Wireless communication components for facilitating multiple network type compatibility

Wireless communication components that help multiple network compatibility

This creation is related to a kind of network communication, the compatibility of different types of networks, or technologies that meet different standards. Moreover, this creation is related to a kind of communication that facilitates the handover of communication from one network to another. The method that will adversely affect the service is related to the device. In particular, this creation is aimed at wireless transmitting/receiving units (hereinafter referred to as WTRUs) that can be used in more than one network at the same time. One of these networks is a wireless network, such as those that comply with one of the IEEE 802 family standards. The wireless local area network (hereinafter referred to as WLAN) is either a unit system conforming to the third-generation partnership program or related standards.

The wireless communication system is now a well-known technology. Generally, such a system includes multiple communication stations for transmitting and receiving wireless communication signals between the multiple communication stations. According to the type of the system, typical communication stations are usually two types of wireless devices, one of which is a base station (hereinafter referred to as BS), and the other is a wireless transmit/receive unit (WTRU) at the user end, such as a mobile phone.

The term "base station" used here includes, but is not limited to, a base station, access point (hereinafter referred to as AP), Node B, address controller, or other interface devices in a wireless environment, where the wireless environment Provide other wireless transmit/receive units (WTRU) to wirelessly access the network connected to the base station.

The term "wireless transmit/receive unit (WTRU)" as used herein includes, but is not limited to, a user equipment, a mobile station, a fixed or mobile subscriber unit, a pager, or anything that can operate in a wireless environment In other types of devices. Such wireless transmitting/receiving units (WTRUs) include personal communication devices, such as telephones, video phones, and Internet phones with network connections. In addition, the wireless transmit/receive units (WTRUs) further include portable personal computer devices, such as portable personal digital assistants with wireless modems (modems) to perform similar network capabilities (PDA) and notebook computers. The wireless transmit/receive units (WTRUs) with portability or other ability to change location are generally regarded as mobile units.

Generally speaking, a network composed of base stations has the ability to enable each base station to manage simultaneous communications with multiple appropriately configured wireless transmit/receive units (WTRUs) and multiple appropriately configured base stations. Some wireless transmit/receive units (WTRUs) may alternatively be configured to manage the wireless communication directly connected between two wireless transmit/receive units (WTRUs), that is to say, they do not need to be directly managed through a base station network relay. Such a method is usually called wireless communication of point-to-point communication. In such a communication mode, a wireless transmit/receive unit (WTRU) is configured to directly communicate with other wireless transmit/receive units (WTRUs), and it also acts as or has the function of a base station. The wireless transmit/receive units (WTRUs) can be configured to be used in multiple networks, and have the ability to communicate with the multiple networks and point-to-point communication.

A certain type of wireless system is called a wireless local area network (WLAN). The wireless local area network system can be configured to manage and equip wireless local area network (WLAN) modems (modems). Transmit/receive units (WTRUs) perform wireless communication, and can also manage peer-to-peer wireless communications with wireless transmit/receive units (WTRUs) of the same configuration. At present, the wireless local area network (WLAN) modems have been integrated into many traditional communication systems and computer devices by many manufacturers. For example, mobile phones, personal digital assistants, and laptop computers are equipped with one or more wireless local area network (WLAN) modems (modems).

In the description of wireless mobile phones, one of the most widely used standards is called the Global System of Mobile Telecommunications (hereinafter referred to as GSM). This standard is also considered or referred to as the second-generation mobile radio system standard (hereinafter referred to as 2G), and an updated version of the standard (2.5G) has been developed since then. General Packet Radio Service (GPRS) and Global System for Mobile Telecommunications Communications (GSM) Evolved Enhanced Data Technology (EDGE) are both 2.5G technologies, compared to the second-generation (2G) global system of mobile telecommunications communications (GSM) network, these 2.5G technologies provide relatively high-speed data services. Once the aforementioned standards have additional features and improvements, each technology of these standards will also seek new evolution. In January 1998, the European Telecommunications Standards Institute-Special Operations Group (ETSI SMG) agreed to a wireless access plan for the third-generation general radio system, which is also called the overall mobile telecommunications system (hereinafter referred to as UMTS). ). In order to further implement the overall mobile telecommunications system (UMTS), a third-generation partnership project (hereinafter referred to as 3GPP) was established in December 1998. The Third Generation Partnership Project (3GPP) continues to implement a shared third-generation mobile radio standard. In addition to the standards of the Third Generation Partnership Project (3GPP), the Third Generation Partnership Project 2 (3GPP2) has also developed a standard for using mobile IP in a core network for mobile devices.

A commonly used wireless local area network (WLAN) environment with one or more wireless local area network (WLAN) base stations (commonly referred to as access points (APs)) is established according to the IEEE 802 family of standards. User certification procedures are usually required to access these networks. The protocols of such systems are currently standardized in the technical field of wireless local area networks (WLAN), such as complying with the framework of the protocols provided by the IEEE 802 family of standards.

A basic service set (hereinafter referred to as BSS) is an infrastructure block in an IEEE 802.11 wireless local area network (WLAN), where the wireless local area network (WLAN) includes and is also regarded as a station (hereinafter referred to as STAs) wireless transmit/receive units (WTRUs). Basically, these can<img file="TWM294170U_D0001.tif" />The connected stations (STAs) can form a basic service group (BSS). Multiple basic service groups (BSSs) are connected to each other through an architectural element called a distribution system (hereinafter referred to as DS) to form an external service group (ESS). An access point (AP) is a wireless transmit/receive unit (WTRU) that provides access to the distribution system (DS) by providing a distribution system (DS) service, and usually allows multiple access points at the same time. Each station (STAs) accesses the distribution system (DS).

In a wireless local area network (WLAN) based on an access point (AP), a wireless transmit/receive unit (WTRU) must communicate wirelessly with a specific access point (AP) located around it . The wireless transmit/receive unit (WTRU) is considered to be connected to this access point (AP). Sometimes for a wireless transmit/receive unit (WTRU) it is necessary or desirable to change the access point (AP) it was originally connected to, which means to reconnect, for example, the wireless transmit/receive The unit (WTRU) may experience poor signal connection because it moves outside the area covered by the access point (AP) to which it was originally connected. Poor signal connection may also be due to congestion in the basic service set (BSS) served by the access point (AP).

A wireless transmit/receive unit (WTRU) can use a wireless local area network (WLAN) to establish a communication session with a wireless network server through a connected access point (AP), and through the Internet Communicate and obtain a unique Internet protocol (hereinafter referred to as IP) URL. usually<img file="TWM294170U_D0002.tif" />This type of communication requires the establishment of pointing information, which allows the wireless transmit/receive unit (WTRU) to transmit information to the Internet and receive information uploaded from the Internet to its Internet protocol URL. When the wireless transmit/receive unit (WTRU) reconnects to a new access point (AP), maintaining the communication session requires a mechanism to transfer the session to the new access point (AP) and update the S pointing to information.

A wireless transmit/receive unit (WTRU) can also be configured to communicate with two or more different types of networks. Such a device is called a multi-mode wireless transmit/receive unit (WTRU). For example, a wireless transmit/receive unit (WTRU) can be configured to communicate with three different types of networks, such as an 802.11 (WiFi) network, a 803.16 (WiMAX) network, and a mobile phone network. Multi-mode wireless transmit/receive units (WTRUs) can be configured to independently operate in the operating mode required in each type of network. For example, a multi-mode wireless transmit/receive unit (WTRU) has been disclosed in US Publication No. 20040248615 published on December 9, 2004, and the applicant of this case is also the application of this case people.

In an independent multi-mode operation, the wireless transmit/receive unit (WTRU) can manage communication operations with one or more different communication standards, but only in this environment with a specific network of the same type Handed over. In order to avoid additional functionality and complexity, an effective<img file="TWM294170U_D0003.tif" />The transfer mechanism allows a multi-mode wireless transmit/receive unit (WTRU) to transfer from a communication type of a network station using a communication standard to another communication type of a network station using a different communication standard.

This creation provides a method, system, and components that allow a wireless transmit/receive unit (WTRU) to communicate with a base station (original BS) through a first communication standard, so as to be handed over to other BSs (target BS), and through A second communication standard to communicate with it without loss of performance.

The terms of base station (BS) and wireless transmit/receive unit (WTRU) will be used in the following description. This project provides a wireless radio access environment, which utilizes more network standards through wireless network services, and the wireless network services may include the Internet provided by the wireless transmit/receive unit (WTRU) )access. This case is particularly useful when it is associated with a mobile multimode wireless transmit/receive unit (WTRU), that is, it passes through individual geographic areas covered by the services provided by individual base stations. However, the benefit of this case may lie in the understanding of the wireless transmit/receive unit (WTRU) that the wireless transmit/receive unit (WTRU) may be constant during a specific communication period, which is the quality of service in any communication (below Any form of degradation can be achieved by switching to a different form of the network, and the wireless transmit/receive unit (WTRU) is configured to operate to provide better QoS for its communications. For communication requirements, the wireless transmit/receive unit (WTRU) is better<img file="TWM294170U_D0004.tif" />Integrate or install a wireless device, which is like a cellular and/or IEEE 802 standard compatible device, but you can also directly use the wireless communication performance with switching function when connecting.

The term frame used here includes but is not limited to packets, blocks, frames, and cells. A frame is a bundle of data that is sent from one device to another in a specific way. The main elements of a frame are generally header, payload, and trailer. The header includes synchronization, initial, destination, and length information. The payload includes the data sent, and the tail is Including the end of the packet, error detection and error correction mechanism. The term "protocol" used here is defined as specifications and procedures regarding frame format and signal timing, so that devices can communicate with each other. A protocol stack is a series or a group of related protocols designed to work together.

Please refer to Figure 1 to reveal a wireless communication environment in which a wireless transmit/receive unit (WTRU) guides wireless communication via a website base station, and the network base station in this example belongs to the access point of a wireless local area network (WLAN) AP. The access point AP is connected with other network infrastructures of a wireless local area network (WLAN), such as an access controller (hereinafter referred to as AC). The access point AP shown in the figure is to guide communication with five wireless transmit/receive units (WTRU), and the communication is coordinated and synchronized through the access point AP. Such a configuration can also be referred to as a basic service set (BSS) in the wireless local area network (WLAN) content.

Please refer to Figure 2, which shows a wireless local area network (WLAN) with two access points AP, which represent the original access point AP and the target access point AP respectively. Its wireless transmit/receive unit (WTRU) is shown to guide wireless communication through the original access point AP, and the wireless transmit/receive unit (WTRU) is configured to provide the original access point AP and the target access point Therefore, if the wireless transmit/receive unit (WTRU) transmits to the target access point AP and out of the range of the original access point AP or for other reasons, the wireless transmit/receive unit (WTRU) can "handover" the communication from the original AP to the target AP. This form of intra-network handover is customarily provided by standards developed in various types of network systems. However, the intranet handover of communication in various types of networks is usually uncertain.

The current technological mobility between each other, especially for mobile IP, is based on application software/layer 3 solutions. However, the handover is relatively low and prone to data loss. As mentioned in the above detailed description, this case provides a novel trigger processing layer, that is, layer 2.5, which focuses on inter-network communication, which directly communicates with the lower physical and intermediate access control layer (L1). Coupling with L2), and steps to accelerate the triggering of the lower layers of technological mobility between each other.

Please refer to Figure 3, which shows that a multi-mode wireless transmit/receive unit (WTRU) can<img file="TWM294170U_D0005.tif" />Communication is carried out by multiple network types. The wireless transmit/receive unit (WTRU) moves from an area served by a cellular base station to an area served by a wireless local area network (WLAN) access point (AP). And an inter-network communication handover will terminate the old connection with the BS and establish a new connection with the access point AP.

In addition, this case reveals two different paths through which wireless transmit/receive unit (WTRU) communication will continue on the network side. One of the paths is such as voice or other data, and it can be transmitted with the core network of the cellular system such as the 3GPP system. The other path is data communication through the Internet, which can be Voice-over IP (VoIP) or other data transmission over an IP network. In some examples, the wireless transmit/receive unit (WTRU) Internet session is preferably maintained in the cellular controller as a mobile IP home agent (Mobile IP Home Agent), where the wireless transmit/receive unit (WTRU) IP packets are designated to be forwarded to the relevant Mobile IP Foreign Agent (Mobile IP Foreign Agent) in the Network Access Controller (AC) through the Mobile IP tunnel, and the AC then uses the newly established connection with the access point AP. Transmit IP packets to the wireless transmit/receive unit (WTRU).

According to the technology in this case, the communication handover of related services between networks is performed on different nodes through the implementation of a new protocol layer called Layer 2.5 (L2.5) in at least the wireless local area network (WLAN) protocol components. Preferably, the access controller is configured to execute the L2.5 protocol to handle service-related mobility on the network side, and the multi-mode wireless transmit/receive unit (WTRU) is configured to execute the L2 The .5 protocol handles service-related mobility on the user side and L2.5 communication with the network AC. Preferably, the access point is configured to implement the L2.5 protocol and communicate lower-level information from the wireless transmit/receive unit (WTRU) to the access controller AC or the implementation is at the access point AP Separate from AC. In addition, the functions described here with regard to the new protocol layer (L2.5) can be implemented in different ways, such as a management plane outside the normal layer or in some other form.

Please refer to Figure 4, which shows a handover structure and service for the 12.5 protocol in a multi-mode wireless transmit/receive unit (WTRU) and a wireless local area network network component (WLAN AP/AC) A preferred implementation. The wireless transmit/receive unit (WTRU) is equipped with a radio transceiver, which completes the communication protocol for wireless local area network (WLAN) communication through "n" stacked components. Each stacked component includes a wireless local area network (WLAN) physical layer (L1) and a wireless local area network media access control layer (hereinafter referred to as WLAN MAC) (L2). The completion of the wireless local area network media access control The layer (WLAN MAC) and a logical link control (hereinafter referred to as LLC) interface with a layer of 2.5 components. The network component of the wireless local area network (WLAN) is equipped with a radio transceiver, which completes the communication protocol for wireless local area network (WLAN) communication through "n" stacking components. Each stacked component includes a wireless local area network (WLAN) physical layer (L1) and a wireless local area network media access control layer (WLAN MAC) (L2). The completion of the wireless local area network media access control layer ( WLAN MAC) and a logical link control (LLC) interface with a layer of 2.5 components. Handover may occur between any "n" different network types. Each network type has its own media access control layer (hereinafter referred to as MAC) and physical layer (hereinafter referred to as PHY).

The completion of layer 2.5 provides an Internet work determining component. In order to communicate with a wireless transmitting/receiving unit (WTRU), the Internet work determining component is set based on different types of received signals to identify different networks that can be used to complete wireless communication, and it is set to complete the communication used A change in the choice of signal type. Preferably, three service types are provided to support the handover between different network types, namely: indication service, network notification and discovery service, and mobile service.

Indicating service The service is like the traditional physical (PHY) layer, the underlying media access control (MAC) layer (L1 and L2 respectively) relying on technology, and the traditional upper layer, such as an abstraction layer between a mobile Internet protocol (IP) . Preferably, the function of L2.5 indicating service completion includes: 1. Set to the trigger of L2.5 mobile service, which is based on the triggers from L1 and L2 (such as on-chain, off-chain, etc.) to generate A handover decision; 2. Set to L3 (such as mobile Internet Protocol (IP)) and higher layers, such as: session initiation protocol trigger, which is transmitted on the interface of L3 signal and application signal; and 3. The triggers set to L1 and L2 are transmitted on the interface between the physical (PHY) layer and the media access control (MAC) layer.

The trigger sent to higher layers can simply be an indication of wireless media conditions. Or they can provide smarter instructions to higher layers, such as giving specific instructions (such as switching from link 1 to link 2). This assumes that network discovery and mobile services can make a handover decision on their own, and notify higher layers of this change.

The better network notification and discovery services include: management discovery and network selection. Preferably, a list of neighboring networks is maintained with the possibilities of each network (such as QoS and link conditions). Through L2.5 information transmission, multi-mode wireless transmit/receive units (WTRUs) can transmit these information to a wireless local area network (WLAN), or can be used to operate, manage, and maintain (OA &amp; M) functions. Share these messages. Preferably, the network announcement and discovery service interacts with the mobile service to transmit necessary information to the mobile service so that an appropriate handover decision can be made.

The mobile service is preferably an inter-802 (inter-802) mobile service, a cellular-wireless local area network (WLAN) mobile service, or a mobile service including the above two. However, any type of network-wireless local area network mobile service can be provided to facilitate the handover to or form a wireless local area network (WLAN) or any other type of limited or wireless network. The wireless network Comes with a special multi-mode wireless transmit/receive unit (WTRU), which is set up to communicate. Inter-802 (inter-802) 12.5 mobile services preferably include managing the handover of a wireless transmit/receive unit (WTRU) from an 802.xx network to an 802.yy network using different communication standards, where the 802.xx network Road and 802.yy networks are different standards in the IEEE802 family of standards.

Floor<img file="TWM294170U_D0006.tif" />The completion of the mobile service in .5 is preferably used to communicate through a management interface. Preferably, the management interface is configured to use the communication protocol in the base station (hereinafter referred to as IAPP), the control and provision of wireless access points (hereinafter referred to as CAPWAP) or other similar protocols. Preferably, the mobile service is responsible for secure content delivery, pre-authentication, and setting this specific mobile service component to serve, and has other confirmation functions regarding network-type Internet handover. In particular, in an IEEE802.11 network, the intra-base station communication protocol (IAPP) and the control and provision of wireless access points (CAPWAP) are used for mobile use. In this case, the movement of L2.5 is not limited between technologies (such as wireless local area network to cellular), but it is also applied to the communication protocol (IP ) Subnet moves.

Preferably, the mobile service is set to generate a communication handover decision from one network type to another network type. Preferably, based on the desired degree of QoS and/or communication link conditions, such as including, link condition changes and pre-link termination, user preferences or other factors, such decisions are made to set the mobile server components . For a communication, it can pass through either of the two networks with a desired QoS, and the continuation can be based on factors such as the cost of the service, relative network congestion, or any other desired parameters. Make a handover decision. Preferably, mobile services are technologically agnostic, that is, they are set up to not be dictated by the physical requirements of a particular network, which are set by the components that are set up to complete L1 and L2 to communicate through such a network. propose.

Preferably, the cell-wireless local area network (WLAN) mobile service includes managing cell-wireless local area network (WLAN) handover. Depending on the type of coupling between the cell and the wireless local area network (WLAN), these services preferably cover the cell network for the 802.xx technology. Preferably, such a mobile service is provided with an interface that is the same as or similar to the traditional Iub or Iur interface, in terms of connectivity and functionality. In such mobile services, the unitized neighbor list can be shared through the OA&amp;Me function. Preferably, security and mobility management is completed in a wireless local area network access gateway.

Please refer to Figure 5, which is an example architecture diagram of a wireless local area network (WLAN) network station. The network station is preferably structured to be able to communicate with other Aps and Agc through a mutual access protocol, such as IAPP, CAPWAP or other similar protocols. The station shown has IAPP+ (IAPP with extension) and or CAPWAP+ (CAPWAP with extension) interfaces to communicate with other WLAN APs and ACs. With this structure, neighboring forms can be obtained in different ways. For example, IAPP+ can send the proximity form to L2.5, and L2.5 to the station. In addition, wireless transmit/receive units (WTRUs) can report proximity lists to L2.5, and L. can be sent to other nodes via IAPP+. It is best to provide an OA&amp;M agent to store neighboring forms. With this structure, L2.5 can make a switch decision, and then can execute the switch decision through IAPP, CAPWAP+ or other similar protocols.

Figure 6 presents a schematic diagram of a multi-mode wireless transmit/receive unit (WTRU) unit-to-wireless local area network (WLAN) handover based on the technology of this case. The wireless transmit/receive unit (WTRU) is provided with a transceiver that performs cell-based network communication through unit stacking elements, and performs wireless local area network (WLAN) communication through 802.XX stacking elements. The unit stack element includes a unitized physical layer (L), a unitized MAC layer (L2), a unit wireless link control (hereinafter referred to as RLC) layer, and a unit radio resource control (hereinafter referred to as RRC) to implement agreements. The 802.XX stacking element includes the above-mentioned L2.5, WLAN physical layer (1), WLAN MAC layer (L2) and WLAN logical link control (LLC). The interface element b connected between the RRC element of the cell stack and the L2.5 element of the 802.XX stack is used for signal transmission between the individual protocol stacks. The air wireless signal between the networks and the individual MAC and physical layers are formed and transmitted to each network. PRC is a radio resource control function in the GPP specification, a typical unit agreement construction function. Other equivalent functions can be used, including but not limited to GSM RR.

The initial state refers to the active communication connection between the multi-mode wireless transmit/receive unit (WTRU) and the cell network through stacking components. In this state, the paths labeled 1 and 2 show two alternative routes, and the layer 2.5 trigger may start to execute the cell 802 switching policy functional element stored in the cell network. In the signal transmission of path 1, a connection with a wireless local area network (WLAN) is established through 802.XX stacking components. The wireless transmit/receive unit (WTRU) sends layer 25 trigger information (such as measurement) to the WLAN network, where the information is propagated to the cell network via IP or some other common transfer mechanism between the two networks / Toggle policy function. Based on the received layer 2.5 trigger information, the cell network/handover policy function can use that information as part of the handover decision process, which will then trigger a handover that causes the interruption of the active communication connection (denoted by X). The communication Later it will be executed via WTRU/WLAN connection (not shown).

The signal transmission of path 1 can be implemented in a synchronous wireless mobile mode operation, in which the layer 2.5 function automatically sends the layer 2.5 trigger information to the WLAN network. For an asynchronous wireless mode operation, the unit stack is preferably constructed to periodically activate the layer 25 of the 802.XX stack so that the trigger information can be sent to the unit network through the path 1. In this case, the periodic excitation is delivered through the interface b between the RRC and L2.5 components.

The signal transmission of path 2 can be implemented in a synchronous wireless mobile mode operation, where the layer 2.5 function is automatically compiled through an application programming interface (hereinafter referred to as API) that spans the interface b between the RRC and each stacked L2.5 component And send the layer 2.5 trigger information to the stacked unit side. The API is a standard set of software interrupts, calls, and data formats used by the layer 25 to initiate contact with cell network services. The layer 25 information is then delivered to the cell network through the RRC signaling protocol. In the non-synchronized wireless mode of operation, the cell stack can be periodically activated to send layer 2.5 trigger information to the cell network through path 2. These situations are shown in Figure 6, where the periodic excitation is delivered through the interface b between the RRC and L2.5 components.

Level 2.5 information can be transmitted in various ways through path 2. For example, layer 25 information can be conveyed as a whole summary of the information sent in an RRC signal. In addition, the layer 25 information can be delivered as a partial overview of the information sent in an RRC signal. In the best case, layer 25 information can interact to form new RRC information or old RRC information. Just like sending a signal in path 1, based on the received layer 25 trigger information based on the cell network/switching policy function through path 2 to send the signal, the system may then use that information as the switching decision process and subsequent Inspire part of the switch.

Figure 7 is a schematic diagram of the multi-mode wireless transmit/receive unit (WTRU) in Figure 6 with a WALN initiating active communication, where the initiating active communication is followed by switching to a cell network. In this case, the communication is controlled by the 802 handover policy function of the wireless local area network (WLAN). The paths labeled 3 and 4 present two alternative routes that the layer 25 trigger may use to cause the 802 handover policy function in the wireless local area network (WLAN). When layer 2.5 sends a signal through path 3, the 802.XX stacked L2.5 components will communicate with the WLAN802 switching policy function through the active link. In the signal transmission of path 4, the connection with the unit network will be constructed by unit stacking components. The wireless transmit/receive unit (WTRU) sends layer 25 trigger information to the cell network, where the information is propagated to the wireless local area network (WLAN) through IP or some other common transfer mechanism between the two networks Switch the policy function with its 802. Based on the received layer 2.5 trigger information<img file="TWM294170U_D0007.tif" />The 802 handover policy function can use that information as part of the handover decision process, which will then trigger a handover that causes the interruption of the active communication connection (denoted by X), which will later be performed through the WTRU/WLAN connection (not shown).

In a simultaneous radio mode operation, the RRC device can independently transmit background RRC handover related information to the 802.xx stack L2.5 device via interface b, and the 802.xx stack L2.5 device passes the background RRC via path 3. The handover related information is forwarded to the wireless local area network (WLAN), where the background RRC handover related information can be transmitted to the cell network used to establish a cell/WTRU handover connection. Alternatively, the RRC component can independently transmit background RRC handover related information to the cell network via path 4 indicating that the communication is being controlled by the handover 802.xx WLAN layer 2.5.

If a handover decision or situation is determined in the wireless transmit/receive unit (WTRU), preferably, the WTRU 802.xx stacked L2.5 component will signal the 802 handover policy function of the aforementioned event. Preferably, the 802 handover policy function then makes a final decision about causing a handover to the cell network. If the decision is executed, the WLAN layer 2.5 will send a signal to the cell network. After handing over to the unit network, preferably, the subsequent handover behavior will be determined by the unit-802 handover policy function, as shown in the description of Figure 6.

Figure 8 shows an example of a wireless transmit/receive unit (WTRU) that operates in four different wireless network communication environments, namely: GSM, 3GPP, IEEE 802.11 and IEEE802. 16. The wireless transmit/receive unit (WTRU) of Figure 8 includes a transceiver 50 for implementing wireless signaling in each of the four networks. The transceiver 50 includes a GSM stack component for implementing a GSM physical layer (L1), a GSM MAC layer (L2), a GSM cell radio link control (RLC) layer and a GSM RR protocol. The transceiver includes a 3GPP stack component to implement a 3GPP physical layer (L1), a 3GGP MAC layer (L2), a 3GPP cell radio link control (RLC) layer, and a 3GGP RRC protocol. The transceiver 50 includes a WLAN 802.11 stack element for implementing the protocols of a WLAN 802.11 physical layer (L1), a WLAN 802.11 MAC layer (L2), and a WLAN 802.11 LLC. The transceiver 50 includes a WLAN 802.16 stack element for implementing a WLAN 802.16 physical layer (L1), a WLAN 802.16 MAC layer (L2), and a WLAN 802.16 LLC agreement. An interface element b'is provided to facilitate L2.5 signaling between the four stacked elements. An L2.5 device is implemented in the interface b'to replace an L2.5 device incorporated in one of the WLAN device stacks. The trigger forwarding of an active communication protocol stack is generated in the L2.5 component, so the trigger can be understood through a different network, and the different network is a candidate for handing over the active communication, so that it can come from The wireless transmit/receive unit (WTRU) can communicate from any network to any other network.

Figure 8 shows an example of the sending, in which a handover of an active WLAN 802.11 communication is performed to send to the GSM cell network. In this example, the pass<img file="TWM294170U_D0008.tif" />It is controlled by the 802 handover policy function of the 802.11 WLAN. Paths 5 and 6 show two alternative paths, and layer 2.5 triggers can lead to the 802 handover policy function element located in the 802.11 WLAN via these paths. The L2.5 signal on path 5 is sent, and the L2.5 component communicates with the WLAN 802 handover policy function on the active link via the 802.11 stack component. In route 6 signaling, a connection is established with the GSM cell network via the GSM cell stacking component. The WTRU 50 transmits layer 2.5 trigger information to the cell network, where the layer 2.5 trigger information is transmitted to the 802.11 WLAN and its 802 handover policy function via IP or some other common transmission device between the two networks. After receiving the layer 2.5 trigger information, the 802 handover policy function uses the information as part of a handover decision process, and then causes the handover, which leads to the disconnection of the active 802.11 WLAN communication connection (indicated by x) , And then the communication continues via a GSM unit/WTRU connection (not shown in the figure).

As shown by the dashed line, the wireless transmit/receive unit (WTRU) in FIG. 8 may also include a wired signal processing element W. Preferably, the wired signal processing component W is used to implement another network type protocol to process network communication signals received by the wireless transmit/receive unit (WTRU) via a wired connection, and selectively To establish a network signal to communicate via the wired connection. In this example, the interface element b'is used to facilitate L2.5 transmission to the wired signal processing element and the wired stack element, so as to enable a communication handover between a communication and a wireless communication, wherein the The wireless transmit/receive unit (WTRU) has a wired signal processing unit, even if the wireless transmit/receive unit (WTRU) has a single wireless operation mode, this creation is still applicable<img file="TWM294170U_D0009.tif" />。

Even though the features and elements of this case have been recorded in the preferred embodiment by a specific combination, each feature or element can be used alone (without other features and elements of the preferred embodiment), or with or without other features of the case Used in various combinations with components.

Preferably, the L2.5 component of Fig. 6-8 is implemented on a single integrated circuit, such as an application specific integrated circuit (ASIC), with the interface component and the implementation of a stack of individual network communication protocols. Multiple of this element. However, the device can also be easily implemented on multiple discrete integrated circuits.

The foregoing description of the specific wireless transmit/receive unit (WTRU) and network configuration is only an example, not a limitation. Other changes and modifications consistent with this creation will be understood by those who are familiar with this art

Even though the features and elements of this case have been recorded in the preferred embodiment by a specific combination, each feature or element can be used alone (without other features and elements of the preferred embodiment), or with or without other features of the case Used in various combinations with components.

<p>3GPPThe Third Generation Partnership Project</p><p>MACMedia Access Control</p><p>ACAccess Controller</p><p>OA&amp;MOperation management and maintenance</p><p>APAccess Point</p><p>PHYPhysical Media</p><p>BSBase Station</p><p>RLCWireless Link Control</p><p>BSSBasic Service Group</p><p>RRCRadio Resource Control</p><p>IAPPAgreement between access points</p><p>WLANWireless Local Area Network</p><p>IPInternet Protocol</p><p>WTRUWireless Transmit/Receive Unit</p><p>LLCLogical Link Control</p><p>CAPWAPControl and assign wireless access points</p><p>GSMGlobal System of Mobile Telecommunications Communications</p><p>GSM RRGlobal System for Mobile Communication Radio Resource Management</p>

Figure 1 shows a system outline diagram of a conventional wireless communication system in a wireless local area network (WLAN).

Figure 2 shows the conventional wireless local area network (WTRU) wireless communication from one access point (AP) to other access points (AP) in the same type of wireless local area network (WLAN). WLAN) handover scheme.

Figure 3 is a schematic diagram of the authoring system according to the present invention, which shows wireless communication from an Internet and cell network context to a wireless local area network (WLAN) with a wireless transmit/receive unit (WTRU).

Figure 4 shows the relationship between a multi-mode wireless transmit/receive unit (WTRU) and wireless local area network (WLAN) network components according to this creation.

Figure 5 shows a wireless local area network (WLAN) network station that interacts with the Internet and cell networks for management functions.

Figure 6 shows the flow of information in the handover from a cell network to a wireless local area network (WLAN) according to this creation.

Figure 7 shows the flow of information in the handover from a wireless local area network (WLAN) to a cellular network according to this creation.

Figure 8 shows another embodiment of the multi-mode wireless transmit/receive unit (WTRU) according to the present invention.