A data retransmission system and method and mobile terminal
A technology for data retransmission and data transmission, applied in the field of data transmission, can solve problems such as affecting the transmission of PDU data packets, and achieve the effects of avoiding waste of air interface resources, low implementation cost, and simple implementation.
Active Publication Date: 2019-07-05
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology
[0005] According to the problems existing in the prior art, a data retransmission system and method and a mobile terminal are now provided, aiming to solve the problem of affecting the transmission of PDU data packets between the user side and the network side caused by the change of the working mode
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[0058] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0059] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0060] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.
[0061] In the prior art, due to changes in the communication environment of the mobile terminal, it may switch con...
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The invention discloses a data retransmission system, a data retransmission method and a mobile terminal, and belongs to the technical field of data transmission. The system comprises a user side and a network side, the user side is connected with the network side through a communication network, and data is transmitted between the two sides in an AM transmission mode. The user side includes a retransmission unit, a first judgment unit and a first resetting unit. The method comprises the following steps: the user side judges whether there is a need to retransmit a PDU data packet, and retransmits a PDU data packet; the user side judges whether the retransmitted PDU data packet can be identified by the network side according to a reply message returned by the network side; and the user side directly performs transmission resetting according to the judgment result, and requests the network side to perform corresponding transmission resetting in order to start retransmitting a PDU data packet. The technical scheme has the following beneficial effects: the number of times of invalid data transmission is reduced, and the efficiency of data transmission is improved; waste of air interface resources is avoided; and the technical scheme is simple to implement and low in cost of implementation.
Description
technical field [0001] The present invention relates to the technical field of data transmission, in particular to a data retransmission system and method and a mobile terminal. Background technique [0002] In the prior art, the protocol data unit (Protocol data unit, PDU) transmitted between the user side and the network side usually has a header extension type field (Header Extension Type, HE), that is, a field located on the header of the PDU data packet. [0003] Generally speaking, the HE field is a field with 2 bits, which can represent four data types: 00, 01, 10 and 11. Each data type can be used to represent a specific state of subsequent PDU data packets. For example, 00 indicates that the subsequent connection is PDU data, or 10 indicates that the subsequent connection is a complete PDU data packet including the header, etc. [0004] However, when the user side (such as a mobile terminal) performs connection handover between different network sides (such as bas...
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IPC IPC(8): H04L1/16
Inventor 贺元才夏少华
Owner SPREADTRUM COMM (SHANGHAI) CO LTD