摘要:
A connection establishment method for establishing a random access type connection using a random access channel, which is used in a radio system having several subscriber terminal equipments (37 to 38) and base stations (33 to 36) where one or more transceiver units (40 to 47) operate, and in which system connection establishment between one of the subscriber terminal equipments (37 to 38) and the base station (33 to 36) is possible when the one subscriber terminal equip nt (37 to 38) is situated in the coverage area of one or more transceiver units (40 to 47) of the base station, where the one subscriber terminal equipment (3 to 38) evaluates the quality of the connections to be established. Starting from a condition in which no connection is established with the one subscriber terminal equipment, the one subscriber terminal equipment (37 to 38) forms a random access type connection to more than one base station transceiver unit (40 to 47) included in one or more base stations (33 to 38). m
摘要翻译:一种连接建立方法,用于使用随机接入信道建立随机接入型连接,所述随机接入信道用于具有若干用户终端设备(37至38)和基站(33至36)的无线电系统中,其中一个或多个收发器单元(40 并且当一个用户终端设备(37至38)位于该用户终端设备(37至38)中时,可以在其中一个用户终端设备(37至38)和基站(33至36)之间进行系统连接建立 所述基站的一个或多个收发器单元(40至47)的覆盖区域,其中所述一个用户终端设备(3至38)评估要建立的连接的质量。 从与一个用户终端设备不建立连接的条件开始,一个用户终端设备(37至38)形成随机接入型连接到多于一个的基站收发器单元(40至47),其包括在一个或多个 更多的基站(33到38)。 m
摘要:
A cellular radio system and a handover method in a cellular radio system is provided. The cellular radio system includes a subscriber terminal and a base station. In the system, the subscriber terminal maintains and continuously updates an active set of base stations. One or several base stations belonging to the active set has a connection or connection set-up facilities to the subscriber terminal. The subscriber terminal controls the downlink transmission of one or several base stations of the active set by switching the transmission of the base station on or off. This method provides a fast soft handover similar to a hard handover.
摘要:
According to the proposed method, the frequency of power control commands transmitted on a power control channel is changed according to the traffic. When the traffic becomes slower in at least one direction due to a DTX state, a slower transfer rate, asymmetric data transfer or for any other reason, the frequency of power control commands is lowered. Both the base station and the personal station may lower the frequency of the commands which they send. An alternative to changing the frequency of power control commands is to change the energy of power control bits. The duration of power control bits must hereby be extended, if a standard bit error ration is desired. If the system is frequency-divided and/or time-divided and uses frequency control command of several bits, the length of the command word may be shortened in addition to or as an alternative to the change in frequency. The power control algorithm may be changed several times during a traffic connection.
摘要:
A two-dimensional optimization between adaptive modulation and coding (AMC) and multi-code transmission targets the best bit rate at which a highest useable modulation and coding scheme (MCS) achieves a maximum allowed number of channelization codes or less. The optimized MCS and number of channelization codes at a best bit rate is communicated from a transmitter to a receiver, possibly also with power information for instance using a transport format combination indicator (TFCI). A user equipment may play the role of carrying out the optimization and signaling the result to the Node B or may instead receive the result as carried out by the Node B or RNC in response to a radio link quality measurement sent from the UE to the Node B.
摘要翻译:自适应调制和编码(AMC)和多码传输之间的二维优化目标是最高可用调制和编码方案(MCS)达到最大允许数量的信道化码或更少的最佳比特率。 优化的MCS和以最佳比特率的信道化码的数量从发射机传送到接收机,可能也可以使用例如使用传输格式组合指示符(TFCI)的功率信息。 用户设备可以起到进行优化的作用,并将结果发送给节点B,或者可以接收由节点B或RNC响应于从UE发送到节点的无线电链路质量测量而执行的结果 B.
摘要:
The base station of a cellular radio system is in radio communication with the mobile stations of the cellular radio system by using mutually essentially orthogonal channels. In order to control the use of the channels, said channels are divided into groups with different priorities, so that the base station uses primarily the channel group with the highest priority. Channels belonging to different priority groups are put to use in a selective manner as a response to the loading of the base station.
摘要:
A method for minimizing the effect of interference in a radio system including a radio system comprises a measuring means which is adapted to measure the transmission frequency of the power control requests transmitted by a base transceiver station to each subscriber terminal. The radio system comprises an attenuation means which is adapted to alter the attenuation of the signals arriving at the reception band of the base transceiver station and which are transmitted by the subscriber terminal, the transmission frequency of power control requests transmitted to which has exceeded a predefined transmission frequency of power control requests.
摘要:
A radio connection is adapted to an environment changing over the connection in a cellular radio system where the radio traffic between the base station and the mobile stations is arranged on a multiple access principle, according to a given frame structure (402). For a given radio connection between the transmitting device and the receiving device, there is reserved a given data transmission capacity in said frame structure. The receiving device measures the connection quality (103) during the connection, and on the bases of the measured connection quality, the size of the data transmission capacity (104, 110) reserved for said connection in said frame structure is changed.
摘要:
According to the proposed method, the frequency of power control commands transmitted on a power control channel is changed according to the traffic. When the traffic becomes slower in at least one direction due to a DTX state, a slower transfer rate, asymmetric data transfer or for any other reason, the frequency of power control commands is lowered. Both the base station and the personal station may lower the frequency of the commands which they send. An alternative to changing the frequency of power control commands is to change the energy of power control bits. The duration of power control bits must hereby be extended, if a standard bit error ratio is desired. If the system is frequency-divided and/or time-divided and uses frequency control command of several bits, the length of the command word may be shortened in addition to or as an alternative to the change in frequency. The power control algorithm may be changed several times during a traffic connection.
摘要:
A diversity receiver in a radio apparatus has at least two reception branches and a RAKE receiver to combine signal received by the different reception branches as well as a measuring receiver to make frequency specific measurements. The radio apparatus includes a switch connected with at least one reception branch and has at least two states in the first of which the switch is arranged to direct a signal received by a reception branch to the RAKE receiver and in the second of which the switch is arranged to direct a signal received by a reception branch to the measuring receiver. The radio apparatus makes measurements at other than the operating frequency without the reception at the operating frequency being interrupted. In a communications system the measurements may be associated with a handover.
摘要:
An apparatus and corresponding method for deciding whether to perform link adaptation for communication transmitted from a first communication device to a second communication device, where the second communication device examines a signal received from the first communication device and provides a first indication of the quality of the signal. The method includes the steps of: recording at least one first indication of the quality of the signal as received by the second communication device; providing a second indication of the quality of the signal based on the at least one first indication of the quality of the signal; and deciding to perform link adaptation based on the second indication of the quality of the signal. The first indication of the quality of the signal is for example a signal to interference ratio (SIR) estimate. Often, the second indication of the quality of the signal is a changed SIR target value.