Zte Corporation

Huawei Technologies Co., Limited

Sangfor Networks Company Limited

Yan Lin

Xiuyong Shen

Chuming Chen

A method includes sequentially performing analog frequency conversion operations on a first digital frequency conversion signal and a second digital frequency conversion signal based on local oscillator signals at a same frequency, where the first digital frequency conversion signal corresponds to a first sounding reference signal (SRS) to be transmitted on a first carrier, and the second digital frequency conversion signal corresponds to a second SRS to be transmitted on a second carrier, transmitting the first SRS on the first carrier during a first time period, and transmitting the second SRS on the second carrier during a second time period, where the second time period is later than the first time period.

Sounding reference signal sending method and related apparatus

The present disclosure discloses a method for processing a trunking communication service. The method includes the following steps that: a user equipment receives a trunking communication service request message sent by a trunking core network device, the trunking communication service request message including a service type identifier (); and the user equipment determines whether to receive the trunking communication service according to the service type identifier (). The present disclosure also discloses another method for processing a trunking communication service, core network device, user equipment and a storage medium.

Trunking communication service processing method, core network device, UE and storage medium

A method and system for requesting a Physical PMCH are provided. The method includes: user equipment determines a target cell to be immigrated which is adjacent to a cell where the user equipment is located; and if the user equipment judges that a preconfigured Multicast Broadcast Single Frequency Network (MBSFN) area in the adjacent target cell does not comprise the MBSFN area used by the Multimedia Broadcast Multicast Service (MBMS) service/group call currently received by the user equipment, the user equipment requests a network side equipment to allocate a PMCH for the currently received MBMS service/group call. According to the technical solution provided in the present invention, the service continuity of the PTT communication user in a receiving state during the moving process is implemented.

Method and system for requesting physical multicast channel

An encryption realization method and system are disclosed. The method includes: a network-side device and a group call terminal maintaining the same list of push-to-talk (PTT) authentication key K values respectively; during each group call, the network-side device calculating an authentication vector (AV) according to a generated random number (RAND), an authentication sequence number (SQN), a PTT authentication key K value selected from the list of PTT authentication key K values and public network authentication functions; and according to the RAND and an authentication token (AUTN) in the AV acquired from the network-side device, the group call terminal performing authentication to generate an cipher key (CK). With the method and system according to the embodiments of the present invention, the encryption of the PTT system based on the security mechanism of the public network can be achieved, and drawbacks in the related that that the encryption of the PTT system depends on the private encryption algorithm which has a low intensity, the key is transmitted via an air interface, and the replacement of the key is not in time are solved, thereby largely improving the security of the PTT system.

Encryption realization method and system

In a method for allocating resources for a group call in a cluster system, when a group call is initiated, as cluster server counts the number of terminals under all MBSFN areas allocated and pre-allocated by each MCE for the group call, according to information about MBSFN areas allocated and pre-allocated by each MCE for the group call; when the group call is ongoing, re-counts the number of the terminals under all MBSFN areas allocated and pre-allocated by each MCE for the group call; upon determining that the number of the terminals under an MBSFN area changes from zero to non-zero, initiates a process of allocating resources for the group call under the MBSFN area; and upon determining that the number of the terminals under an MBSFN area changes from non-zero to zero, initiates a process of releasing resources allocated for the group call under the MBSFN area.

Method and apparatus for allocating resources for group call in cluster system

The present invention relates to a method, apparatus and system for accessing remote files, wherein the method for accessing remote files comprising the following steps: obtaining download operation information for downloading a file in an operational system server; redirecting the download operation to a file server with safety space; saving a real copy of the downloaded file in the safety space and enumerating a corresponding virtual copy in the safety space. In the present invention, local file operations are redirected to the network file operations of network file storage system by redirecting the download operation on the file in the operational system server to the file server instead of being saved in the local user terminal to realize the 'Not to local' effect for the key file. Even when it is power-off and then restarted, the data will not be saved in the local user terminal to achieve an effect close to 'physical-like isolation', which solves the safety problems of the offline key file much better.

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Shenzhen, China

Yan Lin