摘要:
The present invention provides a subband determining method, a base station, user equipment, and a communications system, each of which is used for information feedback. The base station of the present invention finds the subband size on the basis of a system bandwidth and divides the system bandwidth into subbands. The base station further (i) selects some subbands to form a subband set and assign the subband set to user equipment (UE) and (ii) notifies the user equipment (UE) of information about the subband set. The user equipment (UE) in turn finds its corresponding subband size and the number of subbands for use in feedback on the basis of the size of the assigned subband set. The user equipment (UE) further (i) divides the subband set into its corresponding subbands on the basis of a result found and (ii) feeds back information about a predetermined number of subbands to the base station. The base station carries out optimization of its transmitter on the basis of the information, fed back from the user equipment (UE), so as to not only secure a quality of service of a wireless cell, but also improve system efficiency. This method allows feedback to be carried out for downlink information with ease and high efficiency. This in turn reduces load for uplink wireless transmissions and improves feedback precision so as to save wireless resources and improve system efficiency.
摘要:
The present invention provides an interference-overload-indicator generating device, a method of generating an interference overload indicator, an interference-overload-indicator generation controller, a method of controlling interference-overload-indicator generation, and a method of indicating interference overload, and a base station utilizing these methods, each of which is used in an uplink FDMA cellular communication system. The base station includes an interference-overload-indicator generation control sub-system (1000), an interference-overload-indicator generation sub-system (2000), and a transmitting/receiving sub-system (3000). The interference-overload-indicator generation control sub-system (1000) judges whether or not a condition to initiate interference indicator generation is satisfied, and activates the interference-overload-indicator generation sub-system (2000) only when the condition is satisfied. This makes it possible to reduce a signaling size of the interference indicator. For further reducing the signaling size, an interference indicator signaling is generated by a method such as differential coding, state coding, or a bitmap, and transmitted. According to the present invention, an interference overload indicator generation control mechanism is relatively simple and the signaling size of the interference indicator is small.
摘要:
A subband determining method, a base station, user equipment, and a communications system are provided. The base station of the present invention finds the subband size on the basis of a system bandwidth and divides the system bandwidth into subbands. The base station further selects some subbands to form a subband set and assign the subband set to user equipment and notifies the user equipment of information about the subband set. The user equipment in turn finds its corresponding subband size and the number of subbands for use in feedback on the basis of the size of the assigned subband set. The user equipment further divides the subband set into its corresponding subbands on the basis of a result found and feeds back information about a predetermined number of subbands to the base station. The base station carries out optimization of its transmitter on the basis of the information.
摘要:
The present invention provides: a method for switching an RRC state; an eNB; and a UE. The eNB (104) of the present invention includes: a sending/receiving unit (1040) for carrying out data communication with one or more MBMS•UEs in a cell; a calculation unit (1042) for calculating the number of RRC connections currently available in a system; an execution determination unit (1044) for determining whether or not a switchover of an RRC state of the one or more MBMS•UEs is necessary, on the basis of the number of RRC connections currently available in the system and a threshold value of the number of RRC connections; a request unit (1046) for transmitting, via the sending/receiving unit (1040), a measurement report request to all of the one or more MBMS•UEs in the cell, in a case where the execution determination unit (1044) determines that the switchover of the RRC state of the MBMS•UE(s) is necessary; and an accurate value determination unit (1048) for (i) determining an accurate reference measurement threshold value with respect to a parameter on the basis of the threshold value of the number of the RRC connections and data of a measured parameter, received via the sending/receiving unit (1040) from each of the one or more MBMS•UEs, and (ii) transmitting, via the sending/receiving unit (1040), the accurate reference measurement threshold value to all of the one or more MBMS•UEs in the cell.
摘要:
The present invention provides: a method for switching an RRC state; an eNB; and a UE. The eNB (104) of the present invention includes: a sending/receiving unit (1040) for carrying out data communication with one or more MBMS•UEs in a cell; a calculation unit (1042) for calculating the number of RRC connections currently available in a system; an execution determination unit (1044) for determining whether or not a switchover of an RRC state of the one or more MBMS•UEs is necessary, on the basis of the number of RRC connections currently available in the system and a threshold value of the number of RRC connections; a request unit (1046) for transmitting, via the sending/receiving unit (1040), a measurement report request to all of the one or more MBMS•UEs in the cell, in a case where the execution determination unit (1044) determines that the switchover of the RRC state of the MBMS•UE(s) is necessary; and an accurate value determination unit (1048) for (i) determining an accurate reference measurement threshold value with respect to a parameter on the basis of the threshold value of the number of the RRC connections and data of a measured parameter, received via the sending/receiving unit (1040) from each of the one or more MBMS•UEs, and (ii) transmitting, via the sending/receiving unit (1040), the accurate reference measurement threshold value to all of the one or more MBMS•UEs in the cell.
摘要:
This invention provides a mobile communication system, including: a base station device; and a mobile station device, the mobile communication system having a predetermined total bandwidth made of a set of a plurality of downlink component carriers, the base station device and the mobile station device processing each downlink physical layer provided for a respective one of the plurality of downlink component carriers, and the set of the plurality of downlink component carriers including (i) a downlink component carrier employing a subframe structure according to which some symbols at the beginning of a subframe include control information and (ii) a downlink component carrier employing a subframe structure according to which some symbols at the beginning of a subframe do not include control information.
摘要:
A base station (101) of the present invention includes a sending/receiving section (1010) for sending/receiving control signaling information and user data to/from a user device (102), the base station (101) and the user device (102) being wirelessly communicable with each other in a wireless cell (105) of the base station (101); a resource allocation section (1011) for (i) dividing a downlink system bandwidth of a communication system into a plurality of downlink basic bandwidths and (ii) carrying out allocation of resource blocks for uplink control signaling information; a sequence allocation section (1012) for carrying out allocation of a sequence(s) of a resource of the uplink control signaling information in each of an uplink basic bandwidth(s), on the basis of the number of downlink basic bandwidths allocated to the user device (102), so that the uplink control signaling information in each of the downlink basic bandwidth(s) allocated to the user device (102) is fed back to the base station; and a resource scheduling transmission optimizing section (1013) for obtaining the uplink control signaling information of each of the downlink basic bandwidth(s) allocated to the user device (102), on the basis of the sequence(s) thus allocated, and optimally allocating resource blocks of a downlink common data channel to the user device (102).
摘要:
The present invention discloses a channel reconstruction method for a downlink multi-antenna-multi-base-station with inconsistent antenna configuration. Firstly, a serving base station configures a user equipment. If antenna configuration of the multi-antenna-multi-base-station system is inconsistent, virtual antennas are introduced to a base station with fewer antennas in the system. A user equipment selects and feeds back indices of the virtual antennas and reconstructs channels of the multi-antenna-multi-base-station system to generate a consistent antenna configuration. Finally, the multi-antenna-multi-base-station system transmits a signal to the user equipment by adopting a transmission pre-processing scheme of the consistent antenna configuration. The present invention provides also a serving base station, a cooperative base station and a user equipment for realizing the channel reconstruction method. The present invention has advantages of large application range, simple implementation and better performance.
摘要:
The present invention discloses a channel reconstruction method for a downlink multi-antenna-multi-base-station with inconsistent antenna configuration. Firstly, a serving base station configures a user equipment. If antenna configuration of the multi-antenna-multi-base-station system is inconsistent, virtual antennas are introduced to a base station with fewer antennas in the system. A user equipment selects and feeds back indices of the virtual antennas and reconstructs channels of the multi-antenna-multi-base-station system to generate a consistent antenna configuration. Finally, the multi-antenna-multi-base-station system transmits a signal to the user equipment by adopting a transmission pre-processing scheme of the consistent antenna configuration. The present invention provides also a serving base station, a cooperative base station and a user equipment for realizing the channel reconstruction method. The present invention has advantages of large application range, simple implementation and better performance.
摘要:
The present invention provides a method for allowing transparent transmission and non-transparent transmission of a relay node to coexist. That is, a frequency-division multiplex system is employed so that a transparent transmission mode is used in one operating carrier frequency bandwidth whereas a non-transparent transmission mode is used in another operating carrier frequency bandwidth. In addition, according to the frequency-division multiplex system, the transparent transmission mode is used for a plurality of subframes whereas the non-transparent transmission mode is used for another plurality of subframes. The method for allowing transparent transmission and non-transparent transmission of a relay node to coexist makes it possible to effectively reduce a cost of a system.