Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W72/00—Local resource management
  • H04W72/20—Control channels or signalling for resource management
  • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
  • H04B1/69—Spread spectrum techniques
  • H04B1/707—Spread spectrum techniques using direct sequence modulation
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L1/00—Arrangements for detecting or preventing errors in the information received
  • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
  • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
  • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W48/00—Access restriction; Network selection; Access point selection
  • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
  • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W72/00—Local resource management
  • H04W72/20—Control channels or signalling for resource management
  • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
  • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
  • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
  • H04B2201/70703—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation using multiple or variable rates
  • H04B2201/70705—Rate detection

Definitions

• Base station mobile station, mobile communication system and control signal transmission control method
• the present invention relates to a base station, a mobile station, a mobile communication system, and a control signal transmission control method.
• a base station is a data information signal and a control signal of an upper layer, for example, user information.
• the authentication information of the user, the control signal of handover when the user moves from cell to cell, and the like are transmitted to the mobile station.
• the base station in downlink, a channel unique to all users and a channel shared by all users are prepared.
• the base station code-multiplexes data on each channel (see, for example, Non-Patent Document 1). Specifically, the base station comprises Forward Access Channel (FACH) and Broadcast Channel.
• FACH Forward Access Channel
• Broadcast Channel Broadcast Channel
• the FACH is a channel that multiplexes control information of each user on a time axis, and is mainly used for upper layer signal exchange at call setup. Control signals are mapped to Secondary Comm Control Channel. In a row, FACH is used for Random Access Channel response. Broadcast Channel is a channel for notifying broadcast information common to all users, for example, system information and cell information. Control signals are mapped to Primary Comm Control Channel.
• a base station uses Random Access Channel in an uplink channel. Random Access Channel is a channel for transmitting control information of the upper layer. Control information is mapped to Physical Random Channel.
• HSDPA high speed shared control channel
• HS high speed shared channel
• HS-SCCH performs high-speed packet transmission HS-PDSCH transmission Layer 1 and 2 Perform Dunner on shared CH.
• Information to be transmitted using this HS-SCCH is user information, Modulation & Coding scheme Set (MCS) (a set of modulation and coding), etc., and such information is code-multiplexed with the data CH.
• MCS Modulation & Coding scheme Set
• HS—DPCCH carries out high-speed packet transmission HS—Performs Layer 2 and Signaling at the time of PDSCH reception in separate CH. Information transmitted using this HS—DPCCH is ARQ (automatic repeat request). These are ACK / NACK and CQI (Channel Quality Indicator), and these pieces of information are code-multiplexed (see, for example, Non-Patent Document 2).
• Non-Patent Document 1 3GPP TS 25.212
• Non-Patent Document 2 3GPP TS 25.213
• the control signal of the upper layer for example, a signal indicating a report of reception status when authentication and handover are performed when setting a call, and a data signal are each channel coding units.
• And channel coding is performed, and input to the multiplexer.
• the control signal and data signal of the upper layer are transmitted by the physically same cable.
• the channel coding unit in addition to channel coding, Caro with CRC and Rate Matching are performed.
• the multiplexing unit multiplexes the control signal and data signal of the upper layer to which the input channel code is performed on a physical channel dedicated to the control channel or a dedicated channel, and transmits the multiplexed signal.
• the channel rate dedicated to the control channel is about 3.4 kbps, and there is a problem that it takes a long time for an outgoing call such as authentication or call connection to take a long time.
• the base station As shown in the data signal of user 1, the data signal of user N, and the control signal, the power to multiplex (code multiplex) and transmit signals addressed to a plurality of users to a channel dedicated to the control channel, or , Data signal and control signal as shown in user 2 data signal and control signal The signal is multiplexed in advance and then multiplexed (code multiplexed) with another signal.
• An object of the present invention is to provide a base station, a mobile station, a mobile communication system, and a control information transmission control method capable of shortening the transmission time of a control signal.
• a base station transmits a control signal of an upper layer, transmission rate determining means for determining a transmission rate of a control channel, and the upper layer according to the determined transmission rate. It is one of the features of the present invention that it comprises a transmission means for assigning a predetermined band to a control channel for transmitting a control signal of
• Another base station of the present invention is an upper layer control signal determination means for determining whether a control signal transmitted from a mobile station indicates that an upper layer control signal is to be transmitted;
• One of the features is characterized by comprising channel assignment means for assigning a USCH to the mobile station based on disconnection and a notification means for sending an assignment notification packet for notifying that the mobile station has assigned a USCH.
• the mobile station of the present invention is characterized in that it comprises upper layer control signal transmission means for multiplexing and transmitting the control signal of the upper layer to the USCH.
• the base station transmits a control signal of an upper layer, wherein a control signal transmitted from the mobile station is transmitted.
• the upper layer control signal judging means for judging whether or not to indicate a channel assignment means for assigning the USCH to the mobile station based on the judgment, and an assignment notification for notifying the mobile station that the USCH has been assigned.
• notification means for transmitting packets
• the mobile station transmits a control signal indicating that the control signal of the upper layer is to be transmitted.
• a transmitting unit determines whether the allocation notification packet transmitted from the base station is the local station or not.
• Lower layer control signal determination One feature of the present invention is that it comprises: means and upper layer control signal transmission means for multiplexing and transmitting control signals of the upper layer to the USCH.
• the mobile station can transmit the control signal of the upper layer using the USCH assigned to the base station.
• the control signal of the upper layer is determined according to the step of determining the transmission rate of the control channel for transmitting the control signal of the upper layer, and the determined transmission rate.
• One of the features is the step of assigning a predetermined band to the control channel to be transmitted, and transmitting the control signal of the upper layer to which the predetermined band is assigned.
• another control signal transmission control method of the present invention comprises the steps of transmitting a control signal indicating transmission of a control signal of the upper layer, and transmitting the control signal of the upper layer.
• the steps of determining whether to indicate transmission or not, allocating U SCH based on the determination, transmitting an allocation notification packet for notifying that USCH has been allocated, and an allocation notification packet of its own station The method is characterized in comprising the steps of: determining whether it is true, and multiplexing and transmitting the control signal of the upper layer to the USCH based on the result of determining whether the assignment notification packet is its own station or not.
• the base station can harmonize the uplink shared channel (USCH) with the control signal of the upper layer transmitted by the mobile station, and the mobile station can use the USCH. And upper layer control signals can be transmitted.
• USCH uplink shared channel
• the embodiment of the present invention it is possible to realize a base station, a mobile station, a mobile communication system, and a control information transmission control method capable of shortening the transmission time of control signals.
• FIG. 1 is a partial block diagram showing a base station.
• FIG. 2 is a partial block diagram showing a base station.
• FIG. 3 is a partial block diagram showing a base station in accordance with one embodiment of the present invention.
• FIG. 4 is an explanatory diagram showing an operation of a base station according to an embodiment of the present invention.
• FIG. 5 An explanatory view showing an IP packet.
• FIG. 6 is a partial block diagram showing a base station according to an embodiment of the present invention.
• FIG. 7 is an explanatory diagram showing an operation of a base station according to an embodiment of the present invention.
• FIG. 8 is an explanatory diagram showing an operation of a base station according to an embodiment of the present invention.
• FIG. 9 is an explanatory diagram showing an operation of a base station according to an embodiment of the present invention.
• FIG. 10 is an explanatory view showing the operation of a base station according to an embodiment of the present invention.
• FIG. 11 is a sequence diagram showing an operation of the mobile communication system.
• FIG. 12 is a partial block diagram showing a base station according to an embodiment of the present invention.
• FIG. 13 is a partial block diagram showing a mobile station according to an embodiment of the present invention.
• FIG. 14 is a sequence diagram showing an operation of a mobile communication system according to an embodiment of the present invention.
• FIG. 15 is a sequence diagram showing an operation of a mobile communication system according to an embodiment of the present invention.
• a mobile communication system in accordance with an embodiment of the present invention includes a base station 100 and a mobile station 200 capable of wireless communication with the base station 100.
• a base station 100 according to a first embodiment of the present invention will be described with reference to FIG.
• the base station 100 includes a downlink scheduling unit 102, a transmission rate determination unit connected to the downlink scheduling unit 102, and a transmission unit 104 as a transmission unit.
• the lower link scheduling unit 102 includes a buffer 112 to which a control signal of the upper layer, for example, a signal indicating an authentication at the time of call setting and a reception status at handover is input, and one or more buffers to which data signals are input.
• the downlink scheduling unit 102 includes the buffer 112 and the buffers 114 to 11
• the coding unit 118 is connected to the transmission unit 104.
• the buffer 112 temporarily stores the input upper layer control signal. Buffer 1
• Upper layer control signals and data signals are physically transmitted on the same cable.
• Scheduler 116 is configured to store upper level registers stored in buffer 112 and buffers 114 to 114.
• the signal to be transmitted preferentially is selected and input to the coding unit 118.
• the scheduler 116 prioritizes (buffers) each buffer.
• the scheduler 116 sets the information stored in the buffer 112 as the top priority queue, and unconditionally transmits the information when it is received in this queue. That is, when the control signal of the upper layer is input to the buffer 112, the scheduler 116 preferentially inputs the control signal of the upper layer to the code input unit 118.
• the IP packet is a control signal of the upper layer, for example, by referring to a flag indicating whether it is a control signal of the upper layer added to its header or not. It is distinguished whether or not.
• a predetermined field is prepared in the IP packet, and the control signal of the upper layer and the data signal are distinguished according to the value of the signal, and stored in the buffer 112 or buffer 114: 114. .
• the control signal of the upper layer is set, and if it is 1, it is set that the signal is a data signal. Differentiated. By configuring in this way, it is possible to store and transmit control information in the IP packet in addition to data, QoS information, and information indicating priority data or not.
• the encoding unit 118 encodes the input signal and inputs the signal to the transmission unit 104.
• the transmitter 104 modulates the coded signal and transmits it using the shared channel.
• the transmitting unit 104 transmits the encoded signal at high speed, for example, at a transmission rate of 10 Mbps.
• the shared channel is shared by a plurality of users and occupies one slot by at least one user. By doing this, it is possible to significantly reduce the time for transmitting the control signal S.
• the scheduler 116 prioritizes the control signal of the upper layer, and inputs the control signal of the upper layer to the code portion according to the priority.
• the buffer for temporarily storing the control signal of the upper layer and the data signal may be configured by one buffer.
• the scheduler 116 refers to the header of the IP packet, determines whether or not it is a control signal of the upper layer, and inputs it to the encoding unit 118 based on the result.
• the base station 100 prepares a high-speed slot dedicated to a control channel in order to realize a network with a small delay.
• the control channel of each user is code multiplexed, but variable according to the necessary control information.
• Base station 100 is an encoding unit to which data signals of user 1 to user N are respectively input.
• a transmission rate determining means connected to N 1 N and 126 and to the primary modulation units 124 to 124: 124 and 126
• Encoding sections 120 to 120 perform encoding processing of the input data signal
• the primary modulation units 124 to 124 receive the input code.
• Primary modulation of the signal subjected to N N processing is performed and input to multiplexer 128.
• the encoding unit 122 performs encoding processing of the input control signal, and inputs the result to the primary modulation unit 126.
• the primary modulation unit 126 performs primary modulation of the input encoded signal and inputs the signal to the multiplexing unit 128.
• Multiplexing section 128 assigns bands to the input data signal and control signal subjected to primary modulation processing, performs multiplexing processing, and inputs the result to secondary modulation section 130. For example, the multiplexing unit 128 allocates a bandwidth of 32 k to the data signal of each user. Also, the multiplexing unit 128 variably allocates the bandwidth to be allocated to the control signal, for example, at 32k-10M. As described above, by using the control CH itself for transmitting the control signal as a variable band, the control channel for transmitting the control signal according to the traffic condition and the urgency (priority) of the control signal. The transmission rate can be controlled. In this case, for example, the multiplexing unit 128 controls the transmission rate to approximately 500 kbps for the HO control signal and approximately 1 Mbps for call setting.
• multiplexing section 128 time multiplexes the data signal and control signal subjected to the primary modulation processing. As shown in FIG. 7, multiplexing section 128 assigns a control CH and a data CH to a plurality of slots. In this case, at least one of code multiplexing and frequency multiplexing is performed among users in the slot to which the control CH is assigned (called a slot for control CH).
• the slots to which the control CH and data CH are assigned are made variable.
• the base station 100 notifies the mobile station 200 of the position of the slot to which the control CH is assigned.
• the multiplexing unit 128 may fix and assign slots to which the control CH and data CH are assigned to a plurality of slots. By doing this, the base station 100 can eliminate the process of notifying the mobile station 200 of the position of the slot to which the control CH is assigned.
• multiplexing section 128 fixes and allocates slots to which control CHs and data CHs are allocated to a plurality of slots, and slots to which control CHs and data CHs are additionally allocated. Let's make it variable. In this case, the base station 100 needs to notify the mobile station 200 of the position of the control CH slot.
• the multiplexing unit 128 may frequency-multiplex the data signal and control signal subjected to the primary modulation processing.
• Multiplexing section 128 assigns control CH and data CH to a plurality of sub carriers as shown in FIG. In this case, at least one of code multiplexing and time multiplexing is performed among users in the sub-carrier to which the control CH is assigned.
• multiplexing section 128 makes the subcarrier to which the control CH is assigned variable for a plurality of subcarriers.
• base station 100 notifies mobile station 200 of the position of the control CH subcarrier.
• the control CH subcarrier has a comb-like pattern in uplink.
• multiplexing section 128 may allocate a fixed control subcarrier by allocating subcarriers. By doing so, the base station 100 can eliminate the process of notifying the mobile station 200 of the position of the subcarrier to which the control CH has been assigned.
• multiplexing section 128 may assign a control CH to a fixed subcarrier in a fixed manner, and may additionally assign a control CH to a subcarrier in a variable manner. In this case, the base station 100 needs to notify the mobile station 200 of the position of the subcarrier to which the control CH is assigned.
• the multiplexing unit 128 may code-multiplex the data signal and control signal subjected to the primary modulation processing.
• Multiplexing section 128 assigns spreading codes to control CH and data CH as shown in FIG. In this case, at least one of code multiplexing and time multiplexing is performed between users using the control code of the same spreading code.
• multiplexing section 128 varies the spreading code number and spreading factor assigned to the control CH.
• the base station 100 notifies the mobile station 200 of the spreading code number assigned to the control CH.
• multiplexing section 128 may assign a spreading code number and spreading factor to control CH and assign them. By doing so, the base station 100 can eliminate the process of notifying the mobile station 200 of the spreading code number and spreading factor of the control CH. Also, multiplexing section 128 may assign a spreading code number and a spreading factor to control CH with fixed assignment, and may additionally perform variable assignment. In this case, the base station 100 needs to notify the mobile station 200 of the spreading code number assigned to the control CH.
• the secondary modulation unit 130 performs secondary modulation on the data signal and control signal subjected to the primary modulation process subjected to the multiplexing process, and is transmitted.
• the control CH itself is a variable band.
• the two or three users secure a band to transmit data signals, and the remaining band is assigned to the control CH. By doing this, it is possible to control the transmission rate of the control signal.
• the lower layer control signal is, for example, control information such as channel assignment information, ACK, NACK and the like.
• the assigned channel and code are designated by the upper layer station, not the base station. However, in HSDPA, this designation is performed at the base station.
• the base station maps lower control signals, eg, channel assignment information, to the physical CH and transmits it to the mobile station. In this case, the mobile station operates with error detection as false. Therefore, the base station adds an error detection code to the lower control signal according to its application.
• the encoding unit 122 adds an error detection code to the control signal according to application, for example, demodulation, decoding, retransmission and the like.
• an error detection code is added to a control signal group classified according to application.
• the unit to which the error detection code is added for example, the length may be variable, and the error detection code may be the same or different. If one error detection code is added to the lower control signals instead of individual ones, the possibility of detection errors increases because the number of bits targeted for error detection is large. Thus, the error detection accuracy can be improved by individually adding the error detection code according to the application.
• one or more error detection codes are used as a unit of error correction coding.
• the error detection code may be changed according to the bit group of the control signal group.
• at least one error correction coding block may be allowed in one radio frame.
• Mobile station 200 transmits a control signal indicating a data transmission request to base station 100 via RACH.
• Base station 100 assigns a code to mobile station 200, and transmits a control signal indicating data transmission permission on the FACH.
• the mobile station 200 transmits the signal of the upper layer with the assigned code to the base station 100 on the DCCH (Dedicated Control Channel).
• DCCH Dedicated Control Channel
• the mobile station 200 transmits a control signal of the upper layer to the base station 100 as "USCH (U plmk Shared and hannel)".
• a base station 100 according to an embodiment of the present invention will be described with reference to FIG.
• the base station 100 includes an upper layer control signal determination unit 152, a channel assignment unit 154 connected to the upper layer control signal determination unit 152, and a notification unit connected to the channel assignment unit 154. And a transmitter unit 156.
• Upper layer control signal determination section 152 determines whether or not the control signal transmitted from mobile station 200 to be described later by the reservation control CH is a signal indicating that the control signal of the upper layer is to be transmitted.
• upper layer control signal determination section 152 determines whether to indicate that the control signal of the upper layer is to be transmitted by referring to a predetermined flag of the transmitted IP packet. For example, a predetermined field is prepared in the IP packet, and whether to indicate that the control signal of the upper layer is to be transmitted or not is discriminated according to the value of the field.
• the channel assignment unit 154 assigns the uplink USCH when the control signal transmitted from the mobile station 200 on the reservation control CH indicates that the control signal of the upper layer is to be transmitted. In this case, the channel assignment unit 154 assigns the USCH according to the amount of information.
• the transmitting unit 156 performs notification (allocation notification) indicating that the uplink USCH has been allocated to the mobile station 200 that has transmitted the reservation control CH. For example, in a packet indicating assignment notification, a user ID and a modulation & coding scheme set (MCS) are stored. In the MCS, instruction information indicating which modulation method to transmit is stored.
• notification allocation notification
• MCS modulation & coding scheme set
• the mobile station 200 includes a receiving unit 252, a lower layer control signal determining unit 254 connected to the receiving unit 252, and a control signal generating unit connected to the lower layer signal determining unit 254. And a transmission data generation unit 256 as an upper layer control signal transmission unit.
• the receiving unit 252 receives an assignment notification from the base station 100 and inputs the notification to the lower layer control signal determining unit 254.
• Lower layer control signal determination section 254 determines whether or not the user ID stored in the input assignment notification matches the ID of the mobile station of interest, and if it matches, it is transmitted to transmission data generation section 256 Command to generate data.
• the transmission data generation unit 256 generates a control signal indicating that the control signal of the upper layer is to be transmitted, and transmits the control signal. For example, the transmission data generation unit 256 transmits, using the reservation control CH, an IP packet with a flag indicating that the control signal of the upper layer is to be transmitted. Further, the transmission data generation unit 256 transmits the control signal of the upper layer with reference to the MCS information stored in the assignment notification.
• the transmission data generation unit 256 of the mobile station 200 transmits, to the base station 100, a control signal indicating that the control signal of the upper layer is transmitted on the reservation control CH.
• Base station 100 determines, in upper layer control signal determination section 152, whether the received control signal is a control signal indicating that the control signal of the upper layer is to be transmitted or not.
• the received control signal is a control signal indicating that the control signal of the upper layer is to be transmitted
• the channel assignment unit 154 preferentially assigns the uplink USCH to the mobile station 200.
• transmission section 156 notifies (assignment notification) that mobile station 200 has been assigned the uplink USCH. In this case, the channel assignment unit 154 performs assignment according to the amount of information.
• the receiving unit 252 of the mobile station 200 inputs the assignment notification to the lower layer control signal determination unit 254.
• the lower layer control signal determination unit 254 determines whether the ID stored in the input assignment notification matches the ID of the mobile station. If the ID stored in the assignment notification matches the ID of the mobile station, the transmission data generation unit 256 transmits the control signal of the upper layer on the USCH according to the MCS stored in the assignment notification.
• mobile station 200 can transmit the control signal of the upper layer using a band of about 1 M using USCH.
• the base station 100 can reduce the transmission power consumed by the mobile station 200 by allocating a band to the control signal of the upper layer according to the amount of information thereof.
• a line is established during communication, and other communication can not be stopped.
• voice since voice is also a packet, its transmission can be temporarily stopped. For example, about 20 msec to 50 msec, it is permissible to temporarily stop transmission.
• control signals can be transmitted.
• the mobile station 200 transmits the reservation control CH, and after transmitting the USCH, transmits the control channel of the upper layer.
• the base station 100 is provided with a traffic condition notification unit that measures the traffic condition and notifies the mobile station 200 of the result, and the mobile station 200 is notified of the notified traffic condition. Based, let's send the control signal of the upper layer.
• the mobile station 200 causes the transmission data generation unit 256 to directly transmit a high-speed control channel without performing a reservation procedure.
• transmission of control signals has been described separately for downlink and uplink.
• the section 152 and the channel assignment section 154 have been described.
• the downlink scheduling unit A heavy unit 128, an upper layer control signal determination unit 152, and a channel assignment unit 154 may be provided.
• the base station, mobile station, mobile communication system, and control signal transmission control method according to the present invention can be applied to a mobile communication system.

Landscapes

• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Quality & Reliability (AREA)
• Computer Security & Cryptography (AREA)
• Mobile Radio Communication Systems (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=37086729

Family Applications (1)

Country Status (9)

Families Citing this family (6)

Citations (4)

Family Cites Families (16)

• 2005
  • 2005-03-31 JP JP2005102872A patent/JP4640786B2/ja not_active Expired - Fee Related
• 2006
  • 2006-03-20 US US11/909,673 patent/US8391146B2/en not_active Expired - Fee Related
  • 2006-03-20 KR KR20077023254A patent/KR101204392B1/ko not_active Expired - Fee Related
  • 2006-03-20 WO PCT/JP2006/305514 patent/WO2006109438A1/ja not_active Ceased
  • 2006-03-20 KR KR1020127021394A patent/KR101205798B1/ko not_active Expired - Fee Related
  • 2006-03-20 EP EP06729482A patent/EP1883261A4/en not_active Withdrawn
  • 2006-03-20 BR BRPI0609588-7A patent/BRPI0609588A2/pt not_active IP Right Cessation
  • 2006-03-20 CN CNA2006800148924A patent/CN101171865A/zh active Pending
  • 2006-03-20 RU RU2007136028A patent/RU2405283C2/ru not_active IP Right Cessation
  • 2006-03-23 TW TW095110082A patent/TW200644680A/zh not_active IP Right Cessation
• 2010
  • 2010-09-10 US US12/879,843 patent/US20110002235A1/en not_active Abandoned

Patent Citations (4)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events