47 results about "E-UTRA" patented technology

An improved method of processing random access procedures, wherein the network receives at least one access burst to allow a network to estimate uplink received timing, the access burst containing at least a preamble, and transmits information for responding to the at least one access burst, while the mobile terminal configures at least one access burst containing at least a preamble and transmits the at least one access burst to allow a network to at least estimate uplink received timing.

An air interface for use with a mobile satellite system that extends the baseline LTE interface modulation and coding from 3GPP. The LTE OFDM and S-FDMA technologies are used in the lowest FDD E-UTRA assigned bandwidth of 1.4 MHz but can be extended up to 7 other bands. The key differentiator for S-LTE from LTE would be the use of 32-ary Amplitude Phase Shift Keying (32-APSK) in the uplink channel for S-FDMA with LDPC and turbo coding and 64-QAM in the downlink channel for OFDM with LDPC and turbo coding. This new mechanism for S-LTE with new combination of coding will allow a robust channel model for S-LTE air interface and will enable the S-LTE air interface to have an efficient link budget. The S-LTE air interface of the present invention can be implemented in 700 MHz, 1.5 GHz, 2.1 GHz and 2.6 GHz bands or any future bands allocated for the specific air interface.

This invention employs an inherent tradeoff in a radio bearer dependent data handling method for intra-E-UTRA handoffs. For user equipment using real time data, the source node forwards to the target node not yet acknowledged real time service data units and disconnects. This makes the handoff latency short at the expense of data traffic between nodes. For user equipment not needing real time data, the source node continues to receive user equipment acknowledgements during a time out period and only forwards service data units acknowledged during the time out period. This reduces X2 interface traffic between the source and target nodes but extends the handoff latency.

There is provided a method for determining transmission power for uplink signal, the method performed by a user equipment (UE) and comprising: determining a total transmission power for E-UTRA uplink signal and NR uplink signal, when the E-UTRA uplink signal and the NR uplink signal overlap in time, wherein the total transmission power satisfies a condition including on P_{CMAX_L} and P_{CMAX_H}, wherein P_{CMAX_L} is a lower limit for the total transmission power and P_{CMAX_H} is a higher limit for the total transmission power, wherein when the E-UTRA uplink signal is transmitted on a scheduling unit p, when the NR uplink signal is transmitted on a scheduling unit q, the scheduling unit p is taken as a reference for the determination; and transmitting the E-UTRA uplink signal and the NR uplink signal based on the determined total transmission power.

A method for handling an ATTACH reject message with packet radio service mobility management reject cause number (#14 cause) at a user equipment (UE) is provided. The method includes receiving, at the UE, an ATTACH accept message for a network service on a public land mobile network (PLMN) from a first network entity, wherein the PLMN is in a “forbidden PLMNs for general packet radio service (GPRS) service” list, detecting, by the UE, that the UE's evolved universal terrestrial radio access (E-UTRA) capability is disabled, and enabling, by the UE, the UE's E-UTRA capability and removing the PLMN from the “forbidden PLMNs for GPRS service” list.

In one embodiment, a method of transmitting system information on a down link shared channel structured as successive subframes includes transmitting (400 - 416) system information in regularly occurring time windows, each time window spanning some number of successive subframes. The method further includes indicating (406 / 408) to receiving user equipment (120) which subframes within a given time window carry system information. The method and variations thereof are applied, for example, to the transmission of dynamic system information on the down link shared channel or other down link channel in a 3GPP E-UTRA wireless communication network (100).

A cell reselection method comprises: after a user equipment UE resident in an evolved universal mobile telecommunications system terrestrial radio access network E-UTRAN sending a request message to a network side and the request message is rejected by the network side, when a designated condition is satisfied, the user equipment disabling an evolved universal mobile telecommunications system terrestrial wireless access E-UTRA capability, and reselecting another network, the designated condition comprising that: a rejection message of the network side carries a packet switched backoff timer and the user equipment locally does not run any circuit switched backoff timer. This application further provides a user equipment. This application is capable of implementing cell reselection of a UE when congestion occurs, so as to avoid the ping-pong effect, improve the user experience, and reduce UE power consumption.

A method for performing radio usage measurements to support radio link operations and/or load balancing may be performed at an evolved Node B (eNB). The method may include determining a first radio usage parameter. The first radio usage parameter may be a measurement of radio usage between an eNB and at least one wireless transmit receive unit (WTRU). The method may further include determining a second radio usage parameter. The second radio usage parameter may be a measurement of radio usage between the eNB and at least one relay node (RN) served by the eNB. The method may further include utilizing at least one of the first radio usage parameter or the second radio usage parameter to evaluate at least one of evolved universal terrestrial radio access (E-UTRA) radio link operations, radio resource management (RRM), network operations and maintenance (OAM), and self-organizing networks (SON) functions or functionalities.

The invention is applicable to the field of mobile communication, and provides an implementing method for limiting signaling in an evolution network, wherein after being resided to E-UTRA (Evolution network-Universal Terrestrial Radio Access), user equipment (UE) in a PCH (paging indicator channel) state initiates registration/update to a network side, and the UE at the network side is in non-PMM-CONNECTED state. According to the implementing method for limiting signaling in the evolution network, the calling expense can be saved, and the conventional equipment and protocols do not need to be modified; and simultaneously, in combination with an optimized network selected to reside in a repeated covering area, the paging range of the network can be further reduced.

A method and apparatus are disclosed comprising a combined open loop/closed loop uplink power control scheme for E-UTRA. The combined open and closed loop method for UL intra-cell PC controls the wireless transmit receive unit (WTRU) transmit power spectral density (PSD), PSDTx, (e.g. power per RB).

A method and apparatus for efficient uplink scheduling grant and scheduling request signaling for evolved universal terrestrial radio access ( E-UTRA) are disclosed. A wireless transmit/receive unit sends an uplink scheduling request to a Node-B whereby the Node-B sends the uplink scheduling grant in response to the uplink scheduling request. The uplink scheduling request includes a data, buffer occupancy value that indicates the amount of data that needs' to be transmitted in the uplink. The amount of data is quantized to integer factors of the number of bits that may be supported by one RB, and mapped to an index value with N-bit mapping having less than full resolution. The uplink scheduling grant assigns a number of resource blocks to the WTRU for uplink transmission. The number of RBs allocated is mapped to an index value using N-bit mapping having less than full resolution.

Systems and methodologies are described that facilitate optimal transmission of system parameter data in a wireless communication system. According to various aspects, a broadcast channel is split into at least two portions, wherein one portion allows for transmission of static system parameter data at a first data rate, and a second portion allows for transmission of semi-static and dynamic parameter data at a second disparate data rate.

In a wireless communication system, when a user equipment needs to deactivate its E-UTRA function due to a network related failure cause, a waiting period is set according to the mobility information of the user equipment. When the waiting period has elapsed after deactivating the E-UTRA function, the user equipment is configured to reactivate the E-UTRA function.

A method and apparatus are disclosed comprising a combined open loop/closed loop uplink power control scheme for E-UTRA. The combined open and closed loop method for UL intra-cell PC controls the wireless transmit receive unit (WTRU) transmit power spectral density (PSD), PSD_Tx, (e.g. power per RB).

A method for handling NR capabilities comprises the first BS transmitting at least one E-UTRA capability and at least one first NR capability of a communication device to the second BS; the second BS generating a RRC Connection Reconfiguration message according to the at least one E-UTRA capability and the at least one first NR capability, wherein the RRC Connection Reconfiguration message comprises at least one E-UTRA configuration and a NR configuration; the second BS transmitting the RRC Connection Reconfiguration message to the first BS; the first BS generating a first NR-access RRC message comprising the RRC Connection Reconfiguration message; the first BS transmitting the first NR-access RRC message to the communication device; and the second BS receiving a RRC Connection Reconfiguration Complete message from the communication device.

The present invention provides an apparatus and method for energy saving of small cells. In one novel aspect, a small cell that detects a low load condition broadcasts a shutdown request. After receiving the shutdown request message, the small cell enters a freeze state, in which the small cell is prevented from being switched off. In another novel aspect, a small cell in a low load condition requests measurement reports from multiple UEs. Multiple UEs reply with a measurement report request message, which contains the detected neighbor ID and the traffic load of the UE. The low-load small cell contains information obtained from the measurement report in the shutdown request message. In another novel aspect, the small cell broadcasts an open request message. After receiving the open confirmation message from the closed neighboring small cells, the small cell selects one or more target cells to send a cell activation request. Close the small cell, and use the cost function to decide whether to open it after receiving a request to open it.