CN101772200B - Working control method of WLAN (wireless local area network) card chip - Google Patents
Working control method of WLAN (wireless local area network) card chip Download PDFInfo
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- CN101772200B CN101772200B CN2008102410984A CN200810241098A CN101772200B CN 101772200 B CN101772200 B CN 101772200B CN 2008102410984 A CN2008102410984 A CN 2008102410984A CN 200810241098 A CN200810241098 A CN 200810241098A CN 101772200 B CN101772200 B CN 101772200B
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Abstract
The invention provides a working control method of a WLAN (wireless local area network) card chip based on a descriptor structure. When the WLAN card chip sends/receives data, control and state description the requirements on speed rate, length, and encryption method of the communication frame are conducted, meanwhile, the WLAN card chip needs to send information of the interruption state and the device state of the WLAN device to a host machine, therefore, the control information and the state information needs standardized management. According to the working characteristics of the WLAN card chip, the invention discloses the working control method of the WLAN card chip based on the descriptor structure, adopts the control descriptor and the state descriptor (the two types of descriptor) to complete the interaction of the control and the state information between the host machine and the WLAN and the network card device. Through adopting the method provided by the invention, the purpose that the host machine cooperates with the network card device to work, the control and the state description information are accurate and standard is achieved.
Description
Technical field
The present invention relates to the WLAN field; WLAN (wireless local area network) card chip sends receiving course chips operation control method; Especially normalized management is carried out in control and descriptor, through adopting the present invention to reach the purpose of WLAN host side and the collaborative work of WLAN network card equipment end.
Background technology
In the course of work of WLAN (wireless local area network) card chip, WLAN host side and the collaborative work of WLAN network card equipment end are keys of the normal operation of WLAN.In order to reach the requirement of WLAN main frame and network card equipment collaborative work, should line local area network (LAN) host side be issued to the control information of WLAN network card equipment end, and the state information that the network card equipment end consigns to host side is carried out standard.
Summary of the invention
The present invention provides a kind of working control method of WLAN (wireless local area network) card chip based on descriptor structure.Work characteristics according to WLAN (wireless local area network) card chip; Invented a kind of working control method of WLAN (wireless local area network) card chip based on descriptor structure, control and state that this method has adopted control descriptor and two types of network interface card job description symbols of state descriptors to accomplish host side and network card equipment end are mutual.Through adopting this method to reach the purpose of main frame and network card equipment collaborative work.
Method of the present invention is: adopt descriptor structure that the control and the state information of network interface card host side and network card equipment end are carried out standard alternately, descriptor is divided into controls two types of descriptor and state descriptors thus.The control descriptor is generated by network interface card host side driver, carries out standard to sending data control information, reaches the purpose of host side and the collaborative work of network card equipment end.State descriptors is generated by network card equipment, and consigns to the network interface card host side, and state descriptors has been described the state that network card equipment receives data, sends data and network card equipment interruption, reaches the purpose that the network interface card host side is grasped network card equipment work ruuning situation in real time.
Description of drawings
Fig. 1 is that set of descriptors becomes key diagram.Descriptor is made up of control descriptor and state descriptors.
Fig. 2 is a control descriptor key diagram.The control descriptor is formed by sending Data Control descriptor and beacon frame transmission control descriptor.
Fig. 3 is the state descriptors key diagram.State descriptors is formed by receiving data mode descriptor, transmission completion status descriptor and interrupt status descriptor.
Fig. 4 sends Data Control descriptor key diagram.Send the Data Control descriptor with 32 bit bit wide font formula tissues, its content comprises: Slrc describes the territory, and Llrc describes the territory, and Tx_pwr describes the territory; Rts_pwr describes the territory, and Rts_enable describes the territory, and More_frag_duration describes the territory, and Ac_id describes the territory; Tx_preamble describes the territory, and More_fragment describes the territory, and Ack_policy describes the territory, and Tx_retry_rate_bitmap describes the territory; Tx_length describes the territory, and Hdr_length describes the territory, and Tx_keytable_sel describes the territory, and Txfrm_enc describes the territory; Enc_info describes the territory, and Keyaddr_index describes the territory, and Packet_id describes the territory, and Pspoll_frm describes the territory.
Fig. 5 is that beacon frame sends control descriptor key diagram.Beacon frame sends the control descriptor with 32 bit bit wide font formula tissues, and its content comprises: Frm_length describes the territory, and Tx_frm_pwr describes the territory, and Tx_preamble describes the territory, and Packet_id describes the territory.
Fig. 6 receives data mode descriptor key diagram.Receive the data mode descriptor with 32 bit bit wide font formula tissues, its content comprises: rx_length describes the territory, and Rxhdr_length describes the territory, and Rx_brdfrm describes the territory; Rx_multifrm describes the territory, and Rxfrm_sec describes the territory, and Rxfrm_fcs_err describes the territory; Rx_rssi describes the territory, and Rx_sq describes the territory, Rx_rate: describe the territory; Rx_11b_preamble describes the territory, and Mic_err describes the territory, and Key_miss describes the territory; Enc_info describes the territory, and Key_id describes the territory, and Rx_complete_frag describes the territory.
Fig. 7 sends completion status descriptor key diagram.Send the completion status descriptor with 32 bit bit wide font formula tissues, its content comprises: Txfrm_src describes the territory, and Txfrm_lrc describes the territory; Txfrm_PacketID describes the territory; Pspoll_frm describes the territory, and Bcn_frm describes the territory, and Txfrm_fail_type describes the territory; Txfrm_last_rate describes the territory, and Tx_complete_frag describes the territory.
Fig. 8 is an interrupt status descriptor key diagram.The interrupt status descriptor is with 32 bit bit wide font formula tissues, and its content comprises: Int_vector describes the territory, and Int_frag describes the territory.
Embodiment
The present invention provides a kind of working control method of WLAN (wireless local area network) card chip based on descriptor structure; This control method is based upon the collaborative work of WLAN host side and network card equipment end on the descriptor structure basis; According to the network interface card work characteristics, descriptor is divided into two types of control descriptor and state descriptors.Use the control and the state of descriptor structure completion host side and network card equipment end mutual, to reach the purpose of main frame and network card equipment collaborative work.
Descriptor as shown in Figure 1 is divided into two types of control descriptor and state descriptors.As shown in Figure 2, wherein control descriptor and form by sending Data Control descriptor and beacon frame transmission control descriptor.As shown in Figure 3, state descriptors is formed by receiving data mode descriptor, transmission completion status descriptor and interrupt status descriptor.
As shown in Figure 4; Send the Data Control descriptor with 32 bit bit wide font formula tissues; Host side requires to describe to the transmission that the wireless network card chip sends all Frames, management frames and PS-POLL frame except that beacon frame through sending the Data Control descriptor, thus the process of transmitting work behavior of control network card chip.Its control procedure does, when the host interface controller module of unruled card chip is received the frame that host side issues, can count issuing data according to the indication of sending the Tx_length territory in the Data Control descriptor.When downlink data transmission the length described of Tx_length end of transmission when adding the length of descriptor own; Because the frame that sends need add the CRC32 check digit at the End of Frame place, this territory is also controlled media access controller data is carried out the position of adding the CRC check position and controlled the data length that base band processor module is modulated in addition.Wherein the Tx_length territory uses 12 bits to represent, is used for describing the byte number of the frame length of this transmit frame.Control media access controller in Slrc territory passes number of times to the short weight of this frame, uses 4 bits to represent.The Llrc territory is used for controlling the long number of retransmissions of media access controller to this frame, uses 4 bits to represent.The Tx_pwr territory is used for controlling the gain size that this frame of base band processor module sends, and uses 8 bits to represent.The Rts_pwr territory is used for controlling this frame of base band processor module transmission gain size that the RTS frame need use when using the RTS protection, uses 8 bits to represent.Rts_enable uses in the territory 1 bit to represent, is used for controlling media access controller this transmit frame is used the RTS protection.More_frag_duration uses in the territory 16 bits to represent; Be used for describing this transmit frame when more_fragment is effective; Indicate the duration of this segmentation next segmentation afterwards, thereby the control media access controller when being arranged, segment data is the wireless channel service time that next segment data is reserved.Ac_id uses in the territory 2 bits to represent, is used for notifying this frame of media access controller to belong to which AC formation, thereby media access controller can obtain to ask and is this Frame competitive channel according to each AC formation channel of 802.11 agreements regulations.Tx_preamble uses in the territory 1 bit to represent, being used for notifying the preceding conductivity type of this transmit frame of base band processor module is short leading or long preambles.More_fragment uses in the territory 1 bit to represent, is used for notifying this transmit frame of media access controller whether subsequent segment is arranged.Ack_policy uses in the territory 1 bit to represent; Be used for notifying the desired acknowledgment strategy of this transmit frame of media access controller to be to use still no response mechanism of normal response mechanism, media access controller can be according to the mutual completion of this frame sequence of description control in this territory.Tx_retry_rate_bitmap uses in the territory 12 bits to represent, is used for describing 12 speed of the 1Mbps to 54Mbps of 802.11g agreement regulation, speed of each corresponding expression.When long re-transmission or the generation of short weight biography, the speed gear that media access controller adopts this territory to describe in the time of can retransmitting this frame to being described in of speed according to this territory retransmits the reduction of speed processing.Hdr_length uses in the territory 6 bits to represent, is used for notifying the mac frame head length degree of this transmit frame of security module, is unit with the byte.Security module can be known this frame frame position according to this territory indication, thereby frame is carried out encryption.Tx_keytable_sel uses in the territory 1 bit to represent, is used for notifying that this transmit frame of security module uses is that the broadcast key table also is to use clean culture/multicast key list.Security module selects to use broadcast key also to be to use clean culture/multicast key that this frame is carried out encryption according to this territory indication.Txfrm_enc uses in the territory 1 bit to represent, is used for notifying this transmit frame of security module to need to encrypt, thereby starts security module work.Enc_info uses in the territory 3 bits to represent; Higher bit is used for notifying the key length of this transmit frame of security module when WEP encrypts; Low 2 bits are used for notifying security module this transmit frame cipher mode, thereby security module can start corresponding crypto engine according to this territory indication this frame are encrypted.Keyaddr_index uses in the territory 5 bits to represent, is used for describing key list index numerical value, when this transmit frame uses broadcast key table, expression be the broadcast key table index, when this transmit frame uses list/multicast key table, expression be list/multicast key table index.Security module obtains the deposit position of this frame needs use key according to the indication of this territory in the broadcasting of correspondence and clean culture/multicast key table, and then obtains encryption key this frame is carried out encryption.Packet_id uses in the territory 12 bits to represent, is used for representing the transmission identifier of transmit frame, all corresponding unique transmission identifier of each transmit frame.Pspoll_frm: use 1 bit to represent, being used for notifying this transmit frame of media access controller is a PS-POLL frame.
As shown in Figure 5; Beacon frame sends the control descriptor with 32 bit bit wide font formula tissues; It is similar with transmission Data Control descriptor to the control procedure of wireless network card chip that beacon frame sends the control descriptor; Host side is sent the control descriptor through beacon frame the wireless network card chip is carried out the description that beacon frame sends requirement, thereby the beacon frame of control network card chip sends work behavior.Its control procedure does, when the host interface controller module of unruled card chip is received the frame that host side issues, can send the indication in the Frm_length territory in the control descriptor according to beacon frame and count issuing data.When downlink data transmission the length described of Frm_length end of transmission when adding the length of descriptor own; Because the beacon frame that sends need add the CRC32 check digit at the End of Frame place, this territory is also controlled media access controller data is carried out the position of adding the CRC check position and controlled the data length that base band processor module is modulated in addition.Wherein the Frm_length territory uses 12 bits to represent, is used for describing the byte number of the frame length of this beacon frame.The gain size that this beacon frame of Tx_frm_pwr territory control base band processor module sends uses 8 bits to represent.Tx_preamble uses in the territory 1 bit to represent, being used for notifying the preceding conductivity type of this beacon frame of base band processor module is short leading or long preambles.The Packet_id territory is identical with Packet_id territory implication in sending the Data Control descriptor, uses 12 bits to represent, is used for representing the transmission identification serial number of transmit frame.This territory is unified numbering with the Packet_id territory of sending in the Data Control descriptor by host side, thereby constitutes the recognition system that wireless network card Frame, management frames and PS-POLL frame are sent.And wireless network card can send the completion status descriptor with the transmission completion status composition of Packet_id territory and the corresponding frame of this transmission identification serial number of collecting after sending completion, consigns to host side.Host side is then learnt this transmission completion status descriptor and the corresponding relation that sends data through the Packet_id territory of sending in the completion status descriptor, thereby learns the final send state information of these transmission data.
As shown in Figure 6, receive the data mode descriptor with 32 bit bit wide font formula tissues, by the generation of wireless network card chip, the needs that are used for notifying host side to receive consign to the information of Frame, management frames and the control frame of host side.Its content comprises; Rx_length uses in the territory 12 bits to represent; Being used for notifying the frame length of this received frame of host side, is unit with the byte, is generated by base band processor module; The host interface controller module of unruled card chip also can use this territory to obtain consigning to the reception data length of host side, thereby knows the condition of paying data of accomplishing.Rxhdr_length uses in the territory 6 bits to represent; Being used for notifying the mac frame head length degree of this received frame of host side, is unit with the byte, is generated by media access controller; Security module also can be known this received frame frame position according to this territory, thereby when needs are deciphered, frame is carried out decryption processing.Rx_brdfrm uses in the territory 1 bit to represent; Being used for notifying this received frame of host side is broadcast frame; Generate by media access controller; Use the broadcast key table when security module also can be informed in the needs deciphering according to this territory, if the frame that receives is not a broadcast frame, security module will be used clean culture/multicast key list when needs are deciphered.Rx_multifrm uses in the territory 1 bit to represent; Being used for notifying this received frame of host side is the multicast frame; Generate by media access controller; Thereby security module also can know that this frame is that the multicast frame uses the address 1 of received frame to come clean culture/multicast key list is carried out index according to this territory when needs are deciphered, if what receive is not that broadcast frame neither the multicast frame, security module can use the address 2 of received frame to come clean culture/multicast key list is carried out index when needs are deciphered.Rxfrm_sec uses in the territory 1 bit to represent, being used for notifying this received frame of host side is scrambled data frame, is generated by media access controller, and security module also can know whether needs carry out decryption processing to this received frame according to this territory.Rxfrm_fcs_err uses in the territory 1 bit to represent, is used for notifying this received frame of host side FCS check errors, is generated by media access controller.Rx_rssi uses in the territory 8 bits to represent, is used for notifying this received frame of host side to receive signal strength signal intensity, is generated by BBP.Rx_sq uses in the territory 8 bits to represent, is used for notifying host side this received frame received signal quality, is generated by BBP.Rx_rate uses in the territory 7 bits to represent, is used for notifying the transmission rate of this received frame of host side, is generated by BBP.Rx_11b_preamble uses in the territory 1 bit to represent, is used for notifying the preceding conductivity type of this received frame of host side, is generated by BBP.Mic_err uses in the territory 1 bit to represent, is used for notifying host side this received frame decryption error, is generated by security module.Key_miss uses in the territory 1 bit to represent, is used for notifying that security module does not index effective key in this received frame decrypting process of host side, is generated by security module.Enc_info uses in the territory 3 bits to represent, notice host side this received frame decryption information, and higher bit is used for describing the key length of this received frame when using the WEP mode to decipher, and low dibit is represented to be generated the deciphering type that this received frame uses by security module.Key_id uses in the territory 2 bits to represent, is used for notifying that host side uses when this received frame is deciphered is where to overlap key.Rx_complete_frag uses in the territory 2 bits to represent, being used for notifying this descriptor of host side is to receive the data mode descriptor.Host side will be carried out real-time tracking to the working condition of wireless networks such as the work quality of wireless channel and opposite end Wireless Communication Equipment ability according to the state information of the received frame that from receive the data mode descriptor, obtains, thereby determine the operating state of local wireless network card easily.
As shown in Figure 7, send the completion status descriptor with 32 bit bit wide font formula tissues, generate by the wireless network card chip, be used for notifying host side to accomplish the state information of transmit frame.Its content comprises that Txfrm_src uses in the territory 4 bits to represent, is used for notifying this frame short weight when sending completion of having accomplished transmission of host side to pass number of times, is generated by media access controller.Txfrm_lrc uses in the territory 4 bits to represent, is used for notifying this frame of having accomplished transmission of host side sending completion duration number of retransmissions, is generated by media access controller.Txfrm_PacketID uses in the territory 12 bits to represent; Be used for notifying this frame of having accomplished transmission of host side to send identification serial number; It is identical with the Packet_id territory numerical value that transmission Data Control descriptor or beacon frame send in the control descriptor, is generated by media access controller.Pspoll_frm uses in the territory 1 bit to represent, being used for notifying this frame of having accomplished transmission of host side is a PS-POLL frame, is generated by media access controller.Bcn_frm uses in the territory 1 bit to represent, being used for notifying this frame of having accomplished transmission of host side is a beacon frame, is generated by media access controller.Txfrm_fail_type uses in the territory 1 bit to represent, is used for notifying this frame of having accomplished transmission of host side to send Fail Type, is generated by media access controller.Txfrm_last_rate uses in the territory 7 bits to represent, be used for notifying host side this accomplished the last transmission rate of data of the frame of transmission, generate by media access controller.Tx_complete_frag uses in the territory 2 bits to represent, being used for notifying this descriptor of host side is to send the completion status descriptor.Host side can be according to the transmission end-state information that from send the completion status descriptor, obtains; Work quality and Local wireless network equipment working state to wireless channel carry out real-time analysis, thereby determine the transmission strategies such as transmission rate number of retransmissions of local wireless network card easily.
As shown in Figure 8, the interrupt status descriptor is generated by the wireless network card chip with 32 bit bit wide font formula tissues, is used for notifying the interrupt status information of host side wireless network card chip.Its content comprises; Int_vector uses in the territory 9 bits to represent; Be used for notifying the host side wireless network card present interrupt vector; Wherein higher bit representes that the chip wake-up interrupts that produces in the wireless network card chip slapper, low 8 bits represent that the outer User Defined that interrupts belonging to the expansion of wireless network card chip functions of the sheet that produces through wireless network card chip input pin interrupts, and is generated by system controller.Int_frag uses in the territory 2 bits to represent, being used for notifying this descriptor of host side is the interrupt status descriptor.Host side can know that chip is in the interruption situation that normal mode of operation still is sleep pattern and whole wireless network card equipment according to the wireless network card chip interrupt information that from interrupt state descriptors, obtains; Thereby determine the power managed strategy of local wireless network card easily, and accomplish the required self-defining operation of user according to other User Defined disrupted condition.
WLAN (wireless local area network) card chip carries out standard according to the control descriptor content that the host side driver generates to sending data, and sends sending data according to the control descriptor content.For sending data and the state that receives data and the operating state of wireless network card; WLAN (wireless local area network) card chip will generate according to different situations and receive the data mode descriptor, send completion status descriptor and interrupt status descriptor three class descriptors; And consign to the wireless LAN card host side; So that the host side driver can be known the network interface card operating state in real time, control measure are targetedly taked in work for network interface card.
More than disclosedly be merely several specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those skilled in the art can think variation all should drop in protection scope of the present invention.
Claims (1)
1. working control method of WLAN (wireless local area network) card chip; It is characterized in that; Form descriptor structure by control descriptor and two types of network interface card job description symbols of state descriptors; Wherein control descriptor and form by sending Data Control descriptor and beacon frame transmission control descriptor, state descriptors is formed by receiving data mode descriptor, transmission completion status descriptor and interrupt status descriptor, wherein:
(1), sends the control information that the Data Control descriptor is used for describing the Frame, non-beacon frame, other management frames and the PS-POLL frame that need the WLAN (wireless local area network) card chip transmission; This transmission Data Control descriptor together is issued to WLAN (wireless local area network) card chip with the Frame that is described, non-beacon frame, other management frames and PS-POLL frame; Host side requires to describe to the transmission that WLAN (wireless local area network) card chip sends all Frames, management frames and PS-POLL frame except that beacon frame through sending the Data Control descriptor, thus the process of transmitting work behavior of control WLAN (wireless local area network) card chip;
(2), beacon frame sends the control information that the control descriptor is used for describing the beacon frame that needs the WLAN (wireless local area network) card chip transmission; This beacon frame sends the control descriptor and together is issued to WLAN (wireless local area network) card chip with the beacon frame that is described; It is similar with transmission Data Control descriptor to the control procedure of WLAN (wireless local area network) card chip that beacon frame sends the control descriptor; Host side is sent the control descriptor through beacon frame WLAN (wireless local area network) card chip is carried out the description that beacon frame sends requirement, thereby the beacon frame of control WLAN (wireless local area network) card chip sends work behavior;
(3), reception data mode descriptor is used for describing other WLAN (wireless local area network) card chips that receive and sends to the state information that the various needs of local wireless local area network the core of the card sheet consign to Frame, management frames and the control frame of host side; This reception data mode descriptor together consigns to the host side driver with the frame that receives that is described; Host side is carried out real-time tracking according to the state information of the received frame that from receive the data mode descriptor, obtains to the work quality of wireless channel and the working condition of opposite end Wireless Communication Equipment ability, thus the operating state of decision local wireless network card;
(4), transmission completion status descriptor is used for describing the host side of just having accomplished transmission and is issued to the final transmit status that WLAN (wireless local area network) card chip need send various frames; This transmission completion status descriptor consigns to the host side driver after being generated by WLAN (wireless local area network) card chip; Host side is according to the transmission end-state information that from send the completion status descriptor, obtains; Work quality and Local wireless network equipment working state to wireless channel carry out real-time analysis, thereby the transmission rate number of retransmissions of decision local wireless network card sends strategy;
(5), the interrupt status descriptor is used for describing that chip internal that WLAN (wireless local area network) card chip produces interrupts and the sheet that produces through the WLAN (wireless local area network) card chip input pin interrupts outward; This interrupt status descriptor consigns to the host side driver after being generated by WLAN (wireless local area network) card chip; Host side knows that according to the WLAN (wireless local area network) card chip interrupting information that from interrupt state descriptors, obtains chip is in the interruption situation that normal mode of operation still is sleep pattern and whole WLAN (wireless local area network) card chip; Thereby the power managed strategy of decision local wireless network card, and according to the required self-defining operation of other User Defined disrupted condition completion user.
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| CN101226397A (en) * | 2008-02-04 | 2008-07-23 | 南京理工大学 | High reliability distributed Ethernet test control system |
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| CN101226397A (en) * | 2008-02-04 | 2008-07-23 | 南京理工大学 | High reliability distributed Ethernet test control system |
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Address after: 102209 Beijing, Beiqijia, the future of science and technology in the south area of China electronic network security and information technology industry base C building, Patentee after: Beijing CEC Huada Electronic Design Co., Ltd. Address before: 100102 Beijing City, Chaoyang District Lize two Road No. 2, Wangjing science and Technology Park A block five layer Patentee before: Beijing CEC Huada Electronic Design Co., Ltd. |