what is the upper bound of the radio receiver can stay on?

RE: what is the upper bound of the radio receiver can stay on?

Stian Røed Hafskjold — Wed, 13 Mar 2019 12:37:38 GMT

The RX turns on to receive either a SCAN_REQ or a CONNECT_REQ.

If no packet is received the radio will turn off again after 60 µs. This is the time it needs to be on in order to be sure that it has not received the preamble (8 bit = 8 µs) and the Access address (32 µs), which would generate the address received event from the RADIO peripheral, plus some extra time to adjust for the active clock accuracy and the range delay.

If the radio receives a SCAN_REQ or CONNECT_REQ it will be on for the time it takes to receive 176 bits or 336 bits respectively plus any extra time to adjust for the active clock accuracy and the range delay. So between 200 and 350 µs approximately.

RE: what is the upper bound of the radio receiver can stay on?

neochinese — Mon, 11 Mar 2019 22:42:56 GMT

any update on the question?

RE: what is the upper bound of the radio receiver can stay on?

neochinese — Fri, 08 Mar 2019 15:32:50 GMT

Hi Jared,

I think the receiver is for receiving SCAN_REQ in this case. Here is our adv configuration. How should we deduce the upper bound of the receiver on-time? The measured upper bound is bigger than the theoretical time needed to receive SCAN_REQ. Is the upper bound actually the time to receive the maximum PDU in theory?

By the way, here is the parameters of ADV.

m_adv_params.primary_phy     = BLE_GAP_PHY_1MBPS;
    m_adv_params.duration        = BLE_GAP_ADV_TIMEOUT_GENERAL_UNLIMITED;
    m_adv_params.properties.type = BLE_GAP_ADV_TYPE_CONNECTABLE_SCANNABLE_UNDIRECTED;
    m_adv_params.p_peer_addr     = NULL;
    m_adv_params.filter_policy   = BLE_GAP_ADV_FP_ANY;
    m_adv_params.interval        = BLE_GAP_ADV_INTERVAL_MAX;

RE: what is the upper bound of the radio receiver can stay on?

Jared — Fri, 08 Mar 2019 14:59:32 GMT

Hi,

This is not specified and would probably depend on the advertising parameters. You can read more about the states of the receiver here.

Best regards

Jared