"Beacon Request" power transmission

Manuel Menchaca

Expert 2035 points

Other Parts Discussed in Thread: CC2530, CC2591

Hi, I'm using the ZStack-CC2530-2.5.1 and I have an issue about the power transmission of the device during the association process. My device acts as router in a Smart Energy network.

As I know, I can modify the power transmission with ZMacSetTransmitPower() but when I see the "beacon request" frames with a sniffer, they are send with less power than other frames (application or link status).

Can I increase the transmission power of the "beacon request" frames?

Best regards

over 12 years ago

0 TheDarkSide over 12 years ago

TI__Genius 16570 points

Hi,

the API you are calling is the correct one.

However, it may be that you are calling that API after the device has attempted to associate with a parent.

Just as a test (not suggesting this as final solution), can you please try to change macPibDefaults.phyTransmitPower parameter in mac_pib.c to the desired value and see what happens?

Thanks,

TheDarkSide

0 Manuel Menchaca over 12 years ago in reply to TheDarkSide

Expert 2035 points

Hi,

You're correct!

Firstly, I used the API ZMacSetTransmitPower() in Zmain.c, then I've changed de macPibDefaults in mac_pib.c and everything runs as I want it. Now, the 'beacon requests' are transmitted with the maximun power as the other frames.

Best Regards,

Manuel

0 koutsion over 10 years ago in reply to Manuel Menchaca

Intellectual 985 points

Hello Manuel. I have the same problem and i tried to do what you did. I also had in ZMain.c the ZMacSetTransmitPower(). What i wanted to ask you is what value did you put in the macPibDefaults struct for Tx Power? 0xF5 which is the cc2530 register value for 4.5 dbm OR TX_PWR_PLUS_4 which is the value from the enumeration that is used in ZMacSetTransmitPower?

Thank you in advance,
Nikos

0 Manuel Menchaca over 10 years ago in reply to koutsion

Expert 2035 points

Hi Nikos,

I was using a CC2530 with LNA so I got more Tx Power.

1. In ZMAC.h you can find this values:

typedef enum

{

 TX_PWR_MINUS_22 = -22,

 TX_PWR_MINUS_21,

 TX_PWR_MINUS_20,

 TX_PWR_MINUS_19,

 TX_PWR_MINUS_18,

 TX_PWR_MINUS_17,

 TX_PWR_MINUS_16,

 TX_PWR_MINUS_15,

 TX_PWR_MINUS_14,

 TX_PWR_MINUS_13,

 TX_PWR_MINUS_12,

 TX_PWR_MINUS_11,

 TX_PWR_MINUS_10,

 TX_PWR_MINUS_9,

 TX_PWR_MINUS_8,

 TX_PWR_MINUS_7,

 TX_PWR_MINUS_6,

 TX_PWR_MINUS_5,

 TX_PWR_MINUS_4,

 TX_PWR_MINUS_3,

 TX_PWR_MINUS_2,

 TX_PWR_MINUS_1,

 TX_PWR_ZERO,

 TX_PWR_PLUS_1,

 TX_PWR_PLUS_2,

 TX_PWR_PLUS_3,

 TX_PWR_PLUS_4,

 TX_PWR_PLUS_5,

 TX_PWR_PLUS_6,

 TX_PWR_PLUS_7,

 TX_PWR_PLUS_8,

 TX_PWR_PLUS_9,

 TX_PWR_PLUS_10,

 TX_PWR_PLUS_11,

 TX_PWR_PLUS_12,

 TX_PWR_PLUS_13,

 TX_PWR_PLUS_14,

 TX_PWR_PLUS_15,

 TX_PWR_PLUS_16,

 TX_PWR_PLUS_17,

 TX_PWR_PLUS_18,

 TX_PWR_PLUS_19,

 TX_PWR_PLUS_20

} ZMacTransmitPower_t;  // The transmit power in units of -1 dBm.

2. In mac_pib.c, you can find this:

static CODE const macPib_t macPibDefaults ={

.... 

#if defined (HAL_PA_LNA)

20, /* phyTransmitPower for CC2591 */
#elif defined (HAL_PA_LNA_CC2590)
11, /* phyTransmitPower for CC2590 */
#else
0, /* phyTransmitPower without frontend */
#endif

MAC_CHAN_11, /* logicalChannel */
{0, SADDR_MODE_EXT}, /* extendedAddress */
1, /* altBe */
MAC_BO_NON_BEACON, /* deviceBeaconOrder */
};

In my case, I use 20 dBm (CC2591)

0 koutsion over 10 years ago in reply to koutsion

Intellectual 985 points

Now i saw that the tx power needs to be 3 and below because it is compared with the first element of the array below:

const uint8 CODE macRadioDefsTxPwrBare[] =

{

3, /* tramsmit power level of the first entry */

(uint8)(int8)-22, /* transmit power level of the last entry */

/* 3 dBm */ 0xF5, /* characterized as 4.5 dBm in datasheet */

/* 2 dBm */ 0xE5, /* characterized as 2.5 dBm in datasheet */

/* 1 dBm */ 0xD5, /* characterized as 1 dBm in datasheet */

/* 0 dBm */ 0xD5, /* characterized as 1 dBm in datasheet */

/* -1 dBm */ 0xC5, /* characterized as -0.5 dBm in datasheet */

/* -2 dBm */ 0xB5, /* characterized as -1.5 dBm in datasheet */

/* -3 dBm */ 0xA5, /* characterized as -3 dBm in datasheet */

/* -4 dBm */ 0x95, /* characterized as -4 dBm in datasheet */

/* -5 dBm */ 0x95,

/* -6 dBm */ 0x85, /* characterized as -6 dBm in datasheet */

/* -7 dBm */ 0x85,

/* -8 dBm */ 0x75, /* characterized as -8 dBm in datasheet */

/* -9 dBm */ 0x75,

/* -10 dBm */ 0x65, /* characterized as -10 dBm in datasheet */

/* -11 dBm */ 0x65,

/* -12 dBm */ 0x55, /* characterized as -12 dBm in datasheet */

/* -13 dBm */ 0x55,

/* -14 dBm */ 0x45, /* characterized as -14 dBm in datasheet */

/* -15 dBm */ 0x45,

/* -16 dBm */ 0x35, /* characterized as -16 dBm in datasheet */

/* -17 dBm */ 0x35,

/* -18 dBm */ 0x25, /* characterized as -18 dBm in datasheet */

/* -19 dBm */ 0x25,

/* -20 dBm */ 0x15, /* characterized as -20 dBm in datasheet */

/* -21 dBm */ 0x15,

/* -22 dBm */ 0x05 /* characterized as -22 dBm in datasheet */

};

but i think i don't see a big difference. Any hints?

0 YiKai Chen over 10 years ago in reply to koutsion

Guru 735695 points

You should use TX_PWR_PLUS_4 for 4.5 dbm.

0 koutsion over 10 years ago in reply to Manuel Menchaca

Intellectual 985 points

Hello Manuel!

Now i saw your response and thank you very much.

So i use the values from (1 )for ZMacSetTransmitPower() and the values from (2) for the macpib struct? Is that correct?
Thank you in advance

0 Manuel Menchaca over 10 years ago in reply to koutsion

Expert 2035 points

When I put "20" in macpib struct, it is equivalent to 20 dBm. But yes, you can try vary this value

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"Beacon Request" power transmission