861results about How to "Reduce signaling overhead" patented technology

A multi-hop wireless, for example cellular, communications system is provided comprising a source equipment which may be one of a base station or an end user terminal for transmitting signals towards a destination equipment which may be the other of a base station or an end user terminal via at least one relay equipment. The relay equipment receives a plurality of signals transmitted from one or more source equipments of the system and from this plurality of signals selects a signal to relay. In this way the decision about which relays are included in which communication paths in the system is distributed to the relay equipments of the system, thus reducing the signalling overhead as compared with link state protocols which are typically used for routing in such multi-hop systems.

Apparatus and methods for improving the throughput and capacity of a wireless communications network. In one embodiment, this improvement is accomplished by focusing upon reduction of the co-channel interference, including the interferences that are unpredictable or undetectable to a traditional network. Various implementations detect the receiver interference (i.e. the interference affecting the receiver performance) at the transmitting node in order to avoid or reduce its effect at the receiving node. This detection can be as simple as e.g., spectral sensing constituting power measurement, and/or can be more sophisticated such as measurements including bandwidth, duty cycle and statistical behavior of the unwanted signal.

A method and apparatus for controlling an uplink data rate, without increasing downlink signaling overhead, in a mobile communication system that supports an uplink packet data service. A Node B transmits an Absolute grants (AG) using one of first and second IDs to a User Equipment (UE). Upon receipt of an AG with the first UE-ID, the UE transmits uplink data within an allowed maximum data rate indicated by the AG and receives a Relative Rrant (RG) in the next Transmission Time Interval (TTI). Upon receipt of an AG with the second UE-ID, the UE does not receive an RG.

A method and apparatus for transmitting and receiving downlink control information in a mobile communication system supporting an uplink packet data service are provided. To transmit packet data in an HARQ mobile communication system, a second transceiver receives an RG as rate control information from a first transceiver. The second transceiver sets the allowed maximum data rate of an HARQ process to which the RG is applied to the allowed maximum data rate of an HARQ process previous to the HARQ process, if the RG indicates hold. The second transceiver transmits packet data within the set allowed maximum data rate to the first transceiver.

The invention relates to a method for tracking locations of mobile terminals in a communication network. Further, the invention relates to a communication network and apparatuses therein capable of performing individual steps of the method according to different embodiments of the invention. To decrease the signaling load imposed by mobility related signaling the invention suggests to group mobile terminals in so called mobility groups and to reduce the signaling overhead by performing a location update on a per-mobility group basis. In one exemplary embodiment of the invention this is realized by only one of the mobile terminals in a mobility group sending a group location update on behalf of the group to trigger the location update for the mobility group. Alternatively, in another embodiment of the invention, a network operator trusted or controlled entity sends a group location update on behalf of the group to trigger the location update for the mobility group.

A method and apparatus for transmitting and receiving CQI in a wireless communication system are provided, in which when a UE transitions from a continuous reception state to a DRX state, CQI report resources are reallocated to the UE according to a CQI report resource reallocation rule agreed between the UE and an E-RAN, which obviates the need for signaling information about allocated new CQI report resources.

A method of simultaneously transmitting and receiving multiple data packets over wireless channels among the nodes of a wireless network is provided. The method includes automatically selecting a master sending node and corresponding master receiving node in response to an omni-directionally transmitted request to send during a contention period. The method also includes selecting a slave sending node and corresponding slave receiving node if a spatial reuse ratio correspond to the master-node pair is less than a predetermined threshold and if directional data transmissions between the slave sending node and corresponding slave receiving node avoid interfering with directional data transmissions between the master nodes and other pairs of slave nodes. The method further includes causing the master sending node and slave sending node to directionally transmit data packets during a coordination period.

The invention discloses an open-loop MIMO method based on direction of arrival, a base station and user equipment, which are used in the technical field of wireless transmission. The method comprises the following steps that: the user equipment is divided into low-speed, middle-speed and high-speed user equipment according to the moving speed of the user equipment; the low-speed user equipment is set to adopt a closed-loop MIMO mode, and the middle-speed and high-speed user equipment is set to adopt an open-loop MIMO mode; then a sending end measures the direction of arrival of a feedback link, and estimates a precoding matrix index number of a sending link according to the direction of arrival obtained through the measurement; a rank of an MIMO system is decided; an MIMO sending mode is decided according to the rank and the precoding matrix index number; then the MIMO mode and the rank are sent to a receiving end; the receiving end intercepts the MIMO mode and the rank; and finally, the receiving end performs feedback according to intercepted information. The invention aims at the middle-speed and high-speed user equipment to provide an open-loop MIMO system and an open-loop MIMO device based on the direction of arrival, and has the characteristics of simple design and good system performance.

A method and apparatus for performing a handover procedure in a wireless communication system including a mobile relay node is provided. A target evolved NodeB (eNB) receives a handover request message containing a list of a plurality of user equipments (UEs) on the mobile relay node or a group handover indication. The target eNB performs an admission control for the plurality of UEs; and transmits a handover request acknowledge message containing a list of admitted UEs for handover among the plurality of UEs.

The present document provides a terminal access method, system and a terminal. The method includes: a terminal downloading from an Internet server and storing a network cloud chart containing cell related information, which includes a terminal common air interface configuration parameter of a cell, wherein the terminal common air interface configuration parameter and/or a cell broadcast message includes a first uplink pilot frequency for intelligent access; performing a random access procedure, wherein the first uplink pilot frequency is sent if the network cloud chart stored by the terminal includes the cell related information of the cell to be accessed and the cell related information is valid, otherwise a second uplink pilot frequency for non-intelligent access is sent; and performing a parameter configuration procedure, wherein terminal common air interface configuration corresponding to the terminal common air interface configuration parameter is not performed if the terminal sends the first uplink pilot frequency.

Methods and apparatus are provided to enable aperiodic sounding reference signaling including frequency hopping through the use of additional RRC configuration. The methods can require little or no additional L1 overhead to support narrowband frequency hopping for aperiodic sounding transmissions. In some embodiments, an approach is provided for extending an LTE periodic sounding reference signal methodology to include aperiodic sounding. One benefit of the proposed technique is that it enables each UE to perform aperiodic channel sounding in sounding subframes, using a frequency-hopping pattern, in which the sounding bandwidth of the UE can be narrowed appropriately to match its link capability. Additional benefits of the new approach include better resource utilization, lower signaling overhead, faster channel information update rates, and lower blocking probabilities.

The invention discloses a D2D resource allocation method based on multi-agent deep reinforcement learning, and belongs to the field of wireless communication. The method comprises the following steps:firstly, constructing a heterogeneous network model of a cellular network and D2D communication shared spectrum; establishing a signal to interference plus noise ratio (SINR) of a D2D receiving userand an SINR of a cellular user based on the existing interference, respectively calculating unit bandwidth communication rates of a cellular link and a D2D link, and constructing a D2D resource allocation optimization model in a heterogeneous network by taking the maximum system capacity as an optimization target; For the time slot t, constructing a deep reinforcement learning model of each D2D communication pair on the basis of the D2D resource allocation optimization model; And respectively extracting respective state feature vectors from each D2D communication pair in the subsequent time slot, and inputting the state feature vectors into the trained deep reinforcement learning model to obtain a resource allocation scheme of each D2D communication pair. According to the invention, spectrum allocation and transmission power are optimized, the system capacity is maximized, and a low-complexity resource allocation algorithm is provided.

Embodiments of the present invention disclose a method of implicit detachment and related system and device. The method comprises: the first device receives a request message that carries implicit detachment indication from the second device; and the first device performs implicit detachment or restores the second device to original status according to the indication. Embodiments herein further disclose a system and device for implicit detachment. In embodiments herein, implicit detachment process is triggered through MRT expiry information.

A method and an apparatus for transmitting a small size data packet efficiently while reducing signaling overhead in a mobile communication system are provided. The method includes determining to apply a low security transfer procedure, transmitting, to a base station, a Radio Resource Control (RRC) connection request message including a temporary Data Radio Bearer (DRB) request to which Access Stratum (AS) security is not applied, receiving an RRC connection setup message, including a temporary DRB configuration, from the base station, and transmitting an Internet Protocol (IP) packet over the temporary DRB.

The present invention relates to a wireless communication system, and more particularly, to a method of transmitting feedback, by which a signaling overhead can be efficiently reduced. In receiving a group feedback by a transmitting end in a wireless communication system, the present invention includes transmitting at least one data unit to a receiving end during a prescribed time interval and receiving a group feedback indicating a presence or non-presence of error for the overall at least one data unit from the receiving end. Accordingly, a transmitting/receiving end of a communication system transceives a group feedback for multiple feedbacks indicating an error presence or non-presence of overall data received in TTI, thereby reducing a signaling overhead.