本文件介绍了卫星频道LAPSat的链路访问程序（LAP）。LAPSat的目的是使用卫星（Sat）信道，通过GMR-1网络无线电接口在三层实体之间传输信息。LAPSat是用于在GMR-1网络中的移动地球站（MES）和网关站（GS）之间发送传输信号的协议。为LAPSat定义的大多数程序严格遵循为全球移动通信系统（GSM）使用的LAPDm定义的程序。参考相应的GSM技术规范（GSM 04。 05[7]）在本文件中进行了说明。这里只描述了移动D（Dm）和卫星（Sat）信道的LAPs之间的显著差异。本文件基于GSM 04.05[7]。

The present document introduces the link access procedures (LAP) for the satellite channel called LAPSat. The purpose of LAPSat is to carry information between the Layer 3 entities across the GeoMobile (GMR-1) network radio interface using the satellite (Sat) channel. LAPSat is the protocol used for signalling a transfer between a Mobile Earth Station (MES) and a gateway station (GS) in a GMR-1 network.Most of the procedures defined for LAPSat closely follow those defined for the LAPDm used by Global System for Mobile (GSM). References to the corresponding GSM technical specifications (GSM 04.05 [7]) are made within the present document. Only the significant differences between the LAPs for the mobile D (Dm) and Satellite (Sat) channels are described here.The present document is based on GSM 04.05 [7].