BatteryLifeExtension 是什么模式？哪里有详细介绍？

在协调器建立网络的时候，调用函数

ZStatus_t NLME_NetworkFormationRequest( uint16 PanId,

                                                                                  uint32 ScanChannels,

                                                                                  byte ScanDuration,

                                                                                 byte BeaconOrder,

                                                                                 byte SuperframeOrder,

                                                                                 byte BatteryLifeExtension );

z-stack API对最后一个参数BatteryLifeExtention的介绍：

If this value is TRUE, the NWK layer will request that the ZigBee coordinator is started supporting battery life extension mode ( see [R3] for details on this mode ).

但是请问，这个[R3] datasheet在哪啊？BatteryLifeExtention模式到底起什么作用了？我测了一下功耗，当设置为true时，功耗也没降低啊。

没人知道吗？哪位大神帮忙解答一下啊？能不能从这一点上进一步降低功耗啊？

这个是IEEE802.15.4里面的提到的东西

请下载附件中的IEEE802.15.4的文档6622.802.15.4-2006.pdf

http://e2e.ti.com/support/wireless_connectivity/f/158/p/60366/216024.aspx#216024 

谢谢！