CN111372261A - Wireless communication method and system based on repeater, terminal, base station and repeater - Google Patents
Wireless communication method and system based on repeater, terminal, base station and repeater Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The embodiment of the invention discloses a repeater-based wireless communication method and system, a terminal, a base station and a repeater, wherein a return frequency band of a return link for transmitting information between the base station and the repeater is different from an access frequency band of an access link for transmitting information between the repeater and the terminal, and paired frequency point offset values in the return frequency band and the access frequency band are the same. The frequency isolation is performed on the access frequency band and the return frequency band, and due to the frequency isolation, when a terminal performs cell search, the frequency band of a base station cell needs to be searched first, and then the frequency band of a repeater cell needs to be searched, and the base station also needs to send a broadcast signal and a synchronization signal of the repeater. Because the access frequency band is different from the return frequency band, the repeater station can not generate interference to the base station, and communication can be ensured under the condition of not being influenced by the repeater station only by relatively simply changing the configuration information of the base station and the terminal.
Description
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to a wireless communication method and system based on a repeater, a terminal, a base station and the repeater.
Background
With the development of the smart power grid, the electricity consumption information acquisition system puts new and higher requirements on communication channels. At present, the 230MHz frequency band is mainly applied to a data transmission radio station to undertake remote data acquisition work, and the provided rate is very low, so that the data transmission radio station can only be used for some simple communication applications, and the increasing service requirements of a smart power grid and a sensor network cannot be met. The TD-LTE230 power utilization information acquisition system is a wireless communication system which is based on a TD-LTE technology, combines advanced technologies such as spectrum sensing, carrier aggregation, interference demodulation and software radio, uses discrete spectrum resources in a 230MHz frequency band in the power industry, and is innovated, researched and developed and deeply customized. The method is deeply customized according to the communication requirements of the power service, optimizes a public network TD-LTE technical system, a communication protocol and a networking structure, and improves the capacity of the terminal and the real-time performance of the service. The 223.025-235.000 MHz frequency band is used for telemetering, remote control, data transmission and other services, and consists of a plurality of scattered 25k channels, and adjacent frequencies are assigned to other industries for use, so that no wider continuous spectrum resource exists. The number of the electric power authorization frequency points is 40, and the electric power authorization frequency points are distributed in a discrete and unequal interval mode.
The LTE230 frequency point resources are relatively tight, and in order to better meet the power coverage requirement, a repeater is usually used to solve the problem of deep coverage in a dense cell environment and to achieve extended coverage in a low-capacity wide-coverage scenario. The repeater is an optimized scheme for solving the problem of the extending and covering capability of a communication network, has the advantages of simple structure, less investment, convenient installation and the like compared with a base station, and can be widely used for blind areas which are difficult to cover and improving the communication quality. However, under the existing communication mechanism, the repeater station may generate large interference to the base station, which affects information transmission between the base station and the terminal.
In the process of implementing the embodiment of the invention, the inventor finds that a repeater station can generate larger interference to a base station under the existing communication mechanism, and influences information transmission between the base station and a terminal.
Disclosure of Invention
The technical problem to be solved by the invention is how to solve the problem that the repeater station can generate larger interference to the base station under the existing communication mechanism and influence the information transmission between the base station and the terminal.
In view of the above technical problems, an embodiment of the present invention provides a repeater-based wireless communication method, including:
when cell searching is carried out, a first frequency band where a pre-configured base station cell is located is obtained, and a cell with signal strength meeting requirements is searched on the first frequency band;
if the cell with the signal strength meeting the requirement cannot be searched on the first frequency band, acquiring a second frequency band where a pre-configured repeater cell is located, and searching the cell with the signal strength meeting the requirement on the second frequency band;
taking the cell which is searched on the second frequency band and has the signal strength meeting the requirement as a target cell, and residing in the target cell;
the return frequency band of a return link for transmitting information between the base station and the repeater is different from the access frequency band of an access link for transmitting information between the repeater and the terminal, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
The embodiment provides a repeater-based wireless communication method, which comprises the following steps:
periodically transmitting a first broadcast signal and a first synchronization signal corresponding to a terminal, and transmitting a second broadcast signal and a second synchronization signal corresponding to a repeater;
the return frequency band of a return link for transmitting information between the base station and the repeater is different from the access frequency band of an access link for transmitting information between the repeater and the terminal, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
The embodiment provides a repeater-based wireless communication method, which comprises the following steps:
the information between the base station and the repeater is transmitted through a return frequency band of a return link for transmitting the information between the base station and the repeater, and the information between the repeater and the terminal is transmitted through an access frequency band of an access link for transmitting the information between the repeater and the terminal;
the return frequency band is different from the access frequency band, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
The embodiment provides a terminal, including:
the first searching module is used for acquiring a first frequency band where a pre-configured base station cell is located when cell searching is carried out, and searching a cell with signal strength meeting requirements on the first frequency band;
a second searching module, configured to, if a cell whose signal strength meets the requirement cannot be searched in the first frequency band, obtain a second frequency band in which a pre-configured repeater cell is located, and search for a cell whose signal strength meets the requirement in the second frequency band;
a residing module, configured to reside in a target cell, where a cell that is searched on the second frequency band and has a signal strength meeting a requirement is used as the target cell;
the return frequency band of a return link for transmitting information between the base station and the repeater is different from the access frequency band of an access link for transmitting information between the repeater and the terminal, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
The present embodiment provides a base station, including:
a transmitting module for periodically transmitting a first broadcast signal and a first synchronization signal corresponding to a terminal, and transmitting a second broadcast signal and a second synchronization signal corresponding to a repeater;
the return frequency band of a return link for transmitting information between the base station and the repeater is different from the access frequency band of an access link for transmitting information between the repeater and the terminal, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
The embodiment provides a repeater, which includes:
the transmission module is used for transmitting information between the base station and the repeater through a return frequency band of a return link for transmitting information between the base station and the repeater and transmitting information between the repeater and the terminal through an access frequency band of an access link for transmitting information between the repeater and the terminal;
the return frequency band is different from the access frequency band, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
The embodiment provides a repeater-based wireless communication system, which comprises a base station, a repeater and a terminal;
the return frequency band of a return link for transmitting information between a base station and a repeater is different from the access frequency band of an access link for transmitting information between the repeater and a terminal, and paired frequency point offset values in the return frequency band and the access frequency band are the same;
the terminal is used for executing any method corresponding to the terminal, the base station is used for any method corresponding to the base station, and the repeater is used for any method corresponding to the repeater.
The embodiment of the invention provides a repeater-based wireless communication method and system, a terminal, a base station and a repeater, wherein a return frequency band of a return link for transmitting information between the base station and the repeater is different from an access frequency band of an access link for transmitting information between the repeater and the terminal, and paired frequency point offset values in the return frequency band and the access frequency band are the same. The frequency isolation is performed on the access frequency band and the return frequency band, and due to the frequency isolation, when a terminal performs cell search, the frequency band of a base station cell needs to be searched first, and then the frequency band of a repeater cell needs to be searched, and the base station also needs to send a broadcast signal and a synchronization signal of the repeater. Because the access frequency band is different from the return frequency band, the repeater station can not generate interference to the base station, and communication can be ensured under the condition of not being influenced by the repeater station only by relatively simply changing the configuration information of the base station and the terminal.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a repeater-based communication system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a wireless communication system provided by another embodiment of the present invention;
fig. 3 is a schematic diagram of frequency settings of a backhaul frequency band and an access frequency band according to another embodiment of the present invention;
FIG. 4 is a flow chart illustrating a repeater-based wireless communication method for a terminal according to another embodiment of the present invention;
FIG. 5 is a flow chart of a repeater-based wireless communication method for a base station according to another embodiment of the present invention;
FIG. 6 is a diagram of a frame structure in the prior art 230 according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of a terminal according to another embodiment of the present invention;
fig. 8 is a schematic structural diagram of a base station according to another embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a repeater according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the existing solution, in order to improve the signal coverage, a repeater is disposed between a base station and a terminal, fig. 1 is a schematic structural diagram of a communication system based on the repeater provided in this embodiment, referring to fig. 1, if a terminal UE accesses a repeater cell, in a communication process of the terminal base station, a base station Node B serves as a donor antenna and sends a signal to the repeater through a process T1, an antenna of the repeater serves as a retransmission antenna, the retransmission antenna serves as an antenna for transmitting a signal to the terminal UE through a process T2, and a received signal sent by the donor antenna is sent to the terminal UE through a process T3. However, the frequency band of the backhaul link for transmitting information between the base station and the repeater is the same as the frequency band of the access link for transmitting information between the repeater and the terminal, so that the repeater has a large influence on the communication quality between the base station and the terminal.
In order to solve the problem that the repeater affects the communication quality of the base station and the terminal due to the fact that the frequency bands of the backhaul link and the access link are the same, the embodiment provides a wireless communication system based on the repeater, fig. 2 shows a schematic diagram of the wireless communication system provided by the embodiment, referring to fig. 2, a link between the base station and the repeater is defined as a backhaul link, and a link between the repeater and the terminal is defined as an access link. Fig. 3 is a schematic diagram of frequency settings of a backhaul frequency band and an access frequency band provided in this embodiment, referring to fig. 3, in the communication system, paired frequency point offset values in the backhaul frequency band and the access frequency band are the same, for example, the access frequency band is a frequency band after the backhaul frequency band moves by nMHz, and bandwidths of the backhaul frequency band and the access frequency band are both smmhz.
Based on the communication systems provided in fig. 2 and fig. 3, as a terminal in the communication system, this embodiment provides a repeater-based wireless communication method suitable for the terminal, and fig. 4 is a flowchart of the repeater-based wireless communication method suitable for the terminal provided in this embodiment, referring to fig. 4, the method includes:
401: when cell searching is carried out, a first frequency band where a pre-configured base station cell is located is obtained, and a cell with signal strength meeting requirements is searched on the first frequency band;
402: if the cell with the signal strength meeting the requirement cannot be searched on the first frequency band, acquiring a second frequency band where a pre-configured repeater cell is located, and searching the cell with the signal strength meeting the requirement on the second frequency band;
403: taking the cell which is searched on the second frequency band and has the signal strength meeting the requirement as a target cell, and residing in the target cell;
the return frequency band of a return link for transmitting information between the base station and the repeater is different from the access frequency band of an access link for transmitting information between the repeater and the terminal, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
After the terminal is usually turned on, cell search is performed, and a cell connected to an area where the terminal is located ensures that the terminal can perform communication. Because the backhaul frequency band is different from the access frequency band, when the terminal performs cell search, the terminal first performs search in the first frequency band where the base station cell is located, and after a cell capable of performing communication is searched, performs camping in the cell. If the cell which can be resided cannot be searched in the base station cell (for example, the terminal is currently in an area uncovered by the base station signal), then the repeater cell is searched, and the cell which meets the requirement through the searched signal strength is resided. The cell searching mode of the terminal ensures that the terminal can be normally connected with a network for communication under the condition that the return frequency band is different from the access frequency band. That is, in order to enable the terminal to search for the repeater cell, it is necessary to modify the configuration file of the terminal, configure the base station cell and the repeater cell respectively, and further search for the repeater cell after the search for the base station fails.
Certainly, when the cell is searched, the terminal searches the cell according to the synchronization and broadcast subband list configured in the configuration file. And once the sub-band meeting the condition is searched, storing the sub-band into the historical sub-band information, and selecting the sub-band according to the historical sub-band information when the terminal performs cell search subsequently.
In this embodiment, a backhaul frequency band of a backhaul link for transmitting information between a base station and a repeater is different from an access frequency band of an access link for transmitting information between the repeater and a terminal, and paired frequency point offset values in the backhaul frequency band and the access frequency band are the same. The frequency isolation is performed on the access frequency band and the return frequency band, and due to the frequency isolation, when a terminal performs cell search, the frequency band of a base station cell needs to be searched first, and then the frequency band of a repeater cell needs to be searched, and the base station also needs to send a broadcast signal and a synchronization signal of the repeater. Because the access frequency band is different from the return frequency band, the repeater station can not generate interference to the base station, and communication can be ensured under the condition of not being influenced by the repeater station only by relatively simply changing the configuration information of the base station and the terminal.
Further, on the basis of the foregoing embodiment, when performing cell search, acquiring a first frequency band in which a preconfigured base station cell is located, and searching for a cell with a signal strength meeting a requirement on the first frequency band includes:
when cell searching is carried out, acquiring a first frequency band where a pre-configured base station cell is located, and judging whether a cell with a signal-to-noise ratio (SINR) larger than a first threshold value and a Reference Signal Received Power (RSRP) larger than a second threshold value can be searched on the first frequency band;
if a cell with SINR larger than the first threshold and RSRP larger than the second threshold can be searched on the first frequency band, judging that a cell with signal strength meeting requirements can be searched on the first frequency band, taking the searched cell as the target cell, and residing in the target cell;
if the cell with the SINR larger than the first threshold and the RSRP larger than the second threshold cannot be searched on the first frequency band, judging that the cell with the signal strength meeting the requirement cannot be searched on the first frequency band.
Further, on the basis of the foregoing embodiments, the acquiring a second frequency band where a pre-configured repeater cell is located, and searching for a cell whose signal strength meets a requirement on the second frequency band includes:
acquiring a second frequency band where a pre-configured repeater cell is located, and judging whether a cell with an SINR (signal to interference plus noise ratio) larger than the first threshold and an RSRP (reference signal to noise ratio) larger than the second threshold can be searched in the second frequency band;
if a cell with SINR larger than the first threshold value and RSRP larger than the second threshold value can be searched in the second frequency band, the searched cell is the target cell;
and if the cells with SINR larger than the first threshold value and RSRP larger than the second threshold value cannot be searched in the second frequency band, sending out prompt information that the cells with signal strength meeting the requirement cannot be searched in the second frequency band.
Specifically, whether a cell capable of camping is searched in a base station cell or a repeater cell, the searched cell with the signal strength meeting the requirement refers to a cell with the signal to noise ratio SINR greater than a first threshold value and the reference signal received power RSRP greater than a second threshold value. Searching a base station cell preferentially, searching a repeater cell when the base station cell cannot search a cell with signal strength meeting the requirement, if the repeater cell searches the cell with the signal strength meeting the requirement, residing in the cell, otherwise, sending prompt information to inform a user of the reason that the user cannot connect the network. The prompt message may be displayed in the form of a pop-up window on the screen of the terminal, which is not limited in this embodiment.
The embodiment provides a repeater-based wireless communication method, which enables a terminal to search a cell meeting the signal strength requirement through a base station cell and a repeater cell by modifying a terminal configuration file, and ensures the smooth proceeding of a communication process.
Based on the communication systems provided in fig. 2 and fig. 3, as a base station in the communication system, this embodiment provides a repeater-based wireless communication method suitable for a terminal, and fig. 5 is a flowchart of the repeater-based wireless communication method suitable for the base station provided in this embodiment, and referring to fig. 5, the method includes:
501: periodically transmitting a first broadcast signal and a first synchronization signal corresponding to a terminal, and transmitting a second broadcast signal and a second synchronization signal corresponding to a repeater;
the return frequency band of a return link for transmitting information between the base station and the repeater is different from the access frequency band of an access link for transmitting information between the repeater and the terminal, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
In order to ensure that the terminal can establish a communication connection with the base station, the base station periodically transmits a broadcast signal and a synchronization signal, wherein the synchronization signal and the broadcast signal are information required to be used before the terminal establishes the communication connection with the base station. However, in the communication system provided in fig. 2 and 3, the access frequency and the backhaul frequency are different, so in order to ensure that the base station and the repeater establish a communication connection, the base station also needs to transmit a broadcast signal and a synchronization signal corresponding to the base station. That is, the base station needs to transmit the broadcast and synchronization signal of the repeater cell in addition to the broadcast and synchronization signal of the own cell.
In order to send broadcast signals and conduct cell search and synchronization, each cell is configured with a frequency point as a synchronization sub-band, and is configured with 1-3 frequency points as broadcast sub-bands. Fig. 6 is a schematic diagram of a frame structure in the prior art 230 provided in this embodiment, referring to fig. 6, in the frame structure, one radio frame is composed of 5 subframes with a length of 5ms, where subframe 0 is a downlink subframe, and subframes 2, 3, and 4 are uplink subframes; subframe 1 is a special subframe, which includes 3 fields, DwPTS, GP, and UpPTS, respectively.
DwPTS refers to a Downlink Pilot Time Slot (Downlink Pilot Time Slot), UpPTS refers to an Uplink Pilot Time Slot (Uplink Pilot Time Slot), and GP refers to a Guard Period (Guard Period).
In this embodiment, a backhaul frequency band of a backhaul link for transmitting information between a base station and a repeater is different from an access frequency band of an access link for transmitting information between the repeater and a terminal, and paired frequency point offset values in the backhaul frequency band and the access frequency band are the same. The frequency isolation is performed on the access frequency band and the return frequency band, and due to the frequency isolation, when a terminal performs cell search, the frequency band of a base station cell needs to be searched first, and then the frequency band of a repeater cell needs to be searched, and the base station also needs to send a broadcast signal and a synchronization signal of the repeater. Because the access frequency band is different from the return frequency band, the repeater station can not generate interference to the base station, and communication can be ensured under the condition of not being influenced by the repeater station only by relatively simply changing the configuration information of the base station and the terminal.
Further, on the basis of the above embodiment, the method further includes:
if an instruction for scheduling a target terminal to a target service sub-band to process a service is received, judging whether a frequency band corresponding to a target cell where the target terminal resides is a first frequency band where a base station cell is located or a second frequency band where a repeater cell is located;
if the frequency band corresponding to the target cell where the target terminal resides is the first frequency band where the base station cell is located, the target service sub-band is an actual access sub-band corresponding to the target service sub-band, DCI is generated according to the actual access sub-band, and the DCI is sent to the target terminal;
if the frequency band corresponding to the target cell where the target terminal resides is the second frequency band where the repeater cell is located, acquiring a sub-band obtained after the deviation bandwidth of the target service sub-band to the access frequency band is equal to the deviation value, taking the sub-band as the actual access sub-band, generating DCI according to the actual access sub-band, and sending the DCI to the target terminal through the repeater.
Because the return frequency band is different from the access frequency band, when the base station needs to indicate that a certain terminal is switched to a target service sub-band from a target cell where the terminal is currently located, if the terminal currently resides in a repeater cell, the actual access sub-band which is actually required to be accessed by the terminal to the target service sub-band in the repeater cell needs to be determined according to the offset relationship between the access frequency band and the return frequency band.
Specifically, the uplink and downlink transmission is indicated by the base station sending DCI to the UE. According to the difference of the UE capability, the UE can be divided into a single sub-band terminal and a multi-sub-band terminal. The single sub-band terminal and the multi-sub-band terminal both perform an attachment process in a single sub-band form, and after the attachment, the base station allocates one camping sub-band to each UE. The resident subband refers to a subband for monitoring downlink control information and sending a scheduling request when no service is transmitted after the communication terminal is successfully attached.
And when the UE does not have service transmission, the UE monitors the resident sub-band, and if DCI information scrambled by the C-RNTI of the UE is received, uplink or downlink transmission is carried out according to the indication of the base station. The DCI carries scheduling indication information, which includes a service subband number, MCS, NDI, and the like. And the UE jumps to the corresponding sub-band blind detection PDCCH. The base station may schedule the UE to other subbands than the resident subband for service, and when the transmission is finished, the UE returns to the resident subband to wait for the next scheduling. Wherein, DCI refers to Downlink Control Information (Downlink Control Information), MCS refers to Modulation and coding scheme (Modulation and coding scheme), and NDI refers to New Data Indicator (New Data Indicator).
For example, referring to fig. 3, when the base station schedules a user, the subband number indicated in the DCI needs to be offset by (s + n) MHz.
The embodiment provides a repeater-based wireless communication method, which performs corresponding offset when scheduling a terminal accessed to a repeater cell according to bandwidths and offset values of a backhaul frequency band and an access frequency band, so as to ensure successful scheduling of the repeater cell.
Based on the communication system provided in fig. 2 and fig. 3, as a repeater in the communication system, the embodiment provides a repeater-based wireless communication method suitable for a repeater, including:
the information between the base station and the repeater is transmitted through a return frequency band of a return link for transmitting the information between the base station and the repeater, and the information between the repeater and the terminal is transmitted through an access frequency band of an access link for transmitting the information between the repeater and the terminal;
the return frequency band is different from the access frequency band, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
The repeater provided by the embodiment realizes the isolation of access and return by frequency isolation, sets the return link and the access link as different frequencies, and adopts two frequencies which are far apart for access and return transmission. The frequency points of the return link and the access link are planned according to the power frequency, which can be continuous frequency bands or discrete frequency points, and the requirement of consistency of paired frequency point offset values is met. For example, as shown in fig. 3, the backhaul link and the access link are set to have bandwidths of s MHz and are separated by n MHz.
In this embodiment, a backhaul frequency band of a backhaul link for transmitting information between a base station and a repeater is different from an access frequency band of an access link for transmitting information between the repeater and a terminal, and paired frequency point offset values in the backhaul frequency band and the access frequency band are the same. The frequency isolation is performed on the access frequency band and the return frequency band, and due to the frequency isolation, when a terminal performs cell search, the frequency band of a base station cell needs to be searched first, and then the frequency band of a repeater cell needs to be searched, and the base station also needs to send a broadcast signal and a synchronization signal of the repeater. Because the access frequency band is different from the return frequency band, the repeater station can not generate interference to the base station, and communication can be ensured under the condition of not being influenced by the repeater station only by relatively simply changing the configuration information of the base station and the terminal.
Fig. 7 is a schematic structural diagram of the terminal provided in this embodiment, referring to fig. 7, the terminal includes a first searching module 701, a second searching module 702, and a residing module 703, wherein,
a first searching module 701, configured to, when performing cell search, acquire a first frequency band in which a preconfigured base station cell is located, and search for a cell with a signal strength meeting a requirement on the first frequency band;
a second searching module 702, configured to, if a cell whose signal strength meets the requirement cannot be searched in the first frequency band, obtain a second frequency band in which a pre-configured repeater cell is located, and search for a cell whose signal strength meets the requirement in the second frequency band;
a camping module 703, configured to camp on a target cell, where a cell that is searched on the second frequency band and whose signal strength meets a requirement is used as the target cell;
the return frequency band of a return link for transmitting information between the base station and the repeater is different from the access frequency band of an access link for transmitting information between the repeater and the terminal, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
The terminal provided in this embodiment is suitable for the repeater-based wireless method corresponding to the terminal provided in the above embodiment, and details are not repeated herein.
Fig. 8 is a schematic structural diagram of a base station provided in this embodiment, and referring to fig. 8, the base station includes a sending module 801, wherein,
a sending module 801, configured to periodically send a first broadcast signal and a first synchronization signal corresponding to a terminal, and send a second broadcast signal and a second synchronization signal corresponding to a repeater;
the return frequency band of a return link for transmitting information between the base station and the repeater is different from the access frequency band of an access link for transmitting information between the repeater and the terminal, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
The base station provided in this embodiment is suitable for the repeater-based wireless method corresponding to the base station provided in the above embodiment, and details are not repeated herein.
Fig. 9 is a schematic structural diagram of a repeater according to this embodiment, and referring to fig. 8, the repeater includes a transmission module 901, wherein,
a transmission module 901, configured to transmit information between the base station and the repeater through a backhaul frequency band of a backhaul link for transmitting information between the base station and the repeater, and transmit information between the repeater and the terminal through an access frequency band of an access link for transmitting information between the repeater and the terminal;
the return frequency band is different from the access frequency band, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
The repeater provided in this embodiment is suitable for the repeater-based wireless method corresponding to the repeater provided in the above embodiment, and will not be described herein again.
The embodiment provides a wireless communication terminal based on a repeater, a base station and the repeater, wherein a return frequency band of a return link for transmitting information between the base station and the repeater is different from an access frequency band of an access link for transmitting information between the repeater and the terminal, and paired frequency point deviation values in the return frequency band and the access frequency band are the same. The frequency isolation is performed on the access frequency band and the return frequency band, and due to the frequency isolation, when a terminal performs cell search, the frequency band of a base station cell needs to be searched first, and then the frequency band of a repeater cell needs to be searched, and the base station also needs to send a broadcast signal and a synchronization signal of the repeater. Because the access frequency band is different from the return frequency band, the repeater station can not generate interference to the base station, and communication can be ensured under the condition of not being influenced by the repeater station only by relatively simply changing the configuration information of the base station and the terminal.
The embodiment provides a repeater-based wireless communication system, which comprises a base station, a repeater and a terminal, and is shown in figure 2;
the return frequency band of a return link for transmitting information between a base station and a repeater is different from the access frequency band of an access link for transmitting information between the repeater and a terminal, and paired frequency point offset values in the return frequency band and the access frequency band are the same;
the terminal is used for executing any method corresponding to the terminal, the base station is used for any method corresponding to the base station, and the repeater is used for any method corresponding to the repeater.
The embodiment provides an electronic device, including:
at least one processor, at least one memory, a communication interface, and a bus; wherein,
the processor, the memory and the communication interface complete mutual communication through the bus;
the communication interface is used for information transmission between the electronic equipment and communication equipment of the repeater or the base station;
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform any of the above methods corresponding to a terminal.
The present embodiments provide a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform the method corresponding to the terminal described in any one of the above.
The embodiment provides an electronic device, including:
at least one processor, at least one memory, a communication interface, and a bus; wherein,
the processor, the memory and the communication interface complete mutual communication through the bus;
the communication interface is used for information transmission between the electronic equipment and communication equipment of the repeater or the terminal;
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform any of the above methods corresponding to a base station.
The present embodiments provide a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform any of the methods described above for a base station.
The embodiment provides an electronic device, including:
at least one processor, at least one memory, a communication interface, and a bus; wherein,
the processor, the memory and the communication interface complete mutual communication through the bus;
the communication interface is used for information transmission between the electronic equipment and communication equipment of a base station or a terminal;
the memory stores program instructions executable by the processor, the processor calls the program instructions to perform any of the methods described above corresponding to a repeater.
The present embodiments provide a non-transitory computer readable storage medium storing computer instructions that cause the computer to perform any of the above described methods corresponding to a repeater.
In this embodiment, a backhaul frequency band of a backhaul link for transmitting information between a base station and a repeater is different from an access frequency band of an access link for transmitting information between the repeater and a terminal, and paired frequency point offset values in the backhaul frequency band and the access frequency band are the same. The frequency isolation is performed on the access frequency band and the return frequency band, and due to the frequency isolation, when a terminal performs cell search, the frequency band of a base station cell needs to be searched first, and then the frequency band of a repeater cell needs to be searched, and the base station also needs to send a broadcast signal and a synchronization signal of the repeater. Because the access frequency band is different from the return frequency band, the repeater station can not generate interference to the base station, and communication can be ensured under the condition of not being influenced by the repeater station only by relatively simply changing the configuration information of the base station and the terminal.
To summarize, in the communication system, a repeater and a base station transmit over an inter-frequency. In order to adapt to the characteristic that the repeater and the base station transmit through different frequencies, the base station increases the synchronization of the repeater cell and the transmission of broadcast signals, the base station increases the deviation of the frequency point number when dispatching the users of the repeater cell, in addition, the terminal searches the macro base station cell firstly, and then searches the repeater cell after the search fails. Therefore, the interference of the repeater to the base station can be avoided by simply modifying the base station and the terminal.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention, and are not limited thereto; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A wireless communication method based on a repeater is characterized by comprising the following steps:
when cell searching is carried out, a first frequency band where a pre-configured base station cell is located is obtained, and a cell with signal strength meeting requirements is searched on the first frequency band;
if the cell with the signal strength meeting the requirement cannot be searched on the first frequency band, acquiring a second frequency band where a pre-configured repeater cell is located, and searching the cell with the signal strength meeting the requirement on the second frequency band;
taking the cell which is searched on the second frequency band and has the signal strength meeting the requirement as a target cell, and residing in the target cell;
the return frequency band of a return link for transmitting information between the base station and the repeater is different from the access frequency band of an access link for transmitting information between the repeater and the terminal, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
2. The method of claim 1, wherein the obtaining a first frequency band where a pre-configured base station cell is located when performing cell search, and searching for a cell with a signal strength meeting a requirement on the first frequency band comprises:
when cell searching is carried out, acquiring a first frequency band where a pre-configured base station cell is located, and judging whether a cell with a signal-to-noise ratio (SINR) larger than a first threshold value and a Reference Signal Received Power (RSRP) larger than a second threshold value can be searched on the first frequency band;
if a cell with SINR larger than the first threshold and RSRP larger than the second threshold can be searched on the first frequency band, judging that a cell with signal strength meeting requirements can be searched on the first frequency band, taking the searched cell as the target cell, and residing in the target cell;
if the cell with the SINR larger than the first threshold and the RSRP larger than the second threshold cannot be searched on the first frequency band, judging that the cell with the signal strength meeting the requirement cannot be searched on the first frequency band.
3. The method of claim 2, wherein the obtaining a second frequency band where a pre-configured repeater cell is located, and searching for a cell with a signal strength meeting a requirement on the second frequency band comprises:
acquiring a second frequency band where a pre-configured repeater cell is located, and judging whether a cell with an SINR (signal to interference plus noise ratio) larger than the first threshold and an RSRP (reference signal to noise ratio) larger than the second threshold can be searched in the second frequency band;
if a cell with SINR larger than the first threshold value and RSRP larger than the second threshold value can be searched in the second frequency band, the searched cell is the target cell;
and if the cells with SINR larger than the first threshold value and RSRP larger than the second threshold value cannot be searched in the second frequency band, sending out prompt information that the cells with signal strength meeting the requirement cannot be searched in the second frequency band.
4. A wireless communication method based on a repeater is characterized by comprising the following steps:
periodically transmitting a first broadcast signal and a first synchronization signal corresponding to a terminal, and transmitting a second broadcast signal and a second synchronization signal corresponding to a repeater;
the return frequency band of a return link for transmitting information between the base station and the repeater is different from the access frequency band of an access link for transmitting information between the repeater and the terminal, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
5. The method of claim 4, further comprising:
if an instruction for scheduling a target terminal to a target service sub-band to process a service is received, judging whether a frequency band corresponding to a target cell where the target terminal resides is a first frequency band where a base station cell is located or a second frequency band where a repeater cell is located;
if the frequency band corresponding to the target cell where the target terminal resides is the first frequency band where the base station cell is located, the target service sub-band is an actual access sub-band corresponding to the target service sub-band, DCI is generated according to the actual access sub-band, and the DCI is sent to the target terminal;
if the frequency band corresponding to the target cell where the target terminal resides is the second frequency band where the repeater cell is located, acquiring a sub-band obtained after the deviation bandwidth of the target service sub-band to the access frequency band is equal to the deviation value, taking the sub-band as the actual access sub-band, generating DCI according to the actual access sub-band, and sending the DCI to the target terminal through the repeater.
6. A wireless communication method based on a repeater is characterized by comprising the following steps:
the information between the base station and the repeater is transmitted through a return frequency band of a return link for transmitting the information between the base station and the repeater, and the information between the repeater and the terminal is transmitted through an access frequency band of an access link for transmitting the information between the repeater and the terminal;
the return frequency band is different from the access frequency band, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
7. A terminal, comprising:
the first searching module is used for acquiring a first frequency band where a pre-configured base station cell is located when cell searching is carried out, and searching a cell with signal strength meeting requirements on the first frequency band;
a second searching module, configured to, if a cell whose signal strength meets the requirement cannot be searched in the first frequency band, obtain a second frequency band in which a pre-configured repeater cell is located, and search for a cell whose signal strength meets the requirement in the second frequency band;
a residing module, configured to reside in a target cell, where a cell that is searched on the second frequency band and has a signal strength meeting a requirement is used as the target cell;
the return frequency band of a return link for transmitting information between the base station and the repeater is different from the access frequency band of an access link for transmitting information between the repeater and the terminal, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
8. A base station, comprising:
a transmitting module for periodically transmitting a first broadcast signal and a first synchronization signal corresponding to a terminal, and transmitting a second broadcast signal and a second synchronization signal corresponding to a repeater;
the return frequency band of a return link for transmitting information between the base station and the repeater is different from the access frequency band of an access link for transmitting information between the repeater and the terminal, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
9. A repeater, comprising:
the transmission module is used for transmitting information between the base station and the repeater through a return frequency band of a return link for transmitting information between the base station and the repeater and transmitting information between the repeater and the terminal through an access frequency band of an access link for transmitting information between the repeater and the terminal;
the return frequency band is different from the access frequency band, and paired frequency point deviation values in the return frequency band and the access frequency band are the same.
10. A wireless communication system based on a repeater is characterized by comprising a base station, the repeater and a terminal;
the return frequency band of a return link for transmitting information between a base station and a repeater is different from the access frequency band of an access link for transmitting information between the repeater and a terminal, and paired frequency point offset values in the return frequency band and the access frequency band are the same;
wherein, the terminal is used for executing the method of any one of claims 1-3, the base station is used for executing the method of any one of claims 4 or 5, and the repeater is used for executing the method of claim 6.
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