Abstract: A receiver with Inphase-Quadrature (I-Q) imbalance compensation and an I-Q imbalance compensation method thereof are provided. The receiver chooses a first receiving signal which includes a first data and a first noise, as well as a second receiving signal which includes a second data and a second noise from a plurality of receiving signals. The first data have a first positive frequency data and a first negative frequency data, while the second data have a second positive frequency data and a second negative frequency data. The receiver calculates an I-Q imbalance compensation parameter according to the first receiving signal and the second receiving signal, and compensates for a third receiving signal according to the I-Q imbalance compensation parameter. The I-Q imbalance compensation method is applied to the receiver to implement the aforesaid operations.

Abstract: A user equipment and a device-to-device communication selection method thereof are provided. The user equipment is configured to receive device-to-device communication information and discover device-to-device communication nodes. The user equipment is further configured to determine at least one selection procedure from a plurality of selection procedures according to the device-to-device communication information and select at least one first device-to-device communication target from the discovered device-to-device communication node(s) according to the determined selection procedure(s). The device-to-device communication selection method is for use in the user equipment to execute the aforesaid operations.

Abstract: A wireless communication system and a resource allocation method thereof are provided. The wireless communication system includes a base station and a plurality of user equipments. The base station or one of the user equipments is configured to transmit resource allocation information to the user equipments. The user equipments are configured to perform a device-to-device communication and/or perform a device-to-device discovery according to the resource allocation information. The resource allocation method is applied to the wireless communication system to perform the aforesaid operations.

Abstract: A receiver with Inphase-Quadrature (I-Q) imbalance compensation and an I-Q imbalance compensation method thereof are provided. The receiver chooses a first receiving signal which includes a first data and a first noise, as well as a second receiving signal which includes a second data and a second noise from a plurality of receiving signals. The first data have a first positive frequency data and a first negative frequency data, while the second data have a second positive frequency data and a second negative frequency data. The receiver calculates an I-Q imbalance compensation parameter according to the first receiving signal and the second receiving signal, and compensates for a third receiving signal according to the I-Q imbalance compensation parameter. The I-Q imbalance compensation method is applied to the receiver to implement the aforesaid operations.

Abstract: A wireless device and a wireless network system are provided. The wireless device is configured to discover an under-discovered wireless device, and a first network server serves the under-discovered wireless device. The under-discovered wireless device transmits a terminal signal to the first network server at a specific frequency and in a specific period. The wireless device includes a transceiver and a processor electrically connected to the transceiver. The processor obtains a piece of feature information regarding to the under-discovered wireless device by listening to the terminal signal via the transceiver, and identifies that the under-discovered wireless device is in a discovery coverage of the wireless device based on a determination result that the feature information or a normalized feature information is higher than a predetermined threshold.

Abstract: A relay station and a backhaul control communication thereof are provided. A wireless communication system comprises the relay station, a base station, and a core network. The relay station is wirelessly connected to the base station, while the base station is wiredly connected to the core network. The relay station comprises a processing unit and a transceiver. The processing unit is configured to create a radio link having a control plane connection between the relay station and the base station and create a backhaul link between the relay station and the base station by the control plane connection of the radio link. The transceiver is configured to transmit a backhaul control message to the core network via the backhaul link.

Abstract: A high-power base station and a low-power base station for use in a heterogeneous network system and transmission methods thereof are provided. Interference caused by the high-power base station in control channels of the heterogeneous network system are avoided effectively based on one of the following strategies: (1) transmitting control information of the low-power base station by the high-power base station in the same control channel; (2) transmitting control information of the low-power base station by the low-power base station attached with a user end in a specific control channel which is pre-defined by the low-power base station; and (3) transmitting control information of the low-power base station by the low-power base station in a specific control channel which is determined based on an offset allocated by the heterogeneous network system.

Abstract: A relay node, a donor evolved NodeB (DeNB) and a communication method thereof for use in a long term evolution (LTE) network are provided. The LTE network comprises the relay node and the DeNB. In the present LTE network of the present invention, at least two bearers can be set up between the relay node and the DeNB so that signaling messages can be transmitted between the relay node and the DeNB based on different priorities.

Abstract: Wireless communication apparatuses, header compression methods thereof, and header decompression method thereof are provided. The header compression method enables the transceiver to establish a tunnel for a user equipment, enables the processing unit to receive a first packet, enables the processing unit to generate a second packet comprising an outer header set and the first packet, enables the processing unit to replace the outer header set of the second packet with a replaced header, and enables the transceiver to transmit the second packet by the tunnel according to an identity recorded in the replaced header. The header decompression method decompresses the header compressed by the header compression method.

Abstract: A wireless communication station and a transmission interface switching method thereof are provided. A network system includes the wireless communication station and a base station. The wireless communication station and the base station have a first connection therebetween. The wireless communication station disconnects the first connection, establishes a second connection, and establishes a target transmission interface with the base station via the second connection. Alternatively, the wireless communication station does not disconnect the first connection, and establishes the target transmission interface via the first connection. The target transmission interface is formed between the wireless communication station and a base station module, a serving gateway, a packet data network gateway, and a relay gateway of the base station.

Abstract: A relay station and a backhaul connection method thereof are provided. The relay station adopts an NAS mechanism. A wireless communication system comprises the relay station, a base station, and a core network. The relay station comprises a processing unit and a transceiver. The processing unit enters a first state of the NAS mechanism after the relay station creates a radio connection with the core network. The transceiver transmits a backhaul connection request to the base station after the relay station enters the first state. The processing unit then enters a second state of the NAS mechanism after the transmission of the backhaul connection request. The transceiver then receives a backhaul connection response from the base station after the transmission of the backhaul connection request. The processing unit then enters the first state after the receipt of the backhaul connection response.

Abstract: A cooperative apparatus and a resource block allocation method thereof for use in a wireless network are provided. The wireless network comprises a plurality of femtocells. The cooperative apparatus groups the femtocells based on signal interferences between the femtocells. The femtocells with higher signal interferences are joined to the same femtocell group. The cooperative apparatus averagely allocates resource blocks to the femtocells in the same femtocell group, and randomly allocates resource blocks to different femtocell groups.

Abstract: A base station and an attaching method thereof are provided. A relay network system comprises the base station, a relay station and a core network. The base station is connected with the core network via a backhaul link. The base station comprises a processing unit and a transceiver. The processing unit is configured to setup a communication link procedure between the relay station and the core network corresponding to a link request from the relay station, and to create a mapping table for connecting the relay station and the core network. The transceiver is configured to forward network packets and control signals between the relay station and the core network based on the mapping table.

Abstract: An evolved NodeB eNB, a first relay node (RN) and a connection initialization method thereof for use in a long term evolution (LTE) network are provided. The LTE network comprises the eNB, the first RN, a second RN and a mobility management entity (MME). In the LTE network of the present invention, various multi-hop protocols can be achieved by using different identification mapping implementations.

Abstract: A cooperative apparatus and a resource block allocation method thereof for use in a wireless network are provided. The wireless network comprises a plurality of femtocells. The cooperative apparatus groups the femtocells based on signal interferences between the femtocells. The femtocells with higher signal interferences are joined to the same femtocell group. The cooperative apparatus averagely allocates resource blocks to the femtocells in the same femtocell group, and randomly allocates resource blocks to different femtocell groups.

Abstract: A wireless communication system is disclosed. The wireless communication system comprises a core network, a base station and a relay station. The relay station transmits a first message with a system resource information of the relay station to the base station. The base station generates a configuration pattern according to the system resource information of the relay station, and transmits a second message with the configuration pattern to the relay station. The configuration pattern is used to divide the radio resource unit of the wireless communication system into a first set and a second set. Therefore, the base station transmits a first signal to the relay station through the first set, and the relay station transfers a second signal with a user equipment through the second set.

Abstract: A relay node, a donor evolved NodeB (DeNB) and a communication method thereof for use in a long term evolution (LTE) network are provided. The LTE network comprises the relay node and the DeNB. In the present LTE network of the present invention, at least two bearers can be set up between the relay node and the DeNB so that signaling messages can be transmitted between the relay node and the DeNB based on different priorities.

Abstract: An evolved NodeB eNB, a first relay node (RN) and a connection initialization method thereof for use in a long term evolution (LTE) network are provided. The LTE network comprises the eNB, the first RN, a second RN and a mobility management entity (MME). In the LTE network of the present invention, various multi-hop protocols can be achieved by using different identification mapping implementations.

Abstract: Wireless communication apparatuses, header compression methods thereof, and header decompression method thereof are provided. The header compression method enables the transceiver to establish a tunnel for a user equipment, enables the processing unit to receive a first packet, enables the processing unit to generate a second packet comprising an outer header set and the first packet, enables the processing unit to replace the outer header set of the second packet with a replaced header, and enables the transceiver to transmit the second packet by the tunnel according to an identity recorded in the replaced header. The header decompression method decompresses the header compressed by the header compression method.

Abstract: A base station and an attaching method thereof are provided. A relay network system comprises the base station, a relay station and a core network. The base station is connected with the core network via a backhaul link. The base station comprises a processing unit and a transceiver. The processing unit is configured to setup a communication link procedure between the relay station and the core network corresponding to a link request from the relay station, and to create a mapping table for connecting the relay station and the core network. The transceiver is configured to forward network packets and control signals between the relay station and the core network based on the mapping table.