CN101132564B - Base station, relay station, wireless relay communication system and method thereof - Google Patents
Base station, relay station, wireless relay communication system and method thereof Download PDFInfo
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- CN101132564B CN101132564B CN2006101099857A CN200610109985A CN101132564B CN 101132564 B CN101132564 B CN 101132564B CN 2006101099857 A CN2006101099857 A CN 2006101099857A CN 200610109985 A CN200610109985 A CN 200610109985A CN 101132564 B CN101132564 B CN 101132564B
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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
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Abstract
This invention provides a base station, relay stations, a radio relay communication system and a method, in which, the radio relay communication system includes a base station and relay stations, and the base station is used in distributing physical resources to relay stations and terminals controlled by them, setting up radio links with the relay stations to communicate with them, the relay stations are used in communicating with the base station via the links for transferring down-line service sent by the base station and up-line service sent by terminals.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to a kind of base station, relay station, wireless relay communication system and method.
Background technology
Proposed a kind of BWA in the prior art, the network topology structure schematic diagram of this system as shown in Figure 1.This system comprises two parts, base station and terminal.Terminal is responsible for initiating and producing service request from user, receives from service in base station.The base station receives the service request of self terminal, and this service request is linked into backbone network, simultaneously, will be handed down to terminal from the service request of backbone network.BTS management and the one or more terminals of control.
Because the design complexity of base station, therefore the expense costliness, can be provided with simplicity of design, low-cost relay station in above-mentioned BWA, enlarge the coverage of above-mentioned BWA by relay station, and improve the capacity of above-mentioned BWA.Be provided with relay station BWA structure as shown in Figure 2.
In BWA shown in Figure 2, the design of relay station is very crucial, a kind of simple relay station is a transponder in the prior art, this relay station is after receiving all base station down signals, be not transmitted to terminal after this base station down signal do not made any change, simultaneously after receiving all terminal upward signals, do not send to the base station after this terminal upward signal do not made any change.Therefore, this relay station only has forwarding capability.
Another relay station has increased some simple and necessary measurement functions in the prior art on the basis of forwarding capability, and can further increase certain scheduling feature.This relay station can carry out some scheduling according to base station and the link circuit condition of oneself.
But above-mentioned design with relay station of scheduling feature of the prior art also is in the conceptual phase at present, does not also have the design and the programme of work of concrete relay station.
Summary of the invention
The purpose of this invention is to provide a kind of base station, relay station, wireless relay communication system and method, thereby realized that the relay station of employing simplicity of design in wireless system enlarges the coverage of base station, improves the capacity of base station.
The objective of the invention is to be achieved through the following technical solutions:
A kind of base station of wireless communication system comprises:
Resource distribution module is used for terminal distribution ascending physical signal resource and the downlink physical resource controlled to each relay station and each relay station, sends the assignment information of described physical resource;
The link establishment module is used to set up the Radio Link between base station and each relay station;
Communication module is used for by described Radio Link, and communicates between each relay station.
Described base station also comprises:
The professional transmission and receiver module, be used to produce terminal is arrived in the base station to relay station, base station downlink business, and receive the assignment information of described physical resource, and send downlink business according to described physical source distributing information to relay station and terminal, simultaneously the uplink service of receiving terminal or relay station in the physical resource of described distribution.
Described base station also comprises:
The sign distribution module is used for distributing an identification marking or link identification to each relay station.
Described communication module specifically comprises:
Adjust the transmitting signaling downwards module synchronously, be used for the Radio Link by described link establishment module foundation, the signaling that issues reception downlink business and time difference, reception uplink service between the transmission downlink business that carries each relay station and the time difference information that sends uplink service is to each relay station;
The physical resource position signaling issues module, is used for the Radio Link set up by the link establishment module, and the signaling that issues the positional information of the downlink physical resource of carrying each relay station and ascending physical signal resource is given each relay station;
Transmit traffic signaling and issue module, be used for the Radio Link set up by the link establishment module, issue the signaling of carrying the business information that each relay station need transmit and give each relay station.
The reception downlink business of the relay station that each jumping figure that described synchronous adjustment transmitting signaling downwards module issues is identical with send time difference between the downlink business, receive uplink service and send the value of time difference of uplink service identical, and the identical relay station of each jumping figure to transmit the shared frequency of certain physical resource identical with the frequency that described base station receives this physical resource.
The positional information that described physical resource position signaling issues the downlink physical resource that module issues is the actual position information of this downlink business when base station down is launched; The positional information that described physical resource position signaling issues the ascending physical signal resource that module issues is the positional information that relay station receives this uplink service.
Described communication module also comprises:
Report processing module, be used to receive and handle the measurement result that relay station reports to the base station.
A kind of relay station of wireless communication system comprises:
Adjust the signaling receiver module synchronously, be used for by and the base station between Radio Link carrying of receiving that the base station issues receive downlink business and send time difference between the downlink business, receive uplink service and send the signaling of the time difference information of uplink service, obtain and preserve the reception downlink business in this signaling and send time difference between the downlink business, receive uplink service and send the time difference information of uplink service;
Physical resource position signaling receiver module, be used for by and the base station between Radio Link receive the signaling of the positional information of carrying downlink physical resource and ascending physical signal resource that the base station issues, obtain and preserve the downlink physical resource in this signaling and the positional information of ascending physical signal resource;
Transmit the traffic signaling receiver module, be used for by and the base station between Radio Link carrying of receiving that the base station issues need the signaling of the business information that this relay station transmits, obtain and preserve the business information that this relay station of needs in this signaling is transmitted.
Described relay station also comprises:
Descending forwarding module, the downlink physical resource location information according to physical resource position signaling receiver module is preserved receives the downlink business that the base station issues in corresponding position; According to the reception downlink business of synchronous adjustment signaling receiver module preservation and the time difference information between the transmission downlink business, described downlink business is transmitted;
The forwarded upstream module is according to the ascending physical signal resource location information of physical resource position signaling receiver module preservation, at the uplink service of corresponding position receiving terminal; According to synchronous adjustment signaling receiver module reception uplink service of preserving and the time difference information that sends uplink service, described uplink service is transmitted.
Described relay station also comprises:
Descending pilot frequency or signaling sending module are used to send descending pilot frequency or the signaling that the base station issues, and wherein descending pilot frequency that relay station sent or the signaling that all father nodes are identical is identical.
Described relay station also comprises:
Measure reporting module, be used for the received signal quality of measuring terminals, the timing slip that terminal arrives relay station, and measurement result is reported the base station.
A kind of wireless relay communication system comprises base station and relay station,
Described base station is used for the terminal distribution physical resource controlled to each relay station and each relay station, set up and each relay station between Radio Link, by communicating between described Radio Link and each relay station;
Described relay station is used for by communicating between described Radio Link and the base station, and the uplink service that downlink business that the base station is issued and terminal send is transmitted.
A kind of wireless relay communication means comprises step:
Radio Link between relay station utilization and the base station is given the base station with the forwards that terminal sends over;
Described base station generates corresponding response message after receiving described message, by the Radio Link between described and the relay station described response message is handed down to described relay station;
Described relay station is transmitted to described terminal with described response message.
Radio Link between described relay station utilization and the base station, specifically comprise to the step of base station the forwards that terminal sends over:
Described relay station utilizes the Radio Link between described relay station and the base station that described initial access request message is transmitted to described base station at the initial access request message of the regional receiving terminal of self-defining access.
Insert Sca and orthogonal frequency division multiplex OFDM physical layer for single carrier SC, single carrier, the terminal initial that transmits between described relay station and the base station inserts request message and comprises that relay station measures frame number and initial access slot, the access state of described terminal and the message that other access state comprises in distance measurement request for successful terminal that described terminal initial that timing slip, the relay station of the power of the described terminal that obtains, the relative relay station of described terminal receive inserts signal.
For OFDM OFDMA physical layer, the terminal initial that transmits between described relay station and base station access request message comprises the power of the described terminal that the relay station measurement obtains, the timing slip of the relative relay station of described terminal; The initial access code that described terminal adopts, the initial access slot that terminal adopts, the access state of described terminal.
Radio Link between described relay station utilization and the base station, specifically comprise to the step of base station the forwards that terminal sends over:
The periodicity of described relay station receiving terminal is adjusted request message, utilizes the Radio Link between described relay station and the base station that described periodicity adjustment request message is transmitted to described base station.
For SC, SCa, OFDM physical layer, the terminal periodic adjustment request message that transmits between described relay station and the base station comprises the adjustment state of the power of the described terminal that the relay station measurement obtains, the timing slip of the relative relay station of described terminal, described terminal and the message that other terminal comprises in periodicity adjustment is asked.
For the OFDMA physical layer, the terminal periodic access request message that transmits between described relay station and the base station comprises the periodicity adjustment state that the power of the described terminal that the relay station measurement obtains, the timing slip of the relative relay station of described terminal, the periodicity access code of described terminal employing, the periodicity access slot of described terminal employing, described terminal adopt.
Also comprise step:
Described relay station deducts the symbol offset in this message and is transmitted to terminal after receiving downlink business and sending time difference between the downlink business after receiving adjustment/bandwidth request message that the base station issues.
It is that the position of base station actual reception terminal signaling deducts and receives downlink business and send time difference between the downlink business that described base station assigns is given the position of the bandwidth request message of described terminal.
Also comprise step:
In the initial access process of relay station, show it is that relay station inserts by the signaling that sets in advance.
As seen from the above technical solution provided by the invention, the present invention is by carrying out detailed design to synchronizing process between the major function of base station, relay station and base station, the relay station etc., thereby proposed a complete wireless relay communication system.The present invention only adds limited function to the base station, has enlarged the coverage of base station, has improved the capacity of base station.Relay station has simplicity of design, low-cost characteristics, and the function of terminal is not changed, and terminal can be compatible fully with existing unrepeatered system.
Description of drawings
Fig. 1 is the network topology structure schematic diagram of a kind of BWA of prior art;
Fig. 2 is provided with the structural representation of the BWA of relay station for prior art;
Fig. 3 is the structural representation of the embodiment of wireless relay communication system of the present invention;
Fig. 4 is the schematic diagram of the synchronizing process between relay station and the base station among the embodiment of the present invention.
Embodiment
The invention provides a kind of base station, relay station, wireless relay communication system and method, core of the present invention is: synchronizing process between the major function of base station, relay station and base station, the relay station etc. is carried out detailed design.Limited function is added in the base station, and relay station has simplicity of design, low-cost characteristics, and the function of terminal is not changed, can be compatible fully with existing unrepeatered system.
Describe the present invention in detail below in conjunction with accompanying drawing, the structure of the embodiment of the described wireless relay communication system of this method comprises base station, relay station and terminal as shown in Figure 3.
In wireless relay communication system of the present invention, base station, relay station and terminal are called the node of relaying transmission network.In order to be different from non-relay network, can claim that the base station of supporting relaying to transmit is a relay base station.
In wireless relay communication system of the present invention, the definition base station is that jumping figure is the node of O, according to the direction that saves terminal from the base station, and node of every increase, the jumping figure of link just increases by a jumping, and the node of jumping the position at N is the N hop node.The definition base station is the father node that directly links to each other with the base station, jumping figure is 1 node, promptly directly links to each other with the base station, jumping figure is that 1 node is the child node of base station.Same, definition links to each other with node n and jumping figure is the father node of node n less than the node of the jumping figure of node n, directly links to each other with node n and jumping figure is the child node of node n greater than the node of the jumping figure of node n.
Base station in the wireless relay communication system of the present invention comprises as lower module:
Resource distribution module 01: the terminal distribution physical resource that is used to each relay station and each relay station to control sends the physical resource information of described distribution.The physical resource of distributing to a relay station can be one or more resource area.The physical resource of distributing to relay station also may be overlapping, and promptly a resource area also may be shared by a plurality of relay stations.Above-mentioned physical resource comprises ascending physical signal resource and downlink physical resource.
The professional transmission and receiver module 02: be used to produce the base station to relay station, the downlink business of terminal is arrived in the base station, and receives the physical resource that described resource distribution module 01 passes over, and sends downlink business according to described physical resource to relay station and terminal; The uplink service of receiving terminal or relay station in the physical resource that resource distribution module 01 passes over simultaneously.
Link establishment module 03: be used to set up and each relay station between Radio Link, the base station is by communicating between this Radio Link and each relay station.
Communication module 04: be used for Radio Link, and communicate between each relay station by 03 foundation of link establishment module.This communication process comprises: the base station to relay station send signaling adjust relay station synchronously, the physical resource position of notice relay station, the business that the notice relay station need be transmitted, the transmitting power of adjusting relay station etc.; Receive and handle relay station to base station reporting measurement result, reception and handle relay station and report the access request of its terminal of controlling and range finding (ranging) request etc. to the base station.
Described base station can also comprise sign distribution module 09: be used for distributing an identification marking or a special link identification to each relay station.This identification marking or link identification need be carried at relay station in the signaling or message of base station or terminal transmission, in order to distinguish relay station.
Communication module 04 comprises: adjust transmitting signaling downwards module 05, physical resource position signaling synchronously and issue module 06, transmit traffic signaling and issue module 07 and report processing module 08.
Wherein, adjust transmitting signaling downwards module 05 synchronously, be used for the Radio Link set up by link establishment module 03, the signaling that issues the DL_Relay_Delay that carries each relay station (receive downlink business and send time difference between the downlink business), UL_Relay_Delay (receive uplink service and send time difference of uplink service) information is given each relay station.The base station makes between each relay station and the base station synchronous by the forwarding moment that above-mentioned DL_Relay_Delay and UL_Relay_Delay adjust each relay station.
Notion synchronous between each relay station and the base station is meant: the relay station that each jumping figure is identical is transmitted the deviation that certain physical resource zero hour and its receive from the base station between moment of this physical resource and is fixed, and promptly the DL_Relay_Delay of the relay station that each jumping figure is identical is identical with UL_Relay_Delay.And it is identical with the frequency that above-mentioned base station receives this physical resource that the relay station that each jumping figure is identical is transmitted the shared frequency of certain physical resource.
The invention provides an embodiment of the synchronizing process between above-mentioned relay station and the base station, the synchronizing process schematic diagram among this embodiment between relay station and the base station as shown in Figure 4.In Fig. 4, relay station 1, relay station 2 and relay station 3 are the identical relay station of jumping figure, relay station 1/ relay station 3 converting downlink pilot tone and signalings, and relay station 2 does not send descending pilot frequency and signaling.The time difference that relay station 1/ relay station 2/ relay station 3 receives between downlink business and the transmission downlink business is identical, and it is identical with the time difference that sends between the uplink service that relay station 1/ relay station 2/ relay station 3 receives uplink services.Relay station 1 and relay station 3 begin to send the time synchronized of descending pilot frequency.
The base station can send to each relay station with above-mentioned DL_Relay_Delay and UL_Relay_Delay by the form of broadcasting.
Wherein, the physical resource position signaling issues module 06, is used for the Radio Link by 03 foundation of link establishment module, and the signaling that issues the positional information of carrying the descending of each relay station and ascending physical signal resource is given each relay station.The positional information of the downlink physical resource that the base station issues is the physical location of downlink business when base station down is launched, but the positional information of the ascending physical signal resource that the base station issues is the position that relay station receives this uplink service, rather than the base station receives the position of this uplink service.Therefore, the zero-time of supposing base station reception uplink service is Allocation_Start_Time_BS, the zero-time that relay station receives uplink service is Allocation_Start_Time_RS, then in the downlink signaling that the base station sends, the zero-time Allocation_Start_Time=Allocation_Start_Time_RS=of uplink service (Allocation_Start_Time_BS-UL_Relay_Delay).
Wherein, transmit traffic signaling and issue module 07, be used for the Radio Link set up by link establishment module 03, issue the signaling of carrying the business information that each relay station need transmit and give each relay station.The business that relay station need be transmitted comprises relay station that jumping figure that broadcast, multicast and broadcasting service, relay station control is bigger or all business of terminal.
Wherein, report processing module 08, be used to receive and handle the measurement result that relay station reports to the base station.
Relay station in the wireless relay communication system of the present invention is by communicating between Radio Link between described and the base station and the base station, and the uplink service that downlink business that the base station is issued and terminal send is transmitted.Described relay station comprises as lower module: signaling receiver module 10, descending forwarding module 14, forwarded upstream module 15, descending pilot frequency or signaling sending module 16 and measurement reporting module 17.
Signaling receiver module 10: be used for by above-mentioned foundation and the base station between Radio Link, receive the base station and issue various signalings.Comprise: adjust signaling receiver module 12, physical resource position signaling receiver module 11 synchronously and transmit traffic signaling receiver module 13.
Wherein, adjust signaling receiver module 12 synchronously, be used for by above-mentioned foundation and the base station between Radio Link, receive the signaling of carrying DL_Relay_Delay and UL_Relay_Delay information that the base station issues, obtain and preserve wherein DL_Relay_Delay and UL_Relay_Delay information.
Wherein, physical resource position signaling receiver module 11, be used for by above-mentioned foundation and the base station between Radio Link, what receive that the base station issues carries descending and signaling ascending physical signal resource location information, obtains and preserve descending and ascending physical signal resource location information wherein.
Wherein, transmit traffic signaling receiver module 13, be used for by above-mentioned foundation and the base station between Radio Link, receive the signaling that needs the own business information of transmitting of carrying that the base station issues, obtain and preserve the business information of needs oneself forwarding wherein.
Descending forwarding module 14: according to the downlink physical resource location information of physical resource position signaling receiver module 11 preservations, receive the downlink business that the base station issues in corresponding position, after finishing receiving, according to the DL_Relay_Delay information that synchronous adjustment signaling receiver module 12 is preserved, above-mentioned downlink business is transmitted.The modulation coding mode that relay station converting downlink business is adopted is identical with the downstream signal modulation coding mode of base station.
Forwarded upstream module 15: according to the ascending physical signal resource location information of physical resource position signaling receiver module 11 preservations, uplink service at corresponding position receiving terminal, after finishing receiving, according to the UL_Relay_Delay information that synchronous adjustment signaling receiver module 12 is preserved, above-mentioned uplink service is transmitted.It is identical with the upward signal modulation coding mode of terminal that relay station is transmitted the modulation coding mode that uplink service adopted.
Descending pilot frequency or signaling sending module 16: be used to send descending pilot frequency or the signaling that the base station issues.And descending pilot frequency that relay station sent or signaling that all father nodes are identical are identical.This module is optional module.Whether relay station sends descending pilot frequency or signaling and adopts which kind of pilot tone to be controlled by the base station.When system applies of the present invention was in existing unrepeatered system, relay station was after the signaling that receives the base station, and needs are transmitted after the symbol offset among the Ranging/BW request (bandwidth request) is wherein deducted UL_Relay_Delay again.
Measure reporting module 17: be used for the received signal quality of measuring terminals, the timing slip that terminal arrives relay station, and measurement result is reported the base station.
Wireless relay communication system of the present invention is not done change to the function of terminal, and the function of terminal is compatible existing unrepeatered system fully.
An embodiment of a kind of wireless relay communication means provided by the invention may further comprise the steps:
Described relay station utilizes the Radio Link between described relay station and the base station that described initial access request message is transmitted to described base station at the initial access request message of the regional receiving terminal of self-defining access.Insert Sca and orthogonal frequency division multiplex OFDM physical layer for single carrier SC, single carrier, the terminal initial that transmits between described relay station and the base station inserts request message and comprises that relay station measures frame number and initial access slot, the access state of described terminal and the message that other access state comprises in distance measurement request for successful terminal that described terminal initial that timing slip, the relay station of the power of the described terminal that obtains, the relative relay station of described terminal receive inserts signal.For OFDM OFDMA physical layer, the terminal initial that transmits between described relay station and base station access request message comprises the power of the described terminal that the relay station measurement obtains, the timing slip of the relative relay station of described terminal; The initial access code that described terminal adopts, the initial access slot that terminal adopts, the access state of described terminal.
The periodicity of perhaps described relay station receiving terminal is adjusted request message, utilizes the Radio Link between described relay station and the base station that described periodicity adjustment request message is transmitted to described base station.For SC, SCa, OFDM physical layer, the terminal periodic adjustment request message that transmits between described relay station and the base station comprises the adjustment state of the power of the described terminal that the relay station measurement obtains, the timing slip of the relative relay station of described terminal, described terminal and the message that other terminal comprises in periodicity adjustment is asked.For the OFDMA physical layer, the terminal periodic access request message that transmits between described relay station and the base station comprises the periodicity adjustment state that the power of the described terminal that the relay station measurement obtains, the timing slip of the relative relay station of described terminal, the periodicity access code of described terminal employing, the periodicity access slot of described terminal employing, described terminal adopt.
Described base station receives and generates corresponding response message after described periodicity is adjusted request message, by the Radio Link between described and the relay station described response message is handed down to described relay station.
Described relay station is transmitted to described terminal with described response message.
Described method can also comprise step:
Described relay station deducts the symbol offset in this signaling and is transmitted to terminal after receiving downlink business and sending time difference between the downlink business after receiving adjustment/bandwidth request signaling that the base station issues.It is that the position of base station actual reception terminal signaling deducts and receives downlink business and send time difference between the downlink business that described base station assigns is given the position of the bandwidth request signaling of described terminal.
Described method can also comprise step:
In the initial access process of relay station, show it is that relay station inserts by the signaling that sets in advance.
The initiating ranging process of the relay station of the described wireless relay communication system of the invention described above and periodicity adjustment process are as follows:
To SC, Sca and OFDM physical layer, the initiating ranging process of relay station comprises the steps:
1, relay station is at first set up down-going synchronous with the base station, obtains descending and the uplink parameter.
2, relay station selects a time slot range finding access slot to send distance measurement request message from the initial ranging interval that the base station issues at random, and this distance measurement request message comprises that the MAC Address of relay station, request send the quality requirement of downstream signal, the sign of relay station etc.
Relay station also increases a signaling in above-mentioned distance measurement request message, show it is that relay station inserts, and is not that ordinary terminal inserts, and this signaling is:
Access device type (Type of Access Station): 0:Relay Station;
If this signaling does not show that then access device is a terminal.
If 3 base stations receive the initial ranging request message of relay station but can not decipher, then the base station sends ranging response to relay station by broadcast, timing, frequency and the power adjustment, the distance measuring states that comprise the relay station of requirement in this message, and relay station sends frame number, the timeslot number of the request of access.Relay station by judging access request frame number and the timeslot number in the response message, determines to issue the response message of oneself after receiving this broadcast.Resend next distance measurement request message after then the adjustment amount of formulating according to the base station is adjusted.
If the base station successfully receives the initial ranging request message of relay station, then the base station is relay station distribute links sign, and sending distance measurement request response message to relay station, ranging response message comprises the chain line, distance measuring states of timing adjustment amount, capability correction amount, the frequency adjustment amount of the relay station of requirement, the MAC Address of relay station, the relay station of distributing to etc.Relay station is judged this message to one's name by MAC Address wherein after receiving above-mentioned response message.If distance measuring states is successfully, then finish the distance measurement request process.
If the distance measuring states in the ranging response of 4 base stations is for abandoning, then relay station discharges current channel after receiving above-mentioned ranging response message, changes next physical channel over to and restarts initiating ranging process.
If relay station waits for that the regular hour does not receive above-mentioned ranging response message yet after sending range finding, then relay station sends a ranging code of selecting at random again at the suitable initial ranging time slot of the next one, and transmitting power improved, reach maximum up to transmitting power, get back to minimum emissive power then.If relay station is not waited until ranging response yet after the initial ranging request of retransmitting some, then relay station thinks that this down channel is unavailable, begins to scan new down channel.
To the OFDMA physical layer, the initiating ranging process of relay station comprises the steps:
1, relay station is at first set up down-going synchronous with the base station, obtains descending and the uplink parameter.
2, relay station is selected a ranging code at random from initial ranging sign indicating number territory, selects an initial ranging time slot from the initial ranging time slot that the base station issues at random, sends selected ranging code in selected ranging slot.
Relay station also increases a signaling in above-mentioned ranging code, show it is that relay station inserts, and is not that ordinary terminal inserts, and this signaling is:
Access device type (Type of Access Station): 0:Relay Station;
If this signaling does not show that then access device is a terminal.
3, the base station is after the ranging code that successfully receives relay station, if the judgement state is successfully, then send ranging response message to relay station, ranging code in the ranging response message and range finding access slot are set to the ranging code and the ranging slot of relay station initialization initial ranging, and the relay station that comprises requirement regularly, frequency and capability correction amount, simultaneously, the base station is that relay station distributes bandwidth so that relay station sends distance measurement request.
The base station is after the ranging code that successfully receives relay station, if the judgement state is for continuing, then send ranging response message to terminal, ranging code in the ranging response message and range finding access slot are set to the ranging code and the ranging slot of relay station initialization initial ranging, and comprise relay station timing, frequency and the capability correction amount of requirement.
Relay station is proofreaied and correct according to the requirement of ranging response message after being the ranging response message that continues at the state of receiving, and from available initial ranging zone, selects ranging slot to transmit the ranging code of selecting at random at random from Perodic ranging sign indicating number territory.
If 4 relay stations wait for that the regular hour does not receive ranging response yet after sending ranging code, then send a ranging code of selecting at random again at the suitable initial ranging time slot of the next one, and transmitting power improved, reach maximum up to transmitting power, get back to minimum emissive power then.If relay station is not waited until ranging response yet after the initial ranging request of retransmitting some, then relay station thinks that this down channel is unavailable, begins to scan new down channel.
The Perodic ranging process of relay station is as follows:
For SC (Single Carrier, single carrier), Sca (Single Carrier Access, the single carrier access), OFDM (OFDM) physical layer, relay station and base station utilize distance measurement request and ranging response message to carry out Perodic ranging, so that safeguard the link-quality between relay station and the base station.Range finding can be a base station triggers, and promptly the base station initiatively initiatively distributes bandwidth to relay station to relay station transmission ranging response or base station.The Perodic ranging process of relay station comprises the steps:
1, to each relay station, timer of base station maintenance, when timer overflowed, the base station assigns bandwidth was given relay station, and timer is resetted.Each base station assigns bandwidth is given relay station, and this timer all resets.
If relay station in particular time interval, is not all received the allocated bandwidth of base station, then relay station thinks that this up link is unavailable, will reselect new down channel, inserts again.
2, after having distributed upstream bandwidth for relay station, the upward signal that whether receives relay station will be judged in the base station at every turn, if repeatedly do not receive upward signal, then the base station thinks that relay station is unavailable, stops the management to this relay station link.If receive the upward signal of relay station, the base station is the decision signal quality, if signal quality can receive and upstream data in comprise distance measurement request message, then the base station issues the ranging response message of state for " success ".If signal quality is unacceptable, then the base station issue state for the ranging response message of " continuations " to relay station, the control information of necessity is included in issues relay station in the ranging response message simultaneously.If the base station has sent correction message many times, the signal quality of SS still is unacceptable, and then the base station transmit status is given relay station for the ranging response message of " abandoning ", stops the management to relay station simultaneously.
3, relay station should respond each and distribute to his upstream bandwidth assignment.If the ranging response message state that receives recently is " continuation ", then the alignment requirements of giving according to ranging response message is adjusted the back and is sent upstream data to relay station, and the data that sent comprise distance measurement request message.If the ranging response message state that receives recently is " success ", then relay station transmits the upstream bandwidth that be distributed forever the data of oneself.If there are not data to pass, relay station just transmits with padding data.If the ranging response message state that receives recently is " abandoning ", then relay station stops the reception of base station is entered at new channel again.
To Wireless-MAN OFDMA, the Perodic ranging process and the initiating ranging process of relay station are similar, and just relay station need be selected ranging code at random from Perodic ranging sign indicating number territory, and sends at the Perodic ranging time slot.
In the described wireless relay communication system of the invention described above, in the relay station control range, the initial access process that terminal is transmitted by relay station comprises the steps:
1, relay station is after receiving the signaling of base station, is transmitted to terminal after the symbol offset among the range finding/bandwidth request Ranging/BWrequest in the signaling is deducted UL_Relay_Delay.
2, relay station is at the initial access request message of the regional receiving terminal of self-defining access.Its function be equivalent to existing unrepeatered system in the processing of base station under same case that set.
3, the relay station set up of relay station utilization and the link between the base station are issued the base station with the corresponding initial request message that inserts of received terminal.For SC, Sca, OFDM physical layer, this message comprises the power of the terminal that relay station measures, timing slip result, frame number, initial access slot, access state (continuing or success) and the message (if access state be successfully) of other terminal in RNG-REQ of the relative relay station of terminal.For OFDMA (OFDM) physical layer, this message comprises the power of terminal, the timing slip result of the relative relay station of terminal, initial access code, initial access slot, access state (continuing or success).
4, the base station receives that relay station sends comprise terminal corresponding initial insert request message after, generate corresponding response message.Distribute upstream bandwidth to give terminal if desired, then the base station need send corresponding above-mentioned synchronous adjustment signaling, resource physical location signaling to relay station, and relay station is transmitted to terminal with the signaling that receives again.
5, repeat above-mentioned steps 1～4 up to end ranging process, thereby finish the initial access process of terminal.
In the described wireless relay communication system of the invention described above, in the relay station control range, the periodicity adjustment process that terminal is transmitted by relay station is as follows:
The periodicity of described relay station receiving terminal is adjusted request message, utilizes the Radio Link between described relay station and the base station that described periodicity adjustment request message is transmitted to described base station; Described base station receives and generates corresponding response message after described periodicity is adjusted request message, by the Radio Link between described relay station and the base station described response message is handed down to described relay station, described relay station is transmitted to described terminal with described response message; Periodicity adjustment process up to described terminal finishes.
To SC, SCa, OFDM physical layer, the base station assigns bandwidth is carried out periodicity adjustment to terminal, adjustment process is compatible unrepeatered system of the prior art fully, distribute upstream bandwidth to give terminal if desired, then the base station need send corresponding above-mentioned synchronous adjustment signaling, resource physical location signaling to relay station, and relay station is transmitted to terminal with the signaling that receives again.
To the OFDMA physical layer, the initial access process that the periodicity adjustment process of terminal and foregoing terminal are transmitted by relay station is similar, the access slot that just wherein terminal adopted is the periodicity access slot, and the access code that is adopted is the sign indicating number in the periodicity access code territory.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (21)
1. the base station of a wireless communication system is characterized in that, comprising:
Resource distribution module is used for terminal distribution ascending physical signal resource and the downlink physical resource controlled to each relay station and each relay station, sends the assignment information of described physical resource;
The link establishment module is used to set up the Radio Link between base station and each relay station;
Communication module is used for by described Radio Link, and communicates between each relay station;
Described communication module specifically comprises:
Adjust the transmitting signaling downwards module synchronously, be used for the Radio Link by described link establishment module foundation, the signaling that issues reception downlink business and time difference, reception uplink service between the transmission downlink business that carries each relay station and the time difference information that sends uplink service is to each relay station;
The physical resource position signaling issues module, is used for the Radio Link set up by the link establishment module, and the signaling that issues the positional information of the downlink physical resource of carrying each relay station and ascending physical signal resource is given each relay station;
Transmit traffic signaling and issue module, be used for the Radio Link set up by the link establishment module, issue the signaling of carrying the business information that each relay station need transmit and give each relay station.
2. base station according to claim 1 is characterized in that, described base station also comprises:
The professional transmission and receiver module, be used to produce terminal is arrived in the base station to relay station, base station downlink business, and receive the assignment information of described physical resource, and send downlink business according to described physical source distributing information to relay station and terminal, simultaneously the uplink service of receiving terminal or relay station in the physical resource of described distribution.
3. base station according to claim 1 is characterized in that, described base station also comprises:
The sign distribution module is used for distributing an identification marking or link identification to each relay station.
4. base station according to claim 1, it is characterized in that, the reception downlink business of the relay station that each jumping figure that described synchronous adjustment transmitting signaling downwards module issues is identical with send time difference between the downlink business, receive uplink service and send the value of time difference of uplink service identical, and the identical relay station of each jumping figure to transmit the shared frequency of certain physical resource identical with the frequency that described base station receives this physical resource.
5. base station according to claim 1 is characterized in that, the positional information that described physical resource position signaling issues the downlink physical resource that module issues is the actual position information of this downlink business when base station down is launched; The positional information that described physical resource position signaling issues the ascending physical signal resource that module issues is the positional information that relay station receives this uplink service.
6. base station according to claim 1 is characterized in that, described communication module also comprises:
Report processing module, be used to receive and handle the measurement result that relay station reports to the base station.
7. the relay station of a wireless communication system is characterized in that, comprising:
Adjust the signaling receiver module synchronously, be used for by and the base station between Radio Link carrying of receiving that the base station issues receive downlink business and send time difference between the downlink business, receive uplink service and send the signaling of the time difference information of uplink service, obtain and preserve the reception downlink business in this signaling and send time difference between the downlink business, receive uplink service and send the time difference information of uplink service;
Physical resource position signaling receiver module, be used for by and the base station between Radio Link receive the signaling of the positional information of carrying downlink physical resource and ascending physical signal resource that the base station issues, obtain and preserve the downlink physical resource in this signaling and the positional information of ascending physical signal resource;
Transmit the traffic signaling receiver module, be used for by and the base station between Radio Link carrying of receiving that the base station issues need the signaling of the business information that this relay station transmits, obtain and preserve the business information that this relay station of needs in this signaling is transmitted.
8. relay station according to claim 7 is characterized in that, described relay station also comprises:
Descending forwarding module, the downlink physical resource location information according to physical resource position signaling receiver module is preserved receives the downlink business that the base station issues in corresponding position; According to the reception downlink business of synchronous adjustment signaling receiver module preservation and the time difference information between the transmission downlink business, described downlink business is transmitted;
The forwarded upstream module is according to the ascending physical signal resource location information of physical resource position signaling receiver module preservation, at the uplink service of corresponding position receiving terminal; According to synchronous adjustment signaling receiver module reception uplink service of preserving and the time difference information that sends uplink service, described uplink service is transmitted.
9. according to claim 7 or 8 described relay stations, it is characterized in that described relay station also comprises:
Descending pilot frequency or signaling sending module are used to send descending pilot frequency or the signaling that the base station issues, and wherein descending pilot frequency that relay station sent or the signaling that all father nodes are identical is identical.
10. according to claim 7 or 8 described relay stations, it is characterized in that described relay station also comprises:
Measure reporting module, be used for the received signal quality of measuring terminals, the timing slip that terminal arrives relay station, and measurement result is reported the base station.
11. a wireless relay communication system is characterized in that, comprises as each described base station of claim 1 to 6 with as each described relay station of claim 7 to 10,
Described base station is used for the terminal distribution physical resource controlled to each relay station and each relay station, set up and each relay station between Radio Link, by communicating between described Radio Link and each relay station;
Described relay station is used for by communicating between described Radio Link and the base station, and the uplink service that downlink business that the base station is issued and terminal send is transmitted.
12. a wireless relay communication means is characterized in that, comprises step:
As each described relay station utilization of claim 7 to 10 with as the Radio Link between each described base station of claim 1 to 6, give the base station with the forwards that terminal sends over;
Described base station generates corresponding response message after receiving described message, by the Radio Link between described and the relay station described response message is handed down to described relay station;
Described relay station is transmitted to described terminal with described response message.
13. method according to claim 12 is characterized in that, the Radio Link between described relay station utilization and the base station specifically comprises to the step of base station the forwards that terminal sends over:
Described relay station utilizes the Radio Link between described relay station and the base station that described initial access request message is transmitted to described base station at the initial access request message of the regional receiving terminal of self-defining access.
14. method according to claim 13 is characterized in that,
Insert Sca and orthogonal frequency division multiplex OFDM physical layer for single carrier SC, single carrier, the terminal initial that transmits between described relay station and the base station inserts request message and comprises that relay station measures frame number and initial access slot, the access state of described terminal and the message that other access state comprises in distance measurement request for successful terminal that described terminal initial that timing slip, the relay station of the power of the described terminal that obtains, the relative relay station of described terminal receive inserts signal.
15. method according to claim 13 is characterized in that,
For OFDM OFDMA physical layer, the terminal initial that transmits between described relay station and base station access request message comprises the initial access code of the power of the described terminal that the relay station measurement obtains, the timing slip of the relative relay station of described terminal, the employing of described terminal, the initial access slot that terminal adopts, the access state of described terminal.
16. method according to claim 12 is characterized in that, the Radio Link between described relay station utilization and the base station specifically comprises to the step of base station the forwards that terminal sends over:
The periodicity of described relay station receiving terminal is adjusted request message, utilizes the Radio Link between described relay station and the base station that described periodicity adjustment request message is transmitted to described base station.
17. method according to claim 16 is characterized in that,
For SC, SCa, OFDM physical layer, the terminal periodic adjustment request message that transmits between described relay station and the base station comprises the adjustment state of the power of the described terminal that the relay station measurement obtains, the timing slip of the relative relay station of described terminal, described terminal and the message that other terminal comprises in periodicity adjustment is asked.
18. according to right 16 described methods, it is characterized in that,
For the OFDMA physical layer, the terminal periodic access request message that transmits between described relay station and the base station comprises the periodicity adjustment state that the power of the described terminal that the relay station measurement obtains, the timing slip of the relative relay station of described terminal, the periodicity access code of described terminal employing, the periodicity access slot of described terminal employing, described terminal adopt.
19. method according to claim 16 is characterized in that, also comprises step:
Described relay station deducts the symbol offset in this message and is transmitted to terminal after receiving downlink business and sending time difference between the downlink business after receiving adjustment/bandwidth request message that the base station issues.
20. method according to claim 16 is characterized in that,
It is that the position of base station actual reception terminal signaling deducts and receives downlink business and send time difference between the downlink business that described base station assigns is given the position of the bandwidth request message of described terminal.
21. method according to claim 12 is characterized in that, also comprises step:
In the initial access process of relay station, show it is that relay station inserts by the signaling that sets in advance.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101099857A CN101132564B (en) | 2006-08-25 | 2006-08-25 | Base station, relay station, wireless relay communication system and method thereof |
| PCT/CN2007/070483 WO2008025282A1 (en) | 2006-08-25 | 2007-08-15 | Base station, relay station, wireless relay communication system and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2006101099857A CN101132564B (en) | 2006-08-25 | 2006-08-25 | Base station, relay station, wireless relay communication system and method thereof |
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| Publication Number | Publication Date |
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| CN101132564A CN101132564A (en) | 2008-02-27 |
| CN101132564B true CN101132564B (en) | 2011-09-14 |
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| WO (1) | WO2008025282A1 (en) |
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| US8902805B2 (en) * | 2008-10-24 | 2014-12-02 | Qualcomm Incorporated | Cell relay packet routing |
| JP5131155B2 (en) * | 2008-10-28 | 2013-01-30 | アイコム株式会社 | Wireless communication system, wireless communication method, relay device, and wireless terminal device |
| CN101790245B (en) * | 2009-01-22 | 2015-05-13 | 中兴通讯股份有限公司 | Control information sending and receiving method of distributed relay station and transceiving system |
| CN101790241B (en) * | 2009-01-22 | 2015-05-13 | 中兴通讯股份有限公司 | Control information sending and receiving method of distributed relay station and transceiving system |
| CN101867872B (en) * | 2009-04-20 | 2012-12-12 | 电信科学技术研究院 | Method and system for forwarding data to relay node through base station |
| CN101895987B (en) * | 2009-05-22 | 2013-05-08 | 中兴通讯股份有限公司 | Method and system for uplink resource configuration indication and data transmission of return link |
| CN101932102B (en) | 2009-06-19 | 2013-01-23 | 华为技术有限公司 | Service bearing mapping method and communication equipment thereof |
| CN101931961A (en) | 2009-06-23 | 2010-12-29 | 华为技术有限公司 | Method, system and equipment for realizing return link control channel transmission of relay system |
| CN101938344A (en) * | 2009-06-29 | 2011-01-05 | 宏达国际电子股份有限公司 | Method for handling transmission status and related communication device |
| CN102036386B (en) * | 2009-09-29 | 2014-12-10 | 中兴通讯股份有限公司 | LTE-A system and resource distribution method of physical downlink control channel of relay link |
| CN102111214A (en) * | 2009-12-28 | 2011-06-29 | 中兴通讯股份有限公司 | Base station, relay node as well as notification method and system of configuration information of relay subframe |
| CN102143576B (en) * | 2010-01-29 | 2014-12-10 | 中兴通讯股份有限公司 | Terminal positioning system and terminal positioning method |
| CN102149196B (en) * | 2010-02-09 | 2014-11-05 | 北京邮电大学 | Bandwidth allocation method, base station and relay |
| US9871643B2 (en) * | 2010-02-12 | 2018-01-16 | Mitsubishi Electric Corporation | Mobile communication system |
| CN102238563A (en) | 2010-04-21 | 2011-11-09 | 华为终端有限公司 | Wireless connection method and equipment |
| JP5581975B2 (en) * | 2010-07-07 | 2014-09-03 | ソニー株式会社 | COMMUNICATION CONTROL DEVICE, COMMUNICATION CONTROL METHOD, COMMUNICATION SYSTEM, AND COMMUNICATION DEVICE |
| CN103249155B (en) * | 2013-04-22 | 2016-01-06 | 东南大学 | A kind of resource allocation methods of OFDM wireless relay network system |
| CN103491634B (en) * | 2013-09-13 | 2016-06-22 | 宁波大学 | Based on the resource allocation methods of minimum power in multi-user cooperative relay system |
| CN105451271B (en) * | 2014-09-05 | 2019-07-02 | 中兴通讯股份有限公司 | A kind of method for managing resource and device |
| CN104702350B (en) * | 2015-03-31 | 2017-03-08 | 中国航空无线电电子研究所 | A kind of radio ranging system in aviation wireless communication system |
| US10687309B2 (en) * | 2015-05-08 | 2020-06-16 | Texas Instruments Incorporated | Enhanced broadcast transmission in unslotted channel hopping medium access control |
| US10567069B2 (en) * | 2016-04-28 | 2020-02-18 | Netgear, Inc. | Repeater bandwidth, radio configuration, and ADC clock speed adjustment |
| WO2017221874A1 (en) * | 2016-06-20 | 2017-12-28 | 日本電信電話株式会社 | Optical transmission device and bandwidth allocating method |
| CN108235404B (en) * | 2016-12-22 | 2020-12-25 | 上海未来宽带技术股份有限公司 | Method and system for realizing wireless network relay |
| CN113316167A (en) * | 2017-03-24 | 2021-08-27 | 华为技术有限公司 | Information indication method and device |
| US10805874B1 (en) | 2019-02-25 | 2020-10-13 | Sprint Communications Company L.P. | Frequency channel lock in wireless data relays |
| CN110798262B (en) * | 2019-10-23 | 2023-02-24 | 中国海洋大学 | Underwater wireless optical communication network |
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