Abstract: Provided is a method for preparing lead iodide, which controls the crystal form of lead iodide through temperature, including: dissolving a lead compound in a first acid solution and adding an iodine compound to form a reaction solution including the first lead iodide; and heating the reaction solution to a temperature of 60° C. or more and standing at a constant temperature, to obtain the second lead iodide, wherein a peak intensity of the (003) crystal plane of the second lead iodide is greater than or equal to a peak intensity of the (110) crystal plane. Provided is also a method for preparing the perovskite film.

Abstract: A horizontal-vertical drain board-flocculation vacuum preloading sediment treatment method, including (1) electro-osmotic electrodes disposed on the top and bottom of each reinforcing bar of the reinforced frame; (2) after the sediment is blown to the bottommost layer of vacuum preloading tank, the support is fitted over each reinforced frame, and the clips are fastened; (3) the transverse drain board passes through the support, one end of transverse drain board is connected to a curved tube; (4) repeat Step 2 and Step 3 until the sediment is blown to the surface layer of vacuum preloading tank; (5) a vertical drain board is arranged vertically between two adjacent rows of reinforced frames; (6) the curved tube is connected to the first junction block through the second junction block, and then the geotextile and sealing film are laid, the vacuum pump and power supply are switched on at last.

Abstract: A horizontal-vertical drain board-flocculation vacuum preloading sediment treatment method, including (1) electro-osmotic electrodes disposed on the top and bottom of each reinforcing bar of the reinforced frame; (2) after the sediment is blown to the bottommost layer of vacuum preloading tank, the support is fitted over each reinforced frame, and the clips are fastened; (3) the transverse drain board passes through the support, one end of transverse drain board is connected to a curved tube; (4) repeat Step 2 and Step 3 until the sediment is blown to the surface layer of vacuum preloading tank; (5) a vertical drain board is arranged vertically between two adjacent rows of reinforced frames; (6) the curved tube is connected to the first junction block through the second junction block, and then the geotextile and sealing film are laid, the vacuum pump and power supply are switched on at last.

Abstract: Embodiments of the present invention provide a cell access processing method and apparatus and a communication system. In a cell access processing method, an access request message is sent by a terminal. The access request message includes identification information of the terminal. A CSG information request message is sent to a CSG subscription information server of a roaming network. The CSG information request message includes the identification information of the terminal. A CSG information response message is sent by the CSG subscription information server according to the CSG information request message. The CSG information response message includes CSG information corresponding to the identification information of the terminal. Access control is performed on the terminal according to the CSG information.

Abstract: A method and device for establishing or modifying a local IP access bearer are provided by the embodiments of the present invention, said method includes: a handover request message transmitted by an evolved Node Base station is received, said handover request message carries an evolved Node Base station identifier, said evolved Node Base station identifier is the same as the local packet data network gateway identifier; the local breakout ability of said evolved Node Base station is obtained; according to said evolved Node Base station identifier, the local breakout ability of said evolved Node Base station and the local IP access point name, the local IP access bearer is established or modified between a serving gateway and the local packet data network gateway, said serving gateway is located in the core network or the evolved Node Base station.

Abstract: The present invention discloses a method, an apparatus, and a system for performing a handover between home base stations. The method includes receiving a handover request for a handover to a target home base station, where the handover request is sent by a source home base station, determining whether the source home base station and the target home base station are in a same local network, if yes, sending the connection establishment related information of the target home base station to the L-GW to which the target home base station connects, and establishing a user-plane tunnel between the target home base station and the connected L-GW. Through the present invention, continuity of an LIPA IP data session can be implemented when a terminal is handed over between different home base stations in the same local network.

Abstract: Embodiments of the present invention provide a cell access processing method and apparatus and a communication system. In a cell access processing method, an access request message is sent by a terminal. The access request message includes identification information of the terminal. A CSG information request message is sent to a CSG subscription information server of a roaming network. The CSG information request message includes the identification information of the terminal. A CSG information response message is sent by the CSG subscription information server according to the CSG information request message. The CSG information response message includes CSG information corresponding to the identification information of the terminal. Access control is performed on the terminal according to the CSG information.

Abstract: A method, user equipment (UE) and system relates to communications technologies, and in particular, to a network selection technology for a UE on a mobile communication network. The method includes obtaining a public land mobile network and closed subscriber group identity (PLMN/CSG ID) combination parameter of a network that covers a current location; querying an allowed CSG list according to the PLMN/CSG ID combination parameter; and selecting a network according to a query result.

Abstract: A method and device for establishing or modifying a local IP access bearer are provided by the embodiments of the present invention, said method includes: a handover request message transmitted by an evolved Node Base station is received, said handover request message carries an evolved Node Base station identifier, said evolved Node Base station identifier is the same as the local packet data network gateway identifier; the local breakout ability of said evolved Node Base station is obtained; according to said evolved Node Base station identifier, the local breakout ability of said evolved Node Base station and the local IP access point name, the local IP access bearer is established or modified between a serving gateway and the local packet data network gateway, said serving gateway is located in the core network or the evolved Node Base station.

Abstract: The present invention discloses a method, system, network side device, and UE of managing CSG membership. The method includes: detecting, by a network side, a change of CSG membership of a UE when the UE camps on a CSG cell and establishes a default bearer; and when detecting the change of the CSG membership of the UE, triggering, by the network, a Detach procedure between the network side and the UE by using an existing path between the network side and the UE, and indicating state information about the CSG membership of the UE, where the state information is used to instruct the UE to perform an operation with respect to the change of the CSG membership according to the state information.

Abstract: Embodiments of the present invention disclose a service processing method, a communication device, and a communication system. The service processing method includes: receiving a request message initiated by a user equipment (UE); and changing a current default bearer of the UE according to the received request message, to a bearer corresponding to a service that the UE needs to obtain in a current serving cell. The communication device includes: a generating unit, configured to generate a request message, where the request message carries information indicating a service required by a UE; and a sending unit, configured to send the request message generated by the generating unit to a network side, where the network side changes a current default bearer of the UE according to the information carried in the request message, to a bearer corresponding to a service that the UE needs to obtain in a current serving cell.

Abstract: A method, user equipment (UE) and system relates to communications technologies, and in particular, to a network selection technology for a UE on a mobile communication network. The method includes obtaining a public land mobile network and closed subscriber group identity (PLMN/CSG ID) combination parameter of a network that covers a current location; querying an allowed CSG list according to the PLMN/CSG ID combination parameter; and selecting a network according to a query result.