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Method for sending uplink scheduling authorization, device and base station
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A technology for dispatching authorization and sending methods, which is applied in the field of communication, and can solve problems such as failure, inability of terminals and base stations to transmit data, and inability of terminals to know data transmission, so as to avoid invalid retransmissions, improve transmission efficiency and transmission success rate Effect
Inactive Publication Date: 2012-11-28
ZTE CORP
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[0013] In view of the fact that after the first data transmission is abnormal in the related art, since the uplink scheduling grant does not carry the MCS in subsequent retransmissions, the terminal cannot know which MCS to use for data transmission, resulting in the inability to perform data transmission between the terminal and the base station The present invention is proposed because of the problem of failure of or data transmission. Therefore, the present invention aims to provide a method and device for sending an uplink grant, and a base station including the device
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Embodiment 1
[0055] Embodiment 1: Adaptive way
[0056] Assuming that the benchmark NDI is 0, the content of sending new data is A, where, Figure 5 A schematic diagram of the uplink grant sending process in this embodiment is given.
[0057] The first first pass of new data A. The base station sends an uplink grant, that is, Figure 5 in the first uplink grant. In this uplink grant, NDI plus 1 is 1, RV is 0, and MCS is 4. The first uplink grant is lost, or the uplink data sent by the terminal after receiving the uplink grant is lost, so that the base station cannot receive any uplink data.
[0058] The second first pass of new data A. The base station judges that the initial transmission is abnormal, adds 1 to NDI, and performs the second initial transmission of new data, that is, the second initial transmission of new data A. It can be seen that the operations of the first initial transmission and the second initial transmission The data objects are the same data, both are A, that ...
Embodiment 2
[0062] Embodiment 2: Non-adaptive way
[0063] Assume that the base NDI is 0, and the inside of sending new data is B. Figure 6 A schematic diagram of the implementation process of the present invention in this example is given.
[0064] First pass of new data B. The base station sends an uplink grant, that is, Figure 6 The first uplink grant in . In this uplink grant, NDI plus 1 is 1, RV is 0, and MCS is 4. It is assumed that the first uplink grant is lost or the uplink data sent by the terminal after receiving the uplink grant is lost, so that the base station cannot receive any uplink data.
[0065] The second initial pass of the new data B. The base station adds 1 to the NDI to perform the second initial transmission of the new data, that is, the second initial transmission of the new data B. The new data of the second initial transmission is logically the "next new data", but its content is consistent with the content of the "new data" sent by the previous initial...
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Abstract
The invention discloses a method for sending an uplink scheduling authorization, a device and a base station provided with the device. The method comprises the following steps: setting a new data indicator for indicating new data, wherein the new data indicator occupies one bit; performing first transmission treatment for sending the uplink authorization to a terminal, and in the first transmission treatment, performing plus 1 operation on the new data indicator, and carrying the new data indicator after performing the plus 1 operation, redundancy version information and modulation coding scheme information in the uplink authorization; and under the condition of abnormal first transmission of the new data corresponding to the uplink authorization, using the new data indicator after performing the plus 1 operation as the new data indicator needing the plus 1 operation, and re-performing the first transmission treatment. Through the method, the device and the base station, the terminal can know the information on an MCS adopted in the process of performing uplink data transmission, so that invalid retransmission is avoided and the transmission efficiency and the transmission successrate are improved.
Description
technical field [0001] The present invention relates to the field of communications, in particular to a method and device for sending an uplink scheduling grant, and a base station with the device. Background technique [0002] In the field of communications, uplink scheduling means that on the uplink, the base station can use the PDCCH (Physical Downlink Control Channel, physical downlink control channel, referred to as the physical downlink control channel) scrambled with the temporary identifier of the terminal-specific wireless network at each transmission time interval. PDCCH) allocates resources for the terminal. When the terminal is capable of downlink reception, it needs to monitor the PDCCH all the time in order to obtain possible allocated uplink transmission resources for it. Wherein, the PDCCH that allocates resources for the uplink is also called an uplink grant (Uplink grant, ie UL grant). [0003] The uplink authorization includes physical resource blocks an...
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