Method and apparatus for avoiding hidden node interference in a communication network
A communication network and hidden node technology, which is applied in the field of avoiding hidden node interference, can solve the problems of hidden nodes and cannot alleviate hidden nodes, and achieve the effect of improving throughput and spectral efficiency and avoiding the influence of hidden nodes
Active Publication Date: 2019-05-17
ALCATEL LUCENT SAS +1
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Problems solved by technology
Therefore, even if eNB#1 is able to receive uplink messages in the unlicensed band, it cannot do so due to CRS transmission
Thus, CSMA / CA using RTS / CTS mechanism cannot alleviate the hidden node problem if the receiver of eNB#1 cannot tune to the license-exempt frequency band
Similarly, the coexistence of LTE-U and LTE-U can also lead to such hidden node problems
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[0034] In the following detailed description of the preferred embodiment, reference is made to the accompanying drawings which form a part hereof. The accompanying drawings show, by way of example, specific embodiments in which the invention can be practiced. The illustrated embodiments are not intended to be exhaustive of all embodiments in accordance with the invention. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. Accordingly, the following detailed description is not limiting, and the scope of the invention is defined by the appended claims.
[0035] As described above, the present invention provides a solution for solving the hidden node problem between the first base station and other serving nodes by sending busy signaling to the first base station using the license-exempt channel via the designated licensed channel. For example, the first base stat...
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The invention relates to a method and device for avoiding interference of a hidden node in UE, which works in a license-free channel, of the communication network. The method comprises that a request sending signaling is received from a service node, and the request sending signaling comprises an identification of the license-free channel as well as a time period in which a service node is prepared to occupy the license-free channel; according to the identification, first base stations, used nearby, of the license-free channel are identified; if at least one base station exists nearby and is not the service node, a busy signaling is sent to the first base stations via a licensed channel, and asks the first base stations to pause data transmission to the UE in the time period; and a sending allowed signaling is sent to the service node, and asks the service node to transmit data of the UE in the time period in the license-free channel. The invention also relates to a method and device for avoiding interference of the hidden node in the service node of the communication network as well as a method for avoiding interference of the hidden node in the first base station of the communication network.
Description
technical field [0001] The present invention relates to the field of wireless communication, and in particular, the present invention relates to a method and a device for avoiding hidden node interference when the communication network works on an unlicensed channel. Background technique [0002] As business demands increase, operators of cellular networks require more frequency bands in addition to licensed frequency bands. LTE deployments in license-exempt bands (hereafter referred to as "LTE-U"), typically beyond 5 GHz, enable offloading of large volumes of traffic from licensed carriers. The first phase of LTE-U will consist of unlicensed bands for supplemental downlink (SDL) and licensed bands for transmission uplink. Since LET-U operates in a license-exempt frequency band, it will have to co-exist with other networks, especially Wi-Fi (e.g. 802.11ac). [0003] Hidden nodes are a known problem in Wi-Fi. figure 1 Two Wi-Fi access points (Access Point: AP), ie, AP#1 an...
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IPC IPC(8): H04W28/02H04W28/12H04W72/04
Inventor 黄晟锋T·胡韩锋
Owner ALCATEL LUCENT SAS