311results about How to "Reduce access delay" patented technology

Embodiments of the present invention disclose an information transmission method, a base station and a terminal. The method comprises the steps of configuring, by the base station, subcarrier spacing of at least one synchronization signal and a physical broadcast channel and quantities of symbols occupied by the synchronization signal and the physical broadcast channel, wherein the subcarrier spacing of the synchronization signal is 15*2m kilohertz, the subcarrier spacing of the physical broadcast channel is 15*2n kilohertz, and both m and n are integers less than or equal to 5 and greater than or equal to 0; according to a service delay demand, selecting one configuration for sending the synchronization signal and the physical broadcast channel; determining frequency domain positions and time frequency positions for sending the synchronization signal and the physical broadcast channel, wherein the frequency domain positions sending the synchronization signal and the physical broadcast channel are adjacent or at least some are identical, and the time domain positions sending the synchronization signal and the physical broadcast channel are adjacent or some are identical; and sending the synchronization signal and the physical broadcast channel to the terminal according to the selected configuration and the determined frequency domain positions and the time domain positions. Through adoption of the method, base station and terminal, the time delay for accessing the terminal to the cell is reduced.

This invention relates to a selecting method for up-line random access leading sequences, in which, the lead includes one or multiple ZC root sequences, if a base station needs a ZC root sequence, then the base station with wider covering sphere returns the sequence index with smaller CM value, if the station needs multiple ZC root sequences, then terminals far away from the base station selects the sequence index with smaller CM value or its corresponding expansion sequence.

The invention provides a SDN (Software Defined Network)-based heterogeneous network convergence framework. According to the framework, the core idea of control and data separation in the software defined network is referred, a controller is added in an EPC core network, user identity information is packaged to be a unique user identifier to serve as the identity certificate during the network access and switching process. The concept of the user identifier is used, a method of realizing virtual switching under the control of the controller is brought forward, the switching access process can be theoretically simplified, and network access time delay can then be reduced. After switching, the IP remains unchanged, the time spent on IP layer switching in the case of heterogeneous network switching is saved, the target of reducing the entire switching time delay is achieved, IP address management and user safety management in a mobile environment are facilitated as the IP is maintained, and a feasible solution is provided for solving the problem of seamless switching between the LTE network and the WLAN network.

This invention discloses a random access method, in which access point AP can dynamically adjust the number of random access channels of the next frame according to the condition of network load reflected by the access channels and broadcast through downlink public control channels. When the request for the occurrence of group collision needs repeated access mobile terminal MT, utilizing binary index retreat algorithm, dynamically expends size of competition window, and according to down public control channel published random access channel number, successful access request number and MT service access priority level, real-time refreshes sending probability to reduce repeated collision probability. At circumstance of low or high network load, the invention can increase random access probability of success, and reduce access time delay, and provide better service Qos for high-level user.

The invention relates to a wireless access control method and device for a software defined network (SDN) and belongs to the field of mobile communication technology. According to the method, a controller has wireless access to a control module to obtain the status of a mobile terminal (MT), QoS requirements of the MT, the status of APs and network resource status information according to an access request message of the MT; candidate APs are determined according to factors such as the QoS requirements of the MT and the moving direction, and if multiple candidate APs exist, the AP with the highest signal intensity is selected as a target AP; the target AP accepts / rejects an MT access request. According to the wireless access control method and device for the SDN, the QoS requirements of the MT, status information of the MT and the APs, an SDN architecture and other characteristics are considered comprehensively, MT access control under the wireless SDN architecture is achieved; according to the scheme, the QoS satisfaction degree of the MT is effectively improved, MT access delay is shortened, MT access AP signal stabilization is guaranteed, and network stability is improved.

The invention discloses an active user detection and channel estimation method with adaptive overhead. Using the estimated active user set and the channel thereof, the estimation quality is evaluatedby calculating the received signal error, and the time slot overhead of the pilot frequency in the frame structure can be adaptively adjusted according to the number of active users and the channel environment in the real system, so that the service quality is ensured with the access time delay as low as possible, and super-reliable active user detection and channel estimation are realized. The method also aims at an enhanced mobile broadband scene, large-scale machine type communication and other huge-address communication scenes in a cellular network in the future. According to the method, the pilot signal for broadband uplink unlicensed multiple access is reasonably designed by utilizing the sporadic characteristic of the uplink transmission flow of the user and the sparsity of a large-scale MIMO virtual angle domain channel, and an advanced compressed sensing technology is introduced, so that the access delay of the user can be greatly reduced.

The invention discloses a competitive random access method, a system and an eNB. The method comprises the following steps: the eNB detection initiates user equipment UE of the random access process; when a user detection window detects that a plurality of UEs select same random access resources for initiating random access process simultaneously, random access response messages are not sent to theUEs selecting the same random resources simultaneously; and the UEs initiating the random access process can not receive the random access response messages in a random access response window, the random access resources are reselected, and the random access process is initiated again. The invention can complete the random access process successfully, avoid the uplink resources distributed for colliding UEs from being wasted in the random access response process, and reduce the time delay of random access.

The present invention provides a DRAM / NVM hierarchical heterogeneous memory system with software-hardware cooperative management schemes. In the system, NVM is used as large-capacity main memory, and DRAM is used as a cache to the NVM. Some reserved bits in the data structure of TLB and last-level page table are employed effectively to eliminate hardware costs in the conventional hardware-managed hierarchical memory architecture. The cache management in such a heterogeneous memory system is pushed to the software level. Moreover, the invention is able to reduce memory access latency in case of last-level cache misses. Considering that many applications have relatively poor data locality in big data application environments, the conventional demand-based data fetching policy for DRAM cache can aggravates cache pollution. In the present invention, an utility-based data fetching mechanism is adopted in the DRAM / NVM hierarchical memory system, and it determines whether data in the NVM should be cached in the DRAM according to current DRAM memory utilization and application memory access patterns. It improves the efficiency of the DRAM cache and bandwidth usage between the NVM main memory and the DRAM cache.

The invention relates to the technical field of communication and discloses an access control method and an access point (AP), wherein the access control method comprises the following steps: acquiring the access state of the AP; if the access state reaches the access control threshold, constructing a first beacon frame, wherein the first beacon frame comprises a first service set identifier information unit, and the length cell of the first service set identifier information unit is filled with 0; and sending the first beacon frame. The invention can be used for reducing the access delay of a terminal accessed to the AP under the condition that the network overhead is not increased.

This invention discloses one multi-load wave communication system channel priority lining method, which comprises the following steps: a, when user sends signal channel requirement, the system gets the user resource demands from the said demands; b, the system finds out the load wave to satisfy the user demands as prepare load wave and selects load wave with maximum priority from the prepare ones; c, selecting the time gap with maximum priority from the load wave and redispatching relative codes materials according code dispatching principle to determine the business signal value.

The invention relates to the technical field of wireless communication, and specifically, relates to a method for random access. The method comprises the following steps: user equipment sends a randomaccess signal comprising a leader sequence and payload data, wherein the leader sequence is set randomly or set according to the number of the leader sequences needed to be sent, and the payload datais set according to current service requirements; the user equipment receives a feedback information which is returned by a base station and corresponding to the random access signal, wherein the feedback information at least comprises one of user unique identifier information, timing advance information, uplink transmission authorization information and an acknowledgement ACK signal / unacknowledged NACK signal. Namely, by design of the random access signal which comprises the leader sequence and the payload data, the scheme can realize functions which can be completed by four interactions ina conventional mode just by two interactions, can be adaptive to new requirements in 5G, and for single data transmission, the scheme can reduce access time delay.

The invention discloses a control information transmission method and device. The control information transmission method comprises the steps that a first station sends a wireless signal containing control information, wherein the control information is used for notifying the designated second station in a dormant state to perform one or more operations as follows: state updating, sleep mode switching, releasing of the dormant state and operation after releasing of the dormant state; an auxiliary module of the second station receives and decodes an awakening signal and sends the decoded control information and the identity identification information to a control module; the control module of the second station judges whether the second station is a target second station of the awakening signal according to the identity identification information, and analyzes and completes the operations indicated in the control information.

The invention discloses a forwarding interface building method, and the method comprises the steps that a CU receives an F1 building request message sent by a DU, wherein the F1 building request message comprises one or a combination of the following pieces of information: a DU identification, an information list of a service cell on the DU, the capacity information of the DU and a downlink TEID distributed by the DU for the RRC message transmission; the CU transmits an F1 building response message to the DU, wherein the F1 building response message comprises one or a combination of the following pieces of information: CU identification, a PLMN identification list supported by the CU, a cell configuration list, and an up link TEID which is distributed by the CU for the RRC message transmission. According to the invention, the method can automatically build an interface between the DU and the CU, and reduces the configuration of an operator.

The invention relates to the technical field of the underwater communication, and aims to provide an underwater multi-path communication method based on frequency spectrum perception and prediction, which comprises the following steps: establishing a prediction model on use status information of each channel; predicting the current use state of the channel according to the delay information of the node of a occupied channel; and on the basis, selecting a proper channel to carrying out the communication. The frequency spectrum prediction mechanism provided by invention can enable the node to quickly access to a free channel so as to reduce access delay and improve the communication effect. By establishing the prediction model on use status information of each channel and predicting the current use state of the channel according to the delay information of the node of the occupied channel, the invention reduces data collision probability of multi-path communication, improves data transmission rate and spectrum utilization, saves node energy, and prolongs the cycle of network.

The invention provides a random access method. The method comprises the following steps: transmitting a randomly-selected random access preamble; and receiving a random access response message, and if a conflict indication area in the random access response message indicates that a conflict occurs, ending a current random access process, and retransmitting a randomly-reselected random access preamble; alternatively, if the conflict indication area in the random access response message indicates that the conflict occurs, judging the priority of current random access, and if the priority is high, sending a random access message 3, and continuing the current random access process, otherwise, ending the current random access process, and retransmitting the randomly-reselected random access preamble. Through adoption of the method, the random access delay can be reduced, and the power consumption of user equipment is saved.

The invention relates to the wireless communication field, and discloses a network access method, a system as well as a device to enable the bandwidth requesting efficiency of an AAS CPE to be improved, so as to reduce the access delay. In the invention, a base station sends out a frame which contains a competition window used for competing the bandwidth to the AAS CPE through beams which are formed by a self-adaptive antenna and direct to different directions, and the AAS CPE sends out a bandwidth request to the base station though the competition window when needing to request a bandwidth. If the AAS CPE obtains the requested bandwidth, the access procedure of the network is finished. A timer is arranged in the AAS CPE. When the timer is time out, and the AAS CPE does not obtain the requested bandwidth or obtain the bandwidth smaller than the requested one, the AAS CPE resends out the bandwidth request to the base station through the competition window after random backoff for a certain time, or discards a signal data unit to be sent out.

The invention discloses a method for reducing random access delay on an unauthorized spectrum, belonging to the field of mobile communication technology. The method comprises the following steps: adopting an 'LBT sequential indication' method, ensuring that a base station adopts multi-carrier scheduling for the random access of a terminal, introducing a physical indication signal, enabling eNB to indicate UE to execute the sequence of the LBT for each unauthorized carrier that is configured for random access based on the signaling before the UE performs PRACH transmission to ensure that the UE can access to the channel as soon as possible. As the base station transmits the physical indication signal on a specified idle carrier, the effect of channel reservation can be achieved to a certain extent, and thus the probability of successful first idle carrier sensing of the terminal can be further increased, and the delay of the random access process can be reduced.

The invention provides an access method and a system and user equipment and network side equipment. The method comprises that the user equipment receives first information carrying identification of a second network access point, the second network access point can conduct idle port flow shunting of the current first network of the user equipment, when the first information carries identification of a plurality of second network access points, the user equipment selects one from the multiple second network access points according to first auxiliary information and accesses the selected second network access point. By adoption of the technical scheme, access delay is effectively shortened, access efficiency is improved, and further flow shunting is effectively achieved.

The invention provides a reinforced random access control channel resource allocation method. Information length of E-RUCCH is adjusted according to the physical resources of the PRACH channel; physical resource sharing relation of E-RUCCH and PRACH and transmitting time of FPACHI are defined according to the information length of E-RUCCH; accordingly, PRACH physical resource is made full use of, and wasting of resources is reduced to some extent. By adopting the invention, E-RUCCH information content can be read out in a short time when the information length of E-RUCCH is smaller than the information length of PRACH by defining the fixed E-RUCCH information length, and the access time lag is reduced by comparing the invention with the prior art. In addition, the invention also provides a reinforced random access control channel device to be more applicable for the reinforced random access course of TD-SCDMA system.

The invention discloses a capability acquisition method for a multimode terminal. The method comprises the following steps that a base station transmits a first terminal capability request to the multimode terminal according to the type of a current system to acquire the current system capability of the multimode terminal after receiving an attachment request sent by the multimode terminal; and the base station processes initial attachment initiated by the multimode terminal according to the system capability. According to the method, the multimode terminal can only report the capability of the multimode terminal for the current system in an initial attachment process, so that the number of bytes of a multimode terminal capability reporting message is reduced, the multimode terminal capability reporting message transmission failure rate and retransmission times in the initial attachment process are reduced, and the access time delay of the multimode terminal is further shortened.

The invention discloses a method and a system for randomly accessing a relay station (RS). The method comprises the following steps: a base station selects a non-competitive random access lead code indedicated non-competitive random access lead codes in a concentrating manner, distributes the non-competitive random access lead code to the relay station, sends a downlink signal to the relay station, notifies the distributed non-competitive random access lead code, and receives a non-competitive random access request message which is in uplink transmission by the relay station on an uplink of arandom access channel, wherein, the non-competitive random access request message comprises a non-competitive random access lead code, carries out the random access response on the relay station, andsends a downlink signal of the random access response to the relay station. By the above processing, the invention can avoid the condition that the RS occupies the resources of cell public random access, simplify the process of random access, and reduce access time delay, thus effectively improving the efficiency of the RS random access.

The invention discloses a launching method of random switch-in signal based on single carrier launching and receiving system, which consists of random switch-in signal launching end equipment and receiving end equipment, wherein the random switch-in signal contains switch-in front and ascending random switch-in order, which separate launching signal and bind launching; the switch-in front measures synchronous detection and frequency difference of receiving end equipment; the ascending random switch-in order builds effective connection between launching end equipment and network. The invention can select different connecting patterns of switch-in front and ascending random switch-in order according to different working and channel conditions, which guarantees the switch-in probability in the ascending random switch-in course.

The invention discloses a downlink data transmission method, device and system and relates to the communication technology. The downlink data transmission method includes the steps that when a core network needs to send downlink data, a paging message carrying a downlink data transmission instruction is sent, after an RNC receives the paging message, it can be determined that security activation needs to be conducted, then identifiers of security parameters carried in the paging message and identifiers of user equipment UE are stored, the UE is paged according to UE parameters, security activation is conducted when RRC connection is established, and downlink data transmission is conducted. Therefore, air interface signaling overheads generated for security activation are reduced, access delay generated for security activation is shortened, and the effects that air inference signaling overhead reducing and access delay reducing during downlink data transmission are achieved.

The present invention relates to a user equipment and a radio base station, and to related methods of enabling contention-based uplink transmission. The method comprises the steps of determining (210) configuration information for at least one contention-based uplink transmission opportunity, transmitting (220) the configuration information to at least one user equipment, and for each of the at least one contention-based uplink transmission opportunity, transmitting (230) an access control signal to the at least one user equipment, indicating whether contention-based uplink transmission is allowed for the opportunity.

The invention provides a random access response method and device, a base station and a terminal. The method includes the steps that the terminal sends a random access response message, wherein the MAC PDU (media access control protocol data unit ) of the random access response message includes at least one MAC subPDU (medium access control sub-protocol data unit), and each MAC subPDU includes a MAC sub-head and a possible MAC RAR (media access control random access response) corresponding to the MAC sub-head; when there are at least two MAC subPDUs, at least two MAC sub-PDUs are sequentiallyarranged in the MAC PDU. According to the present invention, the method enables a base station gNB to quickly respond to random access requests from multiple terminals and in multiple demands, and also enables a single terminal UE to quickly receive and parse the response to the random access request sent by the terminal, thereby reducing the time delay of random access, and saving the power of the terminal.

The invention discloses a system and a method for transmitting low interception signals, which are suitable for a high-throughput and delay sensibility wireless network that mainly uses burst service. The system and the method are used for splitting a message group in the traditional group wireless network into a series of even and short data sub-blocks and defusing the grouping conflict into thecollision among a plurality of few sub-blocks by frequency hopping and time hopping two-dimensional pseudo-random modulation, are combined with channel coding with good deletion performance to realize the full-duplex transmission of emission and multi-path reception, not only increases channel utilization rate and network throughput, but also have good anti-interference and low-interception performance; meanwhile, by combining an asynchronous competitive channel access system, the system and the method are not only capable of avoiding a complicated resource scheduling algorithm and reducing channel access time delay, but also can satisfy multi-user access at the same time; finally, the system and the method can slowly reduce the throughput of an overload network, avoid the systemic breakdown caused by overload and increases the network robustness.

The invention provides a method for sending a frequency deviation indicating signal. The method for sending the frequency deviation indicating signal comprises the step that frequency deviation indicating information is sent out by a first node through a wireless channel. The invention further provides a method for generating a random access sequence. The method for generating the random access sequence comprises the steps that after the frequency deviation indicating information sent by the first node is received by a second node, the random access sequence xu, v (n) is generated according to the formula xu, v (n)=xu((n+Cv)mod NZC); different values of Cv are adopted according to different deviated frequencies indicated by the frequency deviation indicating information. The invention further provides a device for sending the frequency deviation indicating signal and a device for generating the random access sequence.

The invention discloses a random access indication method and device and a storage medium, and relates to the technical field of communication. The method comprises the following steps: a serving basestation sends a random access indication signaling, and the random access indication signaling indicates a target antenna panel and / or a target beam for sending a random access lead code to a terminal; and the terminal receives the random access indication signaling, and determines a target antenna panel and / or a target beam for sending the random access preamble according to the random access indication signaling. According to the embodiment of the invention, the random access indication signaling is sent to the terminal through the service base station, so that the terminal can determine the target antenna panel and / or the target beam for sending the random access preamble according to the random access indication signaling; thus, when the terminal has a plurality of antenna panels, theterminal can accurately determine which antenna panel is used to initiate random access, which is helpful for improving the accuracy and success rate of random access and reducing the random access time delay.

The invention discloses a non-orthogonal random access method in a large-scale M2M network based on optimal power backoff, and the method comprises the following steps that 1), a base station increases the ACB factor by the times of an optimal number MTCD 1* and sends the increased ACB factor to all MTCDs, and the MTCD that passes the ACB test sends a first message Msg1 to the base station througha physical random access channel, determines the number of MTCDs that select the same PA, i.e., the number of MTCDs that initiate random access attempts in a current access slot; 2), the base stationsends a second message Msg2 to the MTCDs according to all selected PAs, and the MTCDs monitor the RAR represented by RA-RNTI on the PUSCH (physical downlink control channel); 3), the MTCD capable ofmonitoring the RAR transmits a third message Msg3 according to the selected tag PA, and each MTCD of the same PA achieve the NOMA on the same PUSCH through the multiplexing of the power domain; 4), the base station uses the SIC to decode a data packet on the PUSCH, and sends a fourth message Msg4 to the successfully decoded MTCD. This method can effectively improve the system throughput and reducethe access delay of equipment.