CN114629541B - Method for transmitting RMSI message in broadband satellite communication system - Google Patents
Method for transmitting RMSI message in broadband satellite communication system Download PDFInfo
- Publication number
- CN114629541B CN114629541B CN202011460389.XA CN202011460389A CN114629541B CN 114629541 B CN114629541 B CN 114629541B CN 202011460389 A CN202011460389 A CN 202011460389A CN 114629541 B CN114629541 B CN 114629541B
- Authority
- CN
- China
- Prior art keywords
- ssb
- rmsi
- message
- pbch
- wave
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000004891 communication Methods 0.000 title claims abstract description 25
- 230000011664 signaling Effects 0.000 claims abstract description 9
- 230000001360 synchronised effect Effects 0.000 claims abstract description 5
- 230000005540 biological transmission Effects 0.000 claims description 11
- 238000001514 detection method Methods 0.000 claims description 8
- 101000826083 Streptococcus agalactiae serotype V (strain ATCC BAA-611 / 2603 V/R) Single-stranded DNA-binding protein 4 Proteins 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 238000010295 mobile communication Methods 0.000 claims 2
- 238000005516 engineering process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000013468 resource allocation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18513—Transmission in a satellite or space-based system
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1851—Systems using a satellite or space-based relay
- H04B7/18519—Operations control, administration or maintenance
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
Abstract
The embodiment of the application provides a method for sending an RMSI message based on an SSB wave beam in a broadband satellite communication system, which comprises the following steps: the method comprises the steps that RMSI resources are fixedly configured in a broadcast channel PBCH of a synchronous signal block SSB signaling beam; the PBCH channel of the SSB signaling beam simultaneously carries MIB information and RMSI information, and is combined and transmitted in a frequency division multiplexing mode; and the terminal completes the reception of the master information block MIB message and the RMSI message on the PBCH. The method and the device solve the problem of rapid sending and receiving of the RMSI message in the mode of scanning the wave position by satellite communication, thereby reducing time delay in the random access process, improving the success rate of receiving the RMSI message, multiplexing the frequency domain resource of the SSB wave beam in a frequency division multiplexing mode, and improving the utilization rate of the frequency domain resource of the SSB wave beam.
Description
Technical Field
The invention relates to the field of satellite communication, in particular to a method for transmitting an RMSI message based on an SSB wave beam in a broadband satellite communication system.
Background
Terrestrial wireless broadband communication technologies such as 5G have been quite mature and have been developed commercially, but in the satellite communication field, the application of broadband wireless communication technologies is greatly behind that of terrestrial wireless broadband communication technologies. The method is a new technical challenge when the method has huge application requirements and markets, and is used for realizing space-to-earth integrated seamless service of high-speed broadband service by applying the mature ground wireless broadband communication technology to the satellite field.
The control beam and the service beam in the current 3GPP terrestrial wireless communication 5G system share one physical beam, and the RMSI message is positioned in the SSB control beam. Referring to fig. 1 for the main process of transmitting and receiving, a network side device periodically transmits MIB messages in SSB beams, and a terminal decodes the MIB messages and obtains PDCCH time-frequency domain information related to scheduling RMSI carried in the MIB messages. And the terminal monitors the PDCCH channels corresponding to the time domain and the frequency domain according to the obtained information service beam. In a transmission period (20 ms) corresponding to the RMSI, the terminal detects PDCCH for scheduling the RMSI message, analyzes DCI payload to obtain time-frequency domain information of a PDSCH channel where the RMSI is located, subsequently receives the time-frequency domain information corresponding to the PDSCH channel, and obtains the content of the RMSI message through decoding and identification of SI-RNTI (TS 38.321 Table 7.1-2).
One way of broadband satellite wireless communication is to divide the covered area into a number of wave sites (the number of wave sites is typically about 500 or more), and the SSB signaling beam and the data traffic beam are physically separated. The SSB wave beam adopts a point wave bit scanning mode to provide random access service for users in a coverage area, the residence period time of each wave bit is 1ms, and the time required for scanning all wave bits in the coverage area of one round is about 500ms. The RMSI message sending mechanism used in the terrestrial communication firstly sends MIB messages by the network side device, and then the terminal can further receive and decode the RMSI messages according to the related information in the MIB messages and combining with the RMSI message sending period, and the message delay in the middle needs at least 20ms. Under the premise that the broadband satellite communication adopts a mode of scanning SSB wave beams according to wave bits, the residence period is 1ms, and the SSB wave beams and the data service wave beams are physically separated, if a transmission mechanism of ground communication RMSI information is completely adopted, firstly, the SSB wave beams can only be provided for broadcasting and transmitting MIB information, and subsequent RMSI information transmission cannot be carried out; and even if the technical scheme is changed, the ground wireless communication RMSI sending mechanism is moved to the SSB wave beam, the terminal also needs to wait until a proper scanning wave bit window and an RMSI sending period window are overlapped to receive the RMSI message, most of the RMSI messages can be received only by scanning the terminal by the SSB wave beam for a plurality of times, and the success rate of receiving the RMSI message is greatly reduced due to overtime caused by too long time period.
Disclosure of Invention
In view of the foregoing, an embodiment of the present application proposes a method for transmitting an RMSI message based on an SSB beam in a broadband satellite communication system, including: the method comprises the steps that RMSI resources are fixedly configured in a broadcast channel PBCH of a synchronous signal block SSB signaling beam; the PBCH channel of the SSB signaling beam simultaneously carries MIB information and RMSI information, and is combined and transmitted in a frequency division multiplexing mode; and the terminal completes the reception of the master information block MIB message and the RMSI message on the PBCH.
Further, the method further comprises the following steps: the PDCCH-ConfigSIB1 field and SSB-SubCarrier Offset field in the existing MIB message are changed to reserved fields.
Further, the RMSI resource is configured with a 120k subcarrier interval suitable for millimeter wave wireless transmission configuration, 48 resource blocks RB are additionally allocated in the frequency domain, and 2 continuous symbols are occupied in the time domain.
Still further, the fixedly configuring RMSI resources includes: the method comprises the steps of configuring 48 continuous RBs after 20 RBs occupied by the existing 5G NR PBCH signal on a frequency domain; symbol 1 and symbol 2 of the existing 5g SSB 4 symbols are configured in the time domain.
Further, the terminal completes receiving the master information block MIB message and RMSI message on the PBCH, which specifically includes: receiving SSB wave beam scanning signals on the wave position, and selecting SSB signals with the best signals; attempting to detect the master-slave synchronization signals PSS and SSS, if the detection is successful, proceeding to the next step, otherwise, reselecting the best SSB signal; attempting to detect the PBCH, if the detection is successful, proceeding to the next step, otherwise, reselecting the best SSB signal; and attempting to decode the MIB message and the RMSI message carried in the PBCH channel, and acquiring all broadcast messages corresponding to the MIB and the RMSI required by random access at one time.
Further, the method further comprises: if service beam switching occurs in the SSB beam scanning process on the overlapped wave positions covered by the wave beam overlapping, continuously receiving the SSB beam RMSI message to complete session access on the current service beam, and actively initiating a service beam switching process according to the position information reported by the terminal in the latest SSB scanning period after the service beam to be switched is completely moved.
In the method for sending the RMSI message based on the SSB beam, the RMSI message content is combined and sent on the SSB beam PBCH channel in a frequency division multiplexing mode, and the time-frequency domain resource required by the RMSI is increased by adopting millimeter wave configuration suitable for satellite transmission characteristics; the method solves the problems of rapid sending and receiving of the RMSI message in the mode of wave bit scanning in satellite communication, reduces the time delay of the random access process, improves the receiving success rate of the RMSI message, multiplexes the frequency domain resources of the SSB wave beam in a frequency division multiplexing mode, and improves the utilization rate of the frequency domain resources of the SSB wave beam.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an RMSI message transmission process in a terrestrial 5G architecture;
fig. 2 is a schematic diagram of RMSI message resource allocation based on SSB beams according to embodiment 1 of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention; it should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
One embodiment of the present application proposes a method for transmitting RMSI messages based on SSB beams, including: the method comprises the steps that RMSI resources are fixedly configured in a broadcast channel PBCH of a synchronous signal block SSB signaling beam; the PBCH channel of the SSB signaling beam simultaneously carries MIB information and RMSI information, and is combined and transmitted in a frequency division multiplexing mode; and the terminal completes the reception of the master information block MIB message and the RMSI message on the PBCH.
In an alternative embodiment, the method further comprises: the PDCCH-ConfigSIB1 field and SSB-SubCarrier Offset field in the existing MIB message are changed to reserved fields.
In an alternative embodiment, the RMSI resource is configured with a 120k subcarrier spacing suitable for millimeter wave wireless transmission configuration, 48 resource blocks RB are allocated in the frequency domain, and 2 continuous symbols are occupied in the time domain.
In an alternative embodiment, fixedly configuring RMSI resources includes: the method comprises the steps of configuring 48 continuous RBs after 20 RBs occupied by the existing 5G NR PBCH signal on a frequency domain; symbol 1 and symbol 2 of the existing 5g SSB 4 symbols are configured in the time domain.
In an alternative embodiment, the terminal completes the reception of the master information block MIB message and RMSI message on the PBCH, specifically including: receiving SSB wave beam scanning signals on the wave position, and selecting SSB signals with the best signals; attempting to detect the master-slave synchronization signals PSS and SSS, if the detection is successful, proceeding to the next step, otherwise, reselecting the best SSB signal; attempting to detect the PBCH, if the detection is successful, proceeding to the next step, otherwise, reselecting the best SSB signal; and attempting to decode the MIB message and the RMSI message carried in the PBCH channel, and acquiring all broadcast messages corresponding to the MIB and the RMSI required by random access at one time.
In an alternative embodiment, the method further comprises: if service beam switching occurs in the SSB beam scanning process on the overlapped wave positions covered by the wave beam overlapping, continuously receiving the SSB beam RMSI message to complete session access on the current service beam, and actively initiating a service beam switching process according to the position information reported by the terminal in the latest SSB scanning period after the service beam to be switched is completely moved.
Embodiment 1 SSB Beam-based RMSI message resource configuration method
Please refer to fig. 2, taking configuration of RMSI message resources in SSB beam as an example: after 20 RB resource blocks occupied by the existing 5G NR PBCH channel are in the frequency domain, adopting a millimeter wave 120K SCS configuration format suitable for satellite transmission, and distributing 48 continuous RBs for sending RMSI information; the RMSI information is transmitted using the existing symbols 1 and 2 out of SSB 4 symbols (0 to 3) in the time domain.
In this embodiment, millimeter wave configuration suitable for satellite transmission features is adopted to increase time-frequency domain resources required by RMSI, and frequency domain resources of SSB beams are multiplexed in a frequency division multiplexing manner, so that the frequency domain resource utilization rate of the SSB beams is improved.
Example 2 method for transmitting RMSI message based on SSB beam in broadband satellite communication system
Taking terminal a as an example, receiving RMSI message in SSB beam, mainly includes:
step 1: SSB wave beam scanning coverage area of the broadband satellite communication system;
step 2: after receiving the SSB signal, the terminal A of the wave position selects the SSB signal with the best signal;
step 3: the UE tries to detect the PSS and SSS signals, if the detection is successful, the next step is carried out, otherwise, the step 2 is returned;
step 4: the UE tries to detect the PBCH, if the detection is successful, the next step is carried out, otherwise, the step 2 is returned;
step 5: the UE tries to decode the MIB message and the RMSI message carried in the PBCH channel, and obtains all broadcast information corresponding to the MIB and the RMSI needed for PRACH access at one time.
In the embodiment, the RMSI message content is combined and sent on the SSB beam PBCH channel in a frequency division multiplexing manner, so that the rapid sending and receiving of the RMSI message in a wave-position scanning manner in satellite communication are solved, the time delay in a random access process is reduced, and the receiving success rate of the RMSI message is improved.
Example 3 RMSI messaging by high speed mobile terminals based on SSB beams in service beam overlapping coverage areas
The coverage of the service beams necessarily has an overlap area with each other in order to form a continuous coverage. When some terminals moving at high speed, such as airplanes, are in such overlapping wave positions and switching from service beam a to service beam B may occur during SSB beam scanning, the terminals continue to receive SSBRMSI messages to complete session access on service beam a. After the mobile terminal moves to the service beam B, the satellite communication controller actively initiates a service beam switching process according to the position information reported by the terminal in the last SSB scanning period.
As can be seen from the above embodiments, in the method for sending RMSI message based on SSB beam provided in the embodiments of the present application, RMSI message content is combined and sent on SSB beam PBCH channel in a frequency division multiplexing manner, and time-frequency domain resources required by RMSI are increased by adopting millimeter wave configuration suitable for satellite transmission characteristics; the method solves the problems of rapid sending and receiving of the RMSI message in the mode of wave bit scanning in satellite communication, reduces the time delay of the random access process, improves the receiving success rate of the RMSI message, multiplexes the frequency domain resources of the SSB wave beam in a frequency division multiplexing mode, and improves the utilization rate of the frequency domain resources of the SSB wave beam.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the above method embodiments may be implemented by hardware associated with program instructions, where the foregoing program may be stored in a computer readable storage medium, and when executed, the program performs steps including the above method embodiments; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. A method for transmitting RMSI messages based on SSB beams in a broadband satellite communication system, comprising:
the method comprises the steps that Residual Minimum System Information (RMSI) resources are fixedly configured in a broadcast channel (PBCH) of a Synchronous Signal Block (SSB) signaling beam, wherein the RMSI resources are configured by adopting 120kHz subcarrier spacing suitable for millimeter wave wireless transmission configuration, 48 Resource Blocks (RBs) are additionally distributed on a frequency domain, and 2 continuous symbols are occupied on a time domain;
the PBCH channel of the SSB signaling beam simultaneously carries a master information block MIB message and an RMSI message, and is combined and transmitted in a frequency division multiplexing mode;
the terminal completes MIB message and RMSI message reception on the PBCH, and specifically comprises the following steps:
receiving SSB wave beam scanning signals on the wave position, and selecting SSB signals with the best signals;
attempting to detect the master-slave synchronization signals PSS and SSS, if the detection is successful, proceeding to the next step, otherwise, reselecting the best SSB signal;
attempting to detect the PBCH, if the detection is successful, proceeding to the next step, otherwise, reselecting the best SSB signal;
and attempting to decode the MIB message and the RMSI message carried in the PBCH channel, and acquiring all broadcast messages corresponding to the MIB and the RMSI required by random access at one time.
2. The method as recited in claim 1, further comprising:
the physical downlink control channel system information block 1PDCCH-ConfigSIB1 field and the subcarrier offset SSB-sub-carrier offset field of the synchronous signal block in the existing MIB message are changed into reserved fields.
3. The method of claim 1, wherein the fixedly configuring RMSI resources comprises:
the method comprises the steps of configuring 48 continuous RBs after 20 RBs occupied by a 5G NR PBCH signal of a new air interface broadcast channel of the existing fifth generation mobile communication on a frequency domain;
the 2 nd symbol and the 3 rd symbol of the existing fifth generation mobile communication synchronization signal block 5g SSB 4 symbols are configured in the time domain.
4. The method according to claim 1, wherein the method further comprises:
if service beam switching occurs in the SSB beam scanning process on the overlapped wave positions covered by the wave beam overlapping, continuously receiving the SSB beam RMSI message to complete session access on the current service beam, and actively initiating a service beam switching process according to the position information reported by the terminal in the latest SSB scanning period after the service beam to be switched is completely moved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011460389.XA CN114629541B (en) | 2020-12-11 | 2020-12-11 | Method for transmitting RMSI message in broadband satellite communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011460389.XA CN114629541B (en) | 2020-12-11 | 2020-12-11 | Method for transmitting RMSI message in broadband satellite communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114629541A CN114629541A (en) | 2022-06-14 |
| CN114629541B true CN114629541B (en) | 2024-03-29 |
Family
ID=81896317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011460389.XA Active CN114629541B (en) | 2020-12-11 | 2020-12-11 | Method for transmitting RMSI message in broadband satellite communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114629541B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586863A (en) * | 2017-09-28 | 2019-04-05 | 上海诺基亚贝尔股份有限公司 | The method, apparatus and computer storage medium sent and received in communication network for signal |
| CN110971322A (en) * | 2018-09-30 | 2020-04-07 | 维沃移动通信有限公司 | Information transmission method, network equipment and terminal |
| CN111226486A (en) * | 2017-11-18 | 2020-06-02 | 联想（新加坡）私人有限公司 | Random access configuration |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4255051A3 (en) * | 2017-08-31 | 2023-11-08 | Telefonaktiebolaget LM Ericsson (publ) | Configuration of additional synchronization signal |
-
2020
- 2020-12-11 CN CN202011460389.XA patent/CN114629541B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586863A (en) * | 2017-09-28 | 2019-04-05 | 上海诺基亚贝尔股份有限公司 | The method, apparatus and computer storage medium sent and received in communication network for signal |
| CN111226486A (en) * | 2017-11-18 | 2020-06-02 | 联想（新加坡）私人有限公司 | Random access configuration |
| CN110971322A (en) * | 2018-09-30 | 2020-04-07 | 维沃移动通信有限公司 | Information transmission method, network equipment and terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114629541A (en) | 2022-06-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11129136B2 (en) | Transmission and reception of broadcast information in a wireless communication system | |
| US11877316B2 (en) | Apparatuses and methods for establishing an initial access | |
| US11665691B2 (en) | Communications devices and methods | |
| US11284350B2 (en) | Method and device in UE and base station for power saving | |
| US8837384B2 (en) | Physical channel communication method for random access in wireless communication system | |
| EP4274346A2 (en) | Communication system | |
| CN111615854B (en) | Method, apparatus and computer readable medium for channel utilization in unlicensed spectrum | |
| JP5395949B2 (en) | Switching between base stations | |
| US9854484B2 (en) | Mobile station, base station, and method for managing synchronization state | |
| US9461785B2 (en) | Control signaling method and apparatus in a coordinated multi-point system | |
| US20120008550A1 (en) | Relay-Node, Donor-eNB and method for receiving and sending system information | |
| CN111656844A (en) | Initial access design in unlicensed spectrum | |
| KR20100050219A (en) | Apparatus and method for transmitting/receiving system information in a wireless communication system with hierarchical cell structure | |
| EP3494660B1 (en) | Efficient communication mode switching in mobile communications networks | |
| US9674695B2 (en) | Method, terminal, and base station for transmitting information | |
| US10674464B2 (en) | Method and device for synchronizing frame numbers between Device-to-Device communication supported user devices | |
| US11683665B2 (en) | Method and apparatus for handling of a data inactivity timer for MBS session in a wireless communication system | |
| CN112564868A (en) | Signal sending and receiving method and terminal | |
| CN114629541B (en) | Method for transmitting RMSI message in broadband satellite communication system | |
| CN108282893B (en) | Transmission method, receiving method, base station and user equipment of common control message | |
| Goyal et al. | Reducing the paging overhead in highly directional systems | |
| CN112788660B (en) | System information sending and receiving processing method and device and electronic equipment | |
| CN111447565B (en) | Method, device, system and storage medium for sending SIB (multimedia broadcast single-channel) special for MBMS (multimedia broadcast multicast service) | |
| CN107295647B (en) | Method and device for configuring physical layer mode configuration information | |
| KR101600450B1 (en) | Communication system and method for updating system information |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |