diff --git a/repository/link.go b/repository/link.go
index fddb41b..4720cc1 100644
--- a/repository/link.go
+++ b/repository/link.go
@@ -141,88 +141,20 @@ func (l *LinkPort) Device() PortedDevice {
 	return l.link
 }
 
-//// DeviceLinkPosition device在link上的位置
-//type DeviceLinkPosition struct {
-//	device   Identity
-//	position LinkPosition
-//}
-//
-//// SlopeLinkSegment Slope在Link上的区间
-//type SlopeLinkSegment struct {
-//	slope *Slope
-//	start *LinkPosition
-//	end   *LinkPosition
-//}
-//
-//func (s *SlopeLinkSegment) Slope() *Slope {
-//	return s.slope
-//}
-//
-//func (s *SlopeLinkSegment) Start() *LinkPosition {
-//	return s.start
-//}
-//
-//func (s *SlopeLinkSegment) End() *LinkPosition {
-//	return s.end
-//}
-//
-//type SectionalCurvatureLinkSegment struct {
-//	sectionalCurvature *SectionalCurvature
-//	start              *LinkPosition
-//	end                *LinkPosition
-//}
-//
-//// LinkNode link节点
-//type LinkNode struct {
-//	Identity
-//	turnout   *Turnout
-//	aRelation LinkPort
-//	bRelation LinkPort
-//	cRelation LinkPort
-//}
-//
-//func (ln LinkNode) ButtonCode() string {
-//	return ln.turnout.ButtonCode()
-//}
-//
-//func (ln LinkNode) PortNum() int {
-//	return 3
-//}
-//
-//func (ln LinkNode) bindDevicePort(port proto.Port, devicePort DevicePort) error {
-//	linkPort, isLinkPort := devicePort.(*LinkPort)
-//	if !isLinkPort {
-//		return errors.New(fmt.Sprintf("Link节点不能与[%s]类型的设备关联", devicePort.Device().Type()))
-//	}
-//	switch port {
-//	case proto.Port_A:
-//		ln.aRelation = *linkPort
-//	case proto.Port_B:
-//		ln.bRelation = *linkPort
-//	case proto.Port_C:
-//		ln.cRelation = *linkPort
-//	default:
-//		return errors.New(fmt.Sprintf("Link节点没有端口[%s]", port))
-//	}
-//	return nil
-//}
-//
-//type LinkNodePort struct {
-//	node *LinkNode
-//	port proto.Port
-//}
-//
-//func NewLinkNodePort(node *LinkNode, port proto.Port) *LinkNodePort {
-//	return &LinkNodePort{
-//		node: node,
-//		port: port,
-//	}
-//}
-//
-//func (lp *LinkNodePort) Port() proto.Port {
-//	return lp.port
-//}
-//
-//func (lp *LinkNodePort) Device() PortedDevice {
-//	return lp.node
-//}
+type LinkRange struct {
+	link  *Link
+	start int64
+	end   int64
+}
+
+func (l *LinkRange) Link() *Link {
+	return l.link
+}
+
+func (l *LinkRange) Start() int64 {
+	return l.start
+}
+
+func (l *LinkRange) End() int64 {
+	return l.end
+}
diff --git a/repository/physical_section.go b/repository/physical_section.go
index dbf45d7..c678309 100644
--- a/repository/physical_section.go
+++ b/repository/physical_section.go
@@ -33,6 +33,8 @@ type PhysicalSection struct {
 	//在Link上的区间（根据aKm和bKm计算出的，start的offset一定小于end的offset）
 	startLinkPosition *LinkPosition
 	endLinkPosition   *LinkPosition
+	//在Link上的区间
+	linkRanges []*LinkRange
 
 	//物理区段所属集中站
 	centralizedStation string
@@ -56,14 +58,6 @@ func (s *PhysicalSection) BLinkPosition() *LinkPosition {
 	return s.bLinkPosition
 }
 
-func (s *PhysicalSection) StartLinkPosition() *LinkPosition {
-	return s.startLinkPosition
-}
-
-func (s *PhysicalSection) EndLinkPosition() *LinkPosition {
-	return s.endLinkPosition
-}
-
 func (s *PhysicalSection) ARelation() DevicePort {
 	return s.aRelation
 }