Description
This LwM2M Object enables monitoring of parameters related to network connectivity. In this general connectivity Object, the Resources are limited to the most general cases common to most network bearers. It is recommended to read the description, which refers to relevant standard development organizations (e.g. 3GPP, IEEE). The goal of the Connectivity Monitoring Object is to carry information reflecting the more up to date values of the current connection for monitoring purposes. Resources such as Link Quality, Radio Signal Strength, Cell ID are retrieved during connected mode at least for cellular networks.
Object definition
| Name | Object ID | Object Version | LWM2M Version |
| Connectivity Monitoring | 4 | 1.2 | 1.1 |
| Object URN | Instances | Mandatory | |
| urn:oma:lwm2m:oma:4:1.2 | Single | Optional | |
Resource definitions
| ID | Name | Operations | Instances | Mandatory | Type | Range or Enumeration | Units | Description |
|---|---|---|---|---|---|---|---|---|
| 0 | Network Bearer | R | Single | Mandatory | Integer | 0..50 | Indicates the network bearer used for the current LwM2M communication session from the network bearer list below. The number range is split into three categories: 0 - 20 are Cellular Bearers 21 - 40 are Wireless Bearers 41 - 50 are Wireline Bearers More specifically: 0: GSM cellular network 1: TD-SCDMA cellular network 2: WCDMA cellular network 3: CDMA2000 cellular network 4: WiMAX cellular network 5: LTE-TDD cellular network 6: LTE-FDD cellular network 7: NB-IoT 8 - 20: Reserved for other types of cellular network 21: WLAN network 22: Bluetooth network 23: IEEE 802.15.4 network 24 - 40: Reserved for other types of local wireless network 41: Ethernet 42: DSL 43: PLC 44 - 50: reserved for other types of wireline networks. | |
| 1 | Available Network Bearer | R | Multiple | Mandatory | Integer | 0..50 | Indicates a list of current available network bearer. Each Resource Instance has a value from the network bearer list. | |
| 2 | Radio Signal Strength | R | Single | Mandatory | Integer | Indicates the average value of the received signal strength indication used in the current network bearer (as indicated by Resource 0 of this Object). The value is expressed in dBm. For the following network bearers the signal strength parameters indicated below are represented by this resource: GSM: RSSI UMTS: RSCP LTE: RSRP NB-IoT: NRSRP For more details on Network Measurement Report, refer to the appropriate Cellular or Wireless Network standards, (e.g. for LTE Cellular Network refer to 3GPP TS 36.133 specification). | ||
| 3 | Link Quality | R | Single | Optional | Integer | This contains received link quality e.g. LQI for IEEE 802.15.4 (range 0...255), RxQual Downlink for GSM (range 0...7, refer to [3GPP 44.018] for more details on Network Measurement Report encoding), RSRQ for LTE, (refer to [3GPP 36.214]), NRSRQ for NB-IoT (refer to [3GPP 36.214]). | ||
| 4 | IP Addresses | R | Multiple | Mandatory | String | The IP addresses assigned to the connectivity interface. (e.g. IPv4, IPv6, etc.) | ||
| 5 | Router IP Addresses | R | Multiple | Optional | String | The IP address of the next-hop IP router, on each of the interfaces specified in resource 4 (IP Addresses). Note: This IP Address doesn't indicate the Server IP address. | ||
| 6 | Link Utilization | R | Single | Optional | Integer | 0..100 | /100 | The percentage indicating the average utilization of the link to the next-hop IP router. |
| 7 | APN | R | Multiple | Optional | String | Access Point Name in case Network Bearer Resource is a Cellular Network. | ||
| 8 | Cell ID | R | Single | Optional | Integer | Serving Cell ID in case Network Bearer Resource is a Cellular Network. As specified in TS [3GPP 23.003] and in [3GPP. 24.008]. Range (0...65535) in GSM/EDGE UTRAN Cell ID has a length of 28 bits. Cell Identity in WCDMA/TD-SCDMA. Range: (0...268435455). LTE Cell ID has a length of 28 bits. Parameter definitions in [3GPP 25.331]. | ||
| 9 | SMNC | R | Single | Optional | Integer | 0..999 | Serving Mobile Network Code. This is applicable when the Network Bearer Resource value is referring to a cellular network. As specified in TS [3GPP 23.003]. | |
| 10 | SMCC | R | Single | Optional | Integer | 0..999 | Serving Mobile Country Code. This is applicable when the Network Bearer Resource value is referring to a cellular network. As specified in TS [3GPP 23.003]. | |
| 11 | SignalSNR | R | Single | Optional | Integer | dB | SINR: Signal to Interference plus Noise Ratio SINR is the ratio of the strength of the received signal to the strength of the received interference signal (noise and interference). | |
| 12 | LAC | R | Single | Optional | Integer | Location Area Code in case Network Bearer Resource is a Cellular Network. As specified in TS [3GPP 23.003] and in [3GPP. 24.008] |