參數(shù)資料
型號: STLC2411
廠商: 意法半導(dǎo)體
英文描述: BLUETOOTH BASEBAND
中文描述: 藍(lán)牙基帶
文件頁數(shù): 16/25頁
文件大?。?/td> 216K
代理商: STLC2411
STLC2411
16/25
tooth voice communication while an intensive WLAN communication is ongoing.
Several algorithms have been implemented in order to provide a maximum of flexibility and efficiency for
the priority handling. Those algorithms can be activated via specific HCI commands.
The combination of a time division multiplexing techniques to share the bandwidth in case of simultaneous
operations and of the priority mechanism avoid the interference due to packet collision and it allows the
maximization of the 2.4 GHz ISM bandwidth usage for both devices while preserving the quality of some
critical types of link.
7.12.2 Algorithm 2: WLAN master
In case the STLC2411 has to cooperate, in a collocated scenario, with a WLAN chip not supporting a PTA
based algorithm, it's possible to put in place a simpler mechanism.
The interface is reduced to 1 line:
When the WLAN has to operate, it alerts HIGH the RF_NOT_ALLOWED signal and the STLC2411 will
not operate while this signals stays HIGH.
This mechanism permits to avoid packet collision in order to make an efficient use of the bandwidth but
cannot provide guaranteed quality over the Bluetooth links.
7.12.3 Algorithm 3: Bluetooth master
This algorithm represents the symmetrical case of section 7.12.2. Also in this case the interface is reduced
to 1 line:
When the STLC2411 has to operate it alerts HIGH the RF_NOT_ALLOWED signal and the WLAN will not
operate while this signals stays HIGH.
This mechanism permits to avoid packet collision in order to make an efficient use of the bandwidth, it pro-
vides high quality for all Bluetooth links but cannot provide guaranteed quality over the WLAN links.
7.12.4 Algorithm 4: Two-wire mechanism
Based on algorithm 2 and 3, the Host decides, on a case-by-case basis, whether WLAN or Bluetooth is
master.
7.12.5 Algorithm 5: Alternating Wireless Medium Access (AWMA)
AWMA utilizes a portion of the WLAN beacon interval for Bluetooth operations. From a timing perspective,
the medium assignment alternates between usage following WLAN procedures and usage following Blue-
tooth procedures.
The timing synchronization between the WLAN and the STLC2411 is done by the HW signal
MEDIUM_FREE.
STLC2411
WLAN
RF_NOT_ALLOWED
STLC2411
WLAN
RF_NOT_ALLOWED
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