CN101023626A - Control and management of access to multiple networks - Google Patents

Abstract

The present invention relates to a mobile communication device and a method of registering from a mobile communication device in a network. A processor in the mobile device may be used to establish a network connection with a server in a network. The mobile device may also include a transceiver that receives information related to the network connection from a server. The processor may use the information, local measurements, or both to determine whether to register with the network.

Description

Control and management of access to multiple networks

Cross References to Related Applications

This application claims priority to U.S. Provisional Patent Application No. 60/589,897, filed July 20, 2004, and U.S. Provisional Application No. 60/675,337, filed April 26, 2005, which are hereby incorporated by reference in their entirety .

technical field

The present application relates generally to communications, and more particularly to methods and systems for controlling and managing access to multiple networks in a wireless communications system.

Background technique

The demand for wireless information services has led to the development of increasing wireless networks. CDMA2000 1x is just one example of a wireless network that provides a wide range of telephony and data services. CDMA2000 lx is a wireless standard promoted by the 3rd Generation Partnership Project 2 (3GPP2) and using Code Division Multiple Access (CDMA) technology. Code division multiple access is a technique that allows multiple users to share the same communication medium using spread spectrum processing. A comparable wireless network widely adopted in Europe is the Global System for Mobile Communications (GSM). Unlike CDMA2000 lx, GSM uses narrowband Time Division Multiple Access (TDMA) to support wireless telephony and data services. Some other wireless networks include the General Packet Radio Service (GPRS), which supports high-speed data services with data rates suitable for e-mail and web browsing applications, and the Universal Mobile Telecommunications System (UMTS). It can deliver broadband voice and data for audio and video applications.

These wireless networks can generally be thought of as wide area networks using cellular technology. Cellular technology is based on a topology that divides a geographic coverage area into cells. In each of these cells is a fixed base station (BTS) that communicates with mobile users. A base station controller (BSC) is typically employed within this geographic coverage area to control the base stations and pass signals to the appropriate gateways for the various packet-switched and circuit-switched networks.

As demand for wireless messaging services continues to grow, mobile devices need to support integrated voice, data and media streaming while providing seamless network coverage between wide-area cellular networks and wireless local area networks (LANs). WLANs generally use standard protocols (such as IEEE 802.11, Bluetooth, etc.) to provide telephony and data services within a small geographic area. The existence of WLANs offers unique opportunities to increase user capacity in wide-area cellular networks by using the WLAN infrastructure to extend cellular communications into unlicensed spectrum ranges.

More recently, various techniques have been employed to allow mobile devices to communicate with different wireless networks. However, before a mobile communication device traversing a wide area cellular network is handed over to a WLAN, certain parameters need to be met to ensure that the quality of service does not degrade to an unacceptable level.

Contents of the invention

One aspect of a mobile communication device is disclosed. The mobile communication device includes a processor configured to establish a network connection with a server in a network; and a transceiver configured to provide the processor with information received from the server, the information relating to the network connection. The processor is also configured to determine whether to register with the network based on the information.

Another aspect of a mobile communication device is disclosed. The mobile communication device includes a processor configured to establish a network connection with a server in the network, and measure at least one of delay, jitter, or packet loss on the network connection. The processor is also configured to determine whether to register with the network based on the at least one measurement.

An aspect of a method of communicating with a network from a mobile communication device is disclosed. The method includes: establishing a network connection with a server in a network; receiving information related to the network connection from the server; and determining whether to register in the network based on the information.

Another aspect of a method of communicating with a network from a mobile communication device is disclosed. The method includes: establishing a network connection with a server in the network; measuring at least one of delay, jitter, or packet loss on the network connection; and determining whether to register in the network based on the at least one measurement.

Yet another aspect of a mobile communication device is disclosed. The apparatus includes: means for establishing a network connection with a server in a network; means for receiving information related to the network connection from the server; and means for determining whether to register in the network based on the information.

Yet another aspect of a mobile communication device is disclosed. The apparatus includes: a module for establishing a network connection with a server in the network; a module for measuring at least one of delay, jitter, or packet loss in the forward direction of the network connection; and determining whether the network connection is based on the at least one measurement Modules registered in .

Obviously, other embodiments of the invention will become apparent from the following detailed description, in which various embodiments of the invention are illustrated. As will be realized, the invention is capable of various other embodiments, and its several details are capable of modification in several respects, all without departing from the scope and spirit of the invention. Accordingly, the drawings and detailed description are illustrative and not present execution.

Description of drawings

In the drawings, various aspects of the wireless communication system are illustrated by way of example, and not by way of limiting the scope of the invention, in which:

FIG. 1 is a functional block diagram of an embodiment of a wireless communication system;

2 is a functional block diagram illustrating one example of a mobile device capable of supporting cellular and wireless local area network communications;

Figure 3 is a flowchart illustrating the functionality of a selection algorithm in a mobile device for registration with a network.

Detailed ways

The detailed description given below in conjunction with the accompanying drawings is for explaining various embodiments of the present invention, rather than representing the only embodiments in which the present invention can be practiced. The detailed description includes specific details to facilitate a comprehensive understanding of the invention. However, it will be apparent to those skilled in the art that the present invention may be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form so as not to obscure the main topic.

In the following detailed description, techniques for selecting a network in a multi-network environment will be described. Techniques will be described for an environment in which mobile communication devices traverse a wide area cellular network with one or more wireless local area networks distributed throughout the cellular coverage area. The mobile communication device may be any suitable device capable of wireless telephony or data communication, such as a cellular phone designed to operate in a CDMA2000 lx network. The mobile communication device can use any suitable protocol to access the wireless local area network, including, for example, IEEE 802.11. Although these techniques may be described for a cellular telephone environment capable of communicating with IEEE 802.11 networks, those skilled in the art will appreciate that these techniques may be extended to other mobile communication devices capable of accessing multiple networks. For example, these techniques can be applied to a mobile communication device capable of switching between a CDMA2000 lx network and a GSM network. It is also possible to apply these techniques to mobile communication devices capable of accessing a single network, such as IEEE 802.11 phones. The IEEE 802.11 phone can be configured to connect to the WLAN only if certain parameters indicate that the quality of service is acceptable. Therefore, references to a cellular telephone capable of communicating with an IEEE 802.11 network, or any other specific embodiment, are merely illustrative of aspects of the present invention, which have broad applicability.

Figure 1 is a functional block diagram of one embodiment of a wireless communication system. A series of dotted lines are used to illustrate that the mobile device 102 is passing through the wide area cellular network 104 . The cellular network 104 includes a BSC 106 that supports multiple BTSs throughout the cellular coverage area. For simplicity, only a single BTS 108 is shown in FIG. 1 . A mobile switching center (MSC) 110 may be used to provide a gateway for a public switched telephone network (PSTN) 112 . Although not shown in FIG. 1 , the cellular network 104 may employ multiple BSCs, each supporting any number of BTSs to extend the geographic coverage of the cellular network 104 . When multiple BSCs are used in the entire cellular network 104, the MSC 110 can also be used to coordinate the communication between the BSCs.

Initially, the mobile device 102 is at location A in FIG. 1 . As the mobile device 102 moves from location A to location B through the cellular network 104 , it enters the coverage area of the wireless local area network 114 . Wireless local area network 114 may be an IEEE 802.11 network, or any other suitable network. The wireless local area network 114 includes an access point 116 for enabling the mobile device 102 to communicate with an IP network 118 . Server 120 may be used to connect IP network 118 and MSC 110, providing a gateway to PSTN 112.

When the mobile device 102 is initially powered on, it registers with the cellular network 104 or the wireless local area network 114 . "Registration" refers to the process by which the mobile device 102 tells the MSC 110 to connect calls from the PSTN 112 over a particular network. The decision to register in a network may vary depending on the specific application and overall design constraints. For example, the mobile device 102 can be configured to register with the wireless local area network 114 if the quality of service is acceptable. By routing all calls to mobile device 102 over WLAN 114, valuable cellular bandwidth is freed up for other mobile users. The quality of service of the wireless local area network 114 may be determined by the mobile device 102 based on local measurements and information from the server 120 . If the quality of service of the WLAN 114 cannot be maintained at an acceptable level, the mobile device 102 will register with the cellular network 104 . In mobile devices without cellular capabilities, local measurements and information from the server 120 can be used to determine whether the mobile device 102 should register with the wireless local area network 114 or remain on standby until the quality of service becomes acceptable.

The registration process begins when the mobile device 102 attempts to access the WLAN 114 when it is powered on for the first time. Mobile device 102 may employ any suitable access procedure. For example, mobile device 102 may employ a passive access procedure in which mobile device 102 searches for beacon signals from access point 116 . A beacon signal is a periodic signal transmitted by the access point 116 with synchronization information. The mobile device 102 may also employ an active access procedure in which the mobile device 102 transmits a probe signal and waits for a response from the access point 116 .

The mobile device 102 attempts to access the cellular network 104 when the mobile device 102 cannot access the WLAN, which may be the case when the mobile device 102 is powered on while in location A. Mobile device 102 can access cellular network 104 by acquiring a pilot signal from BTS 108. Once the mobile device 102 has acquired the pilot signal, a radio connection can be established between the two by means well known in the art. Mobile device 102 may register with MSC 110 using a radio connection.

In the depicted embodiment, mobile device 102 begins to detect beacon signals from access point 116 as it moves from location A to location B over cellular network 104 . Once the mobile device 102 detects the beacon signal, a radio connection can be established between the two by means well known in the art. The mobile device 102 then obtains the IP address of the server 120 . The mobile device 102 can use the services of a domain name server (DNS) to determine the IP address of the server. The domain name of the server 120 can be communicated to the mobile device 120 via the cellular network 104 . Using this IP address, the mobile device 102 can establish a network connection with the server 120 . The term "network connection" refers not only to the network layer connection between the mobile device 102 and the server 120, but also to the lower layer connections required to support the network connection, including physical layer connections. Once a network connection is established, information from the server 120 can be used together with local measurements to determine whether to renew its registration in the MSC 110 to continue future calls via the WLAN 114.

2 is a functional block diagram illustrating one example of a mobile device capable of supporting cellular and wireless local area network communications. The mobile device 102 may include a cellular transceiver 202 and a wireless local area network transceiver 204 . In at least one embodiment of the mobile device 102, the cellular transceiver 202 is capable of supporting CDMA2000 1x communication with a BTS (not shown), and the wireless LAN transceiver 204 is capable of supporting communication with an access point (not shown). ) IEEE802.11 communication. However, those skilled in the art will appreciate that the concepts described in connection with mobile device 102 may be extended to other cellular or wireless local area network technologies. Each transceiver 202, 204 is shown with a separate antenna 206, 207, but the transceivers 202, 204 could also share a single broadband antenna. Each antenna 206, 207 may include one or more radiating elements.

The mobile device 102 shown in the figure also has a processor 208 connected to the cellular transceiver 202 and the wireless local area network transceiver 204, but in other embodiments of the mobile device 102 different processors may be used for each transceiver. processor. Processor 208 may be implemented in hardware, firmware, software, or any combination thereof. For example, processor 208 may include a microprocessor (not shown). This microprocessor can be used to support a software application that (1) controls and manages access to cellular and wireless local area networks, and (2) interfaces processor 208 with keypad 210, The display 212 is connected with other user interfaces (not shown in the figure). Processor 208 may also include a digital signal processor (DSP) (not shown) with embedded software layers to support various signal processing functions such as convolutional coding, modulation, and spread spectrum processing. The DSP can also implement a vocoder function to support telephony applications. The manner in which processor 208 is implemented depends on the particular application and overall design constraints placed on the system. Those skilled in the art will recognize the interchangeability between hardware, firmware, and software configurations in these cases, and how best to implement the functionality described herein for a particular application.

Processor 208 may be configured to execute a selection algorithm. This selection algorithm can be used to determine whether the mobile device 102 should register with the cellular network or with the wireless local area network. This selection algorithm can be implemented using one or more software applications supported by the microprocessor-based architecture discussed above. This selection algorithm can also be implemented by hardware, software, firmware or any combination thereof, independent of a single module of the processor 208 . Depending on specific design constraints, the selection algorithm may be integrated in any entity in the mobile device 102, or distributed among multiple entities in the mobile device 102.

The criteria used to select an algorithm may vary from implementation to implementation. As mentioned above, this criterion may include local measurements of the mobile device, as well as information provided by the server. Referring to Figure 1, these local measurements may include various quality metrics indicative of the quality of the network connection. For example, the mobile device 102 may measure the strength of the transmitted signal from the access point 116 . In telephony applications, latency, jitter, and packet loss measurements can be used as additional quality metrics that correlate positively with network connections. “Forward” refers to transmissions on the network connection from the server 120 to the mobile device 102 , and “reverse” refers to transmissions on the network connection from the mobile device 102 to the server 120 . The information provided by the server 120 may include data indicating the load on the access point 116, historical information related to the performance of the access point 116, quality metrics such as delay, jitter, and packet loss in the reverse direction, or Any other information concerning the quality of the network connection.

Referring to FIGS. 1 and 2 , signal strength from an access point may be measured at the mobile device 102 using a received signal strength indication (RSSI) block 216 . The RSSI is most likely an off-the-shelf signal that is fed back to the WLAN transceiver 202 for automatic gain control, so it can be provided to the processor 208 without adding circuit complexity to the mobile device 102 . Additionally, the quality of the radio connection can also be determined from beacon signals. Since the beacon signal is an a priori known spread spectrum signal, a copy of the beacon signal may be stored in a memory (not shown) in the mobile device 102 . The demodulated beacon signal, together with a copy of the beacon signal stored in memory, can be used to estimate the energy of the transmitted beacon signal by means well known in the art.

Selection algorithms can also be used to compute various quality metrics that are positively related to network connections. As explained earlier, one of these quality measures is the latency in the forward direction through the network connection. In telephony applications, excessive latency can lead to poor quality due to unwanted echoes or overlapping of sounds. The selection algorithm may be configured to measure delay by any suitable means. In at least one embodiment of the wireless communication system, date and time stamps may be used with beacon signals and control signals transmitted by server 120 to measure delays across network connections. Specifically, when a forward transmission is received by mobile device 102, the time stamp may be extracted in processor 208 and compared to a local internal clock (not shown) in mobile device 102. This result, representing the delay going through the network connection, can be stored in memory (not shown). This selection algorithm may determine whether to register with the WLAN 114 using the most recent transmitted delay value stored in memory, or the average delay of multiple delay values.

Utilizing time stamps to measure latency across network connections requires that the local clock be synchronized with the server 120 . A remote time source (not shown) may be used to synchronize mobile device 102 and server 120 . The remote time source may be one of countless servers in IP network 118 that are synchronized to Coordinated Universal Time (UTC) by radio, satellite, modem, or other means. A remote time source may be used to provide time information, update or synchronize the internal clock in the mobile device 102 . This can be accomplished using a software program called Network Time Protocol (NTP). Network Time Protocol is an Internet standard protocol for synchronizing clocks to a time reference. Network Time Protocol may run in processor 208 or in mobile device 102 .

Delay-related issues in telephony applications are compounded by the need to remove jitter. Jitter is the variation in packet delay due to network congestion, time drift, or routing changes. Dejittering requires buffering of arriving packets so that all packets can be played back consecutively in the correct order. The processing of buffered packets adds additional latency. As such, the above algorithm can be further configured to measure jitter in the forward direction through the network connection as an additional quality metric. In the case of an adaptive jitter buffer that automatically adapts to changes in network delay, the delay measured by the selection algorithm may include network jitter, depending on where in the processing path it is measured. In a fixed jitter buffer that introduces a fixed delay to packets, the selection algorithm can determine network jitter measured from changes in delay values stored in memory. The selection algorithm may decide whether to use the worst-case variation in delay values, use the average variation in delay values, or use any other suitable calculation method for registering in WLAN 114 .

Lost packets can be problematic in telephony applications. Because IP networks do not guarantee quality of service, they often lose packets. In the IP network, the voice data packet is also treated as data. As a result, when the IP network is heavily congested, voice data packets will be discarded like ordinary data packets. However, unlike normal data packets, lost voice packets cannot simply be retransmitted at a later time. A selection algorithm may also be used to compute a quality metric related to lost packets by any suitable means. For example, beacon signals and control signals transmitted from server 120 may include serial numbers in addition to time and date tags. When a forward transmission is received by mobile device 102, the sequence number may be extracted in processor 208 for use by the selection algorithm. Based on this sequence number, the selection algorithm is able to determine which packets were lost.

In addition to the quality metrics described herein, the selection algorithm can utilize information from the server 120 to decide whether to register with the wireless local area network 114 . This information may relate to access point 116 loading, as previously described. Although WLAN 114 utilizes broadband to support communications, overhead also limits the number of mobile users that access point 116 can support. Additionally, the presence of other mobile users in the vicinity of the wireless local area network 114 can place additional burden on the access point 116 . Server 120 may be configured to maintain a database of all mobile subscribers that have registered with WLAN 114 through access point 116 . When a new mobile device 102 establishes a network connection, the server 120 can access this database to determine how many mobile users currently registered with the WLAN 114 are using the access point 116 . This information may be provided to a selection algorithm in mobile device 102 via a network connection. A selection algorithm can use this information to decide whether to register with the wireless local area network 114 .

The information provided by the server 120 to the mobile device 102 may also include historical information about the access point 116 . For example, server 120 may monitor the number of calls dropped by access point 116 by means known in the art. This information can be stored in a database at the server and transmitted to the mobile device 102 once a network connection is established. A selection algorithm in the mobile device 102 can use this information to help it assess the load at the access point 116 . If the probability of the access point 116 dropping the call is high, the selection algorithm may decide to register with the WLAN 114 only when the access point is lightly loaded. Conversely, if the probability of dropping the call is low, the selection algorithm can take a more aggressive approach and decide to register with the WLAN 114 even if the access point 116 is heavily loaded.

Server 120 may also be used to compute various quality metrics related to network connection inversion. These quality metrics can include latency, jitter, lost packets, and any other parameter that describes the quality of a network connection. Server 120 may calculate these quality metrics in the same manner as previously described for the selection algorithm, or by any other suitable means. Where delay or jitter is calculated using date and time stamps and control signals transmitted by the mobile device 102 over the network connection, the server 120 may utilize the Network Time Protocol to synchronize its internal clock. The sequence number embedded in the control signal by the mobile device 102 may also be used by the server 120 to identify lost packets. These quality metrics may be used by selection algorithms in the mobile device 102 . These quality metrics can be used in conjunction with quality metrics measured by selection algorithms to provide a complete picture of the forward and reverse of the network connection.

3 is a flow diagram illustrating the functionality of a selection algorithm in a mobile device. This selection algorithm begins, in step 302, as soon as a network connection is established between the mobile device and the server. The selection algorithm remains idle until information is received from the server in step 304 . In this example, this information indicates the load on the access point. In step 306, the selection algorithm determines whether the load of the access point exceeds a threshold. If the selection algorithm determines that the load on the access point exceeds the threshold, then in step 308 the registration procedure with the WLAN is terminated. Where the mobile device has both cellular and WLAN capabilities, the mobile device registers with the cellular network. In the case where the mobile device only has WLAN capability, the mobile device remains idle until the load on the access point drops. Thresholds can be generated in the mobile device or provided to the mobile device from a server over a network connection. In both cases, the threshold can be adjusted based on historical information stored in the server's database.

Assuming the mobile unit determines that the load on the access point does not exceed the threshold, the registration procedure continues. In step 310, the selection algorithm measures various quality metrics related to the network connection forward. In step 312, the selection algorithm also receives information from the server. Information from the server may include various quality metrics related to network connection inversion. In step 314, the selection algorithm evaluates these quality metrics. If the quality metric indicates that the quality of service is unacceptable, the selection algorithm ends the registration procedure in step 316 . After the registration procedure is complete, the operation of the mobile device again depends on the type of device being used. Conversely, if the quality metrics indicate that the quality of service is acceptable, the selection algorithm completes the registration process in the WLAN in step 318 .

The various illustrative logic blocks, modules, circuits, elements, and/or assemblies in the embodiments disclosed herein can be implemented using general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gates Arrays (FPGAs) or other programmable logic components, discrete gate or transistor logic, discrete hardware components, or any combination of the foregoing designed to perform the functions described herein. A general-purpose processor may be a microprocessor, however, the processor may also be a conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing components, such as a combination of a DSP and a microprocessor, a combination of multiple microprocessors, a combination of one or more microprocessors in conjunction with a DSP core, or any other combination of such configurations .

The methods or algorithms described in conjunction with the embodiments disclosed herein may be directly implemented by hardware, software modules executed by a processor, or a combination of both. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or various other storage media well known in the art. A storage medium can be coupled to the processor such that the processor can read information from, and write information to, the processor. A storage medium may also be integrated in the processor.

The preceding description has been presented to enable those skilled in the art to practice the various embodiments described herein. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles presented here may be applied to other embodiments. As such, these claims are not intended to limit the embodiments presented herein, but are consistent with the scope of the claims where reference to an element in the singular does not mean "one or only one", but rather "one or more", Unless otherwise specified. The structures and equivalent functions of the components of the various embodiments described in the specification that are known or later known to those skilled in the art are explicitly incorporated as references and covered by the claims. Furthermore, nothing disclosed herein is made available to the public regardless of whether it is explicitly recited in the claims. No claim component can be construed as falling within the sixth paragraph of 35 U.S.C. §112 unless the entire assembly is expressly stated as a "module for" or in a method claim as "Steps for".

Claims (30)

1. mobile communications device comprises:

Processor, be configured to network in server set up network and be connected; And

Transceiver, being configured to provides the information of receiving from described server to described processor, and this information connects relevant with described network;

Wherein said processor also is configured to determine whether to register in described network based on described information.

2. mobile communications device as claimed in claim 1, wherein said transceiver also is configured to set up dedicated radio link with access point, supporting described network to connect, and the information received from described server of wherein said transceiver comprises the information on load of described access point.

3. mobile communications device as claimed in claim 2, the information that wherein said transceiver is received from described server comprise the historical information relevant with described access point.

4. mobile communications device as claimed in claim 1, the information that wherein said transceiver is received from described server comprise and the relevant quality metric of described network connection.

5. mobile communications device as claimed in claim 4, wherein said quality metric is relevant with delay, shake or data-bag lost on described network connects oppositely.

6. mobile communications device as claimed in claim 1, wherein said processor also is configured to measure at least one in described network connection delay, shake or the data-bag lost forward, and, determine whether in described network, to register based on the information of receiving from described server and described at least one measurement.

7. mobile communications device as claimed in claim 1, wherein said transceiver also is configured to set up dedicated radio link with the access point of described network, and wherein said processor also is configured to measure the signal strength signal intensity from the wireless transmission of described access point, and, determine whether in described network, to register based on information of receiving from described server and the signal strength signal intensity that measures.

8. mobile communications device as claimed in claim 1 also comprises second transceiver, and if wherein said processor also be configured to determine in described network, not register, just in second network, register by described second transceiver.

9. mobile communications device as claimed in claim 8, wherein said transceiver comprises IEEE 802.11 transceivers, and described second transceiver comprises cellular transceiver, if and wherein said processor also is configured to determine and will register, just use described network support cellular service in described network.

10. mobile communications device comprises:

Processor, be configured to network in server set up network and be connected, and measure at least one in described network connection delay, shake or the data-bag lost forward, and wherein said processor is configured to also determine whether to register based on described at least one measurement in described network.

11. mobile communications device as claimed in claim 10, also comprise transceiver, this transceiver is configured to provide the information of receiving from described server to described processor, this information connects relevant with described network, and wherein said processor also is configured to determine whether to register in described network based on described at least one measurement and this information.

12. mobile communications device as claimed in claim 11, wherein said transceiver also is configured to set up dedicated radio link with an access point, supporting described network to connect, and the information received from described server of wherein said transceiver comprises the information on load of this access point.

13. mobile communications device as claimed in claim 12, the information that wherein said transceiver is received from described server comprise the historical information relevant with described access point.

14. comprising with described network, mobile communications device as claimed in claim 12, the information that wherein said transceiver is received from described server connect relevant quality metric.

15. mobile communications device as claimed in claim 14, wherein said quality metric is relevant with delay, shake or data-bag lost on described network connects oppositely.

16. mobile communications device as claimed in claim 10, wherein said transceiver also is configured to set up dedicated radio link with the access point of described network, and wherein said processor also is configured to measure the signal strength signal intensity from the wireless transmission of described access point, and, determine whether in described network, to register based on described at least one measurement and the signal strength signal intensity that measures.

17. mobile communications device as claimed in claim 10 also comprises second transceiver, and if wherein said processor also be configured to determine in described network, not register, just in second network, register by this second transceiver.

18. mobile communications device as claimed in claim 17, wherein said transceiver comprises IEEE 802.11 transceivers, and described second transceiver comprises cellular transceiver, if and wherein said processor also is configured to determine to register in described network, just use described network to come the supporting cellular service.

19. a method that communicates from mobile communications device and network comprises:

Setting up network with the server in the network is connected;

Receive and the relevant information of described network connection from described server; And

Determine whether in described network, to register based on described information.

20. method as claimed in claim 19 also comprises with access point and sets up dedicated radio link, connect to support described network, and the information received from described server of wherein said processor comprises the information on load of described access point.

21. comprising with described network, method as claimed in claim 19, the wherein said information of receiving connect relevant quality metric.

22. method as claimed in claim 19, comprise that also measuring described network connects in forward delay, shake or the data-bag lost at least one, and determine whether that wherein in described network registration is to be based upon on the information received from described server and described at least one based measurement.

23. method as claimed in claim 19, wherein said network comprise IEEE 802.11 networks, described method also is included in the described network and registers, and provides the cellular service on described network connects.

24. a method that communicates from mobile communications device and network comprises:

Setting up network with the server in the network is connected;

Measure at least one in described network connection delay, shake or the data-bag lost forward; And

Determine whether in described network, to register based on described at least one measurement.

25. method as claimed in claim 24 also comprises from described server receiving and the relevant information of described network connection, and determines whether that wherein registration is to be based upon on the basis of described at least one measurement and this information in described network.

26. method as claimed in claim 25 also comprises with the access point of described network and set up dedicated radio link, and the wherein said information of receiving comprises the information on load of this access point.

27. comprising with described network, mobile communications device as claimed in claim 25, the information that wherein said processor is received from described server connect relevant quality metric.

28. method as claimed in claim 24, wherein said network comprise IEEE 802.11 networks, described method also is included in the described network and registers, and provides the cellular service on described network connects.

29. a mobile communications device comprises:

Be used for setting up the module that network is connected with the server of network;

Be used for receiving the module that connects relevant information with described network from described server; And

Be used for determining whether the module registered at described network based on described information.

30. a mobile communications device comprises:

Be used for setting up the module that network is connected with the server of network;

Be used for measuring at least one the module that described network connects forward delay, shake or data-bag lost; And

Be used for determining whether the module registered at described network based on described at least one measurement.

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