Abstract: A router is provided including a line card (LC), an active master board (AMB), a standby master board (SMB) and a LC for implementing a simple synchronization of a link state database (LSDB).

Abstract: A link fault handling method and a data forwarding apparatus are provided herein. The method includes: A first data forwarding apparatus keeps a neighboring relation with a second data forwarding apparatus after a link between the first data forwarding apparatus and the second data forwarding apparatus fails intermittently. The link between the first data forwarding apparatus and the second data forwarding apparatus fails intermittently in this way: A first fault detecting module in the first data forwarding apparatus receives no fault detection message from the second data forwarding apparatus at a preset time of receiving the message, but receives the fault detection message from the second data forwarding apparatus in an intermittency period after the preset time of receiving the message.

Abstract: A mobile terminal and an antenna apparatus therefor are provided. The antenna apparatus comprises an antenna body arranged at a first position in a space between the display case and the display screen; and a reference ground connected to the antenna body and arranged at a second position in the space, the reference ground having an electromagnetic band gap structure. With such a structure, it is possible to effectively improve the radiation efficiency of the antenna without increasing the size of the antenna apparatus. Thus, the antenna apparatus can satisfy the design requirement on portability of the mobile terminal.

Abstract: A method and pre-corrector for correcting signals in radio frequency links are provided. The method comprises: obtaining, in a time division order, a set of pre-distortion vectors for the respective radio frequency links by using one and the same set of pre-distortion vector obtaining means based on difference in arrival time of cyclic delay frames in the respective radio frequency links of a multiple input multiple output (MIMO) system; and correcting a subsequent signal in the respective radio frequency links by using the set of pre-distortion vectors corresponding to that radio frequency link. With the present invention, it is only required to scan a frame header once to generate an error vector table for the input signal across the entire dynamic range of power. The device can be reused by utilizing the cyclic delay frame structure, so as to achieve high linearity of a radio frequency header.

Abstract: Methods and apparatuses to terminate transmission lines using voltage limiters. In one aspect, a termination circuit is integrated on a substrate to terminate a transmission line connected from outside the substrate. The termination circuit includes: a port to interface with the transmission line; a first resistive path including a first voltage limiter coupled between the port and a first power supply voltage provided on the substrate resistive path; and a second resistive path including a second voltage limiter coupled between the port and a second power supply voltage provided on the substrate.

Abstract: A method for advertising routing information by a routing device includes: checking whether a routing device is active; by the routing device, generating routing information, and marking the routing information with a check result; and advertising the routing information. With the present invention, a route attribute of routing information is set, so that the routing information can reflect the active or standby state of the active routing device and standby routing device; after the routing information is advertised, the routing of a remote routing device is affected. Thus, the remote routing device always selects the active routing device to forward packets, which ensures the reachability and connectivity of the network.

Abstract: A method for communication between IP devices is provided. The method includes: receiving a dynamic routing protocol control packet sent by each of actual physical routers in a virtual router; obtaining a virtual IP address according to the dynamic routing protocol control packet; and using the virtual IP address as a next hop address and sending information to be sent to an external network to the virtual router. Further, a system and a router for communication between IP devices are also provided. Through the technical solutions of the present invention, when the master router is transited, the conversion of the internal dynamic routing protocol matches with the transiting of the master router performed by the virtual. Thus, it is ensured that the transited master router can receive the information sent by the internal router in a short time.

Abstract: Methods and apparatuses to terminate transmission lines using voltage limiters. In one aspect, a termination circuit is integrated on a substrate to terminate a transmission line connected from outside the substrate. The termination circuit includes: a port to interface with the transmission line; a first resistive path including a first voltage limiter coupled between the port and a first power supply voltage provided on the substrate resistive path; and a second resistive path including a second voltage limiter coupled between the port and a second power supply voltage provided on the substrate.

Abstract: The invention discloses an antenna, which comprises a reference ground, a first radiation branch and a second radiation branch. The reference ground comprises a first grounding point and a second grounding point; the first radiation branch is connected to the reference ground via the first grounding point; the second radiation branch is connected to the reference ground via the second grounding point; wherein a slot is formed between the first radiation branch and the second radiation branch, and a distributed capacitance for coupling a signal is formed by coupling the first radiation branch and the second radiation branch via the slot; a connecting point is a feeding point via which one end of the second radiation branch for coupling the signal is connected to a radio frequency (RF) feed line, the feeding point arranged between the first grounding point and the second grounding point.

Abstract: A router is provided including a line card (LC), an active master board (AMB), a standby master board (SMB) and a LC for implementing a simple synchronization of a link state database (LSDB).

Abstract: A phase-locked loop (PLL) includes a phase-frequency detector circuit configured to detect an error of an output clock signal in relation to a reference clock signal and to generate a charge pump control signal therefrom and a charge pump circuit configured to charge and discharge an output node thereof responsive to the charge pump control signal. The PLL further includes a current-mode loop filter circuit coupled to the output node of the charge pump circuit and configured to generate a filtered current from the current at the output node of the charge pump circuit, and a current-controlled oscillator configured to generate the output clock signal responsive to the filtered current. The current-mode loop filter circuit may be self-biased. For example, the current-mode loop filter circuit and the charge pump may be biased responsive to a common bias control signal generated by the current-mode loop filter circuit.

Abstract: A phase-locked loop (PLL) includes a phase-frequency detector circuit configured to detect an error of an output clock signal in relation to a reference clock signal and to generate a charge pump control signal therefrom and a charge pump circuit configured to charge and discharge an output node thereof responsive to the charge pump control signal. The PLL further includes a current-mode loop filter circuit coupled to the output node of the charge pump circuit and configured to generate a filtered current from the current at the output node of the charge pump circuit, and a current-controlled oscillator configured to generate the output clock signal responsive to the filtered current. The current-mode loop filter circuit may be self-biased. For example, the current-mode loop filter circuit and the charge pump may be biased responsive to a common bias control signal generated by the current-mode loop filter circuit.

Abstract: A home Message Center (MC) in a telecommunications network is capable of receiving a short message, the short message being originated by an A-subscriber and destined to a B-subscriber, and determines that prepaid charging is applicable for the short message for at least one of the A-subscriber and the B-subscriber. A PrePaid Charging Service Control Point (PPC SCP) is connected to the home MC and is responsible of prepaid accounting for the at least one of the A-subscriber and the B-subscriber. The home MC sends to a PPC SCP an indication for notifying the PPC SCP that prepaid charging is applicable for the short message for the at least one of the A-subscriber and the B-subscriber, and based on the indication, the PPC SCP charges a prepaid account of the at least one of the A-subscriber and the B-subscriber for the short message.

Abstract: A home Message Center (MC) in a telecommunications network is capable of receiving a short message, the short message being originated by an A-subscriber and destined to a B-subscriber, and determines that prepaid charging is applicable for the short message for at least one of the A-subscriber and the B-subscriber. A PrePaid Charging Service Control Point (PPC SCP) is connected to the home MC and is responsible of prepaid accounting for the at least one of the A-subscriber and the B-subscriber. The home MC sends to a PPC SCP an indication for notifying the PPC SCP that prepaid charging is applicable for the short message for the at least one of the A-subscriber and the B-subscriber, and based on the indication, the PPC SCP charges a prepaid account of the at least one of the A-subscriber and the B-subscriber for the short message.