WO2014059816A1

WO2014059816A1 - Communication method, system and multimode terminal

Info

Publication number: WO2014059816A1
Application number: PCT/CN2013/081176
Authority: WO
Inventors: 张金玺; 朱晓明; 莫知伟
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-10-17
Filing date: 2013-08-09
Publication date: 2014-04-24
Also published as: RU2015116655A; RU2646865C2; CN103781052A

Abstract

Disclosed are a communication method, system and multimode terminal. The method comprises: establishing a connection between a terminal supporting a first mode and a base station in a second mode via a multimode terminal, wherein the multimode terminal defines a radio SDR based on software and supports the first mode and the second mode; and the terminal supporting the first mode communicates with the base station in the second mode via the multimode terminal and the connection. By means of an SDR-based multimode terminal, the present invention can achieve the communication between one or more terminals and a base station (the terminal and the base station support different modes), solve the problem of communication between a terminal and a base station which are in different modes, for example, can achieve communication between one or more WLAN terminals and an LTE base station. Moreover, the multimode terminal is achieved based on the SDR, the area of the multimode terminal is reduced, and the hardware resource overhead is reduced, thereby reducing the cost for communication between a terminal and a base station which are in different modes.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a communication method, system, and multimode terminal. BACKGROUND With the development of wireless communication, Long Term Evolution (LTE), as a quasi-4G mainstream communication technology, is the mainstream of future communication. However, wireless communication networks such as 2G, 3G, and Wireless Local Area Network (WLAN) will not disappear and exit the market immediately, and they will coexist for a long time. The rapid development of wireless communication technology has led to the trend of network isomerization. Various emerging wireless technologies provide users with a ubiquitous and heterogeneous network environment, including wireless personal area networks (such as Zigbee, Bluetooth Bluetooth) and wireless LAN. (such as Wireless Fidelity (WiFi)), wireless metropolitan area network (such as Worldwide Interoperability for Microwave Access (WiMAX)), wireless mobile wide area network (such as 2G, 3G), satellite Network, as well as Ad Hoc networks, wireless sensor networks, etc., terminal technology is bound to move towards a multi-modal, intelligent trend to meet the requirements of users roaming and making full use of various heterogeneous network resources, and the terminal has cognitive ability ( Cognitive Radio), which supports reconfigurable Dynamic Spectrum Access, and the gradual evolution of access in heterogeneous wireless network environments is a trend. In the future wireless communication, operators will inevitably adopt LTE to ensure their coverage, and application scenarios of using 3G, WLAN, etc. to divert data services will become more and more common. This also requires the terminal to have multiple modes of access in many applications. In the related art, a single-mode terminal and a base station of different standards cannot directly communicate with each other. For example, a WLAN terminal and an LTE base station cannot directly communicate with each other, and the single-mode terminal can communicate with the base station through a multi-mode terminal, but existing The multimode terminal is bulky and costly. SUMMARY OF THE INVENTION Embodiments of the present invention provide a communication method, a system, and a multimode terminal, so as to at least solve the related art, a single mode terminal of different standards and a base station cannot directly communicate, and a single mode terminal can be implemented through a multimode terminal. Communication with a base station, but existing multimode terminals are generally bulky and costly. According to an aspect of the embodiments of the present invention, a communication method is provided, including: establishing, by a multimode terminal, a connection between a terminal supporting a first mode and a second base station, wherein the multimode terminal is based on a software definition radio (Software Definition) Radio, abbreviated as SDR), and supports the first system and the second system; the terminal supporting the first system communicates with the second system base station through the multimode terminal and the connection. Preferably, establishing, by the multimode terminal, the connection between the terminal supporting the first mode and the second standard base station comprises: establishing a connection between the multimode terminal and the second standard base station; and switching the multimode terminal from the second mode to the first mode; The mode terminal monitors the authentication request from the terminal supporting the first system in the first mode, and establishes a connection between the terminal supporting the first system and the second standard base station in response to the authentication request. Preferably, the terminal supporting the first mode communicates with the second standard base station through the multimode terminal and the connection includes: when the multimode terminal operates in the first mode, the data from the second standard base station is sent according to the protocol requirement of the first standard For the terminal supporting the first mode; when the multimode terminal operates in the second mode, the data from the terminal supporting the first system is transmitted to the second base station according to the protocol requirement of the second standard. Preferably, when a plurality of terminals supporting the first system simultaneously communicate with the second-standard base station, when the multi-mode terminal operates in the first mode, the data from the second-standard base station is sent to the support according to the protocol requirements of the first-standard system. The terminal of the first mode includes: when the multimode terminal works in the first mode, according to the protocol requirements of the first standard and the identifiers of the terminals supporting the first standard, the data from the second standard base station is separately sent to each support first. Standard terminal. Preferably, before the terminal supporting the first mode communicates with the second standard base station by using the multimode terminal and the connection, the method further includes: the multimode terminal receiving the request from the terminal supporting the first standard in the first mode, And when the multimode terminal is in the second mode, the request is forwarded to the second standard base station according to the protocol requirement of the second system, wherein the request is for requesting transmission of data or voice communication. Preferably, the soft handover of the multimode terminal from the second mode to the first mode comprises: the multimode terminal is softly switched from the second mode to the first mode by the baseband chip of the multimode terminal. Preferably, after the terminal supporting the first mode communicates with the second standard base station through the multimode terminal and the connection, the method further includes: when the multimode terminal works in the first mode, receiving the terminal from the terminal supporting the first mode The connection announcement is released, and the connection between the terminal supporting the first standard and the second base station is released according to the notification. According to another aspect of the present invention, a multimode terminal is provided, including: an establishing module, configured to establish a connection between a terminal supporting a first standard and a second standard base station, where the multimode terminal is based on an SDR, and Supporting the first system and the second system; the communication module is configured to communicate with the terminal supporting the first system and the second base station through the connection. Preferably, the establishing module comprises: a first establishing unit configured to establish a connection with the second standard base station; a switching unit configured to softly switch from the second mode to the first mode; and a second establishing unit set to be in the first mode The authentication request from the terminal supporting the first system is monitored, and the connection between the terminal supporting the first system and the second standard base station is established in response to the authentication request. Preferably, the communication module includes: a first sending unit, configured to: when the multimode terminal operates in the first mode, send data from the second standard base station to the terminal supporting the first standard according to the protocol requirement of the first standard; The second sending unit is configured to, when the multimode terminal operates in the second mode, transmit data from the terminal supporting the first system to the second standard base station according to the protocol requirement of the second standard. According to still another aspect of the embodiments of the present invention, a communication system is provided, including: a terminal supporting a first mode, a multimode terminal, and a second mode base station, wherein the multimode terminal is a multimode terminal of any of the foregoing The terminal supporting the first system includes: an establishing module, configured to establish a connection between the terminal supporting the first standard and the second standard base station through the multimode terminal; the communication module is configured to pass through the multimode terminal and connect with the second standard base station Communicate. In the embodiment of the present invention, the SDR-based multi-mode terminal can implement communication between one or more terminals and the base station (the terminal and the base station support different systems), and solve the communication problem between the terminal and the base station in different standards, for example, can be implemented. Communication between one or more WLAN terminals and an LTE base station. Moreover, the multimode terminal is implemented based on SDR, which reduces the area realized by the multimode terminal and reduces the hardware resource overhead, thereby reducing the cost of communication between the terminal and the base station in different standards. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a flowchart of a communication method according to an embodiment of the present invention; FIG. 2 is a structural block diagram of a multimode terminal according to an embodiment of the present invention; and FIG. 3 is a structural block diagram of a communication system according to an embodiment of the present invention. 4 is a schematic diagram of a communication method of an SDR multimode terminal according to a preferred embodiment of the present invention; and FIG. 5 is a schematic structural diagram of an SDR multimode terminal baseband chip according to a preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. The embodiment of the present invention provides a communication method. FIG. 1 is a flowchart of a communication method according to an embodiment of the present invention. As shown in FIG. 1, the following steps S102 to S104 are included. Step S102: Establish, by the multimode terminal, a connection between the terminal supporting the first standard and the second standard base station, where the multimode terminal is based on the SDR, and supports the first system and the second system. Step S104: The terminal supporting the first mode communicates with the second standard base station through the multimode terminal and the connection. In the related art, a single mode terminal of different standards and a base station cannot communicate directly, and a single mode terminal can communicate with a base station through a multimode terminal, but the existing multimode terminal is generally bulky and costly. In the embodiment of the present invention, the SDR-based multi-mode terminal can implement communication between one or more terminals and the base station (the terminal and the base station support different systems), and solve the communication problem between the terminal and the base station in different standards, for example, Communication between one or more WLAN terminals and an LTE base station can be achieved. Moreover, the multimode terminal is implemented based on SDR, which reduces the area realized by the multimode terminal and reduces the hardware resource overhead, thereby reducing the cost of communication between the terminal and the base station in different standards. In a preferred embodiment, step S102 includes: establishing a connection between the multimode terminal and the second standard base station; soft handover of the multimode terminal from the second mode to the first mode; monitoring the first mode of the multimode terminal from the first support The authentication request of the terminal of the system, in response to the authentication request, establishes a connection between the terminal supporting the first system and the second-standard base station. So far, the connection between the terminal supporting the first system and the second-standard base station is established by the SDR-based multi-mode terminal, that is, the connection between the terminal of different systems and the base station is established. The above SDR-based multimode terminal can support different standards. When the multimode terminal works in a certain system (current system), the data received in another system can be converted and transmitted according to the current standard, thereby realizing Communication between terminals of different standards and base stations. Specifically, the step S104 includes: when the multimode terminal works in the first mode, the data from the second standard base station is sent to the terminal supporting the first standard according to the protocol requirement of the first standard; when the multimode terminal works in the second mode And transmitting data from the terminal supporting the first system to the second standard base station according to the protocol requirement of the second standard. The terminal that communicates with the base station (different from the system supported by the base station) may be one or more. When multiple terminals supporting the first standard simultaneously communicate with the second standard base station, when the multimode terminal operates in the first mode Transmitting data from the second-standard base station to the terminal package supporting the first standard according to the protocol of the first standard When the multi-mode terminal works in the first mode, the data from the second-standard base station is separately sent to each terminal supporting the first-standard system according to the protocol requirements of the first-standard system and the identifiers of the terminals supporting the first-standard system. In the preferred embodiment, by identifying different terminals, it is ensured that data is transmitted to each terminal accurately and quickly. In a preferred embodiment, before the step S104, the method further includes: the multimode terminal receiving the request from the terminal supporting the first system in the first mode, and when the multimode terminal is in the second mode, according to the The two-standard protocol requires that the request be forwarded to the second-standard base station, where the request is for requesting transmission of data or voice communication. In the preferred embodiment, by sending a request to trigger communication, the unnecessary resource waste can be avoided. Preferably, the soft handover of the multimode terminal from the second mode to the first mode comprises: the multimode terminal is softly switched from the second mode to the first mode by the baseband chip of the multimode terminal. The baseband chip mainly implements soft handover and communication of the system through the SDR data signal processing chip therein. In a preferred embodiment, after the terminal supporting the first mode communicates with the second standard base station through the multimode terminal and the connection, the method further includes: the multimode terminal operates at the first In the system, the disconnection announcement from the terminal supporting the first system is received, and the connection between the terminal supporting the first standard and the second base station is released according to the notification. This will unlink in time and free up resources. The embodiment of the invention further provides a multimode terminal, which can be configured to implement the above communication method. 2 is a structural block diagram of a multimode terminal according to an embodiment of the present invention. As shown in FIG. 2, the multimode terminal includes an establishing module 22 and a communication module 24. The structure is described in detail below. The establishing module 22 is configured to establish a connection between the terminal supporting the first system and the second standard base station, wherein the multimode terminal is based on the SDR and supports the first system and the second system; the communication module 24 is connected to the establishing module 22 And being configured to communicate with the terminal supporting the first system and the second base station through the connection. Preferably, the establishing module 22 includes: a first establishing unit, configured to establish a connection with the second standard base station; a switching unit connected to the first establishing unit, configured to softly switch from the second mode to the first mode; and the second establishing unit And connecting to the switching unit, configured to monitor an authentication request from the terminal supporting the first system in the first mode, and establish a connection between the terminal supporting the first system and the second standard base station in response to the authentication request. Preferably, the communication module 24 includes: a first sending unit, configured to: when the multimode terminal operates in the first mode, send data from the second standard base station to the terminal supporting the first standard according to the protocol requirement of the first standard; The second sending unit is configured to, when the multi-mode terminal operates in the second mode, transmit data from the terminal supporting the first system to the second-standard base station according to the protocol requirement of the second system. Preferably, when a plurality of terminals supporting the first system simultaneously communicate with the second standard base station, the first sending unit is further configured to: when the multimode terminal operates in the first mode, according to the protocol requirements of the first system and Each of the identifiers supporting the first-standard terminal transmits data from the second-standard base station to each terminal supporting the first-standard system. The device further includes: a first receiving module, connected to the establishing module 22, configured to receive a request from the terminal supporting the first system in the first mode; a forwarding module connected to the receiving module, configured to be in the multimode terminal In the second mode, the request is forwarded to the second standard base station according to the protocol requirement of the second system, wherein the request is for requesting transmission of data or voice communication. In the foregoing embodiment, the terminal different from the base station system can establish a communication link with the base station through the SDR multi-mode terminal, and implement the wireless Internet access function or the voice communication function on the terminal side. For example, a WLAN terminal (laptop or mobile phone) can implement a wireless Internet access function or a voice communication function on the WLAN terminal side through an SDR multimode terminal and a communication link with the LTE base station. Preferably, the switching unit is further configured to softly switch from the second mode to the first mode through the baseband chip of the multimode terminal. Preferably, the apparatus further includes: a second receiving module, configured to: when the multimode terminal operates in the first mode, receive an unlinking announcement from the terminal supporting the first mode; and release the module, and set to release the support according to the notification A connection between a standard terminal and a second standard base station. The embodiment of the invention further provides a communication system, which can be configured to implement the above communication method. 3 is a block diagram showing the structure of a communication system according to an embodiment of the present invention. As shown in FIG. 3, the communication system includes a terminal 32 supporting a first system, a multimode terminal 34, and a second base station 36. The structure is described in detail below. The multimode terminal 34 is a multimode terminal of any one of the above embodiments; the terminal 32 supporting the first system includes: an establishing module 322, configured to establish, between the terminal supporting the first standard and the second base station, by the multimode terminal The communication module 324 is coupled to the setup module 322 and configured to communicate with the second base station via the connection established by the multimode terminal and the setup module 322. It should be noted that the multi-mode terminal and the communication system described in the device embodiment correspond to the foregoing method embodiments, and the specific implementation process has been described in detail in the method embodiment, and details are not described herein again. As can be seen from the above description, the SDR multimode terminal in the foregoing embodiment can access the base station to implement basic communication functions on the one hand; on the other hand, through different conversion interfaces of the SDR multimode terminal, different systems can be implemented. The protocol conversion enables multi-level communication between terminals to achieve the purpose of communication between other terminals and the base station. For example, an SDR multimode terminal supporting WLAN and LTE can access a base station through an LTE system to implement a basic communication function. The LTE system and the WLAN system can also implement a conversion interface between the LTE and the WLAN through the SDR multimode terminal. Protocol conversion, thereby achieving multi-level communication between terminals, and achieving the purpose of communication between other WLAN terminals and LTE base stations. Of course, in other cases, the SDR multimode terminal can also be used to implement communication between the terminal and the base station. In order to make the technical solutions and implementation methods of the present invention clearer, the implementation process will be described in detail below in conjunction with the preferred embodiments. In the following preferred embodiment, the WLAN terminal communicates with the LTE base station through an SDR-based multimode terminal (LTE & WLAN) as an example. 4 is a schematic diagram of a communication method of an SDR multimode terminal according to a preferred embodiment of the present invention. In the preferred embodiment, the SDR-based multimode terminal can support the LTE system and the WLAN system. Since different WLAN terminals are to implement different functions, as shown in FIG. 4, the above communication method is divided into two parts, one part is WLAN terminals 41, 42 and 44 (for example, a notebook computer) through the SDR multimode terminal 43 (for example, The modulo data card) and 46 (for example, a multimode mobile phone), the communication link with the LTE base station 47, implements the wireless Internet access function of the WLAN terminals 41, 42 and 44; the other part is the WLAN terminal 45 (for example, a multimode mobile phone). The voice communication function of the WLAN terminal 45 is realized by a communication link with the LTE base station 47 by the SDR multimode terminal 46 (for example, a multimode mobile phone). The first part (the implementation of the wireless Internet access function) is as follows: Step 1: The SDR multimode terminals 43 and 46 (operating in the LTE mode) establish a connection with the LTE base station 47 by cell search, random access, and the like. Step 2: After the SDR multimode terminals 43 and 46 remain connected to the LTE base station 47, when no listening service is performed in the LTE working mode, the baseband chip of the SDR multimode terminal (LTE&WLAN) is softly switched to the WLAN mode to monitor the WLAN. The link ensures that the LTE link communicates with the WLAN link normally. Step 3: The WLAN terminals 41, 42 and 44 initiate a WLAN authentication request to the SDR multimode terminals 43 and 46. The SDR multimode terminals 43 and 46 monitor the authentication request in the WLAN mode, and respond to the authentication request, and the authentication is successfully established. Step 4: The WLAN terminals 41, 42 and 44 initiate data requests to the SDR multimode terminals 43 and 46. After the SDR multimode terminals 43 and 46 monitor the data request of the WLAN terminal in the WLAN mode, they respectively receive the WLAN terminals 41, 42 and The data request of 44 extracts the baseband data of the data request. When the SDR multimode terminals 43 and 46 operate in the LTE mode, a data request is initiated to the LTE base station 47 according to the LTE protocol. Step 5: The LTE base station 47 establishes a data path with the SDR multimode terminals 43 and 46 by interacting with the SDR multimode terminals 43 and 46 operating in the LTE mode in response to the data request. Step 6: When the SDR multimode terminals 43 and 46 are working in the WLAN mode, the data sent by the LTE base station 47 is sent to the WLAN terminals 41 and 42 according to the WLAN protocol requirements according to different identification codes of the WLAN terminals 41, 42 and 44. And 44; when the SDR multimode terminals 43 and 46 are operating in the LTE mode, the data transmitted by the WLAN terminals 41, 42 and 44 is transmitted to the LTE base station 47 as required by the LTE protocol, thereby implementing the WLAN terminals 41, 42 and 44 and the LTE base station. 47 data communication. Step 7: The WLAN terminals 41, 42 and 44 send an unlink notification to the SDR multimode terminals 43 and 46,

The SDR multimode terminals 43 and 46 receive an announcement and disconnect when operating in the WLAN mode. The second part (implementing the voice communication function) has the following steps: Step 1, Step 2 and Step 3 and Step 1, Step 2 and Step 3 of the first part are not repeated here. Step 4: The WLAN terminal 45 initiates a voice request to the SDR multimode terminal 46. After monitoring the voice request of the WLAN terminal 45 in the WLAN mode, the SDR multimode terminal 46 accepts the voice request initiated by the WLAN terminal 45 to extract the baseband data of the voice request. When the SDR multimode terminal 46 operates in the LTE mode, a voice request is initiated to the LTE base station 47 according to the requirements of the LTE protocol. Step 5: The LTE base station 47 responds to the voice request and establishes a voice link by interacting with the SDR multimode terminal 46 operating in the LTE mode. Step 6: When the SDR multimode terminal 46 is working in the WLAN mode, the voice data sent by the LTE base station 47 is sent to the WLAN terminal 45 according to the WLAN protocol requirement; when the SDR multimode terminal 46 is operating in the LTE mode, the WLAN terminal 45 is used. The transmitted voice data is sent to the LTE base station 47 as required by the LTE protocol, thereby implementing voice communication between the WLAN terminal 45 and the LTE base station 47. Step 7: The WLAN terminal 45 sends a disconnection announcement to the SDR multimode terminal 46, and the SDR multimode terminal 46 receives the announcement and disconnects when operating in the WLAN mode, while interrupting the voice communication with the LTE base station 47. 5 is a schematic structural diagram of an SDR multimode terminal baseband chip according to a preferred embodiment of the present invention. In the preferred embodiment, an SDR multimode terminal supporting LTE standard and WLAN standard is taken as an example to describe the structure of a baseband chip. Multimode for LTE and WLAN. As shown in FIG. 5, the LTE/WLAN terminal baseband chip 50 in the SDR multimode terminal includes: SDR-DSP 502, ARM (Advanced RISC Machines, The RISC is an abbreviation of Reduced Instruction Set Computer 504 and an accelerator 506. The SDR-DSP 502, the digital signal processing (DSP) chip, defines a programming language, and implements data processing of the physical layer in the LTE mode and the WLAN mode by using the programming language. Outside the codec) and control within 1ms.

The ARM 504 is mainly used for processing LTE and WLAN protocols, running some physical layer processes, controlling DSP and radio frequency (RF). The accelerator 506 performs the function of decoding the soft value to obtain the function of the determined binary code stream and the function of encoding the transmission signal. It should be noted that the steps shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and, although the logical order is shown in the flowchart, in some cases, The steps shown or described may be performed in an order different than that herein. In summary, the communication method, system, and multimode terminal provided by the foregoing embodiments of the present invention can implement communication between one or more terminals and a base station through an SDR-based multimode terminal (the terminal and the base station support different systems). The communication problem between the terminal and the base station of different standards is solved, for example, communication between one or more WLAN terminals and the LTE base station can be implemented. Moreover, the multimode terminal is implemented based on SDR, which reduces the area realized by the multimode terminal and reduces the hardware resource overhead, thereby reducing the cost of communication between the terminal and the base station in different standards. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. A communication method, comprising:

Establishing, by the multimode terminal, a connection between the terminal supporting the first system and the second standard base station, wherein the multimode terminal is based on a software defined radio SDR, and supports the first system and the second system;

The terminal supporting the first mode communicates with the second standard base station through the multimode terminal and the connection.

2. The method according to claim 1, wherein establishing a connection between the terminal supporting the first system and the second standard base station through the multimode terminal comprises

The multimode terminal establishes a connection with the second standard base station;

The multimode terminal is softly switched from the second mode to the first mode;

The multimode terminal monitors an authentication request from the terminal supporting the first system in the first mode, and establishes the connection between the terminal supporting the first standard and the second base station in response to the authentication request. Connection.

The method according to claim 1, wherein the communication between the terminal supporting the first mode and the second base station by using the multimode terminal and the connection comprises:

When the multimode terminal operates in the first mode, the data from the second standard base station is sent to the terminal supporting the first standard according to the protocol of the first standard;

When the multimode terminal operates in the second mode, the data from the terminal supporting the first system is transmitted to the second standard base station according to the protocol of the second system.

The method according to claim 3, wherein, when a plurality of terminals supporting the first mode simultaneously communicate with the second standard base station, when the multimode terminal operates in the first mode, according to the method The first-standard protocol requires that data from the second-standard base station be sent to the terminal supporting the first-standard system, including:

When the multimode terminal operates in the first mode, the data from the second standard base station is separately sent to each of the second standard base stations according to the protocol requirements of the first standard and the identifiers of the terminals supporting the first standard. Supports the terminal of the first standard. The method according to claim 1, wherein, before the terminal supporting the first mode communicates with the second base station by using the multimode terminal and the connection, the method further includes:

The multimode terminal receives a request from the terminal supporting the first system in the first mode, and according to the protocol requirement of the second system when the multimode terminal is in the second mode Forwarding the request to the second standard base station, wherein the request is for requesting transmission of data or voice communication. The method according to claim 2, wherein the soft handover of the multimode terminal from the second mode to the first mode comprises: the multimode terminal passing the baseband chip of the multimode terminal from the The two-system soft switch to the first system. The method according to any one of claims 1 to 6, wherein after the terminal supporting the first system communicates with the second base station through the multimode terminal and the connection, the method Also includes:

When the multimode terminal operates in the first mode, receiving an unlinking announcement from the terminal supporting the first system, and releasing the terminal supporting the first system and the second system according to the notification The connection between the base stations. A multimode terminal, comprising:

Establishing a module, configured to establish a connection between the terminal supporting the first system and the second standard base station, wherein the multimode terminal is based on a software defined radio SDR, and supports the first system and the second system;

And a communication module configured to communicate with the terminal supporting the first system and the second base station through the connection. The multimode terminal according to claim 8, wherein the establishing module comprises:

a first establishing unit, configured to establish a connection with the second standard base station; and a switching unit configured to softly switch from the second mode to the first mode;

a second establishing unit, configured to monitor, in the first mode, an authentication request from the terminal supporting the first system, and in response to the authentication request, establish the terminal supporting the first mode and the second base station The connection between the two. The multimode terminal according to claim 8, wherein the communication module comprises: a first sending unit, configured to: when the multimode terminal operates in the first mode, send data from the second standard base station to the first standard support according to a protocol requirement of the first standard terminal;

a second sending unit, configured to: when the multimode terminal operates in the second mode, send data from the terminal supporting the first system to the second standard according to a protocol requirement of the second standard Base station.

A communication system, comprising: a terminal supporting a first mode, a multimode terminal, and a second mode base station, wherein the multimode terminal is the multimode terminal according to any one of claims 8 to 10;

The terminal supporting the first system includes:

Establishing a module, configured to establish, by the multimode terminal, a connection between the terminal supporting the first standard and the second standard base station;

And a communication module configured to communicate with the second base station via the multimode terminal and the connection.