diff --git a/internal/logic/domain/device/device_service.go b/internal/logic/domain/device/device_service.go
index 32283ed..81518df 100644
--- a/internal/logic/domain/device/device_service.go
+++ b/internal/logic/domain/device/device_service.go
@@ -2,6 +2,12 @@ package device
 
 import (
 	"context"
+	"errors"
+	"fmt"
+	"gim/internal/business/comm/utils"
+	"gim/pkg/db"
+	"gim/pkg/gerrors"
+	"gim/pkg/grpclib"
 	"gim/pkg/logger"
 	"gim/pkg/pb"
 	"gim/pkg/rpc"
@@ -14,6 +20,11 @@ type deviceService struct{}
 
 var DeviceService = new(deviceService)
 
+const (
+	SignInKey    = "%s:gim_sign_in:%s" // 占位符： masterId， key的第一个字母
+	SignInExpire = 30 * time.Second
+)
+
 // Register 注册设备
 func (*deviceService) Register(ctx context.Context, device *Device) error {
 	err := DeviceDao.Save(device)
@@ -26,6 +37,18 @@ func (*deviceService) Register(ctx context.Context, device *Device) error {
 
 // SignIn 长连接登录
 func (*deviceService) SignIn(ctx context.Context, userId, deviceId int64, token string, connAddr string, clientAddr string) error {
+	//TODO::限制操作
+	masterId, _ := grpclib.GetCtxMasterId(ctx)
+	cacheKey := fmt.Sprintf(SignInKey, masterId, utils.Int64ToStr(userId))
+	if db.RedisUtil.Exists(cacheKey) {
+		return errors.New("限频！！！")
+	} else {
+		err := db.RedisUtil.Set(SignInKey, "already", SignInExpire)
+		if err != nil {
+			return gerrors.WrapError(err)
+		}
+	}
+
 	_, err := rpc.GetBusinessIntClient().Auth(ctx, &pb.AuthReq{UserId: userId, DeviceId: deviceId, Token: token})
 	if err != nil {
 		return err