A method for multiple access data packet transmission
A transmission method and data packet technology, applied in the field of multiple access mobile communications, can solve problems such as redundant signaling interaction, and achieve the effects of reducing signaling interaction, reducing transmission delay, and improving detection capabilities
Active Publication Date: 2020-04-28
TSINGHUA UNIV
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Problems solved by technology
If the data volume of the user's single communication is very small, the signaling interaction of the existing multiple access process will be lengthy
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[0018] The implementation of the present invention will be described in detail below in conjunction with the drawings and examples.
[0019] A kind of multiple access data packet transmission method of the present invention, refer to figure 1 , the user sends the preamble and data in a competitive manner in the pre-allocated time-frequency resources, and a data packet transmission can be completed without signaling interaction between the user and the base station.
[0020] The invention transmits the preamble sequence and data at the same time, the preamble sequence adopts non-orthogonal pilot sequence to generate more sequences to support more users, the pilot symbol adopts traditional amplitude modulation or phase modulation, and the data symbol code modulation adopts any A resolvable multiple access method, including but not limited to sparse code multiple access (Sparse Code Multiple Access, SCMA), non-orthogonal multiple access (Non-Orthogonal Multiple Access, NOMA), int...
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The invention discloses a multiple access data packet transmission method, leader sequence and data are sent simultaneously, pilot frequencies used for user detection are concentratedly allocated in one coherent time frequency resource block, the pilot frequencies used for user channel estimation are scattered in different coherent time frequency resource blocks, and thus, an optimization method of continuously sending the leader sequence and data based on combination and separating user detection and channel estimation is realized. The method reduces signaling interaction between the user anda base station in a random access process and consequently reduces data transmission delay, based on the method of separating active user detection and channel estimation, a high-accuracy channel response value can be obtained, and pilot frequency overhead is relatively low. Thus, the method provided by the invention can reduce data transmission delay, can obtain high-accuracy channel response value under the condition of relatively low pilot frequency overhead, and consequently provides a good foundation for data demodulation.
Description
technical field [0001] The invention belongs to the field of multiple access mobile communication technologies, and in particular relates to a multiple access data packet transmission method. Background technique [0002] A multiple access (Multiple Access, MA) scheme can enable multiple users to use a shared communication channel at the same time. In the field of mobile communication, before sending useful data, users usually send a preamble (Preamble) for uplink synchronization and application for uplink resources, and then receive random access response signaling sent by the base station. In the current LTE network, during the random access process, four signaling interactions between the user and the base station are required to establish a connection. After the random access process, normal data transmission between the user and the base station begins. If the amount of data in a single communication of a user is small, the signaling interaction in the existing multipl...
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IPC IPC(8): H04L5/00H04L25/02
CPCH04L5/0048H04L25/0224
Inventor 张秀军肖立民周世东王玉锋
Owner TSINGHUA UNIV