with the communication partner via the wireless access line.

  Thus, the NodeB of the femtocell 14 broadcasts broadcast information including information indicating that it is a femtocell. The UE 15 recognizes that it has been in the femtocell 14 by receiving this broadcast information. When the UE 15 is in the femtocell 14, the UE 15 connects a radio link to the RNC 12. Thereby, when starting communication, the UE 15 only needs to connect the radio access line without connecting the radio link, so the time until the user can start communication after making a communication request is shortened. be able to.

  Note that the UE (the UE that receives the call) that is the communication partner of the UE 15 is also connected to the radio link in the same manner as the UE 15 when located in the femtocell. Therefore, when there is a call request from the UE 15, the communication partner UE may connect the wireless line without performing the wireless link connection processing. Thereby, it is possible to shorten the time from when the user makes a communication request until the user can start communication.

  Next, a second embodiment will be described in detail with reference to the drawings. In the first embodiment, the Node B of the femtocell transmits broadcast information, and the UE receives the broadcast information, thereby recognizing that the UE is in the femtocell. In the second embodiment, in the location registration of the CN UE, the CN recognizes the location of the femtocell of the UE.

  FIG. 8 is a diagram illustrating a system configuration example of a femtocell according to the second embodiment. FIG. 8 shows a CN 61, an RNC 62, an IP network 63, a femto cell 64, UEs 65 and 67, and a Node B 66. CN61, RNC62, NodeB66, and UE67 of FIG. 8 are existing radio network systems, and CN61, RNC62, IP network 63, femtocell 64, and UE65 are femtocell radio network systems. The UEs 65 and 67 are, for example, mobile phones. The wireless network system in FIG. 8 performs wireless communication by a communication method such as W-CDMA and LTE, as in FIG.

  In mobile communication, the CN 61 performs location registration as to which cell the UEs 65 and 67 are located. Therefore, the CN 61 can determine whether or not the UEs 65 and 67 are located in the femtocell 64.

  When the CN 61 detects the presence in the femtocell 64 by the location registration of the UEs 65 and 67, the CN 61 requests the RNC 62 to perform pre-connection of the radio link of the UE 65. Thereby, UE65 located in RNC62 and femtocell 64 can connect a radio link in advance.

  The UE 67 is located in the Node B 66 cell. Since Node B 66 is not a femto cell, CN 61 does not request RNC 62 to perform pre-connection of the radio link of UE 67.

  Thus, the CN 61 detects that the UE 65 has been in the femtocell 64 by the location registration of the UEs 65 and 67. Then, the CN 61 performs pre-connection of the radio link of the UE 65 to the RNC 62. Thereby, when starting communication, the UE 65 does not need to perform a wireless link connection process, and thus it is possible to shorten the time from the communication request to the start of communication.

  The function of each device will be described. The NodeB of the femtocell 64 includes a radio resource management unit and a broadcast information notification unit, similar to the NodeB of the femtocell 14 illustrated in FIG. The broadcast information apparatus unit may or may not include information indicating that the cell is a femto cell in the broadcast information as in FIG. This is because, in the femtocell radio system of FIG. 8, it is determined whether or not the UE 65 has been in the femtocell 64 by the location registration of the UE 65 of the CN 61.

  The UE 65 has functions of a call control unit and a radio resource management unit, like the UE 15 shown in FIG. Since the UE 65 does not determine that the UE 65 has been in the femto cell 64 based on the broadcast information broadcast from the femto cell 64, the UE 65 does not have a function of the broadcast information processing unit related to femto cell identification. The call control unit of the UE 65 connects the RNC 62 and the radio link in response to the radio link connection request transmitted from the CN 61.

The RNC 62 includes a call control unit, a radio resource management unit, and a femto cell control unit, similar to the RNC 12 illustrated in FIG.
The CN 61 has a call control unit, like the CN 11 shown in FIG. Note that the call control unit of the CN 61 determines whether or not the UEs 65 and 67 are located in the femto cell when the UEs 65 and 67 are registered. Further, when the call control unit determines that the UE is located in the femtocell, the call control unit requests the RNC 62 to pre-connect the UE 65 and the radio link.

FIG. 9 is a connection sequence diagram of the radio link and the radio access line.
In step S21, the CN 61 registers the position of the UE 65. For example, the UE 65 receives broadcast information from the NodeB, and transmits cell information included in the broadcast information to the CN 61. The CN 61 performs location registration to which cell the UE 65 belongs based on the cell information received from the UE 65.

  In step S22, the CN 61 detects whether or not the location (cell) to which the UE 65 belongs is the femtocell 64 by the location registration in step S21. CN61, what cell is aware whether the femtocell (storage) in advance.

In step S23, the CN 61 requests the RNC 62 to perform pre-connection of the radio link with the UE 65.
In step S24, the RNC 62 receives the radio link pre-connection request from the CN 61 and makes a radio link pre-connection request to the UE 65 via the Node B of the femto cell 64.

  In step S25, when the UE 65 receives the radio link pre-connection request from the RNC 62, the UE 65 requests the RNC 62 to set the radio link between the UE 65 and the RNC 62 via the Node B of the femto cell 64.

Hereinafter, the process of step S26-step S38 is a process similar to step S4-step S16 demonstrated in FIG. 7, The description is abbreviate | omitted.
Thus, the CN 61 determines whether or not the UEs 65 and 67 are located in the femtocell 64 by the location registration of the UEs 65 and 67. Then, the CN 61 requests the RNC 62 to pre-connect the radio link of the UE 65 located in the femtocell 64. Thereby, when starting communication, the UE 65 does not need to perform a wireless link connection process, and thus it is possible to shorten the time from the communication request to the start of communication.

  Next, a third embodiment will be described in detail with reference to the drawings. In the first embodiment, the Node B, RNC, and CN of the femtocell are configured by different devices. In the third embodiment, the Node B of the femtocell incorporates RNC and CN functions (Collapsed type).

  FIG. 10 is a diagram illustrating a system configuration example of a femtocell according to the third embodiment. FIG. 10 shows a CN 71, an RNC 72, an IP network 73, a femto cell 74, UEs 75 and 77, and a Node B 76. CN71, RNC72, NodeB76, and UE77 of FIG. 10 are existing radio network systems, and CN71, IP network 73, femtocell 74, and UE75 are femtocell radio network systems. The UEs 75 and 77 are, for example, mobile phones. The wireless network system in FIG. 10 performs wireless communication by a communication method such as W-CDMA and LTE, as in FIG.

  The NodeB of the femtocell 74 periodically transmits broadcast information as in the first embodiment. The broadcast information includes information indicating that the broadcast information is transmitted from the femtocell.

  When the UE 75 enters the cell of the femto cell 74, the UE 75 receives the broadcast information of the femto cell 74. Similarly to the first embodiment, the UE 75 receives the broadcast information of the femtocell 74, thereby recognizing that the UE 75 is in the femtocell 74, and establishes a radio link connection with the femtocell 74.

  The radio network of the femtocell 74 in FIG. 10 is a Collapsed type, and the NodeB of the femtocell 74 has functions of RNC and CN. For this reason, the Node B of the femtocell 74 can allocate radio resources to the UE 75 independently of the RNC 72. Thereby, even if UE75 connects a radio link beforehand, it can avoid useless radio resource reservation of RNC72.

  For example, in the example of FIG. 2, the RNC 12 must manage the radio resource allocation of the UEs 15 and 17. Therefore, if the UE 15 is in the femtocell 14 and connects to the radio link in advance, the radio resources of the RNC 12 are continuously reserved wastefully. On the other hand, in the case of the example of FIG. 10, the Node B of the femtocell 74 allocates radio resources to the UE 75 located in the femtocell 74 separately from the RNC 72. As a result, the RNC 72 can effectively allocate radio resources to the UE 77 belonging to the cell of the Node B 76.

  When the Node B of the femtocell 74 performs a wireless link connection, it also performs a wireless access line connection. This is because the Node B of the femtocell 74 also has a CN function. Therefore, when there is a call origination request from the user, the UE 75 can exchange user data by setting a line with a communication partner without connecting a radio link and a radio access line.

  Thus, in the Collapsed type, the Node B of the femtocell 74 has the functions of the RNC and CN. Therefore, when the UE 75 is in the femtocell 74, the UE 75 performs in advance until the connection of the radio access line. Can do. Thereby, UE75 should just connect a line | wire with a communication other party, when starting communication with a communication other party, and can shorten time until it can start communication after a user requests | requires a communication.

  FIG. 11 is a functional block diagram of a Node B of a femto cell. As illustrated in FIG. 11, the Node B of the femtocell 74 includes a radio resource management unit 81, a call control unit 82, and a broadcast information notification unit 83.

  The radio resource management unit 81 manages radio resources allocated to the UE 75. The radio resource management unit 81 manages physical radio resources such as a radio frequency and a code assigned to the UE 75, for example. The radio resource management unit 81 allocates and manages radio physical resources to the UE 75 based on instructions from the call control unit 82.

  The call control unit 82 performs call connection processing. The call control unit 82 also has RNC and CN functions. The call control unit 82 establishes a radio link connection and a radio access line connection with the UE 75 residing in the femtocell 74 in advance.

  Further, when the call control unit 82 is located in the femtocell 74 and receives a communication start request from the user, the call control unit 82 does not perform connection processing of the wireless link and the wireless access line, and does not connect the communication partner. Process. In addition, the call control unit 82 registers the location of the UE 75 belonging to the femtocell 74, and performs authentication and concealment processing of the UE 75 at the time of wireless access line connection processing.

  The notification information notification unit 83 periodically notifies the notification information within the femtocell 74 area. The broadcast information includes information indicating that the broadcast information is broadcast from the femtocell 74. Thereby, UE75 can recognize having been in femtocell 74 by receiving the broadcast information of NodeB of femtocell 74.

The function of the UE 75 is the same as the functional block described in FIG. However, the UE 75 connects the Node B of the femtocell 74 with a radio link and a radio access line.
FIG. 12 is a connection sequence diagram of the radio link and the radio access line.

In step S41, the Node B of the femtocell 74 periodically notifies the notification information.
In step S42, it is assumed that the UE 75 has entered an area where the broadcast information of the Node B of the femtocell 74 is received. As a result, the UE 75 receives the broadcast information of the femtocell 74 and recognizes that it has been in the femtocell 74.

In step S43, the UE 75 issues a radio link setting request to the Node B of the femto cell 74.
In step S44, the NodeB of the femtocell 74 receives a radio link setting request from the UE 75, and captures radio resources to be allocated to the UE 75.

  In step S <b> 45, the UE 75 manages radio resources notified from the NodeB of the femtocell 74 in accordance with a radio link setting instruction from the NodeB of the femtocell 74.

In step S46, the UE 75 returns a radio link setting response to the Node B of the femto cell 74.
In step S47, the UE 75 and the Node B of the femto cell 74 complete the wireless link connection process.

  In step S48, the UE 75 and the Node B of the femto cell 74 perform authentication / confidential processing. For example, the Node B of the femtocell 74 authenticates whether the UE 75 is a valid UE. Further, the UE 75 and the Node B of the femto cell 74 perform processing for performing secret authentication communication between the UE 75 and the Node B of the femto cell 74.

In step S49, the UE 75 issues a call connection request to the Node B of the femto cell 74.
In step S50, the UE 75 and the Node B of the femtocell 74 perform connection processing of a radio access line for exchanging user data. At this time, the UE 75 and the Node B of the femto cell 74 perform the connection process of the radio access line at the lowest rate (not necessarily the lowest rate). This is the quality data of the packet that the UE 75 communicates, the service contract that the user has, the host device (CN (exchange) / Internet) that manages these information It is because it is not understood unless it is).

In step S <b> 51, the Node B of the femtocell 74 returns a call connection response to the UE 75.
In step S52, the UE 75 and the Node B of the femto cell 74 complete the connection process of the radio access line.

In step S <b> 53, the UE 75 starts wireless communication upon receiving a press of a call button from the user.
In step S54, the NodeB of the femtocell 74 receives a communication start request from the UE 75, and performs line setting for exchanging user data with the communication partner (CN / Internet).

In step S55, the UE 75 starts communication with the communication partner.
As described above, when the UE 75 is located in the femtocell, the UE 75 performs a radio link connection and a radio access line connection. Thereby, UE75 should just connect the line | wire with the communication other party side, when starting communication with a communication other party, and can shorten time until it can start communication after a user requests | requires communication.

  In the above, the Collapsed type in the first embodiment has been described. However, the Collapsed type can also be applied in the second embodiment. In this case, the Node B of the femto cell 74 detects that the UE 75 has been in the femto cell 74 by the location registration of the UE 75. When the NodeB of the femtocell 74 detects the location of the femtocell 74 of the UE 75, the NodeB makes a radio link pre-connection request to the UE 75. The subsequent processing is the same as the processing after step S43 in FIG.

(Supplementary Note 1) A receiving unit that receives broadcast information that notifies a femtocell from a radio base station that configures the femtocell;
When receiving the broadcast information notifying that it is a femtocell, a transmitter that transmits a signal requesting the radio base station to acquire radio resources in a situation where there is no incoming call and no outgoing operation is performed. Prepared,
A wireless terminal characterized in that, when a transmission operation is performed thereafter, a connection process is performed in which a wireless resource acquisition process is omitted by using a wireless resource acquired by a signal requesting acquisition of the wireless resource.

(Supplementary Note 2) In a wireless terminal that performs wireless communication,
Broadcast information receiving means for receiving broadcast information from a radio base station;
When the broadcast information includes information indicating a femtocell, a radio link connection unit that connects a radio link with a radio control device that controls the radio base station,
A wireless terminal characterized by comprising:

(Supplementary Note 3) Communication start request accepting means for accepting a communication start request from a user;
Radio access line connection means for connecting the core network device and the radio access line by receiving the communication start request;
The wireless terminal according to appendix 2, characterized by comprising:

(Supplementary Note 4) In a wireless terminal that performs wireless communication,
A radio link connection request receiving means for receiving a radio link pre-connection request transmitted when the core network device detects the location of the femtocell of the wireless terminal;
Radio link connection means for connecting a radio link with a radio control device that controls a radio base station by receiving the radio link pre-connection request;
A wireless terminal characterized by comprising:

(Supplementary Note 5) Communication start request accepting means for accepting a communication start request from a user;
Radio access line connection means for connecting the core network device and a radio access line by receiving the communication start request;
The wireless terminal according to appendix 4, characterized by comprising:

(Appendix 6) In a wireless terminal that performs wireless communication,
Broadcast information receiving means for receiving broadcast information from a radio base station;
When the broadcast information includes information indicating a femtocell, a line connection unit that connects a radio link with the radio base station and a radio access line;
A wireless terminal characterized by comprising:

(Appendix 7) Communication start request accepting means for accepting a communication start request from a user;
By receiving the communication start request, communication line connection means for connecting a communication line with a communication partner;
The wireless terminal according to appendix 6, characterized by comprising:

(Supplementary note 8) The wireless terminal according to supplementary note 6, wherein the wireless access line connection means sets the wireless access line with the lowest rate.
(Supplementary Note 9) In a wireless terminal that performs wireless communication,
A radio link connection request receiving means for receiving a radio link pre-connection request transmitted when the core network device detects the location of the femtocell of the wireless terminal;
Line connection means for connecting a radio link with a radio base station by receiving the radio link pre-connection request, and connecting a radio access line;
A wireless terminal characterized by comprising:

(Supplementary Note 10) In a wireless terminal that performs wireless communication,
Broadcast information receiving means for receiving broadcast information from a radio base station;
When the broadcast information includes information indicating a femtocell, a radio link connection unit that connects the radio base station and a radio link;
A wireless terminal characterized by comprising:

(Supplementary Note 11) In a wireless terminal that performs wireless communication,
A radio link connection request receiving means for receiving a radio link pre-connection request transmitted when the core network device detects the location of the femtocell of the wireless terminal;
Radio link connection means for connecting a radio base station and a radio link by receiving the radio link pre-connection request;
A wireless terminal characterized by comprising:

(Additional remark 12) In the radio control apparatus which controls a radio base station,
A radio link setting request receiving means for receiving a radio link setting request to be transmitted when a radio terminal receives broadcast information including information indicating that the radio terminal is a femtocell from the radio base station;
A wireless link connection means for connecting a wireless link with the wireless terminal by receiving the wireless link setting request;
A wireless control device comprising:

(Supplementary Note 13) In a core network device that communicates with a wireless terminal,
Location registration means for performing location registration of the wireless terminal;
A femtocell determining means for determining whether the wireless terminal is located in a femtocell based on the location registration of the wireless terminal;
When the wireless terminal is located in the femtocell, a wireless link connection requesting unit that makes a wireless link connection request to the wireless terminal;
A core network device characterized by comprising:

(Supplementary Note 14) In a radio base station that performs radio communication,
Broadcast information transmitting means for transmitting broadcast information including information indicating that the cell of the radio base station is a femto cell;
In response to a request from the wireless terminal that has received the broadcast information, a wireless link connection instruction unit that transmits a wireless link connection instruction to the wireless terminal;
A radio base station characterized by comprising:

(Supplementary Note 15) In a radio base station that performs radio communication,
A location registration means for registering the location of the wireless terminal;
A femtocell determining means for determining whether the wireless terminal is located in a femtocell based on the location registration of the wireless terminal;
When the wireless terminal is located in the femtocell, a wireless link connection requesting unit that makes a wireless link connection request to the wireless terminal;
A radio base station characterized by comprising:

DESCRIPTION OF SYMBOLS 1 Radio terminal 1a Broadcast information receiving means 1b Radio link connection means 2 Radio base station 2a Broadcast information transmission means 3 Radio control apparatus 3a Radio link setting request receiving means 3b Radio link connection means

Claims (4)

A receiving unit that receives broadcast information for notifying that it is a femtocell from a radio base station constituting the femtocell;
A transmission unit that transmits a signal requesting radio resource allocation to the radio base station based on the broadcast information;
A wireless terminal that performs connection processing in which a radio resource allocation request is omitted using a radio resource allocated by a signal requesting radio resource allocation in response to a transmission operation . In a wireless terminal that performs wireless communication,
A receiving unit for receiving broadcast information from a radio base station;
When the broadcast information includes information indicating a femtocell, a transmission unit that transmits a signal requesting radio resource allocation to the radio base station;
A connection unit that executes connection processing in which a radio resource assignment request is omitted using a radio resource assigned by a signal that requests assignment of the radio resource in response to a call operation ;
A wireless terminal characterized by comprising: In a radio communication system including a radio base station configuring a femtocell and a radio terminal that performs radio communication with the radio base station,
The radio base station is
A first receiving unit that receives a signal requesting radio resource allocation from the radio terminal;
A first transmitter for transmitting broadcast information including information indicating that the cell of the radio base station is a femto cell, and radio resource allocation information for a signal requesting radio resource allocation;
Have
The wireless terminal is
A second receiving unit for receiving the broadcast information;
A second transmitter that transmits a signal for requesting radio resource assignment to the radio base station, when the received broadcast information includes information indicating a femto cell;
A connection unit that executes connection processing in which a radio resource assignment request is omitted using a radio resource assigned by a signal that requests assignment of the radio resource in response to a call operation ;
A wireless communication system comprising: A connection method in a wireless terminal that performs wireless communication,
Receive broadcast information from the radio base station,
When the broadcast information includes information indicating a femto cell, a signal requesting radio resource allocation to the radio base station is transmitted,
In response to a call operation, a connection process is executed by omitting a radio resource allocation request using a radio resource allocated by a signal requesting radio resource allocation.
A connection method in a wireless terminal.

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