diff --git a/source/6LoWPAN/ws/ws_neighbour_class.h b/source/6LoWPAN/ws/ws_neighbour_class.h
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+/*
+ * Copyright (c) 2018, Arm Limited and affiliates.
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef WS_NEIGHBOUR_CLASS_H_
+#define WS_NEIGHBOUR_CLASS_H_
+
+/**
+ * Neighbour Channel hopping information
+ */
+typedef struct ws_fhss_s {
+    uint32_t        utt_timestamp;          /*!< Timestamp from MAC for Unicast time UTT-IE */
+    uint32_t        bt_timestamp;           /*!< Timestamp from MAC for Broadcast time BT-IE */
+    uint32_t        broadcast_interval;
+    uint32_t        ufsi;                   /*!< Unicast Fractional Sequence Interval 24-bit */
+    uint32_t        bti;                    /*!< Broadcast Interval_offset 24-bit */
+    uint16_t        broadcast_slot_number;  /*!< Broadcast Slot number */
+    uint16_t        bsi;                    /*!< Broadcast schedule identifier */
+    uint8_t         broadcast_dwell;
+    uint8_t         unicast_dwell;
+    unsigned        channel_function:3;
+} ws_fhss_t;
+
+
+typedef struct ws_neighbour_class_entry_s {
+    ws_fhss_t   fhhs_data;
+} ws_neighbour_class_entry_t;
+
+/**
+ * Neighbour hopping info data base
+ */
+typedef struct ws_neighbour_class_s {
+    ws_neighbour_class_entry_t *neigh_info_list;          /*!< Allocated hopping info array*/
+    uint8_t list_size;                                    /*!< List size*/
+} ws_neighbour_class_t;
+
+/**
+ * ws_neighbour_class_alloc a function for allocate giving list size
+ *
+ * \param class_data pointer to structure which will be initialized by this function
+ * \param list_size define list size
+ *
+ * \return true Allocate Ok
+ * \return false Allocate Fail
+ *
+ */
+bool ws_neighbour_class_alloc(ws_neighbour_class_t *class_data, uint8_t list_size);
+
+/**
+ * ws_neighbour_class_dealloc a function for free allocated neighbor hopping info
+ *
+ * \param class_data pointer to structure which will be initialized by this function
+ *
+ */
+void ws_neighbour_class_dealloc(ws_neighbour_class_t *class_data);
+
+/**
+ * ws_neighbour_class_entry_get a function for search hopping info for giving neighbor attribut
+ *
+ * \param class_data pointer to structure which will be initialized by this function
+ * \param attribute_index define pointer to storage info
+ *
+ * \return NULL when Attribute is not correct
+ * \return Pointer to neighbor hopping info
+ *
+ */
+ws_neighbour_class_entry_t * ws_neighbour_class_entry_get(ws_neighbour_class_t *class_data, uint8_t attribute_index);
+/**
+ * ws_neighbour_class_entry_remove a function for clean information should be call when neighbor is removed
+ *
+ * \param class_data pointer to structure which will be initialized by this function
+ * \param attribute_index define pointer to storage info
+ *
+ */
+void ws_neighbour_class_entry_remove(ws_neighbour_class_t *class_data, uint8_t attribute_index);
+
+#endif /* WS_NEIGHBOUR_CLASS_H_ */