CN110830170A - Data transmission method based on ROHC compression in satellite communication - Google Patents
Data transmission method based on ROHC compression in satellite communication Download PDFInfo
- Publication number
- CN110830170A CN110830170A CN201911102043.XA CN201911102043A CN110830170A CN 110830170 A CN110830170 A CN 110830170A CN 201911102043 A CN201911102043 A CN 201911102043A CN 110830170 A CN110830170 A CN 110830170A
- Authority
- CN
- China
- Prior art keywords
- rohc
- data
- base station
- satellite
- data packet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
-
- 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
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
Abstract
The invention relates to a data transmission method based on ROHC compression in satellite communication, belonging to the technical field of satellite communication compression and data transmission. The uplink transmission comprises a) user terminal UE sends a session establishment request, and a ground gateway station distributes TEID; b) the user terminal ROHC compresses data; c) data are transmitted to a lower layer and are transmitted to a satellite base station; d) the satellite base station receives the data and processes the data to obtain an ROHC data packet; e) the satellite base station transmits the data packet to a gateway station; f) decompressing the gateway station ROHC to obtain data; the downlink transmission comprises 1) UE sends a session establishment request, and a gateway station distributes TEID; 2) gateway station ROHC compressed data; 3) the gateway station transmits the data packet to the satellite base station; 4) the satellite base station forwards the data to the UE; 5) the user terminal ROHC decompresses to obtain data. The method reduces the satellite-ground feed link overhead of the 4G LTE protocol stack applied to the satellite communication system, and improves the frequency spectrum utilization rate.
Description
Technical Field
The invention relates to a data transmission method based on ROHC compression in satellite communication, belonging to the technical field of compression and data transmission in satellite communication.
Background
4G LTE has been a well established communication technology through a long commercial application. With the continuous development of the modern satellite mobile communication technology, the satellite communication has the advantages of wide coverage, large capacity, no influence of geographical conditions and the like, and becomes one of the most potential mobile communication technologies in the future. At present, the convergence of a ground mobile network and a satellite communication network has become a hot research direction, and the application of a 4G LTE protocol stack to a satellite communication system is an important research topic.
Different from the traditional 4G LTE communication system, the connection between a base station and a core network is established through a ground wired link; in a satellite communication system, a satellite base station and a ground gateway station establish a connection through a satellite-ground feeder link. For a general IPv4/UDP/RTP protocol data packet, the length of a packet header is 40 bytes; for IPv6/UDP/RTP protocol data packets, the length of the packet header is 60 bytes. The 4G LTE protocol stack is directly applied to a satellite communication system, so that a data packet with a long packet header is transmitted between a satellite base station and a ground gateway, a large wireless channel bandwidth is occupied, and the effectiveness of the communication system is reduced. The effectiveness of data transmission methods for satellite communication systems is therefore to be further improved.
Disclosure of Invention
The invention aims to provide a data transmission method based on ROHC compression for satellite communication, aiming at the technical current situation that the effective rate of a satellite-ground feeder link is low and the space is still improved in the data transmission in the existing satellite communication system.
Wherein, ROHC, namely Robust Header Compression, refers to Robust Header Compression; a satellite-to-ground feeder link refers to a link between a satellite base station and a ground gateway station.
The core idea of the data transmission method based on ROHC compression is as follows: a 4G LTE protocol stack satellite-ground converged network architecture based on ROHC compression is adopted, as shown in FIG. 1; the user terminal of the converged network architecture follows a 4G LTE user plane protocol; but the PDCP layer of the satellite base station does not carry out ROHC compression and decompression; in an uplink, the satellite base station sends a data packet with an ROHC compression head to the ground gateway station, and ROHC decompression is carried out on the ground gateway station; in the downlink, the ground gateway station performs ROHC header compression, and then transmits the data packet with the ROHC header to the user terminal via the satellite base station.
The data transmission method based on ROHC compression in the satellite communication comprises uplink transmission and downlink transmission;
the uplink transmission, i.e. the process that the user terminal sends uplink data to the satellite base station and then the satellite base station forwards the uplink data to the ground gateway station, specifically comprises the following steps:
s10: a user terminal sends a session establishment request to a ground gateway station through a satellite base station, and the ground gateway station distributes uplink and downlink tunnel endpoint identifiers TEID to the satellite base station and the user terminal;
wherein, the Tunnel Endpoint Identifier, i.e. Tunnel Endpoint Identifier, is abbreviated as TEID; the PDCP layer of the user terminal comprises an ROHC compressor;
s11: the PDCP layer of the user terminal receives the data transmitted from the upper layer protocol, and carries out ROHC head compression, the ROHC compressor judges the protocol type of the data packet, and determines a profile identification PID according to a profile identification table specified by ROHC; searching a corresponding context identifier CID in a context list according to the PID of the data packet to obtain context; performing header compression on the data packet according to the current compressor state and context to obtain a compressed ROHC data packet;
wherein, profile is profile; profile identification, Profile ID, abbreviated PID; a Context identifier, i.e., Context ID, abbreviated CID;
s12: the ROHC data packet compressed in the step S11 enters a Low-PDCP layer, a PDU of the PDCP layer is formed by encrypting and adding a PDCP packet header, and the PDU is transmitted into an RLC, an MAC and a PHY layer and is transmitted to the satellite base station through a user link;
wherein, the functions of the Low-PDCP in the user plane include: adding/removing PDCP header and encryption/decryption to the data packet, and compressing with ROHC header to form complete PDCP layer; the PDU, namely a Protocol Data Unit, refers to a Protocol Data Unit; the user link refers to a link between a user terminal and a satellite base station;
s13: after receiving PDCP PDU transmitted by PHY, MAC and RLC layers of a satellite base station end, a Low-PDCP layer of the satellite base station removes PDCP packet headers and decrypts the PDCP PDU to obtain a data packet with an ROHC packet header;
s14: the satellite base station sends a data packet with an ROHC packet header to the ground gateway station through a satellite-ground feed link according to an uplink identification TEID distributed by the ground gateway station;
wherein, the ground gateway station comprises an ROHC decompressor;
s15: after receiving ROHC data sent by a satellite base station, a ground gateway station carries out ROHC decompression processing to obtain data; after receiving ROHC data packet, decompressor finds out proper context in the context list according to PID of the data packet; decompressing a data packet header by combining context, submitting an upper layer protocol, and completing uplink data transmission;
the downlink transmission, namely the process that the ground gateway station sends downlink data to the satellite base station and then the satellite base station forwards the downlink data to the user terminal, comprises the following steps:
s20: a user terminal sends a session establishment request to a ground gateway station through a satellite base station, and the ground gateway station distributes uplink and downlink tunnel endpoint identifiers TEID to the satellite base station and the user terminal;
wherein the ground gateway station comprises an ROHC compressor;
s21: the ground gateway station performs ROHC header compression on data transmitted by an upper layer protocol: the compressor judges the protocol type of the data packet and determines PID according to a profile identification table specified by ROHC; searching a corresponding CID in the context list according to the PID of the data packet to obtain context; performing header compression on the data packet according to the current compressor state and context;
s22: the ground gateway station sends a data packet with an ROHC packet header to a satellite base station through a satellite-ground feed link according to the distributed downlink identification TEID;
s23: after receiving data with ROHC packet headers transmitted by a PHY, MAC and RLC layer of a satellite base station end, a Low-PDCP layer of the satellite base station encrypts and adds the PDCP packet headers to obtain PDCP PDUs; the PDCP PDU is delivered to a bottom layer protocol and is sent to a user terminal through a user link;
wherein, the PDCP layer of the user terminal comprises an ROHC decompressor;
s24: the user terminal PDCP layer carries out PDCP header removal, decryption and ROHC decompression processing on the data packet passing through the user terminal PHY, MAC and RLC layers; after receiving ROHC data packet, decompressor finds out proper context in context list according to PID of data packet; and decompressing the data packet header by combining the context, submitting an upper layer protocol, and finishing downlink data transmission.
Advantageous effects
Compared with the prior art, the data transmission method based on ROHC compression in satellite communication has the following beneficial effects:
1. aiming at data transmission of a satellite communication system, the data transmission method designs a 4G LTE protocol stack satellite-ground fusion network architecture based on ROHC compression, and solves the problem that the traditional 4G LTE protocol stack is applied to the satellite communication system to bring huge link overhead;
2. the data transmission method of the invention fully utilizes the robust packet header compression technology, reduces the cost of a feed link between the satellite base station and the gateway station, namely a satellite-ground feed link, and improves the frequency spectrum utilization rate.
Drawings
Fig. 1 is a 4G LTE protocol stack satellite-ground convergence network architecture on which a data transmission method based on ROHC compression in satellite communication relies;
fig. 2 is a schematic diagram of a low-earth orbit voice satellite communication system according to an embodiment of a data transmission method based on ROHC compression in satellite communication.
Detailed Description
The following describes in detail a specific implementation of a data transmission method based on ROHC compression in satellite communication according to the present invention with reference to the accompanying drawings and examples.
Example 1
The low orbit satellite voice communication system based on the ROHC compression data transmission method in the satellite communication is shown in figure 2, the orbit height of a communication satellite is 1200km, and the low orbit satellite voice communication system and a ground communication network jointly provide voice transmission services for users.
In the communication system, a user section terminal is a mobile phone A, a space section satellite base station is a low-orbit communication satellite B, and a ground section gateway station is a gateway station C. The specific scene is as follows: the mobile phone A is switched to a ground gateway station C through a low-orbit communication satellite B and is accessed to a ground communication network; uplink data transmission is performed to the ground gateway station C via the low earth orbit satellite base station B. In this scenario, the specific implementation of the uplink data transmission method for the satellite system of the present invention includes the following steps:
u0: a user terminal mobile phone A sends a session establishment request to a ground gateway station C through a low earth orbit communication satellite B, and the ground gateway station C distributes uplink and downlink tunnel endpoint identifications TEID to the low earth orbit communication satellite B and the user terminal mobile phone A;
u1: the PDCP layer of the user terminal mobile phone A receives a data packet with an IPv4/UDP/RTP header transmitted from an upper layer protocol, wherein the header length H of the data packet is 40bytes, and the load size L is 20 bytes. The compressor judges the protocol type of the data packet to be IP/UDP/RTP, and determines PID to be 0x0001 according to a profile identification table specified by ROHC; according to the fact that the PID of the data packet is 0x0001, searching a corresponding CID in the context list to obtain context; performing header compression on the data packet according to the current compressor state and context to finally obtain the packet header length HrohROHC compressed packets for 6 bytes; its protocol header compression efficiency GHAnd transmission compression efficiency GPAre respectively as
U2: the ROHC data packet compressed in the step U11 enters a Low-PDCP layer, the encrypted and added PDCP packet header processing is carried out to form a PDU of the PDCP layer, and the PDU is transmitted into an RLC layer, an MAC layer and a PHY layer and is sent to a Low orbit communication satellite B through a user link;
u3: after receiving the PDCP PDU transmitted by a PHY layer, an MAC layer and an RLC layer of a satellite base station end, a Low-PDCP layer of a Low-orbit communication satellite B removes a PDCP packet header and decrypts the PDCP PDU to obtain a data packet with an ROHC packet header;
u4: the low-orbit communication satellite B sends a data packet with an ROHC packet header to the ground gateway station C through a satellite-ground feed link according to the uplink TEID distributed by the ground gateway station C;
u5: and after receiving the ROHC data sent by the low-orbit communication satellite B, the ground gateway station C carries out ROHC decompression processing to obtain the data. After receiving ROHC packet, decompressor finds out appropriate context information context in context list according to packet PID as 0x 0001; and decompressing the data packet header by combining the context, recovering the data packet header into a data packet of an IPv4/UDP/RTP packet header, wherein the length H of the packet header of the data packet is 40bytes, the load size L of the data packet is 20bytes, and delivering the IP data packet to an upper layer to finish uplink data transmission.
Example 2
The low earth orbit satellite voice communication system is shown in figure 2, the orbit height of the communication satellite is 1200km, and the low earth orbit satellite voice communication system and the ground communication network jointly provide voice transmission service for users.
In the communication system, a user section terminal is a mobile phone A, a space section satellite base station is a low-orbit communication satellite B, and a ground section gateway station is a ground gateway station C. The specific scene is as follows: the mobile phone A is switched to a ground gateway station C through a low-orbit communication satellite B and is accessed to a ground communication network; the ground gateway station C performs downlink data transmission to the user terminal handset a via the low earth orbit communication satellite B. In this scenario, the implementation of the downlink data transmission method of the satellite system of the present invention includes the following steps:
d0: a user terminal mobile phone A sends a session establishment request to a ground gateway station C through a low earth orbit communication satellite B, and the ground gateway station C distributes uplink and downlink tunnel endpoint identifications TEID to the low earth orbit communication satellite B and the ground terminal mobile phone A;
d1: the ground gateway station C performs ROHC header compression on the data packet with IPv4/UDP/RTP header transmitted from the upper layer protocol, wherein the header length H of the data packet is 40bytes, and the load size L is 20 bytes. The compressor judges the protocol type of the data packet to be IP/UDP/RTP, and determines PID to be 0x0001 according to a profile identification table specified by ROHC; searching a corresponding CID in the context list according to the PID of the data packet to obtain context; performing header compression on the data packet according to the current compressor state and context to obtain the packet header length HrohcData packet of 6bytes with protocol header compression efficiency GHAnd transmission compression efficiency GPAre respectively as
D2: the ground gateway station C sends a data packet with an ROHC packet header to a low-orbit communication satellite B through a satellite-ground feed link according to a downlink identification TEID distributed by the ground gateway station C;
d3: after receiving data with ROHC packet headers transmitted by a PHY layer, an MAC layer and an RLC layer of a satellite base station end, a Low-PDCP layer of a Low-orbit communication satellite B encrypts and adds the PDCP packet headers to obtain PDCP PDUs; the PDCP PDU is delivered to a bottom layer protocol and is sent to a user terminal mobile phone A through a user link;
d4: the PDCP layer of the user terminal mobile phone A carries out PDCP header removal, decryption and ROHC decompression processing on the data packet passing through the PHY, MAC and RLC layers of the user terminal; after receiving ROHC data packet, decompressor finds out proper context in context list according to PID 0x 0001; and decompressing the data packet header by combining the context, recovering the data packet header into a data packet of an IPv4/UDP/RTP packet header, wherein the packet header length H of the data packet is 40bytes, the load size L is 20bytes, and submitting the IP packet to an upper layer to complete downlink data transmission.
Finally, the above description is provided as an example of the present invention and should not be construed as limiting the present invention to the embodiment and the attached drawings. All equivalents and modifications which come within the spirit and scope of the disclosure are desired to be protected.
Claims (3)
1. A data transmission method based on ROHC compression in satellite communication is characterized in that: including uplink transmissions and downlink transmissions;
the uplink transmission, i.e. the process that the user terminal sends uplink data to the satellite base station and then the satellite base station forwards the uplink data to the ground gateway station, specifically comprises the following steps:
s10: a user terminal sends a session establishment request to a ground gateway station through a satellite base station, and the ground gateway station distributes uplink and downlink tunnel endpoint identifiers TEID to the satellite base station and the user terminal;
s11: the PDCP layer of the user terminal receives the data transmitted from the upper layer protocol, and carries out ROHC head compression, the ROHC compressor judges the protocol type of the data packet, and determines a profile identification PID according to a profile identification table specified by ROHC; searching a corresponding context identifier CID in a context list according to the PID of the data packet to obtain context; performing header compression on the data packet according to the current compressor state and context to obtain a compressed ROHC data packet;
wherein, profile is profile; profile identification, Profile ID, abbreviated PID; a context identifier, i.e. ContextID, abbreviated CID;
s12: the ROHC data packet compressed in the step S11 enters a Low-PDCP layer, a PDU of the PDCP layer is formed by encrypting and adding a PDCP packet header, and the PDU is transmitted into an RLC, an MAC and a PHY layer and is transmitted to the satellite base station through a user link;
wherein, the functions of the Low-PDCP layer in the user plane include: adding/removing PDCP header and encryption/decryption to the data packet, and compressing with ROHC header to form complete PDCP layer; the PDU, namely a Protocol Data Unit, refers to a Protocol Data Unit; the user link refers to a link between a user terminal and a satellite base station;
s13: after receiving the PDCP PDU transmitted by the PHY, MAC and RLC layers of the satellite base station, the Low-PDCP layer of the satellite base station removes the PDCP packet header and decrypts the PDCP PDU to obtain a data packet with the ROHC packet header;
s14: the satellite base station sends a data packet with an ROHC packet header to the ground gateway station through a satellite-ground feed link according to an uplink identification TEID distributed by the ground gateway station;
the satellite-ground feeder link refers to a link between a satellite base station and a ground gateway station;
the ground gateway station comprises an ROHC decompressor;
s15: after receiving ROHC data sent by a satellite base station, a ground gateway station carries out ROHC decompression processing to obtain data; after receiving ROHC data packet, decompressor finds out proper context in the context list according to PID of the data packet; decompressing a data packet header by combining context, submitting an upper layer protocol, and completing uplink data transmission;
the downlink transmission, namely the process that the ground gateway station sends downlink data to the satellite base station and then the satellite base station forwards the downlink data to the user terminal, comprises the following steps:
s20: a user terminal sends a session establishment request to a ground gateway station through a satellite base station, and the ground gateway station distributes uplink and downlink tunnel endpoint identifiers TEID to the satellite base station and the user terminal;
wherein the ground gateway station comprises an ROHC compressor;
s21: the ground gateway station performs ROHC header compression on data transmitted by an upper layer protocol: the compressor judges the protocol type of the data packet and determines PID according to a profile identification table specified by ROHC; searching a corresponding CID in the context list according to the PID of the data packet to obtain context; performing header compression on the data packet according to the current compressor state and context;
s22: the ground gateway station sends a data packet with an ROHC packet header to a satellite base station through a satellite-ground feed link according to the distributed downlink identification TEID;
s23: after receiving data with ROHC packet headers transmitted by a PHY, MAC and RLC layer of a satellite base station end, a Low-PDCP layer of the satellite base station encrypts and adds the PDCP packet headers to obtain PDCP PDUs; the PDCP PDU is delivered to a bottom layer protocol and is sent to a user terminal through a user link;
s24: the user terminal PDCP layer carries out PDCP header removal, decryption and ROHC decompression processing on the data packet passing through the user terminal PHY, MAC and RLC layers; after receiving ROHC data packet, decompressor finds out proper context in context list according to PID of data packet; and decompressing the data packet header by combining the context, submitting an upper layer protocol, and finishing downlink data transmission.
2. The method according to claim 1, wherein the data transmission method based on ROHC compression in satellite communication comprises: ROHC, namely Robust Header Compression, refers to Robust Header Compression; a tunnel endpoint Identifier, which is referred to as TEID for short; the PDCP layer of the user terminal includes an ROHC compressor.
3. The method according to claim 1, wherein the data transmission method based on ROHC compression in satellite communication comprises: the PDCP layer of the user terminal contains an ROHC decompressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911102043.XA CN110830170A (en) | 2019-11-12 | 2019-11-12 | Data transmission method based on ROHC compression in satellite communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911102043.XA CN110830170A (en) | 2019-11-12 | 2019-11-12 | Data transmission method based on ROHC compression in satellite communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110830170A true CN110830170A (en) | 2020-02-21 |
Family
ID=69554373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911102043.XA Pending CN110830170A (en) | 2019-11-12 | 2019-11-12 | Data transmission method based on ROHC compression in satellite communication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110830170A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114785400A (en) * | 2022-03-25 | 2022-07-22 | 南京熊猫汉达科技有限公司 | NTN satellite network architecture and construction method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100103864A1 (en) * | 2008-10-24 | 2010-04-29 | Qualcomm Incorporated | Cell relay protocol |
| CN102882879A (en) * | 2012-10-08 | 2013-01-16 | 中国电子科技集团公司第五十四研究所 | Internet protocol (IP) data compression transmission method applicable to satellite channel |
| US20160381598A1 (en) * | 2015-06-25 | 2016-12-29 | Qualcomm Incorporated | Adaptive rohc state transition |
| CN106817350A (en) * | 2015-11-30 | 2017-06-09 | 中兴通讯股份有限公司 | Message processing method and device |
-
2019
- 2019-11-12 CN CN201911102043.XA patent/CN110830170A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100103864A1 (en) * | 2008-10-24 | 2010-04-29 | Qualcomm Incorporated | Cell relay protocol |
| CN102882879A (en) * | 2012-10-08 | 2013-01-16 | 中国电子科技集团公司第五十四研究所 | Internet protocol (IP) data compression transmission method applicable to satellite channel |
| US20160381598A1 (en) * | 2015-06-25 | 2016-12-29 | Qualcomm Incorporated | Adaptive rohc state transition |
| CN106817350A (en) * | 2015-11-30 | 2017-06-09 | 中兴通讯股份有限公司 | Message processing method and device |
Non-Patent Citations (1)
| Title |
|---|
| 张亚生等: ""卫星IP网络包头压缩技术分析"", 《无线电工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114785400A (en) * | 2022-03-25 | 2022-07-22 | 南京熊猫汉达科技有限公司 | NTN satellite network architecture and construction method thereof |
| CN114785400B (en) * | 2022-03-25 | 2024-04-12 | 南京熊猫汉达科技有限公司 | Construction method of NTN satellite network architecture |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102026398B (en) | Method and device for realizing packet data convergence protocol of LTE relay system | |
| CN103327483B (en) | Method, aerogram base station and the radio communication terminal of user data is encrypted in transmission and reception | |
| EP3576445B1 (en) | Data transmission method and apparatus | |
| JP4440300B2 (en) | Separation-type medium access control protocol structure of wireless communication system, data transmission / reception method using the same, handover method and system thereof | |
| US7961875B2 (en) | Means and method for ciphering and transmitting data in integrated networks | |
| CN102098725B (en) | System and method for transmitting data between service gateway and relay terminals | |
| US9876722B2 (en) | Data multi-stream transmission method and device | |
| US8599878B2 (en) | Wireless communication apparatus, header compression method thereof, and header decompression method thereof | |
| EP3142391B1 (en) | Communication system, user terminal and communication control method | |
| CN111263416A (en) | Method and device for switching | |
| EP1303963B1 (en) | A method for header compression context control during handover in mobile data communication networks | |
| WO2012146076A1 (en) | Method, device and system for data transmission | |
| KR100807455B1 (en) | Method and apparatus for reducing transmission overhead in a communication system | |
| CN109391939B (en) | Key, parameter sending method and device, user plane entity and control plane entity | |
| CN110830170A (en) | Data transmission method based on ROHC compression in satellite communication | |
| US20100031015A1 (en) | IP Network Communication Method Having Security Function, And Communication System | |
| US20210144801A1 (en) | Wireless communication method, communication device, chip, and communication system | |
| WO2010133022A1 (en) | Method, apparatus and system for transmitting and receiving voice packets | |
| EP3185505B1 (en) | Data packet transmission processing method and device | |
| WO2010088804A1 (en) | Relay transmission method, relay node and base station | |
| CN107529156B (en) | Uplink transmission method, device and network architecture | |
| CN109348485B (en) | Multi-user uplink and downlink burst discontinuous low-rate service transmission method | |
| CN109688608B (en) | Voice data distribution method and system | |
| WO2024078358A1 (en) | Method and apparatus used in communication node for wireless communication | |
| KR20110090327A (en) | Device and method for compressing and decompressing in wireless communication system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200221 |
|
| WD01 | Invention patent application deemed withdrawn after publication |