WO2015161494A1

WO2015161494A1 - A household system of a door entry system, the door entry system and an integrated indoor station

Info

Publication number: WO2015161494A1
Application number: PCT/CN2014/076172
Authority: WO
Inventors: Wei Fu; Wei HOU; Renfeng ZHOU
Original assignee: Abb Technology Ltd
Priority date: 2014-04-25
Filing date: 2014-04-25
Publication date: 2015-10-29
Also published as: CN105517654A; CN105517654B

Abstract

The present invention discloses a household system of a door entry system (DES) for supporting multiple indoor stations in one apartment. The household system comprises a router, a plurality of indoor stations, a gateway and an individual proxy server belonging to one apartment; whereinthe router is used for setting up the household network and connecting to all other devices of the apartment, including the server, the gateway and the indoor stations; the indoor stations are used by a user to answer the call; the gateway, one side of which is connected with the door entry network used for connecting all devices that exposed out of the apartment and the other side of which is connected with the household network through the router, and the DES devices out of the apartment are capable of communicating with multiple indoor stations through the gateway; the server, is configured to manage multiple indoor stations belonging to the apartment. Compared with the existing prior arts, the proposed solutions greatly improve usability, security and reliability.

Description

A HOUSEHOLD SYSTEM OF A DOOR ENTRY SYSTEM, THE DOOR ENTRY SYSTEM AND AN INTEGRATED

INDOOR STATION

FIELD OF THE INVENTION

[0001] Embodiments of the present disclosure generally relate to a door entry system (DES), and more particularly relate to a DES for supporting multiple indoor stations in one apartment, a household system of the DES and an integrated indoor station of the DES.

BACKGROUND OF THE INVENTION

[0002] Nowadays, door entry systems are very popular especially in residence buildings.The common configuration of DES is that one apartment only has one indoor station. However, more and more high/middle level customers want their apartmentsto have multiple indoor stations. Besides, mobile devices like smart phone, tablet, and etc. are becoming more and more prevailing in our daily life. Soit will be very beneficial if multiple indoor stations, including these mobile devices can be used in one apartment, !n addition, the security requirement of indoor stations has become more and more important as there are many extended private functions implemented into the mobile devices.

[0003] One existing solution of supporting multiple indoor stations in one apartmentcan be basically achieved through a SIP server. The whole DES has only one SIP server; and other devices (such as an outdoor station, a guard unit and all indoor stations) are registered to the SIP server. Regarding the apartment which has multiple indoor stations t will be assigned a unique ID and all indoor stations inside this apartmentwill use this unique ID register at the SIP server. If there is a call request to the apartment, the target ID is the assigned unique ID of this apartment, the SiP server will forward this call request to all indoor stations inside this apartment. However, this solution is involved in a lot of drawbacks such as poor reliability, poor security, unable to support mobile smart device and complicated wiring and hard expansion, as discussed below. [0004] Firstly, the system reliability is poor because too much works in the DES rely on one SIP Server. When the SIP server is under abnormal state, the whole system will be greatly impacted. Secondly, the system security is also poor. Because all indoor stations need to register at one SIP server, these indoors stations have to physically connect with the SIP server in one network. So it is unable to implement isolation among apartments. Some malicious users can illegally access the equipment in other apartments through the DES. Thirdly, smart phones can't access the DES as it's unable to provide wireless accessing point.ln addition, regarding the situation that multiple indoor stations in one apartment, each indoor station needsto be wired separately. So engineering installation and wiring are very complicated.

[0005] In view of the foregoing, there is a need in the art to develop an improvedDES to support multiple indoor stations in one apartment.

SUMMARY OF THE INVENTION

[0006] The object of the present invention is to provide a new solution for the DES to support multiple indoor stations in one apartment, so as to solve or at least partially mitigate at least a part of problems in the prior art,and to improve usability, security and reliability.

[0007] According to one aspect of the invention, there is provided a household system of a door entry system (DES) for supporting multiple indoor stations in one apartment.The household system comprises a router, a plurality of indoor stations, a gateway and an individual proxy server belonging to one apartment; whereinthe router is used for setting up the household network and connecting to all other devices of the apartment, including the server, the gateway and the indoor stations;the indoor stations are used by a user to answer the call;the gateway, one side of which is connected with the door entry network used for connecting all devices that exposed out of the apartment and the other side of which is connected with the household network through the router, and the DES devices out of the apartment are capable of communicating with multiple indoor stations through the gateway; the server, is configured to manage multiple indoor stations belonging to the apartment.

[0008] According to a preferred embodiment of the present invention, the gateway comprises two network interface cards and a firewall, one card being connected with the door entry network and the other card being connected with the household network, the firewall which discards all illegal data and only allows the specific data that sent to the specific port, the gateway being configured to isolate and bridge the two networks.

[0009] According to a preferred embodiment of the present invention, the server is capable of providing a function that supports multiple indoor stationsto display incoming video simultaneously if the indoor stations have the video display function.

[0010] According to a preferred embodiment of the present invention.the server and the gateway can be integrated into one device, named the gateway server, to manage multiple indoor stations, one side of the gateway server being connected with the door entry network and the other side of the gateway server being connected with the household network through the router, and the DES devices out of the apartment being capable of communicating with multiple indoor stations through the gateway server.

[0011] According to a preferred embodiment of the present invention, both the proxy server and the gateway can be integrated into an indoor station, called the main indoor station, to manage multiple indoor stations, one side of the main indoor station being connected with the door entry network and the other side of the main indoor station being connected with the household network through the router, and the DES devices out of the apartment being capable of communicating with multiple indoor stations through the main indoor station.

[0012] According to a preferred embodiment of the present invention.the DES can be a digital or an analog system.

[0013] According to a preferred embodiment of the present invention, if the DES is an analog system, the gateway further comprises a transform module, which is capable of transforming audio, video and protocol data between analog system and digital system.

[0014] According to a preferred embodiment of the present invention.the connection in the apartment can be wired or wireless connection.

[0015] According to a preferred embodiment of the present invention.the indoor station can be a mobile device or a fixed installed device.

[0016] According to a preferred embodiment of the present invention,the mobile device can be a smart phone, a Personal Digital Assistant (PDA), a tablet or a laptop.

[0017] According to a preferred embodiment of the present invention, the server comprises:a terminal registering unit, configured to register the indoor station in response to a register request from the indoor station;a proxy unit, configured to forward a call request from a caller to the registered indoor station;a channel manage unit, configured to create and/or maintain and/or delete a Real-time Transport Protocol (RTP) channel for a call; anda media forwarding unit, configured to forward the audio and/or video data from the caller to the registered indoor stations through the RTP channel.

[0018] According to a preferred embodiment of the present invention, the channel management unit, further configured to bind all registered indoor stations to the channel after receiving call response from them; unbind other devices after receiving off-hook request from the off-hook indoor station; and the proxy unit, further configured to send cancel request to other devices after receiving off-hook request from the off-hook indoor station.

[0019] According to another aspect of the invention, there is provideda door entry system (DES) for supporting multiple indoor stations in one apartment. The system comprises:an outdoor station, used by a caller to make a call; anda door entry network, used for connecting all devices that exposed out of the apartment; andthe household system.

[0020] According to another aspect of the invention, there is provided an integrated indoor station of a DES for supporting multiple indoor stations in one apartment. The integrated indoor station, which is configured to manage multiple indoor stations used by a user to answer the call, is integrated the function of an indoor station, a gateway and an individual proxy server into it and configured to make sure the DES devices out of the apartment can communicate with multiple indoor stations through the integrated indoor station, whereinone side of the integrated indoor station is connected with a door entry network used for connecting all devices that exposed out of the apartment;the other side of the integrated indoor station is connected with the household network through a router.

[0021] According to a preferred embodiment of the present invention, it further comprises two network interface cards and a firewall, one card being connected with the door entry network and the other card being connected with the household network, the firewall which discards all illegal data and only allows the specific data that sent to the specific port, the integrated indoor station being configured to isolate and bridge the two networks.

[0022] According to a preferred embodiment of the present invention.it is capable of providing a function that supports multiple indoor stations to display incoming video simultaneously if the indoor stations have the video display function.

[0023] According to a preferred embodiment of the present invention.the door entry network can be a digital or an analog network.

[0024] According to a preferred embodiment of the present invention, if the door entry network is an analog network, the integrated indoor station further comprises a transform module, which is capable of transforming audio, video and protocol data between the analog network and the digital network.

[0025] According to a preferred embodiment of the present invention.the connection in the apartment can be wired or wireless connection.

[0026] According to a preferred embodiment of the present invention.the indoor stations can be a mobile device or a fixed installed device.

[0027] According to a preferred embodiment of the present invention.the mobile device can be a smart phone, a PDA, a tablet or a laptop.

[0028] Compared with the existing prior arts, because every server in each apartment is independent and isolated, without any affection to each other, the solution of the present invention not onlyfulfil!sthe requirements that support multiple indoor stations in everyapartment, buta!so support the indoor devices accessing the door entry system safely and reliably, so as to improve the usability, security and the user experience. The solutioncan be achieved with a simple wiring, and it is easily for expansion with lowcost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other features of the present disclosure will become more apparent through detailed explanation on the embodiments as illustrated in the description with reference to the accompanying drawings, throughout which like reference numbers represent same or similar components and wherein:

[0030] Fig. 1 schematically illustrates a network topology of a DES in which the firstembodiment of the present disclosure can be implemented;

[0031] Fig.2schematically illustrates a network topology of a DES in which the second embodiment of the present disclosure can be implemented;

[0032] Fig.3schematically illustrates a network topology of a DES in which the third embodiment of the present disclosure can be implemented;

[0033] Fig. 4schematically illustrates a signaling diagram according to an embodiment of the present;

[0034] Fig. Sschematical!y illustrates a block diagram of a server according to an embodiment of the present disclosure.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0035] Hereinafter, solutions as provided the present disclosure will be described in details through embodiments with reference to the accompanying drawings. It should be appreciated that these embodiments are presented only to enable those skilled in the art to better understand and implement the present disclosure, not intended to limit the scope of the present disclosure in any manner.

[0036] Generally, ail terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise herein. All references to "a/an/the/said [element, device, component, means, step, etc]" are to be interpreted openly as referring to at least one instance of said element, device, component, means, unit, step, etc., without excluding a plurality of such devices, components, means, units, steps, etc., unless explicitly stated otherwise. Besides, the indefinite article "a/an" as used herein does not exclude a plurality of such steps, units, modules, devices, and objects, and etc. [0037] Next, reference will be made to Fig. 1 to describe an example network topoiogy ofan apartment in door entry system in which the first embodiment of the present disclosure can be implemented. As illustrated in Fig. 1 , a DES is supporting multiple indoor stations 150, 160 in one apartment 100. The door entry network 130 is used for connecting all devices thatexposed out of the apartment, eg. outdoor station, switch of the unit, etc.However, the mobile indoor stationconnected to the household network, even if it is located outside the apartmentlOO, does not belong to the door entry network 130, but is still one of the indoor stations. Belonging to one apartment 100, there are a router 140, a plurality of indoor stations 150, 160, a gateway 110 and an individual proxy server 120. The router 140 is configured to setup household network and all devices in apartment communicate through it. The indoor stations 150, 160areused by a user to answer the call. The gateway 110 is configured to isolate and bridge communications between door entry network and household network, one side of which is connected with the door entry network 130 and the other side is connected with the router 140. The server 120, which can also be called as household servermanage multiple indoor stations 150, 160 belonging to the apartment 100.

[0038] Because every server in each apartment is independent and isolated, without any affection to each other, thesolution not onlyfulfiilsthe requirements that support multiple indoor stations in every apartment, but also support the indoor devices accessing the DES safely and reliably, so as to improve the usability, security and the user experience. For example, there is no need for many indoor stations registering at one server to deal with huge data, so better isolation between different apartments and better reliability of the whole DES can be easily achieved. Furthermore, this solution also provides the possibility for the mobile indoor station to communicate with the server wire!essly. Besides, the security of the DES is much safer than only one server in the whole DES, and it's more difficult for the malicious users to illegally access the DES. Additionally, the solution for supporting multiple indoor stations in each apartmentcan be achieved with a simple wiring, and the reconstruct of the DES does not need to be done at the same time, so it can be expanded step by step with low cost.

[0039] In a preferred embodiment, in order to improve system security and achieve household isolation, each apartment can have a firewall structure.The gateway1 0has two network interface cards.One card is connected with the door entry network 130 and the other card is connected with the router. These two networks are physically isolated.The firewall in the gateway 110 is used to isolate and bridge the two networks. The firewall uses port filter and data filter to deal with the data crossing the networks. Only specific data which sending to specific port is allowed to forward to another network, others are all discarded. The household network hides behind the firewall. All illegal data from door entry network 130 to household network are discarded by firewall. Therefore, with the firewall features and two cards, the gateway can implement household isolation.

[0040] In addition, the server is capable of providing a function that support multiple indoor station display incoming video simultaneously if they have video display function, to fulfill the requirement of high/middle level customers.

[0041] Besides, this invention can further be easily applied at not only digital DES but also analog DES. The gateway further comprises a transform module, which is capable of transforming audio, video and protocol data between analog system and digital system.

[0042] In this network topology shown in Fig. 1 , some connections are wired connection and others are wireless connection. One example of wireless connection is through WiFi, or other wireless communication techno!ogy. Using the wireless router in household network, smart phones and tablets can easily access the DES after connected with the proxy server 120. However, it should be noted that it is also interchangeabiefor the wired or wireless connection.

[0043] As mentioned hereinbefore, the indoor station can be a mobile device 160 or a fixed installed device 150. The fixed installed indoor station 150 can be connected to server 120 through the router 140. The mobile indoor station 60, such as a smart phone, a PDA, a tablet or a laptop and so on, can also be connected to the server 120 via router 140. The mobile indoor station 160 can also be outside of the apartment 100 when it works. For example, for the mobile indoor station 160 like a smart phone, which is located inside the apartment 100 covered by WiFi signals from the router 140, it can be connected to the router 140 via for example WiFi. The mobile indoor station 160, which is located outside the apartment or an area that cannot receive WiFi signals from the router 140, can first access Internet through for example 3G/4G network, or other WiFi network and in turn, it can also be connected to the server 120 via router 140 which is connected to the Internet. [0044] In this network topology, the server 120 is a household server located inside the apartmentlOO; however, it is also possible to locate the server 120 at any other place near the apartment 100 or remote therefrom as long as the router 140 can be connected thereto.

[0045] Next, reference will be made to Fig. 2, which illustrates a DES according to the second embodiment of the present disclosure.

[0046] As illustrated, a DES is supporting multiple indoor stations 250, 260 in one apartment 200. The door entry network 230 is used for connecting all devices that exposed out of the apartment, eg outdoor station, switch of the unit, etc. Belonging to one apartment 200, there are a plurality of indoor stations 250, 260, and a router 240. The server and the gateway are integrated into one device, called the gateway server 270, to manage multiple indoor stations 250, 260 belonging to the apartment 200. One side of the gateway server 270 is connected with the door entry network 230 and the other side of the gateway server 270 is connected with the router 240. The indoor stations 250, 260 are connected to the router 240 and used by a user to answer the call. The outdoor station is capable of communicating with the indoor stations 250, 260 through the gateway server270. The router 240 is respectively connecting to the gateway server270, the indoor stations 250, 260. The router 240 enables the indoor stations 250, 260 to communicate with the gateway server 270.

[0047] As the server and the gateway are integrated into one device, the second embodiment is cost saving, and easier to wire than the first embodiment.

[0048] The device and the DES as provided in this embodiment of the present disclosure have been described with reference to Fig. 2. However, it may be also appreciated that all these devices, units, modules described herein havea variety of other forms as described hereinbefore with regarding to the first embodiment

[0049] Next, reference will be made to Fig. 3, which illustrates a DES according to the third embodiment of the present disclosure.

[0050] As illustrated, a DES is supporting multiple indoor stations 350, 360 in one apartment 300. The door entry network 330 is used for connecting all devices that exposed out of the apartment, eg .outdoor station, switch of the unit, etc. Belonging to one apartment 300, there are a plurality of indoor stations 350, 360, and a router 340. Both the server and the gateway are integrated into the main indoor station380, to manage multiple indoor stations 350, 360, 380 belonging to the apartment 300. One side of the main indoor station 380 is connected with the door entry network 330 and the other side of the main indoor station 380 is connected with the router 340. The indoor stations 350, 360 are connected to the router 340 and used by a user to answer the call. The outdoor station is capable of communicating with the indoor stations 350, 360, 380 through the main indoor stations 380. The router 340 is respectively connecting to the main indoor station380 and other indoor stations 350, 360. The router 340 enables the indoor stations 350, 360 to communicate with the main indoor station 380.

[0051] The advantage of the third embodiment is obvious. No need to re-wire every apartment separately. To achieve the similar function, thisimproved DES only needs to replace an indoor station with the developed indoor station, which has the gateway and proxy server integrated into it.Therefore this solutioncan be achieved with a simple wiring, and it is easily for expansion with low cost.

[0052] The device and the DES as provided in this embodiment of the present disclosure have been described with reference to Fig. 3. However, it may be also appreciated that all these devices, units, modules described herein have a variety of other forms as described hereinbefore with regarding to the first embodiment.

[0053] Hereinafter, to make the skilled in the art to understand the solution as provided in the present disclosure completely and thoroughly, reference will be made to Fig. 4 to explain a signaling diagram as provided in embodiments of the present disclosure.

[0054] As illustrated in Fig. 4, first, at Registeringstep, Device 1 and Device 2, both served as indoor stations, send register request to Server individually. Then Server sends register response to each client (Device 1 and Device 2) and maintains the register list.

[0055] Then,at Ringing step, Caller makes a point to point call to this apartment. The call request arrives at Server first. Server processes the call request and retrievals the register list. Then Server forwards the call request to each registered devices, Device 1 and Device 2, according to register list. Device 1 and Device 2 send call response to Server separately. Server processes the call response and createsa Rea!-time Transport Protocol (RTP) channel which used to deal with the audio and video data forwarding. Then Server binds Device 1 and Device 2 to this RTP channel and forwards call response to Caller.Caller processes call response, encodes and sends video data to Server. Server forwards the video data to Device 1 and Device 2 through RTP channel of this call. The whole system goes to ringing state.

[0056] Next, Talking step is discussed. For example, during ringing state, off-hook on Device 1. Then Device 1 sends off-hook request to Server. Server processes off-hook request and unbinds and removes the other un-off-hooks devices (Device 2) from RTP channel and sends cancel request to these devices (Device 2). Device 2 sends cancel response to Server and goes to idle state. Server forwards off-hook request to Caller. Then Server forwards the Caller's off-hook response to off-hook device (Device 1 ).Caller and Device 1 enter into talking state. Server forwards audio and video data between them through RTP channel.

[0057] During talking state, for example, Device 1 is on-hook. Then Device 1 sends on-hook request to Server. Server processes on-hook request, destroy the RTP channel and forwards on-hook request to Caller. Caller processes the on-hook request and sends on-hook response to Server. Server forwards this on-hook response to Device 1. The whole system goes to idle state.

[0058] In embodiments of the present disclosure, there is further provided a server to manage the call among multiple indoor stations with the DES. Hereinafter, reference will be made to Fig. 5 to describe server according to example embodiments of the present disclosure.

[0059] As illustrated in Fig. 5, a server 800 which is configured to manage the call among multiple indoor stations comprises a terminal registering unit 811, a proxy unit 812, a channel management unit 814 and a mediaforwarding unit 813. The terminal registering unit 811 is configured to register, in response to a register request from anindoor station. The proxy unit 812 is configured to forward a call request from a caller to the registered indoor station. The channel management unit is configured to create, maintain and delete the RTP channel. The mediaforwarding unit 813 is configured to forward the audio and video data from the caller to the registered indoor station through RTP channel.

[0060] Additionally, thechannel management unit 81 is further configured to bind all registered indoor stations to the channel after receiving call response from them. . Besides, in embodiment of the present disclosure, the channel management unit 814 is further configured to unbind the un-off-hook indoor station from the channel after receiving off-hook response from one indoor station. Besides, in embodiment of the present disclosure, the proxy unit is further configured to send cancel request to other un-off-hook devices after receiving off-hook request from one indoor station.

[0061] Hereinabove, embodiments of the present disclosure have been described in details through embodiments with reference to the accompanying drawings. It should be appreciated that, while this specification contains many specific implementation details, these details should not be construed as limitations on the scope of any invention or of what may be claimed, but rather as descriptions of features that may be specific to particular embodiments of particular inventions. Certain features that are described in this specification in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can aiso be implemented in multiple embodiments separately or in any suitable sub-combination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a sub-combination or variation of a sub-combination.

[0062] Various modifications, adaptations to the foregoing exemplary embodiments of this disclosure may become apparent to those skilled in the relevant arts in view of the foregoing description, when read in conjunction with the accompanying drawings. Any and all modifications will still fall within the scope of the non-limiting and exemplary embodiments of this disclosure. Furthermore, other embodiments of the disclosures set forth herein will come to mind to one skilled in the art to which these embodiments of the disclosure pertain having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. [0063] Therefore, it is to be understood that the embodiments of the disclosure are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are used herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. A household system of a door entry system (DES) for supporting multiple indoor stations (150, 160) in one apartment (100), characterized in that,

thehousehold systemcomprises a router (140),a plurality of indoor stations (150, 160), a gateway (1 0)and anindividual proxy server (120)belonging to one apartment (100); wherein

the router (140) is used for setting up the household network and connecting to all other devices of the apartment (100), including the server (120), the gateway (110) and the indoor stations (150, 160);

the indoor stations (150, 160)areused by a user to answer the call;

the gateway (110), one side of which is connected with thedoor entry network (130)used for connecting all devices that exposed out of the apartment(100) and the other side of whichis connected with the household network through therouter (140),and the DES devices out of the apartment (100)are capable of communicating with multiple indoor stations (150, 160)through the gateway (110);

the server (120), is configured to manage multiple indoor stations (150, 160)belonging to the apartment (100).

2. The system according to claim 1 , characterized in that, thegateway ( 0)comprises two network interface cards and a firewall, one card being connected with the door entry network (130) and the other card being connected with the household network,the firewall which discards all illegal data and only allows the specific data that sent to the specific port, the gateway (110) being configured to isolate and bridge the two networks.

3. The system according to claim 1 , characterized in that, the server (120)is capable of providing a function that supports multiple indoor stations (150, 160) to display incoming video simultaneously if theindoor stations (150, 160) have the videodisplay function.

4. The system according to any one of claims 1 to 3, characterized in that, theserver and the gateway can be integratedinto one device, named the gateway server (270),to manage muitiple indoor stations (250, 260), one side of the gateway server (270) being connected with the door entry network (230)and the other side of the gateway server (270)being connected with the household network through therouter (240), and the DES devices out of the apartment (200)being capable of communicating with multiple indoor stations (250, 260)through thegateway server (270).

5. The system according to any one of claims 1 to 3, characterized in that, both theproxy server and the gateway can be integrated into an indoor station, called the main indoor station (380),to manage multiple indoor stations (350, 360, 380), one side of the main indoor station (380) being connected with the door entry network (330) and the other sideof the main indoor station (380) being connected withthe household network through the router (340), and the DES devices out of the apartment (300)being capable of communicating with multiple indoor stations (350, 360, 380)through themain indoor station (380).

6. The system according to any one of claims 1 to 5, characterized in that, theDES can be a digital or an analog system.

7. The system according to claim 6, characterized in thatjf the DES is an analog system, the gateway further comprises a transform module.which iscapable of transforming audio, video and protocol data between analog system and digital system.

8. The system according to any one of claims 1 to 5, characterized in that.the connection in the apartment can be wired or wireless connection.

9. The system according to any one of claims 1 to 5, characterized in that,the indoor station (150, 60, 250, 260, 350, 360, 380)can be a mobile device or a fixed installed device.

10. The system according to claim 9, characterized in that.the mobile device (160, 260, 360)can be a smart phone, a Personal Digital Assistant (PDA), a tablet or a laptop.

11. The system according to any one of claims 1 to 5, characterized in that, the server (800) comprises:

a terminal registering unit (811), configured to register theindoor station in response to a register request from the indoor station;

a proxy unit (812), configured to forward a call request from a caller to the registered indoor station;

a channel management unit (814), configured to create and/or maintain and/or delete a Real-time Transport Protocol (RTP) channel for a call; and

amediaforwarding unit (813), configured to forward the audio and/or video datafrom the caller to the registered indoor stationsth rough the RTP channel.

12. The systemaccording tociaim 11, characterized in that,

thechannel management unit (814),further configured to bind all registered indoor stations to the channel after receiving call response from them; unbind other devices after receiving off-hook request from the off-hook indoor station;and

the proxy unit (812), further configured to send cancel request to other devices after receiving off-hook request from the off-hook indoor station.

13. A door entry system (DES) for supporting multiple indoor stations (150, 160) in one apartment (100), comprising:

an outdoor station, used by a caller to make a call; and

a door entry network (130), used for connecting all devices that exposed out of the apartment; and

thehousehold systemaccording to any one of claims 1 to 12.

14. An integrated indoor station (380) of a DES for supporting multiple indoor stations (350, 360, 380) in one apartment (300),characterized in that,

the integrated indoor station (380), which is configuredto manage multiple indoor stations (350, 360, 380)used by a user to answer the call, is integrated the function ofan indoor station, a gateway and an individual proxy server into it andconfigured to make sure the DES devices out of the apartment (300)can communicate with multiple indoor stations (350, 360, 380)through the integrated indoor station (380),wherein

one side of the integrated indoor station (380) is connected with a door entry network (330)used for connecting all devices that exposed out of the apartment; the other sideof the integrated indoor station (380) is connected withthe household network througha router (340).

15. The station according to claim 14, characterized in that, it (380) further comprises two network interface cards and a firewall, one card being connected with the door entry network (330) and the other card being connected with the household network, the firewall which discards all illegal data and only allows the specific data that sent to the specific port, the integrated indoor station (380) being configured to isolate and bridge the two networks.

16. The station according to claim 14, characterized in that, it (380) is capable of providing a function that supports multiple indoor stations (350, 360, 380) to display incoming video simultaneously if the indoor stations (350, 360, 380) have the video display function.

17. The station according to any one of claims 14 to 16, characterized in that, the door entry network (330)can be a digital or an analog network.

18. The station according to claim 17, characterized in that, if the door entry network (330)is an analog network, the integrated indoor station (380) further comprises a transform module, which is capable of transforming audio, video and protocol data between the analog network and the digital network.

19. The station according to any one of claims 14 to 16, characterized in that, the connection in the apartment (300) can be wired or wireless connection.

20. The station according to any one of claims 14 to 16, characterized in that,the indoor stations (350, 360, 380) can be a mobile device or a fixed installed device.

21. The system according to claim 20, characterized in that.the mobile device can be a smart phone, a PDA, a tablet or a laptop.