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Data processing method and apparatus
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A data processing and data packet technology, applied to electrical components, error prevention/detection through transmission repetition, transmission system, etc., can solve problems such as high overhead and functional redundancy
Active Publication Date: 2018-01-16
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology
[0010] The shortcomings of the existing technology are: the functions of each layer in the layer 2 protocol have a certain degree of repetition, redundant functions, and high overhead
Method used
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Embodiment 1
[0166] This embodiment describes the specific implementation of the L2high layer sender in UM mode.
[0167] The UM mode is a non-confirmation mode, which means that the receiving end of the L2high layer does not send a status report for receiving data, and there is no retransmission of the sending end.
[0168] For the UM mode, the data sending process of the L2high layer at the sending end can be roughly as follows:
[0169] 1: The L2high layer sender receives the data from its upper layer and stores it as an SDU of the L2high layer in the send cache; whether to store it in the send cache is optional, and the SDU can be directly processed or cached for subsequent processing.
[0170] 2: The L2high layer first allocates SNs to high-level SDUs. For example, a specific implementation method can be: the initial value of the serial number of SN is 0, and each SDU is allocated one by one, and the length of SN is configurable. For example, it is configured as 10bit, 15bit, 18bit, ...
Embodiment 2
[0186] This embodiment describes the specific implementation of the L2low layer sender in UM mode.
[0187] The data sending process of the L2low layer at the sending end can be roughly as follows:
[0188] 1: Receive data from the L2high layer and store it in the sending buffer.
[0189] 2: The transmission layer 2 processing may further include: segmenting and concatenating the sending data packets before passing them to the physical layer.
[0190] Specifically, grouping may be performed according to the size of the scheduled transmission resources, including segmentation and concatenation of the same L2high layer data, or concatenation of different L2high layer data.
[0191] Here, each L2low layer can be implemented in at least the following two ways:
[0192] The first method: when segmenting and concatenating, the sending data packet is identified to identify the logical channel from which it comes.
[0193] Further, it may also be that the SN is used for identificat...
Embodiment 3
[0207] This embodiment describes the specific implementation of the L2low layer receiving end in UM mode.
[0208] For the UM mode, the process of the L2low layer at the receiving end can be roughly as follows:
[0209] The L2low layer receives data packets from the physical layer and unpacks the data packets:
[0210] First, parse out different logical channel data packets, and process the data packets of different logical channels separately. If the L2low layer is implemented in two sublayers, the operation of dismantling the logical channel packets is performed by the L2low layer2, and then each A logical channel data packet is sent to the corresponding L2low layer1 sublayer for processing;
[0211] That is, in the UM mode, the transmission layer 2 processing may be processed by the first sub-layer protocol entity and the second sub-layer protocol entity, where the first sub-layer protocol entity receives the second sub-layer protocol entity The second sublayer protocol e...
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Abstract
The invention discloses a data processing method and apparatus. The method comprises steps: on a sending end, a sent data packet transmitted from a higher layer is received, and transport-layer layer-1 processing which comprises assigning a sequence number is carried out on the received sent data packet; transport-layer layer-2 processing which comprises transferring the sent data packet to a physical layer and then sending the sent data packet through an air interface according to the size of a transmission resource obtained by means of scheduling is carried out; on a reception end, the datapacket which is received from the air interface and then transmitted by the physical layer is received; transport-layer layer-2 processing which comprises transmitting the data packet transmitted by the physical layer to the transport-layer layer-2 to perform processing is carried out on the received data packet; and transport-layer layer-1 processing which comprises performing a reordering operation according to the SN to enable the received data packet to recover into the sent data packet is carried out, wherein the sent data packet is a data packet to be sent by the sending end. Thus, datacan be efficiently transmitted, thereby improving the data transmission efficiency and reducing the delay, and improving the system efficiency and the user experience.
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