CN100525306C - Real-time protocol text transmission method in wineless communication system - Google Patents
Real-time protocol text transmission method in wineless communication system Download PDFInfo
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Abstract
The method includes procedures: after being sent to general land wireless access system, RTP messages are divided to RTP compression message and other RTP messages except RTP compression message based on compression condition; through different transmission channels, the method sends RTP compression message and other RTP messages to user device. When transferring RTP message through UU interface of wireless communication system, the method maps compression message and other RTP messages to different transmission channels to send respectively so as to overcome issues of time delay of RTP message on UU interface, and wasting of resources. The invention raises transmission quality of real time service in wireless communication system.
Description
Technical field
The present invention relates to wireless communication technology, refer to the transmission method of RTP message in a kind of wireless communication system especially.
Background technology
At present, the IP technology is used widely at wireless communication fields such as 3G systems, such as WCDMA system, TD-SCDMA system.In IP communication, the real time business message such as packet voice (VoIP) etc., is to transmit by real-time protocol (RTP) (RTP, Real Time Protocol).The RTP message is based on the carrying that User Datagram Protoco (UDP)/Internet protocol (UDP/IP) provides, and each header takies 40 or 60 bytes, and wherein the head of IPv4 has 40 bytes, and IPv6 has 60.What Fig. 1 showed is the long form of RTP message, the IP head takies 20/40 byte, and the UDP head takies 8 bytes, and the RTP head takies 12 bytes, the byte number that the payload of bearer service takies is less relatively, only takies 32 bytes such as the payload of VoIP business.As can be seen, the RTP header occupies very big ratio in whole message.
In the WCDMA system, the RTP message generally is transferred to subscriber equipment (UE) by general land wireless access system (UTRAN) and user device interface (UU), the protocol architecture of UU interface is layering, is followed successively by: packet data polymerized agreement (PDCP) layer, Radio Link control (RLC) layer, medium access control (MAC) layer and physics (PHY) layer.In above-mentioned protocol hierarchy, lower floor can pass through service access point (SAP, Service Access Point) provides service to the upper strata, and each SAP has self characteristics and parameter.
In the parameter that influences the RTP message transmissions, a most important parameter is the transmission format composite set (TFCS) of transmission channel (Transport Channel).The TFCS parameter comprises transmission block size (TB size), is used for allowing on the predetermined channel each data block size of transmission; Transmission block number (TB Number) is used to stipulate each data block number that transmits; Transmission Time Interval (TTI) is used for regulation and carries out once transmission every how long, and these parameters have determined the transmission bandwidth and the transmission rate of RTP message.
In the transmission channel of agreement regulation, because TB Size, TBNumber and the TTI of dedicated transmission channel (DCH) fix, and the message size of real time business and transmission intercal are generally also fixed, so use the DCH channel to transmit RTP real time business message in standard on the UU interface, what Fig. 2 showed is the structure of transmitting the RTP message at the UU interface.
Wherein, after the real-time RTP message on the IP enters UTRAN, arrive earlier the PDCP layer, described PDCP layer is provided at services such as transmission on the radio bearer (RB), compression for the RTP message.At this moment, the PDCP layer can be configured to the RTP message RTP compressed packet or all the other the RTP messages except that the RTP compressed packet as required, does not compress/half compressed packet etc. such as RTP.Perhaps, the RTP message had been configured to RTP compressed packet or all the other RTP messages before entering UTRAN, repeat no more herein.
Subsequently, treated RTP message is sent to rlc layer, carries out operations such as message fragment, reorganization, affirmation re-transmission, ordering and Flow Control, and goes up transmission at dedicated service logic channel (DTCH).
Then, the RTP message is dispatched by the MAC layer, and with the RTP message from the DTCH channel Mapping to the DCH channel.
At last, the DPCH (DPCH) that provides via the PHY layer of RTP message is sent to UE.
In the said process, will be called the real-time RTP message on the IP through the RTP message after UDP and the IP encapsulation.
Because the data content in the RTP/UDP/IP head generally is constant in transmission course, in order to improve efficiency of transmission, the bandwidth capacity that saving is eated dishes without rice or wine and the frequency spectrum resource of wireless channel can adopt the mode of point-to-point compressed rtp/UDP/IP head to transmit.
In RTP real-time packet transmission course, just only transmit not compressed packet in order to carry out compression negotiation when message just begins to transmit, all the other times all are at the transmission compressed packet.In addition, if in transmission course, lose compressed packet, cause compressed information can't be at two ends synchronously, when receiving terminal can't decompress, transmitting terminal also need transmission compression/half compressed packet to carry out compressed information synchronous, wherein half compression refers to the content part in the RTP message is compressed.
After introducing the RTP/UDP/IP header suppression, two kinds of RTP messages that transmission intercal is identical and not of uniform size occurred: RTP compressed packet and RTP do not compress/half compressed packet.When these messages are staggered when occurring, will cause following point: (1) if compression and not compressed packet on same DCH channel, transmit, compressed packet does not just need burst, sends in batches, this will make the propagation delay time increasing, and may cause message dropping; (2) give not compressed packet if allocate big bandwidth in advance, after compression negotiation is finished, adopt and transmit the waste that compressed packet can cause Radio Resource and bandwidth in the same way.
In order to solve the compressed packet and the problem that varies in size and cause of compression/half compressed packet, prior art adopts following several method:
Method one, use main scrambler (PSC, Primary Scrambling Code) and time scrambler (SSC, Secondary Scrambling Code) on same transmission channel, to distinguish compressed packet and compress/half compressed packet.
This method is specially: with PSC and SSC the physical channel of same DCH channel Mapping is divided into primary physical channel and time physical channel, give the RTP compressed packet with the primary physical channel allocation of PSC correspondence, primary physical channel that PSC and SSC is corresponding respectively and time physical channel are all distributed to RTP and are not compressed/half compressed packet.When transmission RTP compressed packet, only use the primary physical channel of PSC correspondence; When transmission RTP do not compress/during half compressed packet, use the primary physical channel of PSC correspondence and the inferior physical channel of SSC correspondence simultaneously.
The shortcoming of this method is: the signal that adopts PSC and SSC will increase in the sub-district simultaneously disturbs, and reduces cell capacity, and increases the decoding complex degree of UE.
Method two, radio bearer are reshuffled (Radio Bearer Reconfiguration)
This method is specially: a, the transmission parameter of initial DCH channel is made as the state that is fit to the transmission compressed packet.B, in the time will transmitting not compression/half compressed packet, RRC signaling by chain of command (C-Plane), initiating radio bearer between RNC and UE reshuffles, DCH channel and DPCH channel are reconfigured, increase channel width and transmission block size, do not compress to reach timely transmission/purpose of half compressed packet.C, compression/half compressed packet end of transmission are initiated Radio BearerReconfiguration once more, with DCH channel and DPCH channel configuration to the state that is fit to the transmission compressed packet.
Owing to radio link reconfiguration need be carried out repeatedly Signalling exchange between RNC and UE, need cost hundreds of millisecond to arrive several seconds time so carry out once to reshuffle, this can increase propagation delay time, the expansion delay variation of RTP real-time packet.When the Radio Resource in the system is comparatively nervous, to reshuffle also and may fail, this moment, the UU interface can only use original low bandwidth channel transmission data, thereby reduced the performance of real time business.
Method three, utilize the burst recombination function of Radio Link control unacknowledged mode (RLC UM)
With the TFCS parameter setting of DCH channel is to meet the state that transmits compressed packet, and when the needs transmission was not compressed/half compressed packet, RLC UM carried out message fragment automatically, and timesharing sends these bursts.The rlc layer of receiving terminal is recombinated the burst that receives, and recovers original message.
This method can increase propagation delay time, the expansion delay variation of RTP message equally, and Loss Rate can improve behind the message fragment, has more reduced efficiency of transmission, can't guarantee professional real-time.
Summary of the invention
In view of this, main purpose of the present invention is to provide the transmission method of RTP message in a kind of wireless communication system, transmits problems such as the propagation delay time of initiation and delay variation increasing to overcome compressed packet and not compress/half compressed packet on the UU interface.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
The transmission method of real-time protocol (RTP) message in a kind of wireless communication system, this method may further comprise the steps:
After real-time protocol (RTP) RTP message is delivered to general land wireless access system, be divided into RTP compressed packet and all the other the RTP messages except that the RTP compressed packet according to the compression situation, and send RTP compressed packet and all the other RTP messages respectively to subscriber equipment by different transmission channels.
Described all the other RTP messages are that RTP does not compress/half compressed packet.
Described division RTP method of message is: the media access control layer of general land wireless access system writes down the RTP compressed packet in advance and RTP does not compress/and the size of half compressed packet, then this media access control layer is distinguished RTP compressed packet and RTP and is not compressed/half compressed packet according to the transmission block size of the RTP message that receives.
Described media access control layer sets in advance compressed packet formation and not compression/half compressed packet formation;
Then described division RTP method of message is: after the wireless chain control layer of general land wireless access system receives the RTP message, distinguish RTP compressed packet and RTP and do not compress/half compressed packet, and send into the compressed packet formation of media access control layer and not compression/half compressed packet formation preservation respectively.
Described wireless chain control layer do not compress RTP/and half compressed packet is saved in before not compression/half compressed packet formation, this method further comprises: wireless chain control layer does not compress RTP/half compressed packet burst according to the protocol Data Unit size of media access control layer.
Described division RTP method of message is: the packet data polymerized protocol layer of general land wireless access system is according to the header information of the RTP message that receives, described RTP message is divided into the RTP compressed packet and RTP does not compress/half compressed packet, and the RTP compressed packet delivered to the first dedicated service logic channel, RTP is not compressed/half compressed packet delivers to the second dedicated service logic channel, by the first dedicated service logic channel and the second dedicated service logic channel respectively RTP compressed packet and RTP are not compressed/half compressed packet delivers to media access control layer.
Described by different transmission channels send the RTP compressed packet respectively and RTP do not compress/method of half compressed packet is: media access control layer is delivered to dedicated transmission channel with the RTP compressed packet, and by dedicated transmission channel the RTP compressed packet is mapped to DPCH and sends to subscriber equipment;
Simultaneously, media access control layer do not compress RTP/half compressed packet delivers to high-speed downlink shared transmission channel, and by high-speed downlink shared transmission channel RTP is not compressed/half compressed packet is mapped to high-speed physical downlink shared channel (HS-PDSCH), sends to subscriber equipment.
The transmission format composite set parameter of dedicated transmission channel is set according to RTP compressed packet size in advance, and then described dedicated transmission channel sends the RTP compressed packet according to set transmission format composite set parameter;
In advance according to RTP do not compress/half compressed packet size is provided with the transmission format composite set parameter of high-speed downlink shared transmission channel, then described high-speed downlink shared transmission channel sends RTP according to set transmission format composite set parameter and does not compress/half compressed packet.
RTP is not compressed/half compressed packet delivers to before the high-speed downlink shared transmission channel, this method further comprises: RTP is set not to be compressed/priority of half compressed packet, and then high-speed downlink shared transmission channel sends RTP according to priority and do not compress/half compressed packet.
Described by different transmission channels send the RTP compressed packet respectively and RTP do not compress/method of half compressed packet is:
Media access control layer is delivered to main dedicated transmission channel with the RTP compressed packet, and is mapped to the DPCH of using main scrambler; Media access control layer do not compress RTP/and half compressed packet delivers to time dedicated transmission channel, and is mapped to the DPCH of using time scrambler;
Staggered use main scrambler and time scrambler to send the RTP compressed packet respectively and RTP do not compress/half compressed packet is to subscriber equipment.
As seen from the above technical solution, the transmission method of RTP message in this wireless communication system of the present invention, when UU interface transmission RTP message, with compressed packet and the compression/half compressed packet shunt, be mapped to respectively on the different transmission channels and send, thereby overcome the RTP message in problems such as the propagation delay time of UU interface and delay variation increasings, improved real time business at wireless communication system, such as the transmission quality in WCDMA system and the TD-SCDMA system.
In addition, method of the present invention does not need for RTP does not compress/half compressed packet bandwidth reserved, thereby reduces the bandwidth waste of UU interface, and improving RTP does not compress/and half compressed packet is in the reliability of UU interface transmission.
Description of drawings
Fig. 1 is the long form of RTP message in the prior art;
Fig. 2 is a structure of transmitting the RTP message in the prior art at the UU interface;
Fig. 3 is a structure of transmitting the RTP message in the first embodiment of the invention at the UU interface;
Fig. 4 is a structure of transmitting the RTP message in the second embodiment of the invention at the UU interface;
Fig. 5 is a structure of transmitting the RTP message in the third embodiment of the invention at the UU interface.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
According to the 3GPP standard, a logic channel can be mapped on a plurality of different transmission channels simultaneously, so among the present invention, the RTP message is divided into the RTP compressed packet and RTP does not compress/half compressed packet, and be mapped to different transmission channel respectively and send, thereby compressed packet and on same transmission channel, interlock problems such as time delay, the wasting of resources of transport tape of compression/half compressed packet have been overcome.
Embodiment one,
Shown in Figure 3 is the structure of UU interface transmission RTP message in the present embodiment, and wherein the DCH transmission channel only is used for transmitting the RTP compressed packet, and RTP is not compressed/transmission of half compressed packet usefulness HS-DSCH transmission channel, and concrete implementation can have following several:
(1), the TFCS parameter with the DCH channel designs according to the RTP compressed packet in advance, is set to RTP compressed packet size etc. such as TB Size, so that send the RTP compressed packet specially; At the HS-DSCH channel one cover TFCS parameter is set, since all data of sending to the HS-DSCH channel all will be earlier through the processing of MAC layer, and the size of each data all will meet the protocol Data Unit size (PDU Size) of MAC layer, so with PDU Size according to RTP do not compress/half compressed packet designs, to adapt to the not transmission requirement of compression/half compressed packet.Based on above-mentioned setting, the transmission course of RTP message is specially:
1, after RLC UM receives the RTP message, directly this message is submitted to the MAC layer.In this step, RLC UM need not to RTP do not compress/half compressed packet carries out burst.
2, the MAC layer in advance the recording compressed message and not the compression/half compressed packet size, and the corresponding relation of message size and transmission channel is set, the data block that is specially the compressed packet size is by the DCH Channel Transmission, the data block of compression/half compressed packet size is not by the HS-DSCH Channel Transmission, after then described MAC layer receives the RTP message, determine transmission channel according to the data block size.
The follow-up sending method of compressed packet is same as the prior art, repeats no more herein.For not compressing/half compressed packet, the HS-DSCH channel can be mapped to it high-speed physical downlink shared channel (HS-PDSCH) (HS-PDSCH) and send to UE.
Stipulate in the agreement that the MAC layer is divided into medium access control special use (MAC-d) sublayer again and (MAC-hs) sublayer is shared in the medium access control at a high speed.Wherein, the MAC-d sublayer is positioned at RNC, is used to carry out message in other scheduling and multiplexing of UE level; The MAC-hs sublayer is positioned at NodeB, carries out the scheduling of message in cell level.Data block during to the MAC layer, arrives the MAC-d sublayer by the DTCH Channel Transmission earlier, and directly data block is delivered to the DCH transmission channel by the MAC-d sublayer, and the data block of MAC-d sublayer will just can be sent to the HS-DSCH channel by the MAC-hs sublayer.
(2), be compressed packet and do not compress/half compressed packet and set up storage queue respectively that at the MAC layer then the transmission course of RTP message is specially in advance:
After 1, RLC UM receives the RTP message, compressed packet is delivered to the compressed packet formation of MAC layer and preserved, and will not compress/half compressed packet delivers to the not compression/half compressed packet formation of MAC layer.
In the said process, whether RLC UM can also will not compress according to the PDU Size of MAC layer decision/half compressed packet burst after, be saved in again in the not compression/half compressed packet formation of MAC layer.
2, the MAC layer sends to the DCH transmission channel with the RTP compressed packet in the compressed packet formation, the message that does not compress in/half compressed packet formation is sent to the HS-DSCH transmission channel, these two transmission channels are mapped to the message that receives respectively on self corresponding physical channel, be transferred to subscriber equipment, do not give unnecessary details herein.
In the present embodiment, the TFCS parameter of DCH channel is fixed as and is applicable to the transmission compressed packet, so the bandwidth of the DPCH physical channel that the DCH channel is shone upon is also fixed, does not so just need to adopt time scrambler for not compressing/half compressed packet bandwidth reserved.Simultaneously, because the DCH channel only transmits the RTP compressed packet, so can not increase propagation delay time, expansion delay variation at the UU interface.
The HS-DSCH channel has following characteristics: transport tape is roomy, can share for a plurality of users; TTI is short, only is 2ms; Have functions of retransmission, can select suitable modulation and channel coding method according to the channel conditions of UE; Can carry out fast dispatch.
At These characteristics, utilize HS-DSCH Channel Transmission RTP do not compress/half compressed packet has following benefit:
(1) RTP do not compress/half compressed packet belongs to burst flow, do not send with constant rate of speed, big flow is only arranged, and the HS-DSCH channel can transmit the big data quantity message in a TTI in certain short time, so satisfied RTP and do not compress/requirement of half compressed packet non-fragmentation transmission.
(2) do not compress at HS-DSCH channel RTP/during half compressed packet, do not need to be above-mentioned message reserved resource, only need these priority of messages are made as maximum, just can guarantee that they are by priority scheduling, transmission in time.Do not have RTP do not compress/when half compressed packet need send, the bandwidth resources of HS-DSCH channel can be dispatched to other service message and be used, and so just can not cause bandwidth waste.
(3) TTI of HS-DSCH channel short (2ms) does not compress/the quick transmission of half compressed packet so can guarantee RTP.
(4) since RTP do not compress/half compressed packet has compressed information, its significance level is than RTP compressed packet height, use HS-DSCH Channel Transmission RTP not compress/half compressed packet, just can utilize the functions of retransmission of HS-DSCH channel, thereby guarantee that to a certain extent RTP does not compress/reliable transmission of half compressed packet.
When practical application since the RTP compressed packet do not compress with RTP/half compressed packet sends by different transmission channels, so above-mentioned message may not can according to the genesis sequence arrival receiving terminal of transmitting terminal.But, because transmitting terminal is same RLC UM entity for all RTP messages uses, the RLC sequence number of different messages (SN, Sequence Number) is unified numbering, receiving terminal just can prevent compressed information and data flow confusion as long as the RLC sequence number is checked.
Embodiment two,
Shown in Figure 4 is the structure of UU interface transmission RTP message in the present embodiment.At first, main DCH channel Mapping to the DPCH channel that uses PSC, is used to transmit the RTP compressed packet; Inferior DCH channel Mapping to the DPCH channel that uses SSC, is used to transmit RTP and does not compress/half compressed packet.Then, staggeredly in the sub-district using PSC and SSC sends the RTP compressed packet respectively and RTP does not compress/half compressed packet is to UE.At this moment, RTP do not compress/half compressed packet only uses the DPCH channel of SSC correspondence to send.
Because PSC and SSC are staggered the use in the sub-district, and the situation that can not occur using simultaneously so this method need not receive two scramblers simultaneously, can reduce the decoding complex degree of UE.
Embodiment three,
In the present embodiment, RTP compressed packet and RTP are not compressed/method that half compressed packet is shunted at the UU interface is specially: distinguish the RTP compressed packet according to header information and RTP does not compress/half compressed packet at the PDCP layer, the RTP compressed packet is distributed to a DTCH logic channel, RTP is not compressed/half compressed packet is distributed to the 2nd DTCH logic channel, and concrete structure is seen Fig. 5.
The one DTCH logic channel is delivered to the DCH Channel Transmission by the MAC layer with the RTP compressed packet, and subsequent process is identical with embodiment one, repeats no more herein.
The 2nd DTCH logic channel by the MAC layer RTP is not compressed/half compressed packet delivers to the HS-DSCH Channel Transmission, subsequent process is also identical with embodiment one, repeats no more herein.
In addition, at the PDCP layer RTP compressed packet and RTP are not compressed/half compressed packet shunting after, can also carry out following operation:
By a DTCH logic channel RTP compressed packet is delivered to main DCH channel, and the RTP compressed packet is mapped on the DPCH channel that uses PSC, send to UE by main DCH channel;
By the 2nd DTCH logic channel RTP is not compressed/half compressed packet delivers to time DCH channel, and by inferior DCH channel RTP is not compressed/half compressed packet is mapped on the DPCH channel that uses SSC, sends to UE.
By the above embodiments as seen, the transmission method of RTP message in this wireless communication system of the present invention, when the UU of wireless communication system interface transmission RTP message, compressed packet is mapped to respectively on the different transmission channels and sends with compression/half compressed packet not, thereby overcome the RTP message in problems such as the time delay of UU interface, the wastings of resources, improved the transmission quality of real time business in wireless communication system.
Claims (10)
1, the transmission method of real-time protocol (RTP) message in a kind of wireless communication system is characterized in that this method may further comprise the steps:
After real-time protocol (RTP) RTP message is delivered to general land wireless access system, be divided into RTP compressed packet and all the other the RTP messages except that the RTP compressed packet according to the compression situation, and send RTP compressed packet and all the other RTP messages respectively to subscriber equipment by different transmission channels.
2, method according to claim 1 is characterized in that, described all the other RTP messages are that RTP does not compress/half compressed packet.
3, method according to claim 2, it is characterized in that, described division RTP method of message is: the media access control layer of general land wireless access system writes down the RTP compressed packet in advance and RTP does not compress/and the size of half compressed packet, then this media access control layer is distinguished RTP compressed packet and RTP and is not compressed/half compressed packet according to the transmission block size of the RTP message that receives.
4, method according to claim 2 is characterized in that, described media access control layer sets in advance compressed packet formation and not compression/half compressed packet formation;
Then described division RTP method of message is: after the wireless chain control layer of general land wireless access system receives the RTP message, distinguish RTP compressed packet and RTP and do not compress/half compressed packet, and send into the compressed packet formation of media access control layer and not compression/half compressed packet formation preservation respectively.
5, method according to claim 4, it is characterized in that, described wireless chain control layer do not compress RTP/and half compressed packet is saved in before not compression/half compressed packet formation, this method further comprises: wireless chain control layer does not compress RTP/half compressed packet burst according to the protocol Data Unit size of media access control layer.
6, method according to claim 2, it is characterized in that, described division RTP method of message is: the packet data polymerized protocol layer of general land wireless access system is according to the header information of the RTP message that receives, described RTP message is divided into the RTP compressed packet and RTP does not compress/half compressed packet, and the RTP compressed packet delivered to the first dedicated service logic channel, RTP is not compressed/half compressed packet delivers to the second dedicated service logic channel, by the first dedicated service logic channel and the second dedicated service logic channel respectively RTP compressed packet and RTP are not compressed/half compressed packet delivers to media access control layer.
7, according to each described method of claim 3 to 6, it is characterized in that, described by different transmission channels send the RTP compressed packet respectively and RTP do not compress/method of half compressed packet is: media access control layer is delivered to dedicated transmission channel with the RTP compressed packet, and by dedicated transmission channel the RTP compressed packet is mapped to DPCH and sends to subscriber equipment;
Simultaneously, media access control layer do not compress RTP/half compressed packet delivers to high-speed downlink shared transmission channel, and by high-speed downlink shared transmission channel RTP is not compressed/half compressed packet is mapped to high-speed physical downlink shared channel (HS-PDSCH), sends to subscriber equipment.
8, method according to claim 7, it is characterized in that, the transmission format composite set parameter of dedicated transmission channel is set according to RTP compressed packet size in advance, and then described dedicated transmission channel sends the RTP compressed packet according to set transmission format composite set parameter;
In advance according to RTP do not compress/half compressed packet size is provided with the transmission format composite set parameter of high-speed downlink shared transmission channel, then described high-speed downlink shared transmission channel sends RTP according to set transmission format composite set parameter and does not compress/half compressed packet.
9, method according to claim 7, it is characterized in that, RTP is not compressed/half compressed packet delivers to before the high-speed downlink shared transmission channel, this method further comprises: RTP is set not to be compressed/priority of half compressed packet, and then high-speed downlink shared transmission channel sends RTP according to priority and do not compress/half compressed packet.
10, according to each described method of claim 3 to 6, it is characterized in that, described by different transmission channels send the RTP compressed packet respectively and RTP do not compress/method of half compressed packet is:
Media access control layer is delivered to main dedicated transmission channel with the RTP compressed packet, and is mapped to the DPCH of using main scrambler; Media access control layer do not compress RTP/and half compressed packet delivers to time dedicated transmission channel, and is mapped to the DPCH of using time scrambler;
Staggered use main scrambler and time scrambler to send the RTP compressed packet respectively and RTP do not compress/half compressed packet is to subscriber equipment.
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Effective date of registration: 20211223 Address after: 450046 Floor 9, building 1, Zhengshang Boya Plaza, Longzihu wisdom Island, Zhengdong New Area, Zhengzhou City, Henan Province Patentee after: Super fusion Digital Technology Co.,Ltd. Address before: 518129 Bantian HUAWEI headquarters office building, Longgang District, Guangdong, Shenzhen Patentee before: HUAWEI TECHNOLOGIES Co.,Ltd. |