To: Prof. Jason Ellis From: Alpha Barry Date: 10/15/19 Object: 750-Word Expendent Definition of A uplink radio resource allocation scheme for localized SC-FDMA transmission in LTE network

The goal of this paper is the wireless communication and the LTE network on A uplink radio resource allocation scheme for localized SC-FDMA transmission in LTE network. I’m looking to know the meaning of this term: Uplink

(A communication link for transmissions from the earth to a satellite, weather balloon, etc. Frequently attributive.)

Here, the information is paired from a lower to a higher level in the universe as un upward motion.

(transitive. To relay (data or a signal) by means of an uplink. Cf. downlink v.)

In this case, it’s also to layout or send information through the process of upward transmission contrast of downward(downlink).

(The portion of a communications link used for the transmission of signals from an Earth terminal to a satellite or to an airborne platform. An uplink is the converse of a downlink. An uplink or downlink is distinguished from reverse link or forward link.)

In this definition, we see the similarities of the two previous meanings by transferring the information carrier signal from a lower to a higher altitude.

((by analogy, less formally) The communication path from a mobile device to a base station, a consumer to the network backbone, a client device to a server etc.)

We assist at an interdependence between transmitter and receiver for many more subscribers

(Data transmission from a data station to the headend.)

The sending message(information) from a central office to a client or subscriber.

(The transmission from an earth station up to a satellite. Contrast with downlink.)

(The transmission from a cellphone or other mobile device to a cell tower. Contrast with downlink.)

These two definitions are correlated to the previous ones. So, the data is being sent from point A to point B via the network connection.

(An 802.11ax AP must contend for the medium and win a transmit opportunity (TXOP) before multi-user (MU) communications can occur. Once the 802.11ax AP wins a TXOP, it can then coordinate uplink transmissions from 802.11ax clients that support UL-OFDMA.

UL-OFDMA is more complex than DL-OFDMA and may require the use of as many as three trigger frames. Each trigger frame is used to solicit a specific type of response from the Wi-Fi 6 clients. UL-OFDMA also requires the use of buffer status report (BSR) frames from the clients. Clients use BSR frames to inform the AP about the client’s buffered data and about the QoS category of data. The information contained in BSR frames assists the AP in allocating RUs for synchronized uplink transmissions. The AP will use the information gathered from the clients to build uplink window times, client RU allocation, and client power settings for each RU. Buffer status reports (BSRs) can be unsolicited or solicited. If solicited, the AP will poll the clients for BSRs.

once an 802.11ax AP has won a TXOP, the AP will send the first trigger frame. A buffer status report poll (BSRP) frame is used to solicit information from the 802.11ax clients about their need to send uplink data. The clients will then respond with buffer status reports (BSRs). The whole purpose of the buffer status report (BSR) information is so the Wi-Fi 6 clients can assist an 802.11ax AP to allocate uplink multi-user resources. The AP will use this information to decide how to best allocate RUs to the clients for synchronized uplink transmissions.)

Overall of this definition is that before the transport of information as voice or videos through the internet, the electronic devices make a sequence of troubleshooting by using some triggers for buffering the data versus of its quality of services in order to allow the receiver to get access to the content of the signal(information); through a high bandwidth (range of frequencies) spectrum. Which differ from the precedent definition of an uplink.

Some meanings of abbreviated terms from the journal that I picked to keep me on track of abbreviations’ senses

(Long Term Evolution (LTE) network, single carrier frequency division multiple access (SC-FDMA) is applied as the transmission technology for uplink traffic.  However, users may require different quality of services (QoS) for different applications.  The Gale–Shapley algorithm is applied to find the optimal matching between resource blocks (RB) and user equipment (UE) by considering channel conditions and the desired QoS.  This paper modified the Recursive Maximum Expansion (RME) algorithm to effectively assign radio resource for UEs with different bandwidth demands. The performance of our proposed scheme is compared with the modified RME scheme through exhaustive simulations.)

The journal claimed that a sustainable radio source of use receives more attention because of the proliferation of mobile services require quality of services (QoS) and it’s getting more and more mobile devices. The process consists of having some subcarriers to distribute and localize the SC-FDMA.

References

1968   W. M. Griggs AMSS Prototype Radiosonde (Rep. AD-680-409) 4   The radiosonde is designed to perform two functions… As a transponder, it must receive the uplink range tones.

1975   Sci. Amer. June 127/1   Since its launch in late 1972 it has offered a repeater service open to all, with an uplink at two meters and a downlink at 10.

1982   New Scientist 9 Sept. 682/1   These ‘uplink’ signals are at frequencies between 5·9 and 6·4 giga

1975   Phi Delta Kappan 56 540/1   The first educational television programme was uplinked to ATS-6 from Rosman at 9:00am EDT on July 2, 1974.

1991   Omni Apr. 104/2   I can uplink fax transmissions to a satellite, receive telexes, and bring wide-body airplanes screaming out of the sky.

1999   Balloons & Airships Mar. 20/1   The footage was up-linked to a chase aircraft which carried the compatible microwave equipment on board.

2005   Chicago Tribune (Midwest ed.) 9 Oct. i. 23/4   The event..was uplinked to a satellite for use by TV stations around the state.

https://en.wiktionary.org/wiki/uplink

https://www.pcmag.com/encyclopedia/term/53501/uplink

https://blog.aerohive.com/uplink-orthogonal-division-multiple-access-ul-ofdma-in-802-11ax/

Chen, Y., & Ke, S. (2013). A uplink radio resource allocation scheme for localized SC-FDMA transmission in LTE network. Journal of Supercomputing, 66(2), 670–685. https://doi.org/10.1007/s11227-012-0849-8