藍牙和WiFi的共存 -- co-existence

qwer1234taip

請指教 ---目前的Solution

Co-existence (Wireless & Bluetooth)
        Wireless and Bluetooth Co-existence is very important as transceiver in same time as PDA or Motion Device.
l          Solution 1.  by TI (with TI BT)
The collaborative mechanism allows for the sharing of time between the Bluetooth link and the 802.11 WLAN link.
The objectives of the collaborative coexistence mechanism are:
              • The Bluetooth PA should not be turned on or off during transmission, as spurious transmissions could result and cause regulatory certification problems
              • If Bluetooth does not have traffic, 802.11 performances should not be impacted
              • If 802.11 do not have traffic, Bluetooth performance should not be impacted
              • If Bluetooth and 802.11 both have traffic, there should be a fair sharing of that provides the maximum available throughput. Of course, throughput reduction will occur in both, BT and WLAN.
                • High priority Bluetooth traffic such as voice should take priority over all 802.11 traffic.

To achieve these objectives, 3 signals are provided by the BRF63xx to indicate and control BT activity.
They support SoftGemini algorithm to slove this problem. That will focus on the VOIP solution.  BT VOIP as WLAN VOIP
l          Solution 1.  by Marvell (support CSR and Broadcom BT)
The collaborative mechanism allows for the sharing of time between the Bluetooth link and the 802.11 WLAN link. Use two signals . 2-wire coexistence signaling or 3-wire coexistence signaling. And  Single or dual antenna support also.


l          Solution 2. 802.15.2 (other)
there are two classes of Coexistence Mechanisms: Collaborative and Non-Collaborative Mechanisms. If it is possible for the WPAN™ and the WLAN to exchange information between one another then it is possible to develop a Collaborative Coexistence Mechanism where the two wireless networks negotiate to minimize mutual interference. If there is no method to exchange information between the two wireless networks then you can use a Non-Collaborative Coexistence Mechanism. Submissions of both types of mechanisms are encouraged. Depending on the operating environment one technique may be preferred over the other ;Link here.
  
Reference:
l          Microsoft WHC2006 for Bluetooth ppt file
l          Bluetooth Technology and Application pdf file
l          An Introduction to Bluetooth from “Stonestreet one” pdf file
l          *** Bluetooth Introduce and Co-existence Introduce from “Partner” pdf file
l          TI-co-existence introduct htm; file

flapperese

在蓝牙和WIFI共存的开发上，CSR携手天线厂商FRACTUS已经有了典型的开发案例，可以参见电子系统设计上的网页：http://www.ed-china.com/ART_8800013651_400001_500003_HN_0e9990b0.HTM

Tiborlee

WIFI+BT module and super BlueTooth “超級藍芽”方案介紹～

本公司係專業的CCM和Wireless Module的方案供應商，我司設計的WG7210-00 Wireless Module,是WiFi+BT的SIP高集成設計，採用TI的芯片，具備低功耗及省電優勢，co-existence語音通訊品質佳。為了適應目前中國國內關於手機具備WiFi功能的政策限制，而且隨時可能開放的情況下，本司特推出了WG7210-10 模塊，是在WG7210-00 的設計基礎上暫時去掉了WiFi的部分，我們把它叫做“超級藍芽”。其優越之處在於與主板間之介面完全相同，客戶應用彈性極大：

一是：可以適應目前客戶同一機型外銷和內銷的靈活切換，即外銷部分可以用WG7210-00模塊，內銷部分用WG7210-10模塊。

二是：目前先使用“超級藍芽”即WG7210-10 模塊，可以在國家WiFi手機政策開放時，透過更改採購料號立即推出含WiFi功能的手機，一砲打響迅速佔領市場，搶得先機。

期望藉此方案協助您創造商機與亮點，目前已有客戶積極採取此一方案、佈局市場，由於涉及平台搭配，歡迎您與我司連絡洽詢，以提供進一步之評估與資訊，非常感謝！

以下為我司WIFI相關產品之規格介紹…



WG7201

功能規格：WLAN 無線模組

主芯片廠牌：TI (Texas Instrument)

主芯片編號：WL1251, WL1251FE, WL1251PM

支持協議：IEEE 802.11 b/g

支持頻道： 2.4 GHz

支持頻寬：11Mbps (11b), 54Mbps (11g)

連結接口：SDIO, SPI

作業系統：Windows CE 5.0/6.0, Windows Mobile 5.0/6.0, Linux 2.4/2.6

尺寸規格：11x11x1.7m/m

封裝接腳：56 pin LGA (Land Grid Array)



           WG7210

功能規格：WLAN + Bluetooth Combo 無線模組

主芯片廠牌：TI (Texas Instrument)

主芯片編號：WL1251, WL1251FE, WL1251PM, BRF6300

支持協議：IEEE 802.11 b/g, Bluetooth 2.0 EDR

支持頻道： 2.4 GHz

支持頻寬：11Mbps (11b), 54Mbps (11g), 4Mbps (BT)

連結接口：SDIO, SPI (WLAN), UART (BT)

作業系統：Windows CE 5.0/6.0, Windows Mobile 5.0/6.0, Linux 2.4/2.6

尺寸規格：12x13x1.65m/m

封裝接腳：69 pin LGA (Land Grid Array)



歡迎洽詢：13732663036 李先生

郵箱：tiborlee@wdi-ks.com.cn

asfriend

我之前在坛子里面有发过一篇文章，可以看看，
不过可能网上流行的都是同一篇吧，呵呵
http://www.52rd.com/bbs/Detail_RD.BBS_113796_89_1_1.html

TOMMY_ELE

以下是引用asfriend在2008-3-19 11:24:36的发言：
我之前在坛子里面有发过一篇文章，可以看看，
不过可能网上流行的都是同一篇吧，呵呵
http://www.52rd.com/bbs/Detail_RD.BBS_113796_89_1_1.html

谁研究过DECT（1.9G）和GSM的1800MHZ频段共存的？