SYSTEM AND METHOD FOR CONTROLLING WLAN AND BLUETOOTH COMMUNICATIONS
This disclosure involves methods and systems for controlling WLAN and Bluetooth communications by allocating bandwidth into times blocs having a first segment with Bluetooth priority and a second segment with WLAN priority. Access to the wireless communication medium is signaled over an interface connecting the WLAN and Bluetooth modules. Downlink traffic is modulated by signaling the WLAN access point to buffer traffic during the first segment. WLAN traffic can also be modulated by allowing reception and blocking transmission WLAN signals during the first segment. Further, while high priority Bluetooth transmission are preferably always allowed, low priority Bluetooth transmission can be restricted during the second period, depending upon the respective states of the WLAN and Bluetooth modules. A coexistence agent can be used to transfer relevant information between the WLAN and Bluetooth modules.
1 . A method for controlling WLAN and Bluetooth communications comprising the steps of:
a) providing a device having a WLAN module with a hardware portion, a Bluetooth module with a hardware portion, and a packet traffic interface between the WLAN hardware portion and the Bluetooth hardware portion;
b) dividing available communication bandwidth into time blocs;
c) allocating bandwidth in a time bloc into a first segment and a second segment;
d) assigning priority to Bluetooth communication for the first segment and assigning priority to WLAN communication for the second segment; and
e) signaling wireless access to the Bluetooth hardware portion through the interface during the first segment.
2 . The method of claim 1 , further comprising the step of modulating WLAN communication by signaling a WLAN access point to buffer transmission during the first segment.
3 . The method of claim 2 , wherein signaling the WLAN access point to buffer transmission comprises sending a power save signal.
4 . The method of claim 1 , further comprising the step of modulating WLAN communication by allowing reception of WLAN signals and blocking transmission of WLAN signals during the first segment.
5 . The method of claim 1 , wherein the step of allocating bandwidth is based upon information regarding Bluetooth links.
6 . The method of claim 1 , wherein the step of allocating bandwidth is based upon the state of the WLAN module and Bluetooth module.
7 . The method of claim 1 , further comprising the step of signaling wireless access to the Bluetooth hardware portion through the interface during the second segment so that high priority Bluetooth transmissions are allowed.
8 . The method of claim 7 , wherein the step of signaling wireless access to the Bluetooth hardware portion through the interface during the second segment does not allow low priority Bluetooth transmissions.
9 . The method of claim 7 , wherein the step of signaling wireless access to the Bluetooth hardware portion through the interface during the second segment allows low priority Bluetooth transmissions.
10 . The method of claim 1 , further comprising the step of transferring information between a software portion of the WLAN module and a software portion of the Bluetooth module with a coexistence agent.
11 . The method of claim 10 , wherein the information transferred by the coexistence agent is selected from the group consisting of information about the WLAN configuration state and information about the number and type of Bluetooth links.
12 . An apparatus for controlling WLAN and Bluetooth communications including a device having a WLAN module with a hardware and software portion, a Bluetooth module with a hardware portion, and an packet traffic interface between the WLAN hardware portion and the Bluetooth hardware portion, wherein the WLAN software portion is configured to divide available communication bandwidth into time blocs, allocate bandwidth in a time bloc into a first segment and a second segment, assign priority to Bluetooth communication for the first segment and assign priority to WLAN communication for the second segment, and signal wireless access to the Bluetooth hardware portion over the interface during the first segment.
13 . The apparatus of claim 12 , wherein the WLAN software portion is further configured to modulate WLAN by signaling a WLAN access point to buffer transmission during the first segment.
14 . The apparatus of claim 13 , wherein the WLAN software portion signals the WLAN access point to buffer transmission by sending a power save signal.
15 . The apparatus of claim 12 , WLAN software portion is configured to modulate WLAN communication by allowing reception of WLAN signals and blocking transmission of WLAN signals during the first segment.
16 . The apparatus of claim 12 , wherein the WLAN software portion allocates bandwidth based upon information regarding Bluetooth links.
17 . The apparatus of claim 12 , wherein the WLAN software portion allocates bandwidth based upon the state of the WLAN module and Bluetooth module.
18 . The apparatus of claim 12 , wherein the WLAN software portion is further configured to signal wireless access to the Bluetooth hardware portion over the interface during the second segment so that high priority Bluetooth transmissions are allowed.
19 . The apparatus of claim 18 , wherein the WLAN software portion is further configured to signal wireless access to the Bluetooth hardware portion over the interface during the second segment so that low priority Bluetooth transmissions are not allowed.
20 . The apparatus of claim 18 , wherein the WLAN software portion is further configured to signal wireless access to the Bluetooth hardware portion over the interface during the second segment so that low priority Bluetooth transmissions are allowed.
21 . The apparatus of claim 12 , further comprising a coexistence agent configured to transfer information between the software portion of the WLAN module and a software portion of the Bluetooth module.
22 . The apparatus of claim 21 , wherein the information transferred by the coexistence agent is selected from the group consisting of information about the WLAN configuration state and information about the number and type of Bluetooth links.