Data transmission method and user equipment
A data transmission method and user equipment technology, applied in the field of data transmission methods and user equipment, capable of solving problems such as channel idling, reduction of uplink spectrum utilization efficiency, and channel occupation by Wi-Fi nodes
Active Publication Date: 2021-03-30
HUAWEI TECH CO LTD
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Problems solved by technology
[0006] Due to NR (New Radio) ULUE frequency division multiplexing, UEs scheduled to different interlace resources in the same cell may transmit in the same subframe, and the backoff duration of different UEs may be different. If data is sent immediately after backoff, the backoff has not yet ended Due to the use of full bandwidth CCA detection, the UE may be blocked by the UE sending data, resulting in the failure of uplink data transmission and the waste of spectrum resources
If the data is sent at the same starting position of the symbol, the UE that ends the backoff first may have a channel idle before sending the data, and it is easy to be seized by the Wi-Fi node, resulting in failure to access the channel even though the detection is successful
Therefore, the full-bandwidth LBT and CCA mechanisms are not conducive to frequency division multiplexing of uplink UEs, which may greatly reduce the utilization efficiency of uplink spectrum and increase uplink communication delay
Method used
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[0054] The description and claims of the present application and the terms "first", "second", "third", "fourth", etc. in the above drawings are used to distinguish similar objects without Describe a specific order or intern order. It is to be understood that the data such as use can be interchanged in appropriate, so as to be described herein in addition to the content shown or described herein. Moreover, the terms "including" and "having" and any variations are intended to cover non-rowing, such as process, methods, systems, products, or equipment that contain a series of steps or units, including a series of steps or units, are not necessarily limited to clearly listed. These steps or units may include other steps or units that are not clearly listed or for these processes, methods, products, or equipment.
[0055] Such as figure 2 As shown, it shows a network architecture diagram according to an embodiment of the present application. In this network architecture, a base statio...
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Embodiments of the present application provide a data sending method and user equipment. The data sending method of the embodiment of the present application includes: the user equipment determines the narrowband time-frequency resource scheduled by the base station; the user equipment performs idle channel assessment CCA channel detection on the narrowband time-frequency resource to obtain the narrowband time-frequency The channel energy value of the resource; the user equipment judges whether the channel energy value is less than a preset energy threshold; if the channel energy value is less than the preset energy threshold, the user equipment is on the narrowband time-frequency resource Send uplink data to the base station. The base station schedules narrowband time-frequency resources for the user equipment, so that the user equipment sends uplink data on the narrowband time-frequency resources. Different user equipment may transmit data on different narrowband time-frequency resources. By performing CCA channel detection on narrowband time-frequency resources, the chances of user equipment accessing channels can be increased, and the utilization rate of uplink time-frequency resources can be increased. .
Description
[0001] The present application claims China Patent Office, the application number is 2017101094777.7, and the invention is "a data transmission method and device of LAA-NR," all of which is incorporated herein by reference. This application is in this application. Technical field [0002] The present application relates to the field of communications, and more particularly to a data transmission method and a user equipment. Background technique [0003] In ELAA, in order to protect the LTE base station with Wi-Fi AP-friendly coexistence, the ELAA system uses LBT, CCA-ED, discontinuous transmission such as 802.11 system. The distribution of uplink resources in the ELAA system must follow the minimum percentage of each sending node specified in ETSI, so the 3GPP specifies the UE's uplink resource allocation will use Interlace. [0004] Taking 20 MHz bandwidth as an example, 100 RB (Resource Block, resource block) is divided into 10 groups of Interlace, 10 RBs per group, evenly distr...
Claims
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Login to View More IPC IPC(8): H04W74/08
CPCH04W74/0808H04L5/0053H04W72/0446H04W72/0453H04W72/23
Inventor 李晓翠徐凯
Owner HUAWEI TECH CO LTD