diff --git a/proto/src/cg_repo.proto b/proto/src/cg_repo.proto
index 6c76f68..647bdbc 100644
--- a/proto/src/cg_repo.proto
+++ b/proto/src/cg_repo.proto
@@ -463,9 +463,9 @@ message Lamp {
 
 // 设备电子元件组合
 message DeviceEcc {
-    // 设备类型
+    // 模型类型
     Model.Type deviceType = 1;
-    // 设备编号
+    // 模型编号
     string deviceCode = 2;
     // 电子元件组合
     repeated Ecc ecc = 3;
diff --git a/repo/idmapping_build.go b/repo/idmapping_build.go
index 9980f40..a390ace 100644
--- a/repo/idmapping_build.go
+++ b/repo/idmapping_build.go
@@ -7,7 +7,6 @@ import (
 	"strings"
 
 	"joylink.club/rtsssimulation/repo/dto"
-	"joylink.club/rtsssimulation/repo/model"
 )
 
 // 城轨uid
@@ -58,10 +57,10 @@ type idMap struct {
 	// 元素id
 	Eid uint32
 	// 唯一id
-	Uid model.Uid
+	Uid *CgUid
 }
 
-func NewIdMap(did string, eid uint32, uid model.Uid) *idMap {
+func NewIdMap(did string, eid uint32, uid *CgUid) *idMap {
 	return &idMap{
 		Did: did,
 		Eid: eid,
diff --git a/repo/model/api.go b/repo/model/api.go
deleted file mode 100644
index d564aaa..0000000
--- a/repo/model/api.go
+++ /dev/null
@@ -1,57 +0,0 @@
-package model
-
-type ModelType string
-
-const (
-	// 车站
-	MT_Station ModelType = "Station"
-	// 站台
-	MT_Stand ModelType = "Stand"
-	// 屏蔽门
-	MT_PSD ModelType = "PSD"
-	// Link
-	MT_Link ModelType = "Link"
-	// 区段
-	MT_Section ModelType = "Section"
-	// 道岔
-	MT_Turnout ModelType = "Turnout"
-	// 信号机
-	MT_Signal ModelType = "Signal"
-	// 应答器
-	MT_Balise ModelType = "Balise"
-)
-
-type Uid interface {
-	Id() string
-	// 设备原始编号
-	Code() string
-}
-
-// 模型接口
-type Model interface {
-	// Unique id,唯一id
-	Uid() Uid
-	// 模型类型
-	Type() ModelType
-}
-
-// Link
-type Link interface {
-	Model
-}
-
-// 物理区段(实际检测区段,一般区段两端点,道岔区段为3-4个端点)
-type PhysicalSection interface {
-	Model
-	Code() string
-}
-
-// 道岔
-type Turnout interface {
-	Model
-}
-
-// 关联的端口关系
-type AssociatedPort interface {
-	Port() string
-}
diff --git a/repo/model/common.go b/repo/model/common.go
new file mode 100644
index 0000000..a766c75
--- /dev/null
+++ b/repo/model/common.go
@@ -0,0 +1,34 @@
+package model
+
+type ModelType string
+
+const (
+	// 车站
+	ModelType_Station ModelType = "Station"
+	// 站台
+	ModelType_Stand ModelType = "Stand"
+	// 屏蔽门
+	ModelType_PSD ModelType = "PSD"
+	// Link
+	ModelType_Link ModelType = "Link"
+	// 区段
+	ModelType_Section ModelType = "Section"
+	// 道岔
+	ModelType_Turnout ModelType = "Turnout"
+	// 信号机
+	ModelType_Signal ModelType = "Signal"
+	// 应答器
+	ModelType_Balise ModelType = "Balise"
+)
+
+type Uid interface {
+	Id() string
+}
+
+// 模型接口
+type Model interface {
+	// Unique id,唯一id
+	Uid() Uid
+	// 模型类型
+	Type() ModelType
+}
diff --git a/repo/model/impl/link.go b/repo/model/impl/link.go
index 872d6fa..6ad6a9c 100644
--- a/repo/model/impl/link.go
+++ b/repo/model/impl/link.go
@@ -35,7 +35,7 @@ func (l *Link) Uid() string {
 }
 
 func (l *Link) Type() model.ModelType {
-	return model.MT_Link
+	return model.ModelType_Link
 }
 
 // link偏移
diff --git a/repo/model/impl/physical_section.go b/repo/model/impl/physical_section.go
index cbc2d97..32d8072 100644
--- a/repo/model/impl/physical_section.go
+++ b/repo/model/impl/physical_section.go
@@ -25,7 +25,7 @@ func (s *PhysicalSection) Uid() string {
 }
 
 func (s *PhysicalSection) Type() model.ModelType {
-	return model.MT_Section
+	return model.ModelType_Section
 }
 
 func (s *PhysicalSection) Code() string {
diff --git a/repo/model/link.go b/repo/model/link.go
new file mode 100644
index 0000000..9e84047
--- /dev/null
+++ b/repo/model/link.go
@@ -0,0 +1,141 @@
+package model
+
+import "log/slog"
+
+// link端口
+type Link_Port int
+
+const (
+	LinkPort_A Link_Port = -1
+	LinkPort_B Link_Port = 1
+)
+
+// Link
+type Link interface {
+	Model
+	// Link总长度
+	Length() int64
+	// 获取端口A关联的道岔
+	GetPaTurnout() Turnout
+	// 获取端口B关联的道岔
+	GetPbTurnout() Turnout
+	// 下一个link及端口
+	// port - 当前link端口
+	// tpos - 当前道岔位置
+	Next(port Link_Port, tpos TurnoutPosition) *LinkPort
+}
+
+type LinkPort struct {
+	link Link
+	port Link_Port
+}
+
+func NewLinkPort(link Link, port Link_Port) *LinkPort {
+	return &LinkPort{
+		link: link,
+		port: port,
+	}
+}
+
+// link偏移位置
+// 默认linkA端口偏移为0，从A到B为增大，从B到A为减小
+type LinkOffset struct {
+	link   Link
+	offset int64 // 偏移坐标,link相当于一个一维坐标系,以端口A为原点
+}
+
+// 创建link偏移位置,若offset超出link长度则返回nil
+func NewLinkOffset(link Link, offset int64) *LinkOffset {
+	if offset < 0 || offset > link.Length() {
+		return nil
+	}
+	return &LinkOffset{
+		link:   link,
+		offset: offset,
+	}
+}
+
+func (l *LinkOffset) Link() Link {
+	return l.link
+}
+func (l *LinkOffset) Offset() int64 {
+	return l.offset
+}
+
+// link偏移范围
+type LinkRange struct {
+	link  Link
+	start int64
+	end   int64
+}
+
+func NewLinkRange(link Link, a int64, b int64) *LinkRange {
+	if a < 0 || a > link.Length() {
+		slog.Error("创建link偏移范围失败: 超出link长度范围", slog.Int64("a", a))
+		return nil
+	} else if b < 0 || b > link.Length() {
+		slog.Error("创建link偏移范围失败: 超出link长度范围", slog.Int64("b", b))
+		return nil
+	}
+	var start int64
+	var end int64
+	if a > b {
+		start = b
+		end = a
+	} else {
+		start = a
+		end = b
+	}
+	return &LinkRange{
+		link:  link,
+		start: start,
+		end:   end,
+	}
+}
+
+// 是否相交
+func (l *LinkRange) IsIntersect(other *LinkRange) bool {
+	if l.link != other.link {
+		return false
+	}
+	if l.start > other.end || other.start > l.end {
+		return false
+	}
+	return true
+}
+
+// 是否相交
+func (l *LinkRange) IsIntersect2(a, b int64) bool {
+	var start int64
+	var end int64
+	if a > b {
+		start = b
+		end = a
+	} else {
+		start = a
+		end = b
+	}
+	if start > l.end || end < l.start {
+		return false
+	}
+	return true
+}
+
+// 是否在范围内
+func (l *LinkRange) IsInRange(lo *LinkOffset) bool {
+	if lo.link != l.link {
+		return false
+	}
+	if lo.offset < l.start || lo.offset > l.end {
+		return false
+	}
+	return true
+}
+
+// 偏移坐标是否在范围内
+func (l *LinkRange) IsInRange2(offset int64) bool {
+	if offset < l.start || offset > l.end {
+		return false
+	}
+	return true
+}
diff --git a/repo/model/section.go b/repo/model/section.go
new file mode 100644
index 0000000..93ca2fc
--- /dev/null
+++ b/repo/model/section.go
@@ -0,0 +1,9 @@
+package model
+
+// 物理区段(实际检测区段)
+type PhysicalSection interface {
+	Model
+	Code() string
+	// 所在Link范围
+	LinkRanges() []*LinkRange
+}
diff --git a/repo/model/station.go b/repo/model/station.go
new file mode 100644
index 0000000..21b6b52
--- /dev/null
+++ b/repo/model/station.go
@@ -0,0 +1,10 @@
+package model
+
+// 车站
+type Station interface {
+	Model
+	// 车站名
+	Name() string
+	// 是否设备集中站
+	IsEcs() bool
+}
diff --git a/repo/model/turnout.go b/repo/model/turnout.go
new file mode 100644
index 0000000..10a4dd8
--- /dev/null
+++ b/repo/model/turnout.go
@@ -0,0 +1,32 @@
+package model
+
+// 道岔位置
+type TurnoutPosition int
+
+const (
+	// 失表
+	TPos_Lost TurnoutPosition = 0
+	// 定位
+	TPos_DW TurnoutPosition = 1
+	// 反位
+	TPos_FW TurnoutPosition = 2
+)
+
+type Turnout_Port int
+
+const (
+	TurnoutPort_A Turnout_Port = 0
+	TurnoutPort_B Turnout_Port = 1
+	TurnoutPort_C Turnout_Port = 2
+)
+
+// 道岔
+type Turnout interface {
+	Model
+	// 获取A方向连接的link端口
+	GetALinkPort() *LinkPort
+	// 获取B方向连接的link端口
+	GetBLinkPort() *LinkPort
+	// 获取C方向连接的link端口
+	GetCLinkPort() *LinkPort
+}