CN102137500A - Method, base station and system for data transmission - Google Patents
Method, base station and system for data transmission Download PDFInfo
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- CN102137500A CN102137500A CN201010105145XA CN201010105145A CN102137500A CN 102137500 A CN102137500 A CN 102137500A CN 201010105145X A CN201010105145X A CN 201010105145XA CN 201010105145 A CN201010105145 A CN 201010105145A CN 102137500 A CN102137500 A CN 102137500A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
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- H04W84/047—Public Land Mobile systems, e.g. cellular systems using dedicated repeater stations
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Abstract
The invention discloses a method, a base station and a system for data transmission, which belong to the technical field of communication. The method comprises the following steps of: in a time division duplex (TDD) network, taking initial time of the network as reference by the base station of a cell where relay nodes are arranged, keeping uplink parts of an uplink sub-frame and a special sub-frame on a time line of the cell constant, re-configuring the length of protective time for the special sub-frame on the time line of the cell, taking the downlink parts of the downlink sub-frame and the special sub-frame on the initial time line as reference, delaying the downlink parts of the downlink sub-frame and the special sub-frame of the initial time line after the protective time of the cell is re-configured to obtain a new time line, and performing data transmission with user equipment (UE) or the relay nodes according to the new time line. The base station comprises a processing module and a sending module. The system comprises the base station and the relay node. According to the embodiment of the invention, the protective time and the downlink time for the time line of the cell with the relay nodes are adjusted to avoid interruption.
Description
Technical field
The present invention relates to communication technical field, particularly a kind of method, base station and system of transmitting data.
Background technology
In TDD (Time Division Duplex, time division duplex) network, adopt relaying technique (Relaying) can provide good user to cover and data throughout.At one time, as eNB (enhanced Node Base, the base station) and the relaying back haul link between the relaying Relay node, UE (User Equipment with via node and its service, subscriber equipment) the relaying access link between, when adopting identical frequency band or nearby frequency bands to communicate, if via node sends simultaneously and receives, then the signal of via node transmission can be received by via node oneself again, thereby form interference, bring winding self-interference (self-backhaul interference) problem the received signal of via node.
For fear of the winding self-interference, the time that the time of the data that via node sends at the UE that receives its service and via node send data to the base station at its place need intersect staggers; The time that via node sends data to the UE of its service also needed to intersect to stagger with the time that via node reception base station sends data to it.So at any time via node can not receive simultaneously and send in identical frequency band, thereby does not have winding self-interference problem.
In the communication system, data are that unit assembles and transmits with the subframe.In the TDD system, three class subframe structures are arranged: descending sub frame (D), sub-frame of uplink (U) and special subframe (S).For the base station, descending sub frame is used to transmit data and gives UE, and sub-frame of uplink is used to receive the data from UE or via node.Special subframe is used for from descending sub frame comprising descender Dw, guard time GP and ascender Up excessively to sub-frame of uplink that wherein, the length of descender Dw and guard time GP is configurable.Above-mentioned three kinds of subframes are combined in a certain order and have been constituted the timeline structure.Wherein, all descenders in this timeline structure comprise descender in descending sub frame and the special subframe, the structure of forming is called the downgoing time line, all ascenders in this timeline structure comprise ascender in sub-frame of uplink and the special subframe, and the structure of composition is called up timeline.
Laying in the TDD cellular network of via node, after the downgoing time line of sub-district, via node place arrives via node through propagation delay, via node with this time of advent line be reference, shift to an earlier date a period of time on this basis, downgoing time line as via node, so that control data partly staggers in the descending sub frame in the via node descending sub frame when control data part and base station arrival relaying, thereby the control data of the UE that relaying can be served it sends, and can receive the base station again and give its control data.But, with the downgoing time line of via node in advance after, the control data that the via node emission may occur partly propagate when arriving the base station can and the up receiving unit of base station overlapping, still can produce interference.
Summary of the invention
In order to solve prior art problems, the embodiment of the invention provides a kind of method, base station and system of transmitting data.Described technical scheme is as follows:
A kind of method of transmitting data, described method comprises:
In the network of time division duplex, for the sub-district that lays via node, the base station of described sub-district is reference with the initial time line of described network, keep the ascender of the sub-frame of uplink of timeline of described sub-district and special subframe constant, reconfigure the length of guard time in the special subframe of timeline of described sub-district, and descending sub frame and the descender in the special subframe with the initial time line of described network are reference, postpone the descending sub frame that reconfigures the timeline behind the guard time of described sub-district and the descender in the special subframe, obtain the new timeline of described sub-district;
Transfer of data is carried out according to described new timeline and subscriber equipment or described via node in described base station.
A kind of base station be arranged in the network of time division duplex, and cloth is placed with via node in the sub-district of described base station services, and described base station comprises:
Processing module, the initial time line that is used for described network is reference, keep the ascender of the sub-frame of uplink of timeline of described sub-district and special subframe constant, reconfigure the length of guard time in the special subframe of timeline of described sub-district, and descending sub frame and the descender in the special subframe with the initial time line of described network are reference, postpone the descending sub frame that reconfigures the timeline behind the guard time of described sub-district and the descender in the special subframe, obtain the new timeline of described sub-district;
Sending module is used for carrying out transfer of data according to described new timeline and subscriber equipment or described via node.
A kind of system of transmitting data, described system is arranged in the network of time division duplex, comprising: base station and via node, and laid described via node in the sub-district of described base station services;
Described base station, the initial time line that is used for described network is reference, keep the ascender of the sub-frame of uplink of timeline of described sub-district and special subframe constant, reconfigure the length of guard time in the special subframe of timeline of described sub-district, and descending sub frame and the descender in the special subframe with the initial time line of described network are reference, postpone the descending sub frame that reconfigures the timeline behind the guard time of described sub-district and the descender in the special subframe, obtain the new timeline of described sub-district; Also be used for carrying out transfer of data according to described new timeline and subscriber equipment or described via node;
Described via node, be used for when the descender of the new timeline of described base station propagate arrive described via node after, with described descender time of advent be reference, the time of appointment in advance is as the position of the descender of the timeline of described via node, it is not overlapping to make that control data in the descending sub frame of control data part and the new timeline of described base station in the descending sub frame of timeline of described via node partly arrives behind the described via node, also is used for carrying out transfer of data according to the timeline after the fixed time in advance and described base station or subscriber equipment.
The embodiment of the invention is by carrying out the adjustment of timeline to the sub-district that lays via node, reached and eliminated the purpose of disturbing, need not the timeline of the sub-district that do not lay via node is adjusted, avoided the timeline of all sub-districts in the network is adjusted, greatly saved resource, avoid the wasting of resources, reduced maintenance cost and complexity.
Description of drawings
Fig. 1 is the timeline structural representation that the embodiment of the invention provides;
Fig. 2 is the transmission data method flow chart that the embodiment of the invention provides;
Fig. 3 is two sub-district timeline alignment schematic diagrames that the embodiment of the invention provides;
Fig. 4 is the detail flowchart of the transmission data method that provides of the embodiment of the invention;
Fig. 5 is the structural representation of each timeline in the transmission data method that provides of the embodiment of the invention;
Fig. 6 is the architecture of base station figure that the embodiment of the invention provides;
Fig. 7 is the transmission data system structure chart that the embodiment of the invention provides.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing.
Timeline in the embodiment of the invention comprises descending sub frame D, special subframe S and sub-frame of uplink U as shown in Figure 1.Wherein, a descending sub frame can be divided into two parts in time, and previous section is the control data part, is shown as the dash area of intersection among the figure, and aft section is the downlink service data part, is shown as the blank parts in the D among the figure.Special subframe can be divided into three parts, and previous section is descender Dw, comprises descending control data part and downlink service data part, and identical with the structure of descending sub frame, mid portion is a segment protect time GP, and aft section is ascender Up.When needing a special subframe during excessively to sub-frame of uplink from descending sub frame.The ascender length of special subframe is more fixing, but these those long the mutually adjusting that disappear of the length of descender and guard time, and both length sums cut its ascender length for the special subframe total length.Interval between any two sub-frame of uplink or the descending sub frame original position is the length of an integer subframe; Continuous descending sub frame comprises the descender of special subframe, between and sub-frame of uplink continuously, comprise the ascender of special subframe, between very close to each other.
Referring to Fig. 2, the embodiment of the invention provides a kind of sequential control method, comprising:
201: in the TDD network; for the sub-district that lays via node; the base station of this sub-district is reference with the initial time line of TDD network; keep the ascender of the sub-frame of uplink of timeline of this sub-district and special subframe constant; reconfigure the length of guard time in the special subframe of timeline of this sub-district; and descending sub frame and the descender in the special subframe with the initial time line of TDD network are reference; postpone the descending sub frame that reconfigures the timeline behind the guard time of this sub-district and the descender in the special subframe, obtain the new timeline of this sub-district.
Initial time line in the embodiment of the invention is meant, the identical timeline of being provided with for all sub-districts when the TDD network is initial.Configured the length of the guard time GP of special subframe in this initial time line.If do not lay via node in this TDD network, then the timeline of all sub-districts is absolute time alignment, promptly from natural time, in all sub-districts align in the border of each subframe, and or all be descending sub frame, perhaps all be sub-frame of uplink, perhaps all be special subframe.As shown in Figure 3, the timeline absolute time of sub-district A and sub-district B alignment.Otherwise, if sub-district A is an ascender, sub-district B is a descender in the identical moment, sub-district A will receive the terminal upstream data and the sub-district B base station down data of own sub-district simultaneously so, and sub-district A wants only is own cell terminal upstream data, and then the downlink data of sub-district B can constitute interference.
For the length configuration of guard time GP, generally by the size of each sub-district, perhaps equivalence ground is by the distance decision between the base station of two sub-district correspondences.Its basic demand is: when the downlink data emission of sub-district A, comprise the descender of descending sub frame and special subframe, when arriving sub-district B through propagation delay, can not receive with the upstream data of sub-district B, the ascender that comprises sub-frame of uplink and special subframe has overlappingly, otherwise interference is arranged.Suppose that distance is L (rice) between the base station of the base station of sub-district A and sub-district B, i.e. the about L/2 rice of each radius of society, the wireless electromagnetic velocity of wave propagation is C=3.0*10
8Meter per second, then guard time GP is at least L/C second.Generally in order to improve resource utilization, GP preferably can just satisfy does not have interference to get final product, so that special subframe descender Dw is long as far as possible, to be used for transmitting data.
202: transfer of data is carried out according to the above-mentioned new timeline that obtains and UE or via node in the base station of this sub-district, and wherein, this transmission comprises and sends and receive.
Said method is by carrying out the adjustment of timeline to the sub-district that lays via node, reached and eliminated the purpose of disturbing, and need not the timeline of the sub-district that do not lay via node is adjusted, avoided the timeline of all sub-districts in the network is adjusted, greatly saved resource, avoid the wasting of resources, reduced maintenance cost and complexity.
In the said method; particularly; 201 can realize in the following manner: reconfigure guard time GP and postpone the descending sub frame that reconfigures the timeline behind the guard time of this sub-district and the descender in the special subframe; when making the descender of the descending sub frame of new timeline of this sub-district and special subframe arrive neighbor cell by time delay; not overlapping with the ascender of the sub-frame of uplink of the timeline of this neighbor cell and special subframe; and when making the descender of the descending sub frame of timeline of neighbor cell and special subframe arrive this sub-district by time delay; not overlapping with the ascender of the sub-frame of uplink of the new timeline of this sub-district and special subframe; when also making descending control data part in the descending sub frame of timeline of via node arrive this sub-district, not overlapping with the ascender of the sub-frame of uplink of the new timeline of this sub-district and special subframe by time delay.
Referring to Fig. 4, the sequential control method that the embodiment of the invention provides can specifically comprise:
401: for the sub-district that lays via node in the TDD network; the base station of this sub-district is reference with the initial time line of TDD network; keep the ascender of the sub-frame of uplink of timeline of this sub-district and special subframe constant; reconfigure the length of guard time in the special subframe of timeline of this sub-district; and descending sub frame and the descender in the special subframe with the initial time line of TDD network are reference; postpone the descending sub frame that reconfigures the timeline behind the guard time of this sub-district and the descender in the special subframe; obtain the new timeline of this sub-district; when making the descender of the descending sub frame of new timeline of this sub-district and special subframe arrive neighbor cell by time delay; not overlapping with the ascender of the sub-frame of uplink of the timeline of this neighbor cell and special subframe; and when making the descender of the descending sub frame of timeline of neighbor cell and special subframe arrive this sub-district by time delay; not overlapping with the ascender of the sub-frame of uplink of the new timeline of this sub-district and special subframe; when also making descending control data part in the descending sub frame of timeline of via node arrive this sub-district, not overlapping with the ascender of the sub-frame of uplink of the new timeline of this sub-district and special subframe by time delay.
Wherein, the initial time line of TDD network is generally and sets in advance, and the length that the initial time line comprises the guard time GP of setting special subframe wherein is set.Particularly, can be referring to the TDD initial network timeline among Fig. 5, i.e. the timeline structure of first row.Usually, when initial with the TDD network in the timeline absolute time alignment of all sub-districts.
In the present embodiment, particularly, with the length prolongation of guard time GP; promptly shorten the length of descender Dw in the special subframe; and the length sum of GP and Dw is constant, as the timeline behind the cell re-configuration Dw/GP that lays via node among Fig. 5, promptly second the row the timeline structure.
Preferably, the length that disposes guard time GP in the special subframe of timeline of this sub-district is at least: (Tc+ τ-2*Tp+L/C) second; Wherein, Tc is the length of control data part in the descending sub frame of via node, and to be via node be transformed into change-over time of accepting state from transmit status to τ, and Tp be the propagation delay that via node is arrived in the base station of this sub-district.L is the spacing between the base station of the base station of a sub-district and another sub-district, and unit is a rice, and C is the wireless electromagnetic velocity of wave propagation, and C=3.0*10
8Meter per second.Time τ is the consideration for hardware, and via node can not be transformed into accepting state immediately from transmit status, needs certain change-over time, therefore, prolongs this time, reserves the corresponding time so that send out the receipts state exchange to via node.In the present embodiment, τ is the number greater than 0, and along with the development of technology, the τ value can reach 0, when τ is 0, still is applicable to the technical scheme in the embodiment of the invention.
The length that this step prolongs guard time is in order to prevent under the constant prerequisite of the ascender of special subframe and sub-frame of uplink, postpones the descender of descending sub frame and special subframe and causes the too short situation of GP to take place.
In the present embodiment, when the via node that lays when the sub-district is a plurality of, according to above-mentioned formula: (Tc+ τ-2*Tp) second, for each via node in these a plurality of via nodes calculates a time value, in all time values that obtain, select maximum, the descending sub frame and the descender in the special subframe of the timeline of this sub-district postponed this maximum at least.
Preferably, the descending sub frame and the descender in the special subframe that reconfigure the timeline behind the guard time that postpones this sub-district was at least (Tc+ τ-2*Tp) second; Wherein, Tc is the length of control data part in the descending sub frame of via node, and to be via node be transformed into change-over time of accepting state from transmit status to τ, and Tp be the propagation delay that via node is arrived in the base station of this sub-district.Particularly, can be with reference to the timeline structure behind the fixing up time delay downgoing time in the sub-district that lays via node among the figure 5, the i.e. structure of the third line timeline among the figure.Be not consider that with retardation the situation of Tp describes among the figure, this moment Tp=0, Up and U remain unchanged, each D, Dw all postpone backward, therefore, after first D, Dw among the figure postpones, shortened the length of GP in the special subframe, be shown as the GP of diagonal line hatches part left among the figure, correspondingly, after the D subframe delay that the U subframe is closelyed follow, its front is vacant to have gone out corresponding GP, be shown as the GP of diagonal line hatches part to the right among the figure, the length of GP before the length sum of two GP of place equals to postpone (GP in second row).
In the present embodiment; when the via node that lays when above-mentioned sub-district is a plurality of; according to above-mentioned formula: (calculated a time value for each via node in these a plurality of via nodes in Tc+ τ-2*Tp+L/C) second; in all time values that obtain, select maximum, the length of guard time in the special subframe that reconfigures the timeline behind the guard time of this sub-district is postponed this maximum at least.
402: transfer of data is carried out according to this new timeline and UE or via node in the base station of this sub-district, and this transmission comprises and sends and receive.
In the present embodiment, owing to laid via node in the above-mentioned sub-district, this via node also has the timeline of oneself as the sub-district of base station identity service.At this moment, its timeline can not be again and its base station, place timeline alignment, because for the base station at its place, it is the identity of UE.And, via node is in the descending sub frame of own sub-district, to finish the UE that control data in the own cell downlink subframe is partly sent to its service earlier, and then finish the reception base station and issue its data, the control data of via node part comprises control data part and business datum part, so need partly stagger with the control data of base station.Therefore, further, said method can also comprise:
403: when the descender of the new timeline of the base station of above-mentioned sub-district propagate arrive described via node after, via node is reference with this descender time of advent, the time of appointment in advance is as the position of the descender of the timeline of via node, obtain the new timeline of via node, it is not overlapping to make that control data in the descending sub frame of control data part and the new timeline of base station in the descending sub frame of timeline of via node partly arrives behind the via node, further, via node carries out transfer of data according to oneself new timeline and above-mentioned base station and UE, and this transmission comprises and receives and send.
Particularly, with reference to figure 5, the timeline structure of fourth line is the above-mentioned base station that lays the sub-district of via node, after new timeline transmission data, this new timeline arrives the result behind the via node, owing in transmission course, have time delay, therefore, can prolong a period of time backward after this new timeline arrives.Fifth line timeline structure among the figure is after via node shifts to an earlier date descender, the new timeline that obtains, because via node is reference with new timeline descender time of advent of base station, therefore, as can be seen from the figure, the new timeline of fourth line base station arrives the result behind the via node in the figure, and the new timeline of fifth line via node has shifted to an earlier date a period of time among the figure.Make control data part in the descending sub frame of timeline of via node in advance by this, not overlapping with the control data part in the descending sub frame of the timeline of base station.
In the present embodiment, application scenarios can also be LTE (Long Term Evolution, the 3GPP Long Term Evolution)/LTE-A (LongTerm Evolution Advanced, senior Long Term Evolution) TDD network, in this TDD network, the length of a subframe is 1 millisecond, and is made up of 14 OFDM (Orthogonal Frequency Division Multiplexing, OFDM) symbol.Wherein, the value of the Dw of special subframe, GP and Up is specially an integer symbol lengths.In addition, the subframe control data partial-length of via node reception base station data is 1 or 2 symbols.Suppose that all via nodes in the sub-district are used for receiving that control data part maximum length is k (k=1 in the subframe of base station data, 2) individual symbol, and the base station spacing of two sub-districts is a L rice in this TDD network, then preferably, the GP total length that this sub-district reconfigures is at least k symbol lengths+τ+L/C second, and wherein, τ is via node is transformed into accepting state from transmit status change-over time, C is the wireless electromagnetic velocity of wave propagation, and C=3.0*10
8Meter per second.
The said method that present embodiment provides is by carrying out the adjustment of timeline to the sub-district that lays via node, reached and eliminated the purpose of disturbing, need not the timeline of the sub-district that do not lay via node is adjusted, avoided the timeline of all sub-districts in the network is adjusted, greatly save resource, avoided the wasting of resources, reduced maintenance cost and complexity, simple to operate, realize easily.For the sub-district that does not lay via node, need not to adjust the timeline of this sub-district, the timeline of the sub-district that does not have via node is not affected, thereby these sub-districts do not have the wasting of resources, and whole network operation complexity reduce.Can prevent under the constant prerequisite of the ascender of special subframe and sub-frame of uplink by the length that prolongs GP, prolong the descender of descending sub frame and special subframe and cause the too short situation of GP to take place.The sub-district makes the control data of the descending sub frame that via node sends partly propagate when arriving the base station by postponing the descender of descending sub frame and special subframe, not can with the up receiving unit overlaid of base station, disturb thereby avoid producing.Via node with descender in advance after, make control data part in the descending sub frame of timeline of via node, not overlapping with the control data part in the descending sub frame of the timeline of base station, avoid producing and disturb.
Referring to Fig. 6, the embodiment of the invention also provides a kind of base station, is arranged in the TDD network, and cloth is placed with via node in the sub-district of this base station services, and this base station comprises:
In the present embodiment, under first kind of implementation, processing module 601 can be used for:
The descending sub frame that reconfigures the timeline behind the guard time of this sub-district and the descender in the special subframe are postponed to be (Tc+ τ-2*Tp) second at least; And/or,
The length that disposes guard time in the special subframe of timeline of this sub-district is at least: (Tc+ τ-2*Tp+L/C) second;
Wherein, Tc is the length of control data part in the descending sub frame of via node, τ is via node is transformed into accepting state from transmit status change-over time, Tp is the propagation delay of the base station of this sub-district to via node, L is the spacing between the base station of the base station of a sub-district and another sub-district, unit is a rice, and C is the wireless electromagnetic velocity of wave propagation, and C=3.0*10
8Meter per second.
In the present embodiment, under second kind of implementation, processing module 601 can be used for:
When the via node that lays when this sub-district is a plurality of, according to (Tc+ τ-2*Tp) be that each via node calculates a time value second, in all time values that obtain, select maximum, the descending sub frame and the descender in the special subframe that reconfigure the timeline behind the guard time of this sub-district postponed this maximum at least; And/or,
When the via node that lays when this sub-district is a plurality of, according to (Tc+ τ-2*Tp+L/C) be that each via node calculates a time value second, in all time values that obtain, select maximum, the length of guard time in the special subframe of the timeline of this sub-district is postponed this maximum at least;
Wherein, Tc is the length of control data part in the descending sub frame of via node, τ is via node is transformed into accepting state from transmit status change-over time, Tp is the propagation delay of the base station of this sub-district to via node, L is the spacing between the base station of the base station of a sub-district and another sub-district, unit is a rice, and C is the wireless electromagnetic velocity of wave propagation, and C=3.0*10
8Meter per second.
In the present embodiment; the initial time line that processing module 601 specifically is used for the TDD network is reference; keep the ascender of the sub-frame of uplink of timeline of this sub-district and special subframe constant; reconfigure the length of guard time in the special subframe of timeline of this sub-district; and descending sub frame and the descender in the special subframe with the initial time line of TDD network are reference; postpone the descending sub frame that reconfigures the timeline behind the guard time of this sub-district and the descender in the special subframe; obtain the new timeline of this sub-district; when making the descender of the descending sub frame of new timeline of this sub-district and special subframe arrive neighbor cell by time delay; not overlapping with the ascender of the sub-frame of uplink of the timeline of this neighbor cell and special subframe; and when making the descender of the descending sub frame of timeline of neighbor cell and special subframe arrive this sub-district by time delay; not overlapping with the ascender of the sub-frame of uplink of the new timeline of this sub-district and special subframe; when also making descending control data part in the descending sub frame of timeline of via node arrive this sub-district, not overlapping with the ascender of the sub-frame of uplink of the new timeline of this sub-district and special subframe by time delay.
The above-mentioned base station that present embodiment provides is by carrying out the adjustment of timeline to the sub-district that lays via node, reached and eliminated the purpose of disturbing, need not the timeline of the sub-district that do not lay via node is adjusted, avoided the timeline of all sub-districts in the network is adjusted, greatly save resource, avoided the wasting of resources, reduced maintenance cost and complexity, simple to operate, realize easily.For the sub-district that does not lay via node, need not to adjust the timeline of this sub-district, the timeline of the sub-district that does not have via node is not affected, thereby these sub-districts do not have the wasting of resources, and whole network operation complexity reduce.Can prevent under the constant prerequisite of the ascender of special subframe and sub-frame of uplink by the length that prolongs GP, prolong the descender of descending sub frame and special subframe and cause the too short situation of GP to take place.The sub-district makes the control data of the descending sub frame that via node sends partly propagate when arriving the base station by postponing the descender of descending sub frame and special subframe, not can with the up receiving unit overlaid of base station, disturb thereby avoid producing.
Referring to Fig. 7, the embodiment of the invention also provides a kind of system of transmitting data, comprising: base station 701 and via node 702;
Via node 702, be used for network at TDD, when the descender of the new timeline of base station 701 propagate reach via node 702 after, with this descender time of advent be reference, the time of appointment in advance is as the position of the descender of the timeline of via node 702, make control data part in the descending sub frame of timeline of via node 702, partly arrive behind the via node not overlappingly with control data in the descending sub frame of the new timeline of base station 701, also be used for carrying out transfer of data according to the timeline after the fixed time in advance and base station 701 or UE.
In the present embodiment, above-mentioned transmission comprises reception and sends.
In the present embodiment; particularly; base station 701 is used for the network at TDD; for the sub-district that lays via node 702; initial time line with the TDD network is reference; keep the ascender of the sub-frame of uplink of timeline of this sub-district and special subframe constant; reconfigure the length of guard time in the special subframe of timeline of this sub-district; and descending sub frame and the descender in the special subframe with the initial time line of TDD network are reference; postpone the descending sub frame that reconfigures the timeline behind the guard time of this sub-district and the descender in the special subframe; obtain the new timeline of sub-district; when making the descender of the descending sub frame of new timeline of this sub-district and special subframe arrive neighbor cell by time delay; not overlapping with the ascender of the sub-frame of uplink of the timeline of this neighbor cell and special subframe; and when making the descender of the descending sub frame of timeline of neighbor cell and special subframe arrive this sub-district by time delay; not overlapping with the ascender of the sub-frame of uplink of the new timeline of this sub-district and special subframe; when also making descending control data part in the descending sub frame of timeline of via node 702 arrive this sub-district, not overlapping with the ascender of the sub-frame of uplink of the new timeline of this sub-district and special subframe by time delay.
The said system that present embodiment provides is by carrying out the adjustment of timeline to the sub-district that lays via node, reached and eliminated the purpose of disturbing, need not the timeline of the sub-district that do not lay via node is adjusted, avoided the timeline of all sub-districts in the network is adjusted, greatly save resource, avoided the wasting of resources, reduced maintenance cost and complexity, simple to operate, realize easily.For the sub-district that does not lay via node, need not to adjust the timeline of this sub-district, the timeline of the sub-district that does not have via node is not affected, thereby these sub-districts do not have the wasting of resources, and whole network operation complexity reduce.Can prevent under the constant prerequisite of the ascender of special subframe and sub-frame of uplink by the length that prolongs GP, prolong the descender of descending sub frame and special subframe and cause the too short situation of GP to take place.The sub-district makes the control data of the descending sub frame that via node sends partly propagate when arriving the base station by postponing the descender of descending sub frame and special subframe, not can with the up receiving unit overlaid of base station, disturb thereby avoid producing.Via node with descender in advance after, make control data part in the descending sub frame of timeline of via node, not overlapping with the control data part in the descending sub frame of the timeline of base station, avoid producing and disturb.
Need to prove at last, one of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method, be to instruct relevant hardware to finish by computer program, described program can be stored in the computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (ROM) or stores memory body (RAM) etc. at random.
Each functional unit in the embodiment of the invention can be integrated in the processing module, also can be that the independent physics in each unit exists, and also can be integrated in the module two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, also can adopt the form of software function module to realize.If described integrated module realizes with the form of software function module and during as independently production marketing or use, also can be stored in the computer read/write memory medium.The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.Above-mentioned each device or system can carry out the method among the correlation method embodiment.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a method of transmitting data is characterized in that, described method comprises:
In the network of time division duplex, for the sub-district that lays via node, the base station of described sub-district is reference with the initial time line of described network, keep the ascender of the sub-frame of uplink of timeline of described sub-district and special subframe constant, reconfigure the length of guard time in the special subframe of timeline of described sub-district, and descending sub frame and the descender in the special subframe with the initial time line of described network are reference, postpone the descending sub frame that reconfigures the timeline behind the guard time of described sub-district and the descender in the special subframe, obtain the new timeline of described sub-district;
Transfer of data is carried out according to described new timeline and subscriber equipment or described via node in described base station.
2. method according to claim 1 is characterized in that, postpones the descending sub frame that reconfigures the timeline behind the guard time of described sub-district and the descender in the special subframe, is specially:
Postpone the descending sub frame that reconfigures the timeline behind the guard time of described sub-district and the descender in the special subframe at least: (Tc+ τ-2*Tp) second;
Wherein, Tc is the length of control data part in the descending sub frame of described via node, and to be described via node be transformed into change-over time of accepting state from transmit status to τ, and Tp is the propagation delay of the base station of described sub-district to described via node.
3. method according to claim 2; it is characterized in that; when the via node that lays when described sub-district is a plurality of; according to described (Tc+ τ-2*Tp) be respectively each via node second to calculate a time value; select maximum in all time values that obtain, the descending sub frame and the descender in the special subframe that reconfigure the timeline behind the guard time of described sub-district postpone described maximum at least.
4. method according to claim 1 is characterized in that, disposes the length of guard time in the special subframe of timeline of described sub-district, is specially:
The length that disposes guard time in the special subframe of timeline of described sub-district is at least: (Tc+ τ-2*Tp+L/C) second;
Wherein, Tc is the length of control data part in the descending sub frame of described via node, τ is described via node is transformed into accepting state from transmit status change-over time, Tp is the propagation delay of the base station of described sub-district to described via node, L is the spacing between the base station of the base station of a sub-district and another sub-district, unit is a rice, and C is the wireless electromagnetic velocity of wave propagation, and C=3.0*10
8Meter per second.
5. method according to claim 4; it is characterized in that; when the via node that lays when described sub-district is a plurality of; (be time value of each via node calculating in Tc+ τ-2*Tp+L/C) second according to described; select maximum in all time values that obtain, the length of guard time postpones described maximum at least in the special subframe of the timeline of described sub-district.
6. according to the described method of arbitrary claim in the claim 1 to 5; it is characterized in that; the base station of described sub-district is reference with the initial time line of described network; keep the ascender of the sub-frame of uplink of timeline of described sub-district and special subframe constant; reconfigure the length of guard time in the special subframe of timeline of described sub-district; and descending sub frame and the descender in the special subframe with the initial time line of described network are reference; postpone the descending sub frame that reconfigures the timeline behind the guard time of described sub-district and the descender in the special subframe; obtain the new timeline of described sub-district, be specially:
The base station of described sub-district is reference with the initial time line of described network; keep the ascender of the sub-frame of uplink of timeline of described sub-district and special subframe constant; reconfigure the length of guard time in the special subframe of timeline of described sub-district; and descending sub frame and the descender in the special subframe with the initial time line of described network are reference; postpone the descending sub frame that reconfigures the timeline behind the guard time of described sub-district and the descender in the special subframe; obtain the new timeline of described sub-district; when making the descender of the descending sub frame of new timeline of described sub-district and special subframe arrive neighbor cell by time delay; not overlapping with the ascender of the sub-frame of uplink of the timeline of this neighbor cell and special subframe; and when making the descender of the descending sub frame of timeline of neighbor cell and special subframe arrive described sub-district by time delay; not overlapping with the ascender of the sub-frame of uplink of the new timeline of described sub-district and special subframe; when also making descending control data part in the descending sub frame of timeline of described via node arrive described sub-district, not overlapping with the ascender of the sub-frame of uplink of the new timeline of described sub-district and special subframe by time delay.
7. a base station is characterized in that, is arranged in the network of time division duplex, and cloth is placed with via node in the sub-district of described base station services, and described base station comprises:
Processing module, the initial time line that is used for described network is reference, keep the ascender of the sub-frame of uplink of timeline of described sub-district and special subframe constant, reconfigure the length of guard time in the special subframe of timeline of described sub-district, and descending sub frame and the descender in the special subframe with the initial time line of described network are reference, postpone the descending sub frame that reconfigures the timeline behind the guard time of described sub-district and the descender in the special subframe, obtain the new timeline of described sub-district;
Sending module is used for carrying out transfer of data according to described new timeline and subscriber equipment or described via node.
8. base station according to claim 7 is characterized in that, described processing module is used for:
The descending sub frame that reconfigures the timeline behind the guard time of described sub-district and the descender in the special subframe are postponed to be (Tc+ τ-2*Tp) second at least; And/or,
The length that disposes guard time in the special subframe of timeline of described sub-district is at least: (Tc+ τ-2*Tp+L/C) second;
Wherein, Tc is the length of control data part in the descending sub frame of described via node, τ is described via node is transformed into accepting state from transmit status change-over time, Tp is the propagation delay of the base station of described sub-district to described via node, L is the spacing between the base station of the base station of a sub-district and another sub-district, unit is a rice, and C is the wireless electromagnetic velocity of wave propagation, and C=3.0*10
8Meter per second.
9. base station according to claim 7 is characterized in that, described processing module is used for:
When the via node that lays when described sub-district is a plurality of, according to (Tc+ τ-2*Tp) be that each via node calculates a time value second, in all time values that obtain, select maximum, the descending sub frame and the descender in the special subframe that reconfigure the timeline behind the guard time of described sub-district postponed described maximum at least; And/or,
When the via node that lays when described sub-district is a plurality of, according to (Tc+ τ-2*Tp+L/C) be that each via node calculates a time value second, in all time values that obtain, select maximum, the length of guard time in the special subframe of the timeline of described sub-district is postponed described maximum at least;
Wherein, Tc is the length of control data part in the descending sub frame of described via node, τ is described via node is transformed into accepting state from transmit status change-over time, Tp is the propagation delay of the base station of described sub-district to described via node, L is the spacing between the base station of the base station of a sub-district and another sub-district, unit is a rice, and C is the wireless electromagnetic velocity of wave propagation, and C=3.0*10
8Meter per second.
10. base station according to claim 7; it is characterized in that; the initial time line that described processing module specifically is used for described network is reference; keep the ascender of the sub-frame of uplink of timeline of described sub-district and special subframe constant; reconfigure the length of guard time in the special subframe of timeline of described sub-district; and descending sub frame and the descender in the special subframe with the initial time line of described network are reference; postpone the descending sub frame that reconfigures the timeline behind the guard time of described sub-district and the descender in the special subframe; obtain the new timeline of described sub-district; when making the descender of the descending sub frame of new timeline of described sub-district and special subframe arrive neighbor cell by time delay; not overlapping with the ascender of the sub-frame of uplink of the timeline of this neighbor cell and special subframe; and when making the descender of the descending sub frame of timeline of neighbor cell and special subframe arrive described sub-district by time delay; not overlapping with the ascender of the sub-frame of uplink of the new timeline of described sub-district and special subframe; when also making descending control data part in the descending sub frame of timeline of described via node arrive described sub-district, not overlapping with the ascender of the sub-frame of uplink of the new timeline of described sub-district and special subframe by time delay.
11. a system of transmitting data is characterized in that, described system is arranged in the network of time division duplex, comprising: base station and via node, and laid described via node in the sub-district of described base station services;
Described base station, the initial time line that is used for described network is reference, keep the ascender of the sub-frame of uplink of timeline of described sub-district and special subframe constant, reconfigure the length of guard time in the special subframe of timeline of described sub-district, and descending sub frame and the descender in the special subframe with the initial time line of described network are reference, postpone the descending sub frame that reconfigures the timeline behind the guard time of described sub-district and the descender in the special subframe, obtain the new timeline of described sub-district; Also be used for carrying out transfer of data according to described new timeline and subscriber equipment or described via node;
Described via node, be used for when the descender of the new timeline of described base station propagate arrive described via node after, with described descender time of advent be reference, the time of appointment in advance is as the position of the descender of the timeline of described via node, it is not overlapping to make that control data in the descending sub frame of control data part and the new timeline of described base station in the descending sub frame of timeline of described via node partly arrives behind the described via node, also is used for carrying out transfer of data according to the timeline after the fixed time in advance and described base station or subscriber equipment.
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| CN 201010105145 CN102137500B (en) | 2010-01-26 | 2010-01-26 | Method, base station and system for data transmission |
| PCT/CN2011/070626 WO2011091748A1 (en) | 2010-01-26 | 2011-01-26 | Method, enhanced node base and system for transmitting data |
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| CN 201010105145 CN102137500B (en) | 2010-01-26 | 2010-01-26 | Method, base station and system for data transmission |
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| CN102137500B (en) | 2013-10-02 |
| WO2011091748A1 (en) | 2011-08-04 |
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