ISO/IEC 16504:2011 情報技術—システム間の電気通信と情報交換—TVホワイトスペースでの運用のためのMACとPHY | ページ 2

4.1

alien beacon group

group of devices for which the beacon period (BP) is not aligned with the BP of the current device

4.2

alien device

member of an alien beacon group

4.3

Access Category

AC

common set of prioritized contention access (PCA) parameters to contend for the medium to transmit MAC protocol data units (MPDUs) with certain priorities

4.4

beacon group

bg

set of devices that share the same beacon period start time (BPST)

4.5

beacon period

BP

time during which a device sends or listens for beacons

4.6

beacon period start time

BPST

start of the beacon period

4.7

channel reservation protocol

CRP

protocol to support negotiation and maintenance of channel time reservations

4.8

contention signalling window

time window for exchanging control or management information in the slotted aloha based manner

4.9

data integrity

assurance that the data has not been modified from its original form

4.10

data transfer period

DTP

time period within a superframe used mainly for data transfer via prioritized contention access (PCA) or in reservations established using the channel reservation protocol (CRP)

4.11

device

entity conforming to this International Standard

4.12

extended beacon group

union of a device’s beacon group and the beacon groups of all devices in the device’s beacon group

4.13

incumbents

regulatory protected transmission systems operating in the TV bands

4.14

incumbent protection mechanisms

mechanisms including DFS, TPC, geo-location/database access, and spectrum sensing

4.15

MPDU

MAC PDU

4.16

MSDU

MAC SDU

4.17

master

master device

device acting as a centralized coordinator of medium access on behalf of at least one slave device

4.18

master-slave group

group of devices with a master device and its slave devices

4.19

message integrity code

MIC

cryptographic checksum generated using a symmetric key

Note 1 to entry: A MIC is typically appended to data for data integrity and source authentication similar to a digital signature.

4.20

neighbour

member of a beacon group

4.21

network allocation vector

NAV

remaining time a neighbour device has indicated it will access the medium

4.22

outband channel

channel other than the one being used for data transmission

4.23

peer

peer device

device coordinating medium access with other devices without a centralized coordinator

4.24

peer-to-peer group

group of peer devices

4.25

prioritized contention access

PCA

prioritized CSMA/CA access mechanism

4.26

proxy

peer device that coordinates outband channel measurement

4.27

quiet period

time period scheduled to detect incumbents

4.28

reservation

one or more medium access slots (MASs) within a superframe during which a device has preferential access to the medium

4.29

reservation signalling window

time window used for exchanging control or management information in the reservation based manner

4.30

slave

slave device

device associated with and coordinated by a master device for medium access

4.31

stream

logical flow of MSDUs from one device to one or more other devices

4.32

superframe

periodic time interval to coordinate frame transmissions between devices

4.33

transmission opportunity

TXOP

time interval for prioritized contention access (PCA) to initiate transmissions

4.34

TXOP holder

device that has successfully contended for a TXOP