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Group communication-based relay communication method under off-network direct communication in TD-LTE (time division long term evolution)
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A technology of group communication and off-network direct connection, which is applied in wireless communication, electrical components, synchronization devices, etc., and can solve problems such as inability to realize communication
Active Publication Date: 2013-08-14
HARBIN INST OF TECH
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[0002] At present, in a group (group) that does not exist in a base station area, because not all nodes in the group are all within the communication range, the following communication cannot be realized: 1: Multipoint notification of point-to-multipoint sessions in the group Hop transmission; 2. Multi-hop transmission of point-to-multipoint information within a group
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specific Embodiment approach 1
[0037] The specific embodiment one, the relay communication method based on group communication under off-network direct communication in TD-LTE, it is characterized in that:
[0038] Each group includes N-level user groups, N is a positive integer; there is a 5ms delay between the i+1-th level user group and the i-th level user group; i is a positive integer and i is less than N; the first-level user group Including user A who initiated the information;
[0039] Each user group includes M users, and the users in each user group can communicate with each other; M is an integer greater than 2;
[0040] There are Z relay users between adjacent two-level user groups; Z is a positive integer;
[0041] In TD-LTE, the relay communication method based on group communication under off-network direct connection is realized by the following steps:
[0042] Step A1, initiating information User A monitors the PSCH channel, looking for idle continuous bandwidth;
[0043] Step A2, Initia...
specific Embodiment approach 2
[0086] Specific embodiment two, the following selected specific parameters illustrate the present invention:
[0087] Area information: There is a group in the area without a base station, consisting of A, B, C, D, E, F, G, H, I, J, K, L, and the communication range between nodes is as follows figure 1 Shown:
[0088] Such as figure 1 As shown, in this area, ABCDE is within the communication range of each other, BCFG is within the communication range of each other, EHI is within the communication range of each other, and FJKL is within the communication range of each other.
[0089] Solution flow: See the following for the communication and relay workflow, A initiates notification to send voice information (key: other information is also available, because they are all sent in the form of subframes), the time correspondence of subframes at all levels of nodes status as figure 2 Shown:
[0090] In the above case (A sends voice information), ABCDE belongs to the first level...
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Abstract
A group communication-based relay communication method under off-network direct communication in TD-LTE (time division long term evolution) relates to a group communication-based relay communicating method under off-network direct communication, aims at realizing the multi-jump transmission of conversation notices from one point to multiple points in the group in a non-base station area and the information multi-jump transmission from one point to multiple points in the group. The method comprises the steps of enabling an information sending user A to send front guide information to a PRACH channel; enabling Z first relay users to monitor the PRACH channel, receiving the front guide information, performing synchronous decoding on the information, forwarding to the PRACH channel, and then forwarding to a to-be-occupied continuous wideband; enabling Z next level relay users to monitor the PRACH channel, receiving the front guide information forwarded by the Z first relay users, performing synchronous decoding on the information, forwarding to the PRACH channel and then forwarding to the to-be-occupied continuous wideband; and repeatedly executing the forwarding process until all target users receive the to-be-sent information. The multi-group communication-based relay communication method under off-network direct communication in TD-LTE is suitable for the relay communication group communication-based relay communication under off-network direct communication in TD-LTE.
Description
technical field [0001] The invention relates to a relay communication method based on group communication under off-network direct communication. Background technique [0002] At present, in a group (group) that exists in an area without a base station, because not all nodes in the group are all within the communication range, the following communication cannot be realized: 1: Multipoint notification of point-to-multipoint sessions in the group hop transmission; 2. Multi-hop transmission of point-to-multipoint information within a group. Contents of the invention [0003] The present invention is to realize multi-hop transmission of point-to-multipoint session notification in a group without a base station; A relay communication method based on group communication. [0004] A relay communication method based on group communication under off-network direct communication in TD-LTE, [0005] Each group includes N-level user groups, N is a positive integer; there is a 5ms d...
Claims
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