CN102215060A - Configuration and indication method of relay sub-frames as well as method and system for realizing relay transmission - Google Patents

Configuration and indication method of relay sub-frames as well as method and system for realizing relay transmission Download PDF

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CN102215060A
CN102215060A CN2010101573905A CN201010157390A CN102215060A CN 102215060 A CN102215060 A CN 102215060A CN 2010101573905 A CN2010101573905 A CN 2010101573905A CN 201010157390 A CN201010157390 A CN 201010157390A CN 102215060 A CN102215060 A CN 102215060A
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subframe
frame
uplink
sub
relay
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吴栓栓
毕峰
夏树强
梁枫
袁明
杨瑾
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ZTE Corp
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ZTE Corp
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Abstract

The invention provides a configuration and indication method of relay sub-frames as well as a method and system for realizing relay transmission, wherein the methods and system provided by the invention are applied to a TDD (time division duplex) system comprising at least one base station and a relay station. The configuration method comprises the following steps: aiming at uplink and downlink configurations on used sub-frames, creating one or more relay sub-frame configuration sets for carrying out uplink and downlink communications between the base station and the relay station; and forming a sub-frame combination by an uplink sub-frame and each downlink sub-frame in the same relay sub-frame configuration set, wherein the sub-frame combination is one of combinations of uplink sub-frames and downlink sub-frames for downlink service transmission and corresponding uplink ACK (acknowledgement)/NACK (negative acknowledgement) feedback information transmission under the uplink and downlink configuration of the sub-frames defined in TDD LTE (long term evolution) Release-8. The invention also provides a corresponding indication method as well as a method and system for realizing the relay transmission. The relay station is used in the system, thus ensuring the backward compatibility for terminals.

Description

The method and system of the configuration of relay sub-frame and indicating means, realization relay transmission
Technical field
The present invention relates to communication technical field, relate in particular to a kind of configuration of relay sub-frame and the method and system of indicating means and realization relay transmission.
Background technology
At present, the demand for development of mobile communication can support higher transmission rate, more perfect signal to cover and higher resource utilization.For realizing higher transmission rate, next generation mobile communication system will adopt higher frequency bandwidth transmission signals, and higher frequency bandwidth will be brought bigger path loss simultaneously, influence the network coverage.Relaying (Relay) technology can increase covering and balance and increase cell throughout, and, relay station has less relatively deployment cost than the base station, therefore, relaying is regarded as Long Term Evolution (Long Term Evolution, abbreviate LTE as) evolution system a---key technology in senior Long Term Evolution (LTE-Advanced, the be called for short LTE-A) system.
In time division duplex (Time Division Dual abbreviates TDD as) LTE system, uplink downlink is shared identical frequency resource, and frequency resource is that unit divides in time with the frame.Fig. 1 is the schematic diagram according to the TDD system frame structure of correlation technique.As shown in Figure 1, the length of each radio frames is 10 milliseconds, and to comprise 10 length be 1 millisecond subframe, and wherein, subframe comprises sub-frame of uplink, descending sub frame and special subframe.According to the ratio difference of last/descending sub frame quantity, have 7 kinds of subframe uplink-downlink configuration in the TDD LTE system, system can according in the sub-district/descending information such as traffic carrying capacity carry out flexible configuration.7 kinds of concrete subframe uplink-downlink configuration structures are as shown in table 1, and wherein D represents descending sub frame, and U represents sub-frame of uplink, and S represents special subframe.
Subframe uplink-downlink configuration form in the table 1 TDD LTE system
Figure GSA00000088334300011
Fig. 2 is the schematic diagram according to the TDD system special subframe structure of correlation technique; as shown in Figure 2; the S subframe comprises a part of descending symbol (Downlink Pilot Time Slot; abbreviate DwPTS as), up symbol (Uplink Pilot Time Slot; abbreviate UpPTS as) and on/descending between the protection at interval (Guard Period abbreviates GP as) of conversion.As the evolution system of the TDD LTE that guarantees backwards compatibility, TDD LTE-A system can keep the frame structure identical with TDD LTE.
In TDD LTE system, satisfy the certain time sequence relation between professional transmission and the corresponding ACK/NACK transmission of feedback information.For example for downlink business and the transmission of uplink ACK/NACK feedback information accordingly, at the n-k descending sub frame, the base station sends downlink business, at the n sub-frame of uplink, subscriber equipment (User Equipment, abbreviate UE as, be also referred to as terminal) confirm accordingly/non-affirmation (Acknowledge/Negative Acknowledge abbreviates ACK/NACK as) information to base station feedback according to the data that receive.Wherein, k different and different, specifically as shown in table 2 according to TDD system subframe uplink-downlink configuration and subframe position.
The uplink ACK of downlink business in the table 2 TDD LTE system/NACK feedback transmission is k value table regularly
Figure GSA00000088334300022
Figure GSA00000088334300031
In like manner, also defined corresponding transmission time sequence relation between the uplink service of LTE system and the corresponding downstream ACK/NACK feedback information.At the n-k sub-frame of uplink, subscriber equipment sends uplink service to the base station, and at the n descending sub frame, the base station is fed back corresponding ACK/NACK information according to the data that receive to subscriber equipment, and the definition of k value is as shown in table 3.
The descending ACK/NACK feedback transmission timing k value table of uplink service in the table 3 TDD LTE system
Figure GSA00000088334300032
In TDD LTE system, between uplink authorization (UL grant) message transmission and the corresponding uplink traffic transmission strict sequential relationship is arranged equally.At n work song frame, base station down transmission uplink authorization information, at n+k work song frame, terminal is according to the corresponding uplink service of uplink authorization message transmission.The uplink authorization information that defines among the Rel-8 and the transmission time sequence k of uplink service are as shown in table 4.
Uplink authorization information and uplink traffic transmission timing k value table in the table 4 TDD LTE system
Figure GSA00000088334300033
Figure GSA00000088334300041
Introduce after the relay station, be equivalent to the transmission of data many a jumping.With the double bounce transmission system is example, the communication pattern of base station-terminal has originally become the communication pattern of base station-relay station-terminal, wherein base station-relay station link is called as repeated link or back haul link (backhaul link), interface between relevant base station-relay station is called the Un interface, relay station-terminal links is called as access link (access link), interface between corresponding relay station-terminal is called as the Uu interface, and base station-terminal links is called as the link that direct transfers (direct link).In multihop system, a part of terminal is linked under the relay station, finishes communication service by relay station.
The LTE-A system introduces after the relay station; need the backwards compatibility of assurance for terminal; the terminal of version is (such as LTE Release-8 before promptly guaranteeing; be called for short Rel-8) also can be linked under the relay station; at this time just need mark off a part of resource to guarantee the communication between base station and the relay station not influencing under relay station and the prerequisite that subordinate terminal is communicated by letter.At present the LTE-A system determines that base station-relay station communication and relay station-terminal communication carry out with time division way.Concrete, in the uplink and downlink subframe, to divide a part of subframe respectively and be used for the repeated link transfer of data, these repeated link uplink and downlink transfer of data subframes are called as relaying (relay, or backhaul) subframe, perhaps are called the Un subframe.Rel-8 terminal for the relay station subordinate, descending backhaul subframe is indicated as Multicast Broadcast Single Frequency Network (Multicast BroadcastSingle Frequency Network, be called for short MBSFN) subframe, thereby the Rel-8 terminal can be skipped these subframes, when finishing base station-relay station communication, guaranteed backwards compatibility for the Rel-8 terminal.For up backhaul subframe, can avoid terminal to carry out uplink traffic transmission by terminal is not dispatched, thereby finish the communication of relay station-base station in these subframes.
On the other hand, in TDD LTE agreement, strict corresponding relationship is arranged, the definition that the business transmission that the compatibility of Rel-8 terminal is meaned the relay station subordinate terminal and the transmission time sequence of ACK/NACK feedback information must guarantee to continue to use the Rel-8 agreement for professional transmission time sequence with corresponding ACK/NACK feedback information.Because descending backhaul subframe adopts the structure of MBSFN subframe, so relay station can be on the running time-frequency resource of the control domain of MBSFN subframe sends information such as descending ACK/NACK feedback, uplink authorization to subordinate terminal.But because the structure of up backhaul subframe itself, relay station is in emission state in up backhaul subframe, can't receive uplink ACK/NACK feedback information that subordinate terminal sends, so the transmission time sequence of downlink business and corresponding uplink ACK/NACK feedback information is to backhaul sub-frame configuration important influence.In addition, the descending sub frame of regulation except that subframe 0,1,5,6 can be configured to the MBSFN subframe in the TDD system, and sub-frame of uplink own is less under some subframe uplink-downlink configuration, is difficult to therefore guarantee that the configuration of up backhaul subframe does not impact the transmission of access link downlink business and corresponding uplink ACK/NACK feedback information.The problems referred to above cause the backhaul sub-frame configuration in the TDD system more complicated.
In sum, TDD LTE-A system or other system are introduced after the relay station, how when carrying out the backhaul sub-frame configuration, not only guaranteed to implement simply, but also can guarantee that signaling consumption remains on a zone of reasonableness, become a major issue in the TDD LTE-A system.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of collocation method, configuration and indicating means of relay sub-frame, and the method and system that realize relay transmission, be used for TDD system such as LTE-A system, in system, introduce after the relay station, guarantee backwards compatibility for terminal.
In order to address the above problem, the invention provides first kind of relay sub-frame configuration method, be used to comprise time division duplex (TDD) system of at least one base station and relay station, comprising:
At used subframe uplink-downlink configuration, be configured to carry out between base station and the relay station one or more relay sub-frame configuration set of uplink and downlink communication, to each descending sub frame in the described relay sub-frame configuration set, in same relay sub-frame configuration set, all there are a sub-frame of uplink and this descending sub frame to constitute subframe combination, and this subframe combination is under this subframe uplink-downlink configuration that defines among the TDD LTE Release-8, is used for downlink traffic transmission and one of the corresponding uplink ACK/sub-frame of uplink of NACK transmission of feedback information and combination of descending sub frame.
Further,
Described subframe combination in the described relay sub-frame configuration set still is under this subframe uplink-downlink configuration that defines among the TDD LTE Release-8, be used for uplink traffic transmission and one of the sub-frame of uplink of corresponding downstream ACK/NACK transmission of feedback information and combination of descending sub frame, and/or be used for uplink authorization message transmission and one of the sub-frame of uplink of corresponding uplink traffic transmission and combination of descending sub frame.
Further,
Described relay sub-frame configuration set is only at the subframe uplink-downlink configuration structure that comprises at least 2 sub-frame of uplink in the radio frames, subframe in the described relay sub-frame configuration set is subframe set { 2,3,4,7,8, the subclass of 9}, the subframe numbers of subframe in radio frames that comprises in the numeral relay sub-frame configuration set in " { } ";
At described subframe uplink-downlink configuration, when the set of described relay sub-frame configuration has when a plurality of, there is not identical subframe between the different relay sub-frame configuration set, perhaps having a relay sub-frame configuration set at least is the subclass of another relay sub-frame configuration set.
Further,
Described used subframe uplink-downlink configuration comprises subframe uplink-downlink configuration 1, and the set of the relay sub-frame configuration of relative configurations is in the following subframe set one or more: 4,8}, 3,9} and 3,4,8,9}.
Further,
Described used subframe uplink-downlink configuration comprises subframe uplink-downlink configuration 2, and the relay sub-frame configuration set of relative configurations is one or more in the following subframe set: { 3,7,9} and { 3,7} perhaps be during following subframe is gathered one or more: { 2,4,8} and 2,8}.
Further,
Described used subframe uplink-downlink configuration comprises subframe uplink-downlink configuration 3, and the set of the relay sub-frame configuration of relative configurations is in the following subframe set one or more: 3,7}, 3,8}, 3,7,8}, 4,9} and 3,4,7,8,9}.
Further,
Described used subframe uplink-downlink configuration comprises subframe uplink-downlink configuration 4, and the set of the relay sub-frame configuration of structure is in the following subframe set one or more: 3,9}, 3,8,9}, 3,7,9} and 3,7,8,9}.
Further,
Described used subframe uplink-downlink configuration comprises subframe uplink-downlink configuration 6, the set of the relay sub-frame configuration of relative configurations for 4,9}.
Further,
Described used subframe uplink-downlink configuration comprises subframe uplink-downlink configuration 0, the relay sub-frame configuration set of relative configurations is one or more in the following subframe set: { 1,7}, { 2,6} and { 1,2,6,7}, the wherein subframe numbers of subframe in radio frames that comprises in the set of the numeral relay sub-frame configuration in " { } ".
Further,
With the structure described relay sub-frame configuration set configuration on the base station, when the configuration relay sub-frame, the some or all of relay sub-frame configuration set corresponding with current subframe uplink-downlink configuration of configuration taken out in the base station, is the relay sub-frame that is used for the repeated link transmission under the current subframe uplink-downlink configuration with the sub-frame configuration in the described some or all of relay sub-frame configuration set.
In order to address the above problem, the present invention provides the configuration and the indicating means of first kind of relay sub-frame again, is used to comprise time division duplex (TDD) system of at least one base station and relay station, comprising:
According to above-mentioned first kind of relay sub-frame configuration method, the base station is defined as the subframe in the described some or all of relay sub-frame configuration set to be used under the current subframe uplink-downlink configuration relay sub-frame of repeated link transmission;
The base station sends indication signaling to relay station, indicates described some or all of relay sub-frame configuration set to relay station; Relay station is known described some or all of relay sub-frame configuration set according to described indication signaling, the subframe in the described some or all of relay sub-frame configuration set is defined as being used for the relay sub-frame of repeated link transmission.
Further
The index of different binary sequences as different relay sub-frame configuration set groups used in described base station, by to described relay station transmission and the corresponding binary sequence of relay sub-frame configuration set group that described part or all of relay sub-frame configuration set constitutes, indicate the described part or all of relay sub-frame configuration set of taking-up.
Further
The number of the uplink and downlink relay sub-frame of needs is determined according to traffic carrying capacity in described base station, and the number of the subframe in the described part or all of relay sub-frame configuration set of taking-up satisfies this number requirement.
Further
The length of described binary sequence is identical under different subframe uplink-downlink configuration, for
Figure GSA00000088334300081
N wherein Max Subframe-setThe maximum of representing the number of relay sub-frame configuration set under each subframe uplink-downlink configuration,
Figure GSA00000088334300082
Expression rounds up; Perhaps, the length of described binary sequence is identical under different subframe uplink-downlink configuration, for N wherein Max Subframe-setThe maximum of representing the number of relay sub-frame configuration set under each subframe uplink-downlink configuration,
Figure GSA00000088334300084
Expression rounds up; Perhaps
The length of described binary sequence is
Figure GSA00000088334300085
Wherein i is the sequence number of subframe uplink-downlink configuration, N i Subframe-setBe illustrated in the number of relay sub-frame configuration set under the subframe uplink-downlink configuration i,
Figure GSA00000088334300086
Expression rounds up, i more than or equal to 0 smaller or equal to 6; Perhaps, the length of described binary sequence is Wherein i is the sequence number of subframe uplink-downlink configuration, N i Subframe-setBe illustrated in the number of relay sub-frame configuration set under the subframe uplink-downlink configuration i, Expression rounds up, i more than or equal to 0 smaller or equal to 6.
In order to solve the problems of the technologies described above, the present invention provides second kind of relay sub-frame configuration method again, is used to comprise time division duplex (TDD) system of at least one base station and relay station, comprising:
At current subframe uplink-downlink configuration, base station configuration and/or relay station are known the downlink relay sub-frame that is used for downlink communication between base station and the relay station of configuration;
Base station and/or relay station are to each downlink relay sub-frame, find with this downlink relay sub-frame and constitute a sub-frame of uplink of the subframe combination that defines and this sub-frame of uplink is defined as the corresponding uplink relay subframe of this downlink relay sub-frame, the subframe combination of this definition is meant under the described subframe uplink-downlink configuration that defines among the TDD LTE Release-8, is used for downlink traffic transmission and the corresponding uplink ACK/sub-frame of uplink of NACK transmission of feedback information and combination of descending sub frame.
Further, described base station and/or relay station are determined uplink relay subframe in the following manner to each downlink relay sub-frame:
Base station and/or relay station are to the downlink relay sub-frame of subframe n-k, the sub-frame of uplink of subframe n is defined as corresponding uplink relay subframe, the uplink ACK of the downlink traffic transmission on the downlink relay sub-frame of subframe n-k/NACK feedback information transmits on the uplink relay subframe of subframe n, and the value of k makes this transmission time sequence meet the downlink business of TDD LTE Release-8 definition and the transmission time sequence of corresponding uplink ACK/NACK feedback information; Perhaps
Base station and/or relay station are to the downlink relay sub-frame of subframe n, the sub-frame of uplink of subframe n+k ' is defined as corresponding uplink relay subframe, the uplink ACK of the downlink traffic transmission on the downlink relay sub-frame of subframe n/NACK feedback information transmits on the uplink relay subframe of subframe n+k ', and the value of k makes this transmission time sequence meet the downlink business of TDD LTE Release-8 definition and the transmission time sequence of corresponding uplink ACK/NACK feedback information.
Further,
Described base station and/or relay station dispose the sequential relationship and the list of values of downlink relay sub-frame and uplink relay subframe, when the descending sub frame of subframe n is configured to downlink relay sub-frame, by searching this sequential relationship and list of values, the sub-frame of uplink of subframe n+1 is defined as corresponding uplink relay subframe, and sequential and value at following subframe uplink-downlink configuration in this sequential relationship and the list of values are as follows:
Subframe uplink-downlink configuration 1, the one or more downlink relay sub-frame that are configured in the subframe 4,9,1 corresponding value is 4,4;
Subframe uplink-downlink configuration 2, the one or more downlink relay sub-frame that are configured in the subframe 3,4,8,9,1 corresponding value is followed successively by 4,8,4,8;
Subframe uplink-downlink configuration 3, the one or more downlink relay sub-frame that are configured in the subframe 7,8,9,1 corresponding value is followed successively by 6,5,5;
Subframe uplink-downlink configuration 4, the one or more downlink relay sub-frame that are configured in the subframe 4,7,8,9,1 corresponding value is followed successively by 8,6,5,4;
Subframe uplink-downlink configuration 6, subframe 9 can be configured to downlink relay sub-frame, and 1 corresponding value is 5.
Further, described current subframe uplink-downlink configuration is one or more in the following subframe uplink-downlink configuration, and the downlink relay sub-frame and the uplink relay subframe of corresponding configuration are as follows:
Subframe uplink-downlink configuration 1, subframe 4 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 8; Perhaps, subframe 9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 3; Subframe 4,9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 8,3;
Subframe uplink-downlink configuration 2, subframe 3 and/or 9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 7; Perhaps, subframe 4 and/or 8 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 2;
Subframe uplink-downlink configuration 3, subframe 7 and/or 8 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 3; Perhaps, subframe 9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 4; Perhaps, at least one subframe and subframe 9 in the subframe 7,8 are configured to downlink relay sub-frame, and corresponding uplink relay subframe is subframe 3 and 4;
Subframe uplink-downlink configuration 4, at least one in the subframe 7,8,9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 3; Perhaps, subframe 4 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 2;
Subframe uplink-downlink configuration 6, subframe 9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 4.
In order to solve the problems of the technologies described above, the present invention also provides the configuration and the indicating means of second kind of relay sub-frame, is used to comprise time division duplex (TDD) system of at least one base station and relay station, comprising:
The base station sends indication signaling to relay station, the downlink relay sub-frame that is used for downlink communication between base station and the relay station of indication configuration;
Relay station is known the described downlink relay sub-frame of configuration from described indication signaling, determine corresponding uplink relay subframe by above-mentioned second kind of relay sub-frame configuration method again.
Further,
Described base station is by the downlink relay sub-frame of the bitmap in the indication signaling to relay station indication configuration;
The length of this bitmap is 5 or 6 bits, and 5 subframes 3,4,7,8 and 9 that correspond respectively in the radio frames wherein are used to indicate the position of the downlink relay sub-frame in 1 radio frames; Perhaps
The length of this bitmap is 20 or 24 bits, comprises 45 bits or 6 bits, and 5 subframes 3,4,7,8 and 9 that correspond respectively in the radio frames in each 5 bit or 6 bits are used to indicate the position of the downlink relay sub-frame in 4 radio frames.
Further,
Described base station is used for the uplink relay subframe and the downlink relay sub-frame of repeated link transmission according to the described relay sub-frame configuration method configuration of claim 10.
Further,
It is downlink relay sub-frame that one or more sub-frame configuration are selected at current subframe uplink-downlink configuration in described base station, determines corresponding uplink relay subframe according to above-mentioned second kind of relay sub-frame configuration method again; Wherein:
To subframe uplink-downlink configuration 1, with the one or more downlink relay sub-frame that are configured in the subframe 4,9;
To subframe uplink-downlink configuration 2, with the one or more downlink relay sub-frame that are configured in the subframe 3,4,8,9;
To subframe uplink-downlink configuration 3, with the one or more downlink relay sub-frame that are configured in the subframe 7,8,9;
To subframe uplink-downlink configuration 4, with the one or more downlink relay sub-frame that are configured in the subframe 4,7,8,9;
To subframe uplink-downlink configuration 6, subframe 9 is configured to downlink relay sub-frame.
In order to solve the problems of the technologies described above, the present invention also provides a kind of method that realizes relay transmission, is used to comprise time division duplex (TDD) system of at least one base station and relay station, comprising:
The base station is determined to be used under the current subframe uplink-downlink configuration relay sub-frame group that the relay sub-frame of repeated link transmission constitutes and is notified relay station, to each descending sub frame in this relay sub-frame group, all there are a sub-frame of uplink and this descending sub frame to constitute under this subframe uplink-downlink configuration that defines among the TDD LTE Release-8 in this relay sub-frame group, are used for downlink traffic transmission and the corresponding uplink ACK/sub-frame of uplink of NACK transmission of feedback information and combination of descending sub frame;
When using described relay sub-frame group to carry out uplink and downlink communication between described base station and the relay station, carry out the transmission of downlink business and corresponding uplink ACK/NACK feedback information according to the transmission time sequence of the downlink business that defines among the TDD LTE Release-8 and corresponding uplink ACK/NACK feedback information.
Further,
To each sub-frame of uplink in this relay sub-frame group, be used for uplink traffic transmission and the sub-frame of uplink of corresponding downstream ACK/NACK transmission of feedback information and the combination of descending sub frame under this subframe uplink-downlink configuration that defines among the TDD LTE Release-8 as existing descending sub frame and this sub-frame of uplink to constitute in this relay sub-frame group, the uplink service that defines among the use TDD LTE Release-8 between then described base station and the relay station and the transmission time sequence of corresponding descending ACK/NACK feedback information carry out the transmission of uplink service and corresponding descending ACK/NACK feedback information; Otherwise, definition one descending subframe in this relay sub-frame group, be used for this sub-frame of uplink on uplink traffic transmission corresponding downstream ACK/NACK transmission of feedback information, described base station and relay station use the uplink service of this redetermination and the transmission time sequence of corresponding descending ACK/NACK feedback information to carry out the transmission of uplink service and corresponding descending ACK/NACK feedback information.
Further,
To each sub-frame of uplink in this relay sub-frame group, exist descending sub frame and this sub-frame of uplink to constitute as described in the relay sub-frame group and be used for uplink authorization message transmission and the sub-frame of uplink of corresponding uplink traffic transmission and the combination of descending sub frame under the described subframe uplink-downlink configuration that defines among the TDD LTE Release-8, the uplink authorization information that defines among the use TDD LTE Release-8 between then described base station and the relay station and the transmission time sequence of corresponding uplink service carry out the transmission of uplink authorization information and corresponding uplink service; Otherwise, definition one descending subframe in this relay sub-frame group, be used for this sub-frame of uplink on the corresponding uplink authorization message transmission of uplink traffic transmission, base station and relay station use the uplink authorization information of this redetermination and the transmission time sequence of corresponding uplink service to carry out the transmission of uplink authorization information and corresponding uplink service.
Further,
Described relay station is indicated the terminal to Rel-8 with the descending sub frame in the described relay sub-frame as Multicast Broadcast Single Frequency Network (MBSFN) subframe, when described relay station needs to send the descending ACK/NACK feedback information of uplink authorization information and/or uplink service on described descending sub frame, send the descending ACK/NACK feedback information of described uplink authorization information and/or uplink service in corresponding to the MBSFN subframe on the running time-frequency resource of control domain at described descending sub frame.
Further,
Base station and relay station can determine to be used under the current subframe uplink-downlink configuration relay sub-frame of repeated link transmission according to above-mentioned first kind or second kind of relay sub-frame configuration and indicating means.
In order to solve the problems of the technologies described above, the invention provides a kind of time division duplex (TDD) system, comprise at least one base station and relay station, it is characterized in that, wherein:
Described base station comprises:
The first relay sub-frame determination module, be used for determining being used under the current subframe uplink-downlink configuration relay sub-frame group that the relay sub-frame of repeated link transmission constitutes, to each descending sub frame in this relay sub-frame group, all there are a sub-frame of uplink and this descending sub frame to constitute under this subframe uplink-downlink configuration that defines among the TDD LTE Release-8 in this relay sub-frame group, are used for downlink traffic transmission and the corresponding uplink ACK/sub-frame of uplink of NACK transmission of feedback information and combination of descending sub frame;
Indicating module is used to send indication signaling, and the information of definite relay sub-frame is indicated to relay station;
First communication module is used to use and carries out uplink and downlink between relay sub-frame and the relay station and communicate by letter;
Described relay station comprises:
The second relay sub-frame determination module is used for being identified for the relay sub-frame that repeated link transmits according to described indication signaling;
Second communication module is used to use and carries out uplink and downlink between relay sub-frame and the base station and communicate by letter;
Described first communication module and second communication module carry out the transmission of downlink business and corresponding uplink ACK/NACK feedback information according to the transmission time sequence of the downlink business that defines among the TDD LTE Release-8 and corresponding uplink ACK/NACK feedback information.
Further,
The described first relay sub-frame determination module is finished the configuration of the uplink and downlink relay sub-frame that is used for the repeated link transmission on the base station according to above-mentioned first kind or second kind of relay sub-frame configuration method.
Further,
Described indicating module is indicated described part or all of relay sub-frame configuration set according to the indicating means of above-mentioned first kind of relay sub-frame configuration to relay station; The described second relay sub-frame determination module is known described part or all of relay sub-frame configuration set according to described indication signaling, subframe wherein is defined as being used for the relay sub-frame of repeated link transmission; Perhaps
Described indicating module is indicated the information of the downlink relay sub-frame of configuration to relay station according to the indicating means of above-mentioned second kind of relay sub-frame configuration; Described second relay sub-frame is determined the downlink relay sub-frame of configuration according to indication, and determines corresponding uplink relay subframe according to above-mentioned second kind of relay sub-frame configuration method.
Further,
Carry out the transmission of uplink service and corresponding descending ACK/NACK feedback information between described first communication module and the second communication module according to the method for above-mentioned realization relay transmission, and the transmission of uplink authorization information and corresponding uplink service.
The collocation method of above-mentioned relay sub-frame, configuration and indicating means, and the method and system that realize relay transmission are introduced after the relay station in system, can guarantee the backwards compatibility for the Rel_8 terminal.
Description of drawings
Fig. 1 is a LTE system wireless frame structure schematic diagram;
Fig. 2 is a TDD LTE system special subframe structural representation;
Fig. 3 is the flow chart of embodiment two.
Embodiment
The present invention is directed to subframe uplink-downlink configuration different in the TDD LTE system, carry out the configuration of relay sub-frame (backhaul subframe or Un subframe) according to the transmission time sequence of downlink business and corresponding uplink ACK/NACK feedback information, what define in the transmission time sequence of the downlink business between the backhaul subframe that is disposed and corresponding uplink ACK/NACK feedback information and the TDD LTE Release-8 agreement is regular identical.Under this equipping rules, if the uplink service between the backhaul subframe that is disposed and the transmission time sequence of corresponding descending ACK/NACK feedback information can't be finished according to the rule that defines in the Rel-8 agreement, between the backhaul subframe, define the new uplink service and the transmission time sequence of corresponding descending ACK/NACK feedback information so; If the uplink authorization information between the backhaul subframe that is disposed and the transmission time sequence of corresponding uplink service can't be finished according to the rule of Rel-8 protocol definition, between the backhaul subframe, define the transmission time sequence of new uplink authorization information and corresponding uplink service so.
Embodiment one: the set of structure backhaul sub-frame configuration
This programme is at subframe uplink-downlink configuration different in the TDD system, construct the set of backhaul sub-frame configuration respectively, it is regular identical that the downlink business that transmits on the backhaul subframe in the set of backhaul sub-frame configuration and the transmission time sequence of corresponding uplink ACK/NACK feedback information and Rel-8 defines.Because in up backhaul subframe, relay station can't receive any uplink of subordinate terminal.Such backhaul sub-frame configuration is all smaller for the influence of backhaul and access link transmission of feedback information sequential.
Wherein, the building method of backhaul sub-frame configuration set is as follows: at used subframe uplink-downlink configuration, be configured to carry out between base station and the relay station one or more relay sub-frame configuration set of uplink and downlink communication, to each descending sub frame in the described relay sub-frame configuration set, in same relay sub-frame configuration set, all there are a sub-frame of uplink and this descending sub frame to constitute subframe combination, and this subframe combination is under this subframe uplink-downlink configuration that defines among the TDD LTE Release-8, is used for downlink traffic transmission and one of the corresponding uplink ACK/sub-frame of uplink of NACK transmission of feedback information and combination of descending sub frame.。
Further, described subframe combination in the described relay sub-frame configuration set can also be under this subframe uplink-downlink configuration that defines among the TDD LTERelease-8, be used for uplink traffic transmission and one of the sub-frame of uplink of corresponding downstream ACK/NACK transmission of feedback information and combination of descending sub frame, and/or be used for uplink authorization message transmission and one of the sub-frame of uplink of corresponding uplink traffic transmission and combination of descending sub frame.
Described relay sub-frame configuration set can only be constructed at the subframe uplink-downlink configuration that comprises 2 sub-frame of uplink in the radio frames at least, but is not limited to this.
Subframe in the set of described relay sub-frame configuration can be defined as the subframe set 2,3,4,7,8, the subclass of 9}, each downlink relay sub-frame can be indicated as the MBSFN subframe.The subframe numbers of the subframe that comprises in the numeral relay sub-frame configuration set in " { } ".
With the structure described relay sub-frame configuration set configuration on the base station, when needs configuration relay sub-frame, the some or all of relay sub-frame configuration set corresponding with current subframe uplink-downlink configuration of configuration taken out in the base station, is the relay sub-frame that is used for the repeated link transmission under the described subframe uplink-downlink configuration with the sub-frame configuration in the described some or all of relay sub-frame configuration set.
The base station can be indicated described some or all of relay sub-frame to relay station by indication signaling, and concrete grammar illustrates hereinafter.
When using relay sub-frame to carry out uplink and downlink communication between base station and the relay station, carry out the transmission of downlink business and corresponding uplink ACK/NACK feedback information according to the transmission time sequence of the downlink business that defines among the TDD LTERelease-8 and corresponding uplink ACK/NACK feedback information.
To each sub-frame of uplink in the relay sub-frame, be used for uplink traffic transmission and one of the sub-frame of uplink of corresponding downstream ACK/NACK transmission of feedback information and combination of descending sub frame as existing descending sub frame and this sub-frame of uplink to constitute under the subframe uplink-downlink configuration that defines among the TDD LTE Release-8 in the relay sub-frame, then the uplink service that defines among the use TDD LTE Release-8 between base station and the relay station and the transmission time sequence of corresponding descending ACK/NACK feedback information carry out the transmission of uplink service and corresponding descending ACK/NACK feedback information; Otherwise, definition one descending subframe in relay sub-frame, be used for this sub-frame of uplink on uplink traffic transmission corresponding downstream ACK/NACK transmission of feedback information, base station and relay station use the uplink service of this redetermination and the transmission time sequence of corresponding descending ACK/NACK feedback information to carry out the transmission of uplink service and corresponding descending ACK/NACK feedback information.
To each sub-frame of uplink in the relay sub-frame, be used for uplink authorization message transmission and one of the sub-frame of uplink of corresponding uplink traffic transmission and combination of descending sub frame under the subframe uplink-downlink configuration that defines among the TDD LTE Release-8 as existing descending sub frame and this sub-frame of uplink to constitute in the relay sub-frame, then the uplink authorization information that defines among the use TDD LTE Release-8 between base station and the relay station and the transmission time sequence of corresponding uplink service carry out the transmission of uplink authorization information and corresponding uplink service; Otherwise, definition one descending subframe in relay sub-frame, be used for this sub-frame of uplink on the corresponding uplink authorization message transmission of uplink traffic transmission, base station and relay station use the uplink authorization information of this redetermination and the transmission time sequence of corresponding uplink service to carry out the transmission of uplink authorization information and corresponding uplink service.
Relay station is indicated the terminal to Rel-8 with the descending sub frame in the relay sub-frame as Multicast Broadcast Single Frequency Network (MBSFN) subframe, when relay station needs to send the descending ACK/NACK feedback information of uplink authorization information and/or uplink service on descending sub frame, send the descending ACK/NACK feedback information of uplink authorization information and/or uplink service in corresponding to the MBSFN subframe on the running time-frequency resource of control domain at descending sub frame.Embodiment two also can herewith handle.
Specify below in conjunction with each the subframe uplink-downlink configuration in the table 1.
Subframe uplink-downlink configuration 0:
Under this subframe uplink-downlink configuration, except subframe 0,1,5, outside the 6}, do not have descending sub frame can be used for descending backhaul transmission.Therefore under this subframe uplink-downlink configuration, two options can be arranged: do not support relay transmission, perhaps in special subframe (S subframe), carry out descending backhaul transmission.
Suppose to be supported in and carry out descending backhaul transmission in the S subframe.For S subframe 1, the uplink ACK of downlink business/NACK feedback information is in subframe 7 transmission, and the descending ACK/NACK feedback information of the uplink service on the subframe 7 is in subframe 1 transmission, and the uplink authorization information of subframe 7 sends in subframe 1.With { 1,7} is configured to the backhaul subframe, and terminal does not have the uplink feedback information of downlink business to transmit on subframe 7, can not influence business transmission and the ACK/NACK transmission of feedback information of terminal on other subframes.Equally, also has such transmission time sequence relation between S subframe 6 and the sub-frame of uplink 2.
Concrete, can construct the set of backhaul sub-frame configuration in the following way:
Mode 1, according to the above-mentioned business transmission and the transmission time sequence relation of ACK/NACK feedback information, two backhaul sub-frame configuration set of structure under this subframe uplink-downlink configuration: the set of backhaul sub-frame configuration 1,7} and the set of backhaul sub-frame configuration 2,6}.Subframe in these two configuration sets is not occured simultaneously.It is regular identical that business transmission in two configuration sets and the transmission time sequence of corresponding ACK/NACK feedback information and Rel-8 define.
1,7}, 2, and 6} be define among the TDD LTE Release-8 be used for downlink traffic transmission and the corresponding uplink ACK/sub-frame of uplink of NACK transmission of feedback information and combination of descending sub frame.
Mode 2 can also be constructed the set of backhaul sub-frame configuration by another mode, when the backhaul sub-frame configuration is gathered greater than 1, is the relation of subclass between the different backhaul sub-frame configuration set promptly.For this subframe uplink-downlink configuration, can be constructed as follows the set of two backhaul sub-frame configuration: first backhaul sub-frame configuration set be 1,7} or 2,6}, second backhaul sub-frame configuration set be 1,2,6,7}.What equally, the transmission time sequence of the transmission of the business in two subframe configuration sets and feedback information and Rel-8 defined is regular identical.
Perhaps, also can under this subframe uplink-downlink configuration, construct the set of 3 backhaul sub-frame configuration: 1,7}, 2,6} and 1,2,6,7}.
Subframe uplink-downlink configuration 1:
Subframe 4 and subframe 9 can be configured to descending backhaul subframe under this subframe uplink-downlink configuration.For subframe 4, the corresponding uplink ACK of downlink business/NACK feedback information is in sub-frame of uplink 8 transmission, and the uplink authorization information of sub-frame of uplink 8 is in subframe 4 transmission, and the uplink service corresponding downstream ACK/NACK feedback information of sub-frame of uplink 8 is in subframe 4 transmission.Equally, also has such relation between the subframe 3 and 9.4,8}, 3, and 9} be define among the TDD LTE Release-8 be used for downlink traffic transmission and the corresponding uplink ACK/sub-frame of uplink of NACK transmission of feedback information and combination of descending sub frame.Below each subframe uplink-downlink configuration explanation no longer one by one.
Concrete, can construct the set of backhaul sub-frame configuration in the following way:
Mode 1, according to the above-mentioned business transmission and the transmission time sequence of ACK/NACK feedback information, two backhaul sub-frame configuration set of structure under this subframe uplink-downlink configuration: the set of backhaul sub-frame configuration 4,8} and the set of backhaul sub-frame configuration 3,9}.Subframe in these two configuration sets is not occured simultaneously.It is regular identical that business transmission in two subframe configuration sets and the transmission time sequence of ACK/NACK feedback information and Rel-8 define.
Mode 2 can be constructed the set of backhaul sub-frame configuration by another mode, when the backhaul sub-frame configuration is gathered greater than 1, is the relation of subclass between the different backhaul sub-frame configuration set promptly.For this subframe uplink-downlink configuration, can be constructed as follows the set of two backhaul sub-frame configuration: first configuration set be 4,8} or 3,9}, second configuration set be 3,4,8,9}.What equally, the transmission time sequence of the transmission of the business in two subframe configuration sets and ACK/NACK feedback information and Rel-8 defined is regular identical.
Perhaps, also can be in 3 the backhaul sub-frame configuration set of giving a definition of this subframe uplink-downlink configuration: 4,8}, 3,9} and 3,4,8,9}.
Subframe uplink-downlink configuration 2:
Subframe 3,4,8 and 9 can be configured to descending backhaul subframe under this subframe uplink-downlink configuration, and subframe 2 and 7 can be configured to up backhaul subframe.Wherein, the corresponding uplink ACK of subframe 3,9 downlink business/NACK feedback information is in subframe 7 transmission, and the corresponding uplink ACK of subframe 4,8 downlink business/NACK feedback information is in subframe 2 transmission.Because need to guarantee that the access link has the uplink subframe, therefore backhaul uplink if desired can only have one to be configured to up backhaul subframe in the sub-frame of uplink 2 and 7.Concrete, can construct the set of backhaul sub-frame configuration in the following way:
Mode 1, if subframe 7 is configured to up backhaul subframe, owing in the subframe 7 the corresponding uplink ACK of subframe 3,9 downlink business/NACK feedback information is arranged, 3 and 9 be configured to descending backhaul subframe simultaneously so, therefore under this subframe uplink-downlink configuration, can define a backhaul sub-frame configuration set { 3,7,9}.In like manner, if subframe 2 is configured to up backhaul subframe, subframe 4 and 8 is configured to descending backhaul subframe simultaneously, can define another one backhaul sub-frame configuration set 2,4,8}.Do not occur simultaneously between these two backhaul sub-frame configuration set.In this two backhaul sub-frame configuration set, it is regular identical that the transmission time sequence of uplink service and transmission time sequence, uplink authorization information and the corresponding uplink service of corresponding downstream ACK/NACK feedback and Rel-8 define.
Under this subframe uplink-downlink configuration, owing to need sub-frame of uplink to be used for the access uplink, preferred, the backhaul sub-frame configuration set that contains subframe 7 and 2 can not be configured to up backhaul subframe simultaneously.Therefore, the backhaul sub-frame configuration of structure set can only comprise 3,7,9} or 2,4, among the 8} one.
Mode 2 can also adopt backhaul sub-frame configuration more flexibly.For example, on the basis of scheme 1, for backhaul sub-frame configuration set { 3,7,9} is when less or other reasons causes the backhaul link to need not so many descending sub frame when the backhaul traffic carrying capacity, can further increase the set of backhaul sub-frame configuration 3,7}.In like manner, for backhaul sub-frame configuration set 2,4,8}, can further increase backhaul sub-frame configuration set of definition 2,8}.In these two backhaul sub-frame configuration set that increase, the transmission time sequence of uplink service and transmission time sequence, uplink authorization information and the corresponding uplink service of corresponding downstream ACK/NACK feedback all with Rel-8 define regular identical.
Preferably, the backhaul sub-frame configuration set that contains subframe 7 and 2 can not be configured to up backhaul subframe simultaneously.Therefore, the backhaul sub-frame configuration of constructing under this mode set include only 3,7,9} and 3,7}, perhaps include only 2,4,8} and 2,8}.
Subframe uplink-downlink configuration 3:
Under this subframe uplink-downlink configuration, subframe 7,8,9 can be configured to descending backhaul subframe, subframe 2,3, and 4 can be configured to up backhaul subframe.Owing to need to guarantee the uplink of access link, so subframe 2,3,4 can not be configured to the backhaul sub-frame of uplink simultaneously.For the subframe that can be configured to descending backhaul transmission, the uplink ACK of the downlink traffic transmission of subframe 7,8/NACK feedback information is in subframe 3 transmission, and the uplink ACK of the downlink traffic transmission of subframe 9/NACK feedback information is in subframe 4 transmission.Need in the subframe 2 downlink transfer of subframe 1,5,6 is carried out up feedback, and subframe 1,5,6 can not be configured to descending backhaul subframe, so subframe 2 is not configured to up backhaul subframe.Concrete, can construct the set of backhaul sub-frame configuration in the following way:
When mode 1, subframe 3 were configured to up backhaul, according to up feedback sequential, subframe 7 and 8 was configured to descending backhaul subframe.Obtain like this a configuration set 3,7,8}.The uplink feedback information of the downlink traffic transmission of subframe 9 is in subframe 4 transmission, therefore can obtain another one backhaul configuration set 9,4}.Because subframe 4 needs to feed back the downlink transfer of subframe 0 simultaneously, preferably, subframe 3 is configured to up backhaul subframe.
In backhaul sub-frame configuration set { 3,7, among the 8}, for sub-frame of uplink 3, do not exist descending sub frame and this sub-frame of uplink 3 to constitute the subframe combination that is used for uplink traffic transmission and corresponding downstream ACK/NACK transmission of feedback information under the described subframe uplink-downlink configuration that defines among the TDD LTE Release-8 in this backhaul sub-frame configuration set, the transmission time sequence that is backhaul uplink service and corresponding downstream ACK/NACK feedback information can't be finished according to the rule of Rel-8 definition, then needs to define the transmission time sequence of new uplink service and descending ACK/NACK feedback information.The descending ACK/NACK feedback information that can define subframe 3 uplink traffic transmission this moment is in subframe 7 or 8 transmission.In addition, in this backhaul sub-frame configuration set, the transmission time sequence of uplink authorization information and corresponding uplink service also can't be finished according to the Rel-8 standard, also needs to define the transmission time sequence of new uplink authorization information and corresponding uplink service.Particularly, can define the uplink authorization information of subframe 3 uplink traffic transmission in subframe 7 or subframe 8 transmission.
In backhaul sub-frame configuration set { 4, among the 9}, the transmission time sequence of backhaul uplink service and corresponding downstream ACK/NACK feedback information can't be finished according to the Rel-8 standard, needs the new uplink service of definition and the transmission time sequence of descending ACK/NACK feedback information.The descending ACK/NACK feedback information of subframe 4 uplink traffic transmission can be transmitted in subframe 9.The transmission time sequence of same uplink authorization information and corresponding uplink service also can't be finished according to the Rel-8 standard, needs the transmission time sequence of new uplink authorization information of definition and corresponding uplink service.The uplink authorization information of subframe 4 uplink traffic transmission can be transmitted in subframe 9.
Mode 2 can be constructed as follows the set of two backhaul sub-frame configuration: first backhaul sub-frame configuration set be 3,7,8}, second backhaul sub-frame configuration set be 3,4,7,8,9}.
Equally, in the backhaul sub-frame configuration set of constructing under this mode, the transmission time sequence of uplink service and corresponding downstream ACK/NACK feedback information, and the transmission time sequence of uplink authorization information and corresponding uplink service also need redefine, identical with the description in the aforesaid way 1, repeat no more.
Further, also can define the backhaul sub-frame configuration set of having only 1 descending sub frame.For example, have only subframe 7 or subframe 8 to be configured to descending backhaul subframe, subframe 3 is configured to up backhaul subframe, for example, can increase backhaul sub-frame configuration set 3,7} or 3,8}.
Subframe uplink-downlink configuration 4:
This configuration subframe 4,7,8,9 down can be configured to descending backhaul subframe, and subframe 2,3 can be configured to up backhaul subframe.Owing to need to guarantee the uplink of access link, so subframe 2,3 can not be configured to the backhaul sub-frame of uplink simultaneously.Wherein need in the subframe 2 downlink transfer of subframe 1,5,6 is carried out uplink ACK/NACK feedback, and subframe 1,5,6 can not be configured to descending backhaul subframe, so subframe 2 is not configured to up backhaul subframe.For the subframe that can be configured to descending backhaul transmission, the uplink ACK of the downlink traffic transmission of subframe 7,8,9/NACK feedback information is in subframe 3 transmission.Concrete, can construct the set of backhaul sub-frame configuration in the following way:
Mode 1: subframe 3 is configured to up backhaul subframe, simultaneously subframe 7,8,9 is configured to descending backhaul subframe, obtain the set of backhaul sub-frame configuration 3,7,8,9}.
Mode 2: when less or other reasons causes descending sub frame that backhaul need not be so many when the backhaul traffic carrying capacity, can define another backhaul configuration set 3,9}.Promptly can be constructed as follows the set of two backhaul sub-frame configuration: first configuration set be 3, and 9}, second configuration set be 3,7,8,9}.
{ 3,7,8,9} is with { 3, among the 9}, up-downgoing feedback sequential and uplink authorization sequential can be finished according to the standard of Rel-8 in the set of backhaul sub-frame configuration.
Mode 3: further increase by 1 backhaul configuration set of definition 3,8,9} or 3,7,9}.Promptly can be constructed as follows backhaul sub-frame configuration set: first configuration set be 3, and 9}, second configuration set be 3,8,9} or 3,7,9}, can also increase a backhaul sub-frame configuration set 3,7,8,9}.
Under this subframe uplink-downlink configuration, in above-mentioned all backhaul sub-frame configuration set of structure, the transmission time sequence of uplink service and corresponding downstream ACK/NACK feedback information, and the transmission time sequence of uplink authorization information and corresponding uplink service can be finished according to the standard of Rel-8.
Subframe uplink-downlink configuration 5:
Under this subframe uplink-downlink configuration, have only 1 sub-frame of uplink, if be configured as up backhaul subframe, will cause the access link not have sub-frame of uplink to use.Therefore under this subframe uplink-downlink configuration, can't construct suitable backhaul sub-frame configuration set.
Subframe uplink-downlink configuration 6:
Under this subframe uplink-downlink configuration, have only 1 descending sub frame 9 can be configured to descending backhaul subframe.The uplink ACK of subframe 9 downlink traffic transmission/NACK feedback information is in sub-frame of uplink 4 transmission, therefore construct the set of backhaul sub-frame configuration 4,9}.In this backhaul sub-frame configuration set { 4, among the 9}, the transmission time sequence of uplink authorization information and corresponding uplink service can be finished according to the standard of Rel-8, but the transmission time sequence of uplink traffic transmission and descending ACK/NACK feedback information can't be finished according to the Rel-8 standard, can be subframe 9 with the descending ACK/NACK transmission of feedback information subframe definition of subframe 4 uplink traffic transmission therefore.
After the base station has disposed the relay sub-frame that is used for the repeated link transmission in the manner described above, send indication signaling, indicate described some or all of relay sub-frame configuration set to relay station to relay station; Relay station is known described some or all of relay sub-frame configuration set according to described indication signaling, is the relay sub-frame that is used for the repeated link transmission with the sub-frame configuration in the described some or all of relay sub-frame configuration set.
The index of different binary sequences as different relay sub-frame configuration set groups can be used in the base station, by to described relay station transmission and the corresponding binary sequence of relay sub-frame configuration set group that the described part or all of relay sub-frame configuration set of taking out constitutes, indicate the described part or all of relay sub-frame configuration set of taking-up.
The length of binary sequence can be identical under different subframe uplink-downlink configuration, perhaps determines according to the number of the backhaul sub-frame configuration set that can support under every kind of subframe uplink-downlink configuration.
In one example, the length of described binary sequence is identical under different subframe uplink-downlink configuration, and the length of described binary sequence is
Figure GSA00000088334300221
N wherein Max Subframe-setThe maximum of representing the number of relay sub-frame configuration set under each subframe uplink-downlink configuration, Expression rounds up.
For example, suppose 7 kinds of different subframe uplink-downlink configuration for the TDD system, the maximum of defined backhaul sub-frame configuration number of sets is 3, and (number that is the undefined backhaul sub-frame configuration set of certain subframe uplink-downlink configuration is 3, the number of the backhaul sub-frame configuration set of supporting under other subframe uplink-downlink configuration is smaller or equal to 3), promptly
Figure GSA00000088334300223
The length of binary sequence is so
Figure GSA00000088334300224
Promptly use 2 bits to represent employed backhaul sub-frame configuration.For example suppose subframe uplink-downlink configuration 1 given a definition the set of 3 backhaul sub-frame configuration 4,8}, 3,9} and { 3,4,8,9}, can define the backhaul sub-frame configuration set of representing current configuration when this 2 bit sequence is got 00 value so and be 4,8}, the backhaul sub-frame configuration set of getting the current configuration of 01 value representation is { 3,9}, get the set of 10 interval scale backhaul sub-frame configuration for { 3,4,8,9}, 11 values keep not to be used.If do not define the set of backhaul sub-frame configuration under certain subframe uplink-downlink configuration, this binary sequence position reservation is not used so, does not perhaps define this binary sequence under this configuration.
In another example, the length of described binary sequence also can be
Figure GSA00000088334300231
Each symbol connotation as hereinbefore.Still suppose 7 kinds of different subframe uplink-downlink configuration for the TDD system, the maximum of defined backhaul sub-frame configuration number of sets is 3, promptly
Figure GSA00000088334300232
Then the length of binary sequence is
Figure GSA00000088334300233
Promptly use 2 bit-binary sequences to represent employed backhaul sub-frame configuration.For example still suppose subframe uplink-downlink configuration 1 given a definition the set of 3 backhaul sub-frame configuration 4,8}, 3,9} and { 3,4,8,9}, can define so and represent the current backhaul subframe that do not dispose when this 2 bit sequence is got 00 value, represent when getting 01 value that the backhaul sub-frame configuration set of current configuration is 4,8}, the backhaul sub-frame configuration set of getting the current configuration of 10 value representations is { 3,9} gets the set of 11 interval scale backhaul sub-frame configuration for { 3,4,8,9}.If the number of the undefined backhaul sub-frame configuration set of certain subframe uplink-downlink configuration uses according to size binary sequence so successively less than 3, the reservation of residue binary sequence is not used.Equally, if do not support the backhaul sub-frame configuration under certain subframe uplink-downlink configuration, this binary sequence can only be got 00 value so, does not perhaps define this binary sequence under this subframe uplink-downlink configuration.
In another example, described binary sequence length also can be determined according to the number of the backhaul sub-frame configuration set that can support under every kind of subframe uplink-downlink configuration.For example, the length of described binary sequence is
Figure GSA00000088334300234
Wherein i is illustrated in the number of backhaul sub-frame configuration set under the subframe uplink-downlink configuration i, Expression rounds up, i more than or equal to 0 smaller or equal to 6.For example, suppose that the undefined backhaul sub-frame configuration set of TDD system subframe uplink-downlink configuration 3 has 2: 3,8} and 3,7,8}, so
Figure GSA00000088334300236
The length of binary sequence is
Figure GSA00000088334300237
Promptly use 1 bit-binary sequence to represent operable backhaul sub-frame configuration under this subframe uplink-downlink configuration.For example suppose to represent respectively when this 1 bit sequence is got 0 and 1 value above-mentioned 2 subframe configuration sets 3,8} and 3,7,8}.Reservation need not if the configuration set number that binary sequence can be represented, remains the binary sequence value so greater than the configuration set number of reality.If a certain subframe uplink-downlink configuration is not supported the backhaul sub-frame configuration, this binary system index sequence length is 0 so, does not promptly use.
In another example, the length of described binary sequence also can be
Figure GSA00000088334300238
Each symbol connotation as hereinbefore.Still the number of supposing the undefined backhaul sub-frame configuration set of TDD system subframe uplink-downlink configuration 3 is 2, be respectively 3,8} and 3,7,8}, so
Figure GSA00000088334300241
The length of binary sequence is
Figure GSA00000088334300242
Promptly use 2 bits to represent operable backhaul sub-frame configuration under this subframe uplink-downlink configuration.For example can define represent respectively when this 2 bit sequence is got 01,10 values above-mentioned 2 subframe configuration sets 3,8} and 3,7,8}, 00 value representation does not dispose the backhaul subframe, 11 values reservations is not used.If a certain subframe uplink-downlink configuration is not supported the set of backhaul sub-frame configuration, this binary system index sequence length is so, and gets 0 value, and expression does not have the backhaul sub-frame configuration.When a certain subframe uplink-downlink configuration was not supported the set of backhaul sub-frame configuration, the length of this binary system index sequence also can be defined as 0.
Embodiment two:
The basic thought of this programme is, at subframe uplink-downlink configuration different in the TDD system, dispose the downlink relay sub-frame under this subframe uplink-downlink configuration, descending backhaul subframe according to configuration is determined corresponding uplink relay subframe, the corresponding uplink ACK of the downlink traffic transmission/NACK feedback information on this downlink relay sub-frame of transmission on this uplink relay subframe.Can determine according to the downlink business of TDD LTE Release-8 protocol definition and the transmission time sequence of uplink ACK/NACK feedback information.
As shown in Figure 3, the indicating means of the relay sub-frame configuration of present embodiment comprises:
Step 110, at current subframe uplink-downlink configuration, base station configuration is used for the downlink relay sub-frame of downlink communication between base station and the relay station;
Step 120, the base station sends indication signaling to relay station, the downlink relay sub-frame that is used for downlink communication between base station and the relay station that indication is determined;
Indication signaling can adopt the mode of bitmap to indicate the configuring condition of relay sub-frame in the radio frames, whether is configured to downlink relay sub-frame as a certain subframe, perhaps is configured to the subframe position of downlink relay sub-frame etc.
For example, when described indication signaling is indicated the situation of the descending backhaul sub-frame configuration in each radio frames, can adopt the bitmap of 6 bits to indicate.Be specially, whether the descending sub frame in the 1-5 bit representation subframe 3,4,7,8,9 in the bitmap is configured to descending backhaul subframe (get 1 expression and be configured to descending backhaul subframe), and the 6th is not used.If subframe being arranged in 3,4,7,8,9 under certain subframe uplink-downlink configuration is sub-frame of uplink, 0 value can only be got in so corresponding position.For example for subframe uplink-downlink configuration 1, when described bitmap was 010010, expression subframe 4 and 9 was configured to descending backhaul subframe.Because subframe 3,7,8 be sub-frame of uplink, so in the bitmap the 1st, 3,4 of correspondence can only get 0 value.
The length of described indication signaling can be 24 bits also, represents the backhaul sub-frame configuration situation of continuous 4 radio frames.Be specially, whether the descending sub frame in preceding 20 subframes 3,4,7,8,9 of representing continuous 4 radio frames successively of the bitmap of 24 bit long is configured to descending backhaul subframe (get 1 value representation and be configured to descending backhaul subframe), and last 4 are not used.If subframe being arranged in 3,4,7,8,9 under certain subframe uplink-downlink configuration is sub-frame of uplink, 0 value can only be got in so corresponding position.For example, when described bitmap is 000010000000001000000000, represent that the descending sub frame 9 of the 1st and the 3rd radio frames is configured to descending backhaul subframe for subframe uplink-downlink configuration 6.
Similar to the above, the length of described bitmap also can be 5 bits or 20 bits, keeps no 1 bit during promptly 6 bits and 24 bit map and 4 bits remove, and other definition are identical with 24 bit lengths with above-mentioned 6 bits, repeat no more.
After step 130, relay station are received described indication signaling,, determine to constitute the sub-frame of uplink of the subframe combination that defines and this sub-frame of uplink is defined as uplink relay subframe with this downlink relay sub-frame to each downlink relay sub-frame.
The subframe combination of this definition is meant under this subframe uplink-downlink configuration that defines among the TDD LTE Release-8, is used for downlink traffic transmission and the corresponding uplink ACK/sub-frame of uplink of NACK transmission of feedback information and combination of descending sub frame.
Particularly,
Base station and/or relay station are to the downlink relay sub-frame of subframe n-k, the sub-frame of uplink of subframe n is defined as corresponding uplink relay subframe, the uplink ACK of the downlink traffic transmission on the downlink relay sub-frame of subframe n-k/NACK feedback information transmits on the uplink relay subframe of subframe n, and the value of k makes this transmission time sequence meet the downlink business of TDD LTE Release-8 definition and the transmission time sequence of corresponding uplink ACK/NACK feedback information; Perhaps
Base station and/or relay station are to the downlink relay sub-frame of subframe n, the sub-frame of uplink of subframe n+k ' is defined as corresponding uplink relay subframe, the uplink ACK of the downlink traffic transmission on the downlink relay sub-frame of subframe n/NACK feedback information transmits on the uplink relay subframe of subframe n+k ', and the value of k makes this transmission time sequence meet the downlink business of TDD LTE Release-8 definition and the transmission time sequence of corresponding uplink ACK/NACK feedback information.
Be scaled new form of presentation according to the sequential relationship in the table 2.Sequential relationship after the described conversion is as shown in table 5.Table 5 shows and satisfies the k ' list of values of the professional uplink feedback information that transmits of n descending sub frame in the sequential relationship of n+k ' work song frame transmission.
The uplink ACK of downlink business in the table 5TDD LTE system/NACK feedback timing k ' value table
Figure GSA00000088334300261
Below will be at 7 kinds of subframe uplink-downlink configuration of TDD system, the backhaul sub-frame configuration method of this programme is described in detail.
Subframe uplink-downlink configuration 0:
For subframe uplink-downlink configuration 0, { 0,1,5,6} does not have descending sub frame can be used for descending backhaul transmission outward, does not therefore support the backhaul sub-frame configuration method of present embodiment under this subframe uplink-downlink configuration to remove subframe.
Subframe uplink-downlink configuration 1:
For subframe uplink-downlink configuration 1, subframe 4 and 9 can be configured to descending backhaul subframe.And according to the downlink business of Rel-8 definition and the transmission time sequence of corresponding uplink ACK/NACK feedback information, the uplink ACK/NACK feedback information of subframe 4,9 downlink traffic transmission is respectively in subframe 8 and 3 transmission.If therefore subframe 4 is configured to descending backhaul subframe, so according to this programme, relay station determines that subframe 8 is up backhaul subframe; If subframe 9 is configured to descending backhaul subframe, relay station determines that subframe 3 is up backhaul subframe.
Subframe uplink-downlink configuration 2:
For subframe uplink-downlink configuration 2, subframe 3,4,8,9 can be configured to descending backhaul subframe.And according to the downlink business of Rel-8 definition and the transmission time sequence of corresponding uplink ACK/NACK feedback information, uplink ACK/NACK the feedback information of subframe 9,3 downlink traffic transmission is in subframe 7 transmission, and the uplink ACK/NACK feedback information of subframe 4,8 downlink traffic transmission is in subframe 2 transmission.Therefore, if subframe 9 and/or 3 is configured to descending backhaul subframe, so according to this programme, relay station determines that subframe 7 is up backhaul subframe; If subframe 4 and/or 8 is configured to descending backhaul subframe, so according to this programme, relay station determines that subframe 2 is up backhaul subframe.Preferably, subframe 9,3 and subframe 4,8 are not configured to descending sub frame simultaneously.
Subframe uplink-downlink configuration 3:
For subframe uplink-downlink configuration 3, subframe 7,8,9 can be configured to descending backhaul subframe.And according to the downlink business of Rel-8 definition and the transmission time sequence of corresponding uplink ACK/NACK feedback information, the uplink ACK/NACK feedback information of subframe 7,8,9 downlink traffic transmission is respectively in subframe 3,3,4 transmission.If therefore subframe 7 and/or 8 is configured to descending backhaul subframe, so according to the inventive method, relay station determines that subframe 3 is up backhaul subframe; If subframe 9 is configured to descending backhaul subframe, relay station determines that subframe 4 is up backhaul subframe.
Subframe uplink-downlink configuration 4:
For subframe uplink-downlink configuration 4, subframe 4,7,8 and 9 can be configured to descending backhaul subframe.And according to the downlink business of Rel-8 definition and the transmission time sequence of corresponding uplink ACK/NACK feedback information, the uplink ACK/NACK feedback information of subframe 4,7,8 and 9 downlink traffic transmission is respectively in subframe 2,3,3,3 transmission.If therefore subframe 4 is configured to descending backhaul subframe, so according to this programme, relay station determines that subframe 2 is up backhaul subframe; If subframe 7 and/or 8 and/or 9 is configured to descending backhaul subframe, relay station determines that subframe 3 is up backhaul subframe.
Subframe uplink-downlink configuration 5:
For subframe uplink-downlink configuration 5, because if having only a sub-frame of uplink, if this subframe is configured to up backhaul subframe, to cause the access link uplink traffic transmission not have resource to use, therefore under this subframe uplink-downlink configuration, not support the backhaul sub-frame configuration method that this programme is described.
Subframe uplink-downlink configuration 6:
For subframe uplink-downlink configuration 6, have only subframe 9 can be configured to descending backhaul subframe.And according to the downlink business of Rel-8 definition and the transmission time sequence of corresponding uplink ACK/NACK feedback information, the uplink ACK of subframe 9 downlink traffic transmission/NACK feedback information is in subframe 4 transmission.If therefore subframe 9 is configured to descending backhaul subframe, so according to this programme, relay station determines that subframe 4 is up backhaul subframe.
7 kinds of ascending-descending subframes configurations for the TDD system, such scheme can be summarized: if descending sub frame n is configured to descending backhaul subframe, determine that so sub-frame of uplink n+l is the backhaul subframe, l determines according to the downlink business of Rel-8 definition and the transmission time sequence of corresponding uplink ACK/NACK feedback information.Can obtain the list of values of a l like this, as shown in table 6.
Descending and up backhaul subframe sequential relationship l list of values in the table 6 TDD LTE system
Figure GSA00000088334300281
Like this, relay station just can have been determined the pairing uplink relay subframe of downlink relay sub-frame easily by tabling look-up.
After the base station selects one or more sub-frame configuration to be downlink relay sub-frame at current subframe uplink-downlink configuration, wherein:
To subframe uplink-downlink configuration 1, with the one or more downlink relay sub-frame that are configured in the subframe 4,9;
To subframe uplink-downlink configuration 2, with the one or more downlink relay sub-frame that are configured in the subframe 3,4,8,9;
To subframe uplink-downlink configuration 3, with the one or more downlink relay sub-frame that are configured in the subframe 7,8,9;
To subframe uplink-downlink configuration 4, with the one or more downlink relay sub-frame that are configured in the subframe 4,7,8,9;
To subframe uplink-downlink configuration 6, subframe 9 is configured to downlink relay sub-frame.
Corresponding uplink relay subframe can be determined according to the downlink relay sub-frame of configuration according to the mode identical with relay station in the base station, particularly:
Subframe uplink-downlink configuration 1, subframe 4 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 8; Perhaps, subframe 9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 3; Subframe 4,9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 8,3;
Subframe uplink-downlink configuration 2, subframe 3 and/or 9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 7; Perhaps, subframe 4 and/or 8 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 2;
Subframe uplink-downlink configuration 3, subframe 7 and/or 8 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 3; Perhaps, subframe 9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 4; Perhaps, at least one subframe and subframe 9 in the subframe 7,8 are configured to downlink relay sub-frame, and corresponding uplink relay subframe is subframe 3 and 4;
Subframe uplink-downlink configuration 4, at least one in the subframe 7,8,9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 3; Perhaps, subframe 4 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 2;
Subframe uplink-downlink configuration 6, subframe 9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 4.
But, one at present embodiment becomes in the example, also can be according to the relay sub-frame configuration set of mode arrangement on the base station of embodiment one, the base station is when the configuration relay sub-frame, taking out the some or all of relay sub-frame configuration set corresponding with current subframe uplink-downlink configuration of configuration, is the relay sub-frame that is used for the repeated link transmission under the current subframe uplink-downlink configuration with the sub-frame configuration in the described some or all of relay sub-frame configuration set.
Adopt present embodiment to carry out after the backhaul sub-frame configuration, can cause the transmission time sequence of the uplink service of backhaul link under some subframe uplink-downlink configuration and corresponding downstream ACK/NACK feedback information can't be consistent, and uplink authorization information can't be consistent with the definition of Rel-8 agreement with the transmission time sequence of corresponding uplink service under some subframe uplink-downlink configuration with the definition of Rel-8.At this situation, can define again the transmission time sequence of the uplink service of backhaul link and corresponding downstream ACK/NACK feedback information and/or the transmission time sequence of uplink authorization information and corresponding uplink service according to backhaul sub-frame configuration situation.When the transmission time sequence of uplink service in the backhaul subframe group that uplink and downlink backhaul subframe is formed and corresponding downstream ACK/NACK feedback information can't transmit according to the sequential of Rel-8 agreement regulation, define the new uplink service and the transmission time sequence of corresponding downstream ACK/NACK feedback information in backhaul subframe group, the professional and corresponding ACK/NACK downlink feedback information of backhaul subframe uplink transmits according to new transmission time sequence; When the transmission time sequence of uplink authorization information in the backhaul subframe group and corresponding uplink service can't transmit according to the sequential of Rel-8 protocol definition, in backhaul subframe group, define the transmission time sequence of new uplink authorization information and corresponding uplink service.
The method of the realization relay transmission after having determined the uplink and downlink relay sub-frame, present embodiment can adopt the method identical with embodiment one.
Below in conjunction with each subframe uplink-downlink configuration, this problem is further described.
For subframe uplink-downlink configuration 0, do not involve this problem.
For subframe uplink-downlink configuration 1, the transmission time sequence of backhaul link uplink service and corresponding downstream ACK/NACK feedback, and the transmission time sequence of uplink authorization information and corresponding uplink service all identical with the definition of Rel-8 agreement.
For subframe uplink-downlink configuration 2, if subframe 3 or 8 is configured to descending backhaul subframe, so according to this programme, the transmission time sequence of the descending ACK/NACK feedback information of backhaul link is identical with the definition of uplink authorization sequential and Rel-8 agreement.If subframe 9 or 4 is configured to descending backhaul subframe and subframe 3 or 8 is not configured to descending backhaul subframe, the transmission time sequence of the descending ACK/NACK feedback information of backhaul link and uplink authorization sequential need redefine so.But the downstream feedback time delay that the problem that produce this moment is the backhaul link will be very big.Therefore when the descending backhaul subframe of 1 of needs, preferentially subframe 3 or 8 is configured to descending backhaul subframe, when the more backhaul subframe of needs, can considers subframe 9 or 4 is configured to descending backhaul subframe.At this time the transmission time sequence of the descending ACK/NACK feedback information of backhaul link is identical with the definition of uplink authorization sequential and Rel-8 agreement.
For subframe uplink-downlink configuration 3, if subframe 7 and/or 8 is configured to descending backhaul subframe, so according to this programme, subframe 3 is just as up backhaul subframe.At this moment, the transmission time sequence of the transmission time sequence of the uplink service of backhaul link and corresponding downstream ACK/NACK feedback, uplink authorization information and corresponding uplink service all can't guarantee and the definition of Rel-8 agreement consistent.Then redefine the transmission time sequence of uplink service and corresponding downstream ACK/NACK feedback, and the transmission time sequence of uplink authorization information and corresponding uplink service.For example, the downstream feedback sequential is defined as the descending ACK/NACK feedback information of subframe 3 uplink in subframe 7 transmission, perhaps is defined as in subframe 8 transmission; The uplink authorization sequential is defined as the uplink authorization of subframe 3 uplink traffic transmission in subframe 7 transmission, perhaps is defined as in subframe 8 transmission.In like manner, if subframe 9 is configured to descending backhaul subframe, subframe 4 is just as up backhaul subframe so.At this time backhaul link downstream feedback sequential can't guarantee consistent with the definition of Rel-8 agreement with the uplink authorization sequential.Can redefine downstream feedback sequential and uplink authorization sequential at the backhaul link.For example, the downstream feedback sequential is defined as the descending ACK/NACK feedback information of subframe 4 uplink in subframe 9 transmission; The uplink authorization sequential is defined as the uplink authorization of subframe 4 uplink traffic transmission in subframe 9 transmission.
For subframe uplink-downlink configuration 4, a descending backhaul subframe so preferably is configured to descending sub frame 9 descending backhaul subframe if desired, and according to this programme, sub-frame of uplink 3 is configured to descending backhaul subframe.The transmission time sequence of the transmission time sequence of the uplink service of backhaul link and corresponding downstream ACK/NACK feedback, uplink authorization information and corresponding uplink service all is consistent with Rel-8 at this moment.More if desired descending backhaul subframe can also further be configured to subframe 7 and/or 8 descending backhaul subframe.
For subframe uplink-downlink configuration 5, do not involve this problem.
For subframe uplink-downlink configuration 6, subframe 9 can be configured to descending backhaul subframe.According to the present invention program, subframe 4 is used as up backhaul subframe.At this moment the transmission time sequence of backhaul uplink authorization information and corresponding uplink service can be consistent with Rel-8, but the transmission time sequence of uplink service and corresponding downstream ACK/NACK feedback can't be consistent with the definition of Rel-8 agreement, and the descending ACK/NACK feedback information that then can redefine subframe 4 uplink traffic transmission is in subframe 9 transmission.
Based on the method for embodiment one and embodiment two, the present invention also provides a kind of time division duplex (TDD) system, comprises at least one base station and relay station, wherein:
Described base station comprises:
The first relay sub-frame determination module, be used for determining being used under the current subframe uplink-downlink configuration relay sub-frame group that the relay sub-frame of repeated link transmission constitutes, to each descending sub frame in this relay sub-frame group, all there are a sub-frame of uplink and this descending sub frame to constitute under this subframe uplink-downlink configuration that defines among the TDD LTE Release-8 in this relay sub-frame group, are used for downlink traffic transmission and the corresponding uplink ACK/sub-frame of uplink of NACK transmission of feedback information and combination of descending sub frame;
Indicating module is used to send indication signaling, and the information of definite relay sub-frame is indicated to relay station;
First communication module is used to use and carries out uplink and downlink between relay sub-frame and the relay station and communicate by letter;
Described relay station comprises:
The second relay sub-frame determination module is used for being identified for the relay sub-frame that repeated link transmits according to described indication signaling;
Second communication module is used to use and carries out uplink and downlink between relay sub-frame and the base station and communicate by letter;
Described first communication module and second communication module carry out the transmission of downlink business and corresponding uplink ACK/NACK feedback information according to the transmission time sequence of the downlink business that defines among the TDD LTE Release-8 and corresponding uplink ACK/NACK feedback information.
Wherein,
The first relay sub-frame determination module can be finished the configuration of the uplink and downlink relay sub-frame that is used for the repeated link transmission on the base station according to the relay sub-frame configuration method among the foregoing description one or the embodiment two.
Indicating module can be indicated described part or all of relay sub-frame configuration set to relay station according to the indicating means of the relay sub-frame configuration in the foregoing description one; The second relay sub-frame determination module is known described part or all of relay sub-frame configuration set according to described indication signaling, subframe wherein is defined as being used for the relay sub-frame of repeated link transmission; Perhaps
Indicating module is indicated the information of the downlink relay sub-frame of configuration to relay station according to the indicating means of the relay sub-frame configuration in the foregoing description two; Second relay sub-frame is determined the downlink relay sub-frame of configuration according to indication, and determines corresponding uplink relay subframe according to the relay sub-frame configuration method in the foregoing description two.
Can carry out the transmission of uplink service and corresponding descending ACK/NACK feedback information according to the method for the realization relay transmission among the foregoing description one and the embodiment two between first communication module and the second communication module, and the transmission of uplink authorization information and corresponding uplink service.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (29)

1. relay sub-frame configuration method is used to comprise it is characterized in that time division duplex (TDD) system of at least one base station and relay station, comprising:
At used subframe uplink-downlink configuration, be configured to carry out between base station and the relay station one or more relay sub-frame configuration set of uplink and downlink communication, to each descending sub frame in the described relay sub-frame configuration set, in same relay sub-frame configuration set, all there are a sub-frame of uplink and this descending sub frame to constitute subframe combination, and this subframe combination is under this subframe uplink-downlink configuration that defines among the TDD LTE Release-8, is used for downlink traffic transmission and one of the corresponding uplink ACK/sub-frame of uplink of NACK transmission of feedback information and combination of descending sub frame.
2. relay sub-frame configuration method as claimed in claim 1 is characterized in that:
Described subframe combination in the described relay sub-frame configuration set still is under this subframe uplink-downlink configuration that defines among the TDD LTE Release-8, be used for uplink traffic transmission and one of the sub-frame of uplink of corresponding downstream ACK/NACK transmission of feedback information and combination of descending sub frame, and/or be used for uplink authorization message transmission and one of the sub-frame of uplink of corresponding uplink traffic transmission and combination of descending sub frame.
3. relay sub-frame configuration method as claimed in claim 1 is characterized in that:
Described relay sub-frame configuration set is only at the subframe uplink-downlink configuration structure that comprises at least 2 sub-frame of uplink in the radio frames, subframe in the described relay sub-frame configuration set is subframe set { 2,3,4,7,8, the subclass of 9}, the subframe numbers of subframe in radio frames that comprises in the numeral relay sub-frame configuration set in " { } ";
At described subframe uplink-downlink configuration, when the set of described relay sub-frame configuration has when a plurality of, there is not identical subframe between the different relay sub-frame configuration set, perhaps having a relay sub-frame configuration set at least is the subclass of another relay sub-frame configuration set.
4. relay sub-frame configuration method as claimed in claim 3 is characterized in that:
Described used subframe uplink-downlink configuration comprises subframe uplink-downlink configuration 1, and the set of the relay sub-frame configuration of relative configurations is in the following subframe set one or more: 4,8}, 3,9} and 3,4,8,9}.
5. relay sub-frame configuration method as claimed in claim 1 is characterized in that:
Described used subframe uplink-downlink configuration comprises subframe uplink-downlink configuration 2, and the relay sub-frame configuration set of relative configurations is one or more in the following subframe set: { 3,7,9} and { 3,7} perhaps be during following subframe is gathered one or more: { 2,4,8} and 2,8}.
6. relay sub-frame configuration method as claimed in claim 1 is characterized in that:
Described used subframe uplink-downlink configuration comprises subframe uplink-downlink configuration 3, and the set of the relay sub-frame configuration of relative configurations is in the following subframe set one or more: 3,7}, 3,8}, 3,7,8}, 4,9} and 3,4,7,8,9}.
7. relay sub-frame configuration method as claimed in claim 1 is characterized in that:
Described used subframe uplink-downlink configuration comprises subframe uplink-downlink configuration 4, and the set of the relay sub-frame configuration of structure is in the following subframe set one or more: 3,9}, 3,8,9}, 3,7,9} and 3,7,8,9}.
8. relay sub-frame configuration method as claimed in claim 1 is characterized in that:
Described used subframe uplink-downlink configuration comprises subframe uplink-downlink configuration 6, the set of the relay sub-frame configuration of relative configurations for 4,9}.
9. relay sub-frame configuration method as claimed in claim 1 is characterized in that:
Described used subframe uplink-downlink configuration comprises subframe uplink-downlink configuration 0, the relay sub-frame configuration set of relative configurations is one or more in the following subframe set: { 1,7}, { 2,6} and { 1,2,6,7}, the wherein subframe numbers of subframe in radio frames that comprises in the set of the numeral relay sub-frame configuration in " { } ".
10. as the described relay sub-frame configuration method of arbitrary claim in the claim 1 to 9, it is characterized in that:
With the structure described relay sub-frame configuration set configuration on the base station, when the configuration relay sub-frame, the some or all of relay sub-frame configuration set corresponding with current subframe uplink-downlink configuration of configuration taken out in the base station, is the relay sub-frame that is used for the repeated link transmission under the current subframe uplink-downlink configuration with the sub-frame configuration in the described some or all of relay sub-frame configuration set.
11. the configuration of a relay sub-frame and indicating means are used to comprise it is characterized in that time division duplex (TDD) system of at least one base station and relay station, comprising:
According to the described relay sub-frame configuration method of claim 10, the base station is defined as the subframe in the described some or all of relay sub-frame configuration set to be used under the current subframe uplink-downlink configuration relay sub-frame of repeated link transmission;
The base station sends indication signaling to relay station, indicates described some or all of relay sub-frame configuration set to relay station; Relay station is known described some or all of relay sub-frame configuration set according to described indication signaling, the subframe in the described some or all of relay sub-frame configuration set is defined as being used for the relay sub-frame of repeated link transmission.
12. configuration as claimed in claim 11 and indicating means is characterized in that:
The index of different binary sequences as different relay sub-frame configuration set groups used in described base station, by to described relay station transmission and the corresponding binary sequence of relay sub-frame configuration set group that described part or all of relay sub-frame configuration set constitutes, indicate the described part or all of relay sub-frame configuration set of taking-up.
13. configuration as claimed in claim 11 and indicating means is characterized in that:
The number of the uplink and downlink relay sub-frame of needs is determined according to traffic carrying capacity in described base station, and the number of the subframe in the described part or all of relay sub-frame configuration set of taking-up satisfies this number requirement.
14. configuration according to claim 12 and indicating means is characterized in that:
The length of described binary sequence is identical under different subframe uplink-downlink configuration, for
Figure FSA00000088334200031
N wherein Max Subframe-setThe maximum of representing the number of relay sub-frame configuration set under each subframe uplink-downlink configuration,
Figure FSA00000088334200032
Expression rounds up; Perhaps,
The length of described binary sequence is identical under different subframe uplink-downlink configuration, for
Figure FSA00000088334200033
N wherein Max Subframe-setThe maximum of representing the number of relay sub-frame configuration set under each subframe uplink-downlink configuration,
Figure FSA00000088334200034
Expression rounds up; Perhaps
The length of described binary sequence is
Figure FSA00000088334200035
Wherein i is the sequence number of subframe uplink-downlink configuration, N i Subframe-setBe illustrated in the number of relay sub-frame configuration set under the subframe uplink-downlink configuration i,
Figure FSA00000088334200036
Expression rounds up, i more than or equal to 0 smaller or equal to 6; Perhaps,
The length of described binary sequence is
Figure FSA00000088334200041
Wherein i is the sequence number of subframe uplink-downlink configuration, N i Subframe-setBe illustrated in the number of relay sub-frame configuration set under the subframe uplink-downlink configuration i, Expression rounds up, i more than or equal to 0 smaller or equal to 6.
15. a relay sub-frame configuration method is used to comprise it is characterized in that time division duplex (TDD) system of at least one base station and relay station, comprising:
At current subframe uplink-downlink configuration, base station configuration and/or relay station are known the downlink relay sub-frame that is used for downlink communication between base station and the relay station of configuration;
Base station and/or relay station are to each downlink relay sub-frame, find with this downlink relay sub-frame and constitute a sub-frame of uplink of the subframe combination that defines and this sub-frame of uplink is defined as the corresponding uplink relay subframe of this downlink relay sub-frame, the subframe combination of this definition is meant under the described subframe uplink-downlink configuration that defines among the TDD LTE Release-8, is used for downlink traffic transmission and the corresponding uplink ACK/sub-frame of uplink of NACK transmission of feedback information and combination of descending sub frame.
16. relay sub-frame configuration method as claimed in claim 15 is characterized in that, described base station and/or relay station are determined uplink relay subframe in the following manner to each downlink relay sub-frame:
Base station and/or relay station are to the downlink relay sub-frame of subframe n-k, the sub-frame of uplink of subframe n is defined as corresponding uplink relay subframe, the uplink ACK of the downlink traffic transmission on the downlink relay sub-frame of subframe n-k/NACK feedback information transmits on the uplink relay subframe of subframe n, and the value of k makes this transmission time sequence meet the downlink business of TDD LTE Release-8 definition and the transmission time sequence of corresponding uplink ACK/NACK feedback information; Perhaps
Base station and/or relay station are to the downlink relay sub-frame of subframe n, the sub-frame of uplink of subframe n+k ' is defined as corresponding uplink relay subframe, the uplink ACK of the downlink traffic transmission on the downlink relay sub-frame of subframe n/NACK feedback information transmits on the uplink relay subframe of subframe n+k ', and the value of k makes this transmission time sequence meet the downlink business of TDD LTE Release-8 definition and the transmission time sequence of corresponding uplink ACK/NACK feedback information.
17. relay sub-frame configuration method as claimed in claim 15 is characterized in that:
Described base station and/or relay station dispose the sequential relationship and the list of values of downlink relay sub-frame and uplink relay subframe, when the descending sub frame of subframe n is configured to downlink relay sub-frame, by searching this sequential relationship and list of values, the sub-frame of uplink of subframe n+1 is defined as corresponding uplink relay subframe, and sequential and value at following subframe uplink-downlink configuration in this sequential relationship and the list of values are as follows:
Subframe uplink-downlink configuration 1, the one or more downlink relay sub-frame that are configured in the subframe 4,9, corresponding l value is 4,4;
Subframe uplink-downlink configuration 2, the one or more downlink relay sub-frame that are configured in the subframe 3,4,8,9, corresponding l value is followed successively by 4,8,4,8;
Subframe uplink-downlink configuration 3, the one or more downlink relay sub-frame that are configured in the subframe 7,8,9, corresponding l value is followed successively by 6,5,5;
Subframe uplink-downlink configuration 4, the one or more downlink relay sub-frame that are configured in the subframe 4,7,8,9, corresponding l value is followed successively by 8,6,5,4;
Subframe uplink-downlink configuration 6, subframe 9 can be configured to downlink relay sub-frame, and corresponding l value is 5.
18. relay sub-frame configuration method as claimed in claim 15 is characterized in that, described current subframe uplink-downlink configuration is one or more in the following subframe uplink-downlink configuration, and the downlink relay sub-frame and the uplink relay subframe of corresponding configuration are as follows:
Subframe uplink-downlink configuration 1, subframe 4 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 8; Perhaps, subframe 9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 3; Subframe 4,9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 8,3;
Subframe uplink-downlink configuration 2, subframe 3 and/or 9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 7; Perhaps, subframe 4 and/or 8 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 2;
Subframe uplink-downlink configuration 3, subframe 7 and/or 8 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 3; Perhaps, subframe 9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 4; Perhaps, at least one subframe and subframe 9 in the subframe 7,8 are configured to downlink relay sub-frame, and corresponding uplink relay subframe is subframe 3 and 4;
Subframe uplink-downlink configuration 4, at least one in the subframe 7,8,9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 3; Perhaps, subframe 4 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 2;
Subframe uplink-downlink configuration 6, subframe 9 is configured to downlink relay sub-frame, and corresponding uplink relay subframe is a subframe 4.
19. the configuration of a relay sub-frame and indicating means are used to comprise it is characterized in that time division duplex (TDD) system of at least one base station and relay station, comprising:
The base station sends indication signaling to relay station, the downlink relay sub-frame that is used for downlink communication between base station and the relay station of indication configuration;
Relay station is known the described downlink relay sub-frame of configuration from described indication signaling, determine corresponding uplink relay subframe by claim 15,16,17 or 18 described relay sub-frame configuration methods again.
20. configuration as claimed in claim 19 and indicating means is characterized in that:
Described base station is by the downlink relay sub-frame of the bitmap in the indication signaling to relay station indication configuration;
The length of this bitmap is 5 or 6 bits, and 5 subframes 3,4,7,8 and 9 that correspond respectively in the radio frames wherein are used to indicate the position of the downlink relay sub-frame in 1 radio frames; Perhaps
The length of this bitmap is 20 or 24 bits, comprises 45 bits or 6 bits, and 5 subframes 3,4,7,8 and 9 that correspond respectively in the radio frames in each 5 bit or 6 bits are used to indicate the position of the downlink relay sub-frame in 4 radio frames.
21. configuration as claimed in claim 19 and indicating means is characterized in that:
Described base station is used for the uplink relay subframe and the downlink relay sub-frame of repeated link transmission according to the described relay sub-frame configuration method configuration of claim 10.
22. configuration as claimed in claim 19 and indicating means is characterized in that:
It is downlink relay sub-frame that one or more sub-frame configuration are selected at current subframe uplink-downlink configuration in described base station, determines corresponding uplink relay subframe according to claim 15,16,17 or 18 described relay sub-frame configuration methods again; Wherein:
To subframe uplink-downlink configuration 1, with the one or more downlink relay sub-frame that are configured in the subframe 4,9;
To subframe uplink-downlink configuration 2, with the one or more downlink relay sub-frame that are configured in the subframe 3,4,8,9;
To subframe uplink-downlink configuration 3, with the one or more downlink relay sub-frame that are configured in the subframe 7,8,9;
To subframe uplink-downlink configuration 4, with the one or more downlink relay sub-frame that are configured in the subframe 4,7,8,9;
To subframe uplink-downlink configuration 6, subframe 9 is configured to downlink relay sub-frame.
23. a method that realizes relay transmission is used to comprise it is characterized in that time division duplex (TDD) system of at least one base station and relay station, comprising:
The base station is determined to be used under the current subframe uplink-downlink configuration relay sub-frame group that the relay sub-frame of repeated link transmission constitutes and is notified relay station, to each descending sub frame in this relay sub-frame group, all there are a sub-frame of uplink and this descending sub frame to constitute under this subframe uplink-downlink configuration that defines among the TDD LTE Release-8 in this relay sub-frame group, are used for downlink traffic transmission and the corresponding uplink ACK/sub-frame of uplink of NACK transmission of feedback information and combination of descending sub frame;
When using described relay sub-frame group to carry out uplink and downlink communication between described base station and the relay station, carry out the transmission of downlink business and corresponding uplink ACK/NACK feedback information according to the transmission time sequence of the downlink business that defines among the TDD LTE Release-8 and corresponding uplink ACK/NACK feedback information.
24. method as claimed in claim 23 is characterized in that:
To each sub-frame of uplink in this relay sub-frame group, be used for uplink traffic transmission and the sub-frame of uplink of corresponding downstream ACK/NACK transmission of feedback information and the combination of descending sub frame under this subframe uplink-downlink configuration that defines among the TDD LTE Release-8 as existing descending sub frame and this sub-frame of uplink to constitute in this relay sub-frame group, the uplink service that defines among the use TDD LTE Release-8 between then described base station and the relay station and the transmission time sequence of corresponding descending ACK/NACK feedback information carry out the transmission of uplink service and corresponding descending ACK/NACK feedback information; Otherwise, definition one descending subframe in this relay sub-frame group, be used for this sub-frame of uplink on uplink traffic transmission corresponding downstream ACK/NACK transmission of feedback information, described base station and relay station use the uplink service of this redetermination and the transmission time sequence of corresponding descending ACK/NACK feedback information to carry out the transmission of uplink service and corresponding descending ACK/NACK feedback information.
25. method as claimed in claim 23 is characterized in that:
To each sub-frame of uplink in this relay sub-frame group, exist descending sub frame and this sub-frame of uplink to constitute as described in the relay sub-frame group and be used for uplink authorization message transmission and the sub-frame of uplink of corresponding uplink traffic transmission and the combination of descending sub frame under the described subframe uplink-downlink configuration that defines among the TDD LTE Release-8, the uplink authorization information that defines among the use TDD LTE Release-8 between then described base station and the relay station and the transmission time sequence of corresponding uplink service carry out the transmission of uplink authorization information and corresponding uplink service; Otherwise, definition one descending subframe in this relay sub-frame group, be used for this sub-frame of uplink on the corresponding uplink authorization message transmission of uplink traffic transmission, base station and relay station use the uplink authorization information of this redetermination and the transmission time sequence of corresponding uplink service to carry out the transmission of uplink authorization information and corresponding uplink service.
26. method as claimed in claim 23 is characterized in that:
Described relay station is indicated the terminal to Rel-8 with the descending sub frame in the described relay sub-frame as Multicast Broadcast Single Frequency Network (MBSFN) subframe, when described relay station needs to send the descending ACK/NACK feedback information of uplink authorization information and/or uplink service on described descending sub frame, send the descending ACK/NACK feedback information of described uplink authorization information and/or uplink service in corresponding to the MBSFN subframe on the running time-frequency resource of control domain at described descending sub frame.
27. method as claimed in claim 23 is characterized in that:
Base station and relay station determine to be used under the current subframe uplink-downlink configuration relay sub-frame of repeated link transmission according to claim 11,12,13,14,21 or 22 described relay sub-frame configuration and indicating means.
28. a time division duplex (TDD) system comprises at least one base station and relay station, it is characterized in that, wherein:
Described base station comprises:
The first relay sub-frame determination module, be used for determining being used under the current subframe uplink-downlink configuration relay sub-frame group that the relay sub-frame of repeated link transmission constitutes, to each descending sub frame in this relay sub-frame group, all there are a sub-frame of uplink and this descending sub frame to constitute under this subframe uplink-downlink configuration that defines among the TDD LTE Release-8 in this relay sub-frame group, are used for downlink traffic transmission and the corresponding uplink ACK/sub-frame of uplink of NACK transmission of feedback information and combination of descending sub frame;
Indicating module is used to send indication signaling, and the information of definite relay sub-frame is indicated to relay station;
First communication module is used to use and carries out uplink and downlink between relay sub-frame and the relay station and communicate by letter;
Described relay station comprises:
The second relay sub-frame determination module is used for being identified for the relay sub-frame that repeated link transmits according to described indication signaling;
Second communication module is used to use and carries out uplink and downlink between relay sub-frame and the base station and communicate by letter;
Described first communication module and second communication module carry out the transmission of downlink business and corresponding uplink ACK/NACK feedback information according to the transmission time sequence of the downlink business that defines among the TDD LTE Release-8 and corresponding uplink ACK/NACK feedback information.
29. time division duplex as claimed in claim 28 (TDD) system is characterized in that:
The described first relay sub-frame determination module is finished the configuration of the uplink and downlink relay sub-frame that is used for the repeated link transmission on the base station according to claim 10 or 22 described relay sub-frame configuration methods;
Described indicating module is indicated described part or all of relay sub-frame configuration set according to the indicating means of claim 11,12 or 14 described relay sub-frame configuration to relay station; The described second relay sub-frame determination module is known described part or all of relay sub-frame configuration set according to described indication signaling, subframe wherein is defined as being used for the relay sub-frame of repeated link transmission; Perhaps, described indicating module is indicated the information of the downlink relay sub-frame of configuration to relay station according to the indicating means of claim 19 or 22 described relay sub-frame configuration; Described second relay sub-frame is determined the downlink relay sub-frame of configuration according to indication, and determines corresponding uplink relay subframe according to claim 15,16,17 or 18 described relay sub-frame configuration methods.
CN2010101573905A 2010-04-01 2010-04-01 Configuration and indication method of relay sub-frames as well as method and system for realizing relay transmission Pending CN102215060A (en)

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