CN101753197A - Method for configurating downlink relay subframes in LTE system - Google Patents
Method for configurating downlink relay subframes in LTE system Download PDFInfo
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Abstract
The invention discloses a method for configurating downlink relay subframes in an LTE system to make UE know which subframes are the downlink relay subframes. The method comprises that: a network element on the network side and the user equipment UE appoint in advance that wireless subframes which are allowed to be configurated into the downlink relay subframes in a group of wireless frames are represented by a plurality of indicating bits, and the network element and the UE record the corresponding relationship of each indicating bit and the wireless subframes; the network element sends configuration information of the downlink relay subframes to a cell by a signaling, and the configuration information is used for indicating which indicating bit or indicating bits are configurated; and after receiving the singling, the UE of the cell determines the positions of the downlink relay subframes in the group of wireless frames according to the configuration information and the stored corresponding relationship.
Description
Technical field
The present invention relates to field of wireless communication, particularly in LTE (Long Term Evolution, Long Term Evolution) system, the method for configurating downlink relay sub-frame.
Background technology
2005,3GPP (3rd Generation Partnership Project, third generation partner program) started the working group that LTE (Long Term evolution Long Term Evolution) studies, the next generation network of the 3.9G (improved 3G) of research and the evolution of design 3G (Third Generation) Moblie technology.
At present,, realize mending blind effect, introduced Relay (relaying) technology among the LTE-Advanced in 3GPP (LTE enhancement techniques), as shown in Figure 1 in order to improve the covering gain of cell boarder.Among the figure, an eNB (evolved Node B, improved Node B) the both UE for this sub-district provides service, and several Relay under also controlling with it carry out transfer of data and Signalling exchange.Same, each Relay both with this eNB communication, also provide service for the UE under this Relay.Consider high efficiency of spectrum utilization, eNB uses identical frequency resource with Relay to its service UE link to the Relay link.Therefore shown in Fig. 2 a, on a down link, certain/some subframe on this eNB when sending data for certain Relay under its control, this Relay this/can only receive data on these subframes from eNB, can not send signal at this down link to the UE that this Relay served simultaneously, otherwise will produce stronger interference.On a up link, shown in Fig. 2 b, same reason, when a Relay certain/when receiving the data from the UE of its service on some subframe, Relay this/can not send upward signal to eNB simultaneously on these subframes.Therefore, certain/may occur without any downstream signal on some subframe or clean culture control domain part signal is only arranged, from UE, this/these subframes just as " cavity " one by one (hole), we are referred to as to transmit subframe, do not send any downstream signal on these subframes; Similarly some sub-frame of uplink of relay and eNB can not receive the upward signal of UE.
Down link certain/some subframe on, network element relay need receive from its control network element, as: (Gateway GPRS Support Node, full name is: the GPRS gateway is supported node for eNB, GGSN.GPRS is exactly General Packet Radio Service, that is: general packet radio service), signal and the data of RNC (radio network controller, radio network controller), the present invention is example with eNB.This/these subframes on, network element Relay is because need to receive data from its control network element eNB, so can not send data to the sub-district under its control simultaneously.In the present invention, these are used for Relay and are called relay sub-frame (relay subframe) with the special subframe that its control network element carries out information interaction, relay sub-frame comprises uplink relay subframe and downlink relay sub-frame, wherein: uplink relay subframe is used for Relay and controls network element to it, as: eNB, or GGSN, or RNC transmission response message, this moment, UE can not send upstream data to relay; Downlink relay sub-frame is used for relay and receives the data of controlling network element from it, and this moment, UE can not receive the downlink data of relay.
For LTE FDD (Frequency Division Duplex, Frequency Division Duplexing (FDD)), so because have synchronizing information can not be configured to downlink relay sub-frame on each subframe # 0 and the #5, so and subframe # 4 and #9 be used for preferentially sending beep-page message and can not be configured to downlink relay sub-frame, (this paper is defined as FDD scene 1) in this case is among the LTE FDD, each radio frames can be configured to downlink relay sub-frame 6 at most, be specially b={#1, #2, #3, #6, #7, #8}, as shown in Figure 3.Among the figure, 32 radio frames were arranged in the repetition period,
Expression downlink relay frame,
Represent non-downlink relay frame; 10 wireless sub-frames are arranged in the radio frames, wherein,
Expression can not be configured to the wireless sub-frame of downlink relay sub-frame,
Expression allows to be configured to the wireless sub-frame of downlink relay sub-frame.
If change present paging configuration, promptly at first adopt subframe # 0 and #5 to send paging and inferior # 4 and the #9 of preferentially adopting sends paging, (this paper is defined as FDD scene 2) then in this case, subframe # 4 and #9 can be configured to downlink relay sub-frame, and among the LTE FDD, each radio frames can be configured to downlink relay sub-frame 8 at most, be specially b={#1, #2, #3, #4, #6, #7, #8, #9}.
For LTE TDD (Time Division Duplex, time division duplex), because subframe # 0, #1, #5 has disposed synchronizing signal on the #6, so these 4 subframes all can not be configured to downlink relay sub-frame, sub-frame of uplink can not be configured to downlink relay sub-frame simultaneously, so have at least sub-frame of uplink # 2 can not be configured to downlink relay sub-frame, (this paper is defined as TDD scene 1) in this case is among the LTE TDD, each radio frames can be configured to downlink relay sub-frame 5 at most, be specially b={#3, #4, #7, #8, #9}.
Because subframe # 0 and #5 preferentially send beep-page message among the LTE TDD, so if subframe # 1 and #6 do not consider the influence of synchronizing signal and are defined as in the time of can being configured to downlink relay sub-frame, sub-frame of uplink can not be configured to downlink relay sub-frame simultaneously, so have at least sub-frame of uplink # 2 can not be configured to downlink relay sub-frame, (this paper is defined as TDD scene 2) then in this case, subframe # 1 and #6 can be configured to downlink relay sub-frame, among the LTE TDD, each radio frames can be configured to downlink relay sub-frame 7 at most, is specially b={#1, #3, #4, #6, #7, #8, #9}.
During the problem that exists at present, the UE of sub-district does not also know which descending sub frame has been configured to downlink relay sub-frame, cause UE can on downlink relay sub-frame, receive data or measurement, can think that less than signal this cell quality is poor, thereby cause the disconnected and misoperation of erroneous judgement if UE measures.
Summary of the invention
The technical problem to be solved in the present invention provides the method for configurating downlink relay sub-frame in a kind of LTE system, makes UE know which subframe is a downlink relay sub-frame.
For solving the problems of the technologies described above, the invention provides the method for configurating downlink relay sub-frame in a kind of LTE system, comprise: network side network element and user equipment (UE) agreement are in advance represented the wireless sub-frame that allows to be configured to downlink relay sub-frame in one group of radio frames by several indicating bits, and described network element and UE write down the corresponding relation of each indicating bit and described wireless sub-frame; Described network element sends in the sub-district by the configuration information of signaling with downlink relay sub-frame, and described configuration information is used to indicate which or which indicating bit to be configured; After the UE of described sub-district receives described signaling, determine the position of downlink relay sub-frame in this group radio frames according to the described corresponding relation of described configuration information and preservation.
Further, described network element and UE arrange the configuration information of radio frames group in advance, and each radio frames group is downlink relay frame group, and the configuration of downlink relay sub-frame is identical in each downlink relay frame group; Described network element only comprises the positional information of downlink relay sub-frame in the configuration information of the downlink relay sub-frame of sub-district transmission, after UE receives described signaling, know that according to the positional information of described downlink relay sub-frame which or which indicating bit is configured, be the relative position of downlink relay sub-frame in the radio frames group, described UE determines the actual location of downlink relay sub-frame in this group radio frames again according to the corresponding relation of described indicating bit of preserving and wireless sub-frame.
Further, the configuration information of the radio frames group of described network element and UE agreement: a repetition period is 1 radio frames group, and the repetition period comprises 32 continuous radio frames when being 320ms in the radio frames group, and described indicating bit has 192 or 256.
Further, the configuration information of the radio frames group of described network element and UE agreement: the repetition period of a 320ms is 8 radio frames groups, has 4 radio frames, indicating bit to have 24 or 32 in each radio frames group.
Further, the positional information that comprises downlink relay sub-frame in the positional information of downlink relay frame group and the group in the configuration information of the downlink relay sub-frame that described network element sends to the sub-district, wherein: the positional information of described downlink relay frame group is used to locate the position of downlink relay frame group, has promptly disposed the position of the radio frames group of downlink relay sub-frame; The positional information of described downlink relay sub-frame is used to indicate which or which indicating bit to be configured, i.e. the relative position of downlink relay sub-frame in the downlink relay frame group of location; After UE receives described signaling, according to the positional information of described downlink relay frame group location downlink relay frame group, determine the actual location of downlink relay sub-frame in this radio frames group again according to the corresponding relation of the described indicating bit of the positional information of described downlink relay sub-frame and preservation and wireless sub-frame.
Further, the number of the indicating bit of agreement is determined by the number of radio frames in the radio frames group: the number * 6 of radio frames in the number of indicating bit=radio frames group, perhaps the number * 8 of radio frames in the number of indicating bit=radio frames group.
Further, the positional information of described downlink relay frame group comprises one or more in the following parameter: the number of radio frames, the cycle of radio frames group, the skew of radio frames group continuously in the radio frames group.
Further, when the positional information of described downlink relay frame group comprises in the radio frames group continuously cycle of number, radio frames group of radio frames and skew, UE determines the position of downlink relay frame group according to following formula: (SFN div N) mod M=offset, and wherein: SFN represents to allow the sequence number as the radio frames group of downlink relay sub-frame group; N represents the number of the continuous radio frames that comprises in each radio frames group; M represents the cycle of downlink relay frame group, repetition period of N*M=; The skew of Offset radio frames group in the repetition period, offset=0, then not skew of expression, offset=1 represents to be offset 1 radio frames group, by that analogy.
Further, described network side network element is one of following network element: relaying Relay, improved Node B eNB, GPRS gateway are supported node GGSN, radio network controller (RNC).
Further, described several indicating bits are continuous indicating bits.
Adopt method of the present invention, network side has disposed downlink relay sub-frame by system broadcast message, the present invention simultaneously adopts the collocation method of cycle and other parameter can adopt considerably less bit to realize 320ms configurating downlink relay sub-frame expeditiously on the cycle, after terminal is known the position of downlink relay sub-frame, can avoid on this downlink relay sub-frame, receiving data and/or measurement.
Description of drawings
Fig. 1 is at the schematic diagram of the borderline Relay of eNB in the prior art;
Fig. 2 a is eNB and the Relay of its control and the schematic diagram that UE carries out downgoing communication in the prior art;
Fig. 2 b is eNB and the Relay of its control and the schematic diagram that UE carries out uplink communication in the prior art;
Fig. 3 is the distribution schematic diagram of interior downlink relay frame of LTE FDD one-period and subframe;
Fig. 4 is the distribution schematic diagram of radio frames and subframe in the one-period among the present invention.
Embodiment
In the LTE system, the network element of network side (as Relay) arranges to represent the wireless sub-frame that allows to be configured to downlink relay sub-frame in one group of radio frames by several continuous indicating bits with UE in advance, in Fig. 3, in LTE FDD scene 1,6 continuous bit{0,1,2 ..5}, that is: bit0, bit1 ... bit5, the corresponding respectively wireless sub-frame { #1 that allows to be configured to downlink relay sub-frame, #2, #3, #6, #7, #8}; In LTETDD scene 1,6 continuous bit{0,1,2 ..5}, that is: bit0, bit1 ... bit4, the corresponding respectively wireless sub-frame that allows to be configured to downlink relay sub-frame # 3, and #6, #7, #8, #9}, bit5 is useless only in order to align with FDD.In other embodiments, also can adopt discontinuous indicating bit to represent the wireless sub-frame that allows to be configured to downlink relay sub-frame in the radio frames group.The benefit that adopts continuous indicating bit is to save the bit that is used to indicate.With LTE FDD scene 1 is example, and bit indicates if adopt one to one, then needs at least 9 bit, but wherein has 3 (bit0, bit4, bit5) but not use, thereby causes the waste of resource.Described network side and UE write down the corresponding relation of each indicating bit and described wireless sub-frame; Relay sends in the sub-district by the configuration information of signaling with downlink relay sub-frame, described configuration information be used for indicating which or which represent the indicating bit of wireless sub-frame to be configured (be the indicating bit representative wireless sub-frame which or which be configured to downlink relay sub-frame), after the UE of this sub-district receives described signaling, determine the position of downlink relay sub-frame in this group radio frames according to the described corresponding relation of described configuration information and preservation in advance.
UE in the time will receiving data and/or measure, only carries out on non-downlink relay sub-frame after knowing which wireless sub-frame of this sub-district is downlink relay sub-frame, that is to say, does not receive operations such as data and/or measurement on downlink relay sub-frame.
The signaling that configuration information adopted that Relay sends downlink relay sub-frame can be a high-level signaling, also can be MAC (Media access control, medium access control) signaling, or physical layer signaling etc.Can RRC (Radio resource control in high-level signaling, Radio Resource control) layer signaling or system broadcast message, be example in the present invention with the system broadcast message, especially, can carry by in the following message blocks in the system broadcast message any one: host system message block (MIB, master informationblock), System information block 1 (SIB1, system information block type1), System information block 2 (SIB2, system information block type 2), .... System information block 11 (SIB11, systeminformation block type 11) etc.
This paper is that example describes with the configurating downlink relay sub-frame.The length of one-period is 320ms for example, and this cycle can refer to: the repetition period, the modification cycle, dispatching cycle etc., as shown in Figure 4, each radio frames 10ms, each wireless sub-frame (abbreviation subframe) 1ms has 32 radio frames, radio frames is numbered a={#0, #1 ... #31}, each radio frames has 10 subframes, 10 subframes in each radio frames be numbered b={#0, #1, #2 ... #9} has 320 subframes, being numbered of all subframes in 320ms cycle: (#a, #b), wherein a represents radio frame number, value is a=0,1,2 .., 31, b represents the subframe numbering in each radio frames, and value is b=0,1, ..., 9, then a 320ms is in the cycle, and 320 wireless sub-frame number consecutivelies are:
Herein, be example with the scene 1 of LTE FDD and TDD, and for the uniformity of FDD and TDD, all adopt 6bit, as: { bit0, bit1, bit2, bit3, bit4, bit5} represents to be configured to downlink relay sub-frame, and particularly: LTE FDD corresponds to b={#1 from lowest order bit0 to highest order bit5, #2, #3, #6, #7, #8}; LTE TDD corresponds to b={#3 from lowest order bit0 to highest order bit5, #4, #7, #8, #9, #Not used}, last bit, that is: bit5, useless only be for the FDD alignment, that is:
Relay and UE arrange to represent the wireless sub-frame that allows to be configured to downlink relay sub-frame with which bit (indicating bit) in advance, bit0-bit5 as mentioned above, perhaps also can adopt other bit, like this in a radio frames, only just can indicate the employed downlink relay sub-frame of Relay, relatively save resource with 6 bit.
When LTE FDD scene 2 and LTE TDD scene 2, then can utilize 8 bit to represent the wireless sub-frame that allows to be configured to downlink relay sub-frame.
Relay and UE can arrange the configuration information of radio frames group in advance, number as the radio frames that comprises in the radio frames group, it perhaps also can be cycle of radio frames group etc., and the configuration of downlink relay sub-frame is identical in each radio frames group, as arranging 32 radio frames is that a repetition period is one group, and perhaps arranging 4 radio frames is one group.At this moment, Relay only comprises the positional information (for example being bitmap or location parameter) of downlink relay sub-frame in the configuration information of the downlink relay sub-frame of sub-district transmission.Relay and UE can not arrange in advance yet, this moment the downlink relay sub-frame that issues of Relay configuration information in comprise the positional information of downlink relay sub-frame in the positional information of downlink relay frame group and the group, described downlink relay frame group is meant the radio frames group at the radio frames place that includes downlink relay sub-frame, and the radio frames that wherein contains downlink relay sub-frame can be described as repeater frame.Positional information can be bitmap or location parameter.If location parameter, then UE should be known the cycle of downlink relay sub-frame at least, can UE be known by prior agreement or by the mode that message is informed, other parameters then can be carried as required.Concrete indicating means is participated in following examples.
Embodiment 1:
The radio frames number that comprises in radio frames group of network element of network side (as: relay) and the prior agreement of UE, Relay sends to the positional information that configuration information in the signaling of sub-district comprises downlink relay sub-frame, be illustrated in the repetition period, the wireless sub-frame that disposes the representative of which or which indicating bit is a downlink relay sub-frame, positional information adopts location parameter to represent, location parameter can be any a group in the following several groups of parameters: the cycle, cycle and skew, cycle and length, cycle and skew and length.Terminal is a downlink relay sub-frame according to the wireless sub-frame that these calculation of parameter go out the representative of which or which indicating bit.
Downlink relay sub-frame can dispose a plurality of continuously, as: { #1, #2}, { #3, the #4} of TDD of FDD.When disposing a plurality of downlink relay sub-frame, be configured by length parameter.
On a repetition period (it is 320ms that present embodiment is got repetition period length, i.e. 320 subframes), it is downlink relay sub-frame that relay notifies which sub-frame configuration of this sub-district by system broadcast message;
In the present embodiment, Relay and UE repetition period of agreement are 320ms, comprise 32 radio frames in this repetition period.All 32 radio frames are constituted a radio frames group, that is: in a repetition period radio frames group is only arranged.In cycle, allow to be configured to the wireless sub-frame of downlink relay sub-frame at a 320ms, its sequence number is decided to be SFN-subframe approximately, for: { a, b}, wherein a={0,1,2 ... 31}, b={bit0, bit1, bit2, bit3, bit4, bit5}, that is: total 32*6=192 subframe can be configured to downlink relay sub-frame.That is to say that the indicating bit that needs 192 bit indicates the wireless sub-frame that is allowed to be configured to downlink relay sub-frame.If each radio frames adopts 8 bit, then need 256 subframes altogether.In order, from first subframe to a last wireless sub-frame:
SFN-subframe＝{#0，#1，....#190，#191}
Because relay receives its control network element, during as the data of: eNB, may need to retransmit, so usually, having disposed several continuous downlink relay sub-frame needs just can dispose after 8 subframes at interval more again.
● when the parameter of configurating downlink relay sub-frame only had the cycle, the subframe that satisfies following formula was a downlink relay sub-frame:
SFN-subframe mod period=0 (formula 1)
Wherein: the wireless sub-frame that SFN-subframe represents to can be configured to downlink relay sub-frame is the sequence number of relay sub-frame, i.e. the sequence number of indicating bit;
Period represents the cycle of downlink relay sub-frame
In order to guarantee the downlink relay sub-frame interval of minimum 8ms, the period value is more than or equal to 8, promptly more than or equal to 8 subframes.
● when the parameter of configurating downlink relay sub-frame has cycle and skew, satisfy following formula
Subframe is a downlink relay sub-frame:
SFN-subframe mod period=offset (formula 2)
Wherein: the wireless sub-frame that SFN-subframe represents to can be configured to downlink relay sub-frame is the sequence number of relay sub-frame;
Period represents the cycle of downlink relay sub-frame;
Offset represents the skew of downlink relay sub-frame in the cycle;
In order to guarantee the downlink relay sub-frame interval of minimum 8ms, the period value is more than or equal to 8, promptly more than or equal to 8 subframes.
● when the parameter of configurating downlink relay sub-frame had cycle and length, the subframe that satisfies following formula was a downlink relay sub-frame:
SFN-subframe mod period+ (0 ... length)=0 (formula 3)
Wherein: the wireless sub-frame that SFN-subframe represents to can be configured to downlink relay sub-frame is the sequence number of relay sub-frame;
Period represents the cycle of downlink relay sub-frame
Length represents the length of downlink relay sub-frame, and length is 0 expression subframe only, length is 1 to be lenth=1, and then expression satisfies 0 and 1, represent two continuous subframes, length is 2 to be length=2, and then expression satisfies 0,1,2, represent three continuous subframes, by that analogy;
In order to guarantee the downlink relay sub-frame interval of minimum 8ms, the period value is more than or equal to 8, promptly more than or equal to 8 subframes.
● when the parameter of configurating downlink relay sub-frame had cycle, skew and length, the subframe that satisfies following formula was a downlink relay sub-frame:
SFN-subframe mod period=offset+ (0 ... length) (formula 4)
Wherein: the wireless sub-frame that SFN-subframe represents to can be configured to downlink relay sub-frame is the sequence number of relay sub-frame;
Period represents the cycle of downlink relay sub-frame;
Offset represents the skew of downlink relay sub-frame in the cycle;
Length represents the length of downlink relay sub-frame, and length is 0 expression subframe only, length is 1 to be lenth=1, and then expression satisfies 0 and 1, represent two continuous subframes, length is 2 to be length=2, and then expression satisfies 0,1,2, represent three continuous subframes, by that analogy;
In order to guarantee the downlink relay sub-frame interval of minimum 8ms, the period value is more than or equal to 8, promptly more than or equal to 8 subframes.
Except the employing location parameter is represented, can also pass through the position of the mode indicating downlink relay sub-frame of bitmap assignment.
Embodiment 2:
All radio frames in the whole repetition period are divided into several radio frames groups of equal length, comprise several radio frames in each radio frames group, each radio frames group all is that the configuration of downlink relay frame group and downlink relay sub-frame is all identical.The continuous radio frames number that comprises in radio frames group of network element of network side (as: relay) and the prior agreement of UE, Relay sends to the positional information that configuration information in the signaling of sub-district comprises downlink relay sub-frame, be illustrated in interior which indicating bit of a repetition period and be configured the actual relative position that is illustrated in downlink relay sub-frame in this radio frames group.The method that to dispose this sub-district subframe be downlink relay sub-frame is:
Present embodiment is an example with the repetition period of 320ms with by system broadcast message notice UE still.
Because relay receives its control network element, during as the data of: eNB, may need to retransmit, so, usually, several continuous downlink relay sub-frame need just can dispose after 8 subframes at interval more again, again because a radio frames has 10 subframes, so getting 8 and 10 least common multiple is 40 subframes, promptly 4 continuous radio frames are a radio frames group; Simultaneously because a radio frames has 6 subframes can be configured to downlink relay sub-frame in scene 1, so in the cycle of a 320ms, 4 continuous radio frames are combined the configurating downlink relay sub-frame, on 4 continuous radio frames, have 24 subframes (6 (subframe) *, 4 (radio frames)) to be allowed to be configured to downlink relay sub-frame so at most.
Present embodiment is that 320ms is an example with the repetition period, and 4 continuous radio frames are constituted one group, in the cycle of such 320ms, 8 such radio frames groups is arranged.In the present embodiment, stipulate that in advance each radio frames group is downlink relay frame group, a 320ms has 8 downlink relay frame groups in the cycle.That is to say: contain the several downlink relay sub-frame in each downlink relay frame group (4 continuous radio frames), each radio frames group has 24 downlink relay sub-frame at most.That is to say that the indicating bit that needs 24 bit indicates the wireless sub-frame that is allowed to be configured to downlink relay sub-frame.
The subframe that can be configured to downlink relay sub-frame in these 4 continuous radio frames is sorted in order, that is: from last configurable downlink relay sub-frame of 4 radio frames of first configurable downlink relay sub-frame to the of first radio frames.
N configurable downlink relay sub-frame is: SFN_subframe#n={a, and b},
Wherein: a=(0,3), expression is from 4 radio frames of the 1st radio frames to the;
B=(bit0, bit1 ..., bit5), { #1, #2, #3, #6, #7, { #3, #4, #7, #8, #9, the #Not used} of #8} and TDD of corresponding FDD;
The sequence number of 24 configurable downlink relay sub-frame (SFN_subframe) in such 4 continuous radio frames, promptly the relay sub-frame sequence number is:
In the present embodiment in each radio frames group the configurating downlink relay sub-frame can adopt following method:
● Relay and UE fix on approximately in advance and have 8 radio frames groups in the repetition period, each radio frames group comprises 4 continuous radio frames, and described radio frames group all is the downlink relay sub-frame group, that is: comprise containing the identical downlink relay sub-frame of configuration in several continuous radio frames and each radio frames; This moment, Relay only need indicate the position of the downlink relay sub-frame in each repeater frame group to get final product to UE.Indicate the method for downlink relay sub-frame position in each radio frames group to be: in the signaling that sends, to adopt the mode of the bitmap (bit mapping) of 24 bit (bit) to come the indicating downlink relay sub-frame.
Because each radio frames group comprises 4 radio frames, totally 40 subframes, and as can be known according to preamble, each radio frames has 6 subframes can be configured to downlink relay sub-frame at most, so each downlink relay frame group has 24 subframes can be configured to downlink relay sub-frame at most, so can adopt the mode of the bitmap assignment of 24 bit to indicate part subframe wherein is downlink relay sub-frame, be to represent that non-downlink relay sub-frame, assignment were to represent downlink relay sub-frame at 1 o'clock at 0 o'clock such as: assignment.The mapping relations of the bitmap of 24 bit are:
In other embodiments, for LTE FDD scene 2 and LTE TDD scene 2, then need to indicate with 32 bitmap (8 subframes of 4 radio frames *).
● the another kind of method of downlink relay sub-frame position of indicating in the radio frames group is: several location parameters (one or more in cycle, skew and the length) that comprise configurating downlink relay sub-frame in each radio frames group in the signaling that sends.
A, when the location parameter of configurating downlink relay sub-frame has cycle, skew and length, the subframe that then satisfies following formula is a downlink relay sub-frame:
SFN-subframe mod period '=offset '+(0 ... length ') (formula 5)
Wherein: SFN-subframe represents 24 sequence numbers that can be configured to downlink relay sub-frame in 4 continuous radio frames, from first subframe to a last subframe, i.e. relay sub-frame sequence number:
In the cycle of Period ' expression downlink relay sub-frame, promptly every what SFN-subframe of interval can be configured to downlink relay sub-frame once more, and in order to guarantee the downlink relay sub-frame interval of minimum 8ms, the period value is more than or equal to 8, and smaller or equal to 24; Usually, in order to save byte overhead, the value in cycle can be configured to one of several groups simply: 8,10,12,14,16,18,20,22,24}, 8,12,16,20,24} or 8,16,24}, but the same time can only select the one-period value.If do not do this configuration, promptly any one integer can be done periodic quantity among the 8-24, and then overhead bit is big.
The skew of Offset ' expression downlink relay sub-frame in the cycle, i.e. the deviant that begins from first subframe that can be configured to downlink relay sub-frame, offset '=0, then not skew of expression, the offset span be (0,1,2 ..., 23);
What continuous downlink relay sub-frame are the length of the downlink relay sub-frame that Length ' expression is continuous promptly have, span (0,1, ..., 23), length '=0, expression is a downlink relay sub-frame only, length '=1, and expression has 2 continuous downlink relay sub-frame.Usually the length value is 1 or 3 just enough, that is: continuous 24 downlink relay sub-frame, can be with 1 bit{0,1} or 2 bit{0,1,2,3} represents length, and wherein: the former represents 1 downlink relay sub-frame and 2 continuous downlink relay sub-frame respectively, and the latter represents 1 downlink relay sub-frame and 2 respectively, 3,4 continuous downlink relay sub-frame.
B, when agreement adopts the fixing cycle, the location parameter of configurating downlink relay sub-frame has skew and length, the subframe that then satisfies following formula is a downlink relay sub-frame:
When adopting the fixing cycle to be 8 (in order to guarantee the downlink relay sub-frame interval of minimum 8ms), promptly 8 SFN-subframe in every interval dispose one or continuous a plurality of downlink relay sub-frame in each radio frames group.
SFN-subframe mod 8 (or16,24)=offset '+(0 ... length ') (formula 6)
(or16,24) in the above-mentioned formula bracket are meant and adopt the fixing cycle: 16 or 24.
C, when agreement adopts fixing length, the location parameter of configurating downlink relay sub-frame has cycle and skew, the subframe that then satisfies following formula is a downlink relay sub-frame:
When adopting fixing length to be 0, promptly dispose the subframe that a downlink relay sub-frame satisfies following formula is downlink relay sub-frame at every turn: SFN-subframe mod period=offset '
When the fixing length value 1,2 or 3 of each employing, that is: dispose 2,3,4 downlink relay sub-frame continuously, the subframe that then satisfies following formula is a downlink relay sub-frame:
SFN-subframe mod period=offset '+(0 ... 1 (or2,3)) (formula 7)
D, when agreement adopts fixing length and cycle, the location parameter of configurating downlink relay sub-frame has skew, the subframe that then satisfies following formula is a downlink relay sub-frame:
Cycle is disposed a downlink relay sub-frame for fixing 8 or 16,24 at every turn:
SFN-subframe?mod?8(or?16，24)＝offset’
Cycle is for fixing 8 or 16,24,, dispose 2,3 or 4 continuous downlink relay sub-frame at every turn:
SFN-subframe mod 8 (or 16,24)=offset '+(0 ... 1 (or2,3)) (formula 8)
Above-mentioned execution mode only is an example, except several examples of carrying parameter of mentioning, can also adopt other modes of carrying parameter herein, and as carrying the example of parameter among the embodiment 1, perhaps agreement adopts fixing skew etc.In a word, no matter be to carry parameter, still arrange partial parameters and carry partial parameters, still arrange all parameters, principle is to make UE can know the position of downlink relay sub-frame according to the parameter of carrying in the configuration information.
Embodiment 3:
In the present embodiment, though also all radio frames in the whole repetition period are divided into several radio frames groups of equal length, but network element of network side (as: relay) and UE do not arrange the number of radio frames in the radio frames group, but indicate by the configuration information of the downlink relay sub-frame in the signaling that sends to the sub-district, and in the present embodiment, be not that each radio frames group all is a downlink relay frame group, have only the radio frames group that has disposed downlink relay sub-frame to be only downlink relay frame group.In the present embodiment, the configuration information of downlink relay sub-frame comprises the positional information of downlink relay sub-frame in the positional information of downlink relay frame group and the group, wherein: the positional information of downlink relay frame group is used to locate the position of downlink relay frame group, promptly disposed the position of the radio frames group of downlink relay sub-frame, and the positional information of downlink relay sub-frame is used in reference to the relative position of downlink relay sub-frame in the downlink relay frame group that is shown in the location.The configuration information that can set the downlink relay sub-frame in all downlink relay frame groups is identical.
In the present embodiment, the number of the indicating bit of agreement is by the number decision of radio frames in the radio frames group, the number * 6 of radio frames in the number of indicating bit=radio frames group, perhaps the number * 8 of radio frames in the number of indicating bit=radio frames group in advance.
● locate the method for downlink relay frame group by location parameter:
A, when the parameter that comprises the radio frames group in the signaling of network element configuration: the number of radio frames, the cycle and the skew of radio frames group continuously in the radio frames group, the radio frames group that satisfies following formula is a downlink relay frame group:
(SFN?div?N)mod?M＝offset
Wherein: SFN represents to be configured to the sequence number of the radio frames group of downlink relay sub-frame group;
N represents what continuous radio frames are each radio frames group comprise;
M represents the cycle of radio frames group, comprises the radio frames group of what equal length in 1 to repetition period that is:; Repetition period of N*M=;
(SFN div N) expression is divided by the aliquot part of N, i.e. merchant;
Offset represents the skew of downlink relay frame group in the repetition period, and promptly from first radio frames group, being offset what radio frames groups is downlink relay frame group, offset=0, then not skew of expression, offset=1 represents to be offset 1 radio frames group, by that analogy.
B, when the agreement continuous radio frames number be that (fixed value also can be 2 to fixed value 4,3), i.e. expression: each radio frames group comprises 4 continuous radio frames, and the location parameter of radio frames group comprises: cycle and skew, the radio frames group that satisfies following formula are downlink relay frame group:
(SFN?div?4)mod?M＝offset
When N fixedly equals 4, that is: in the cycle of a 320ms, have 32 radio frames, each radio frames group comprises 4 continuous radio frames, then has 8 groups.N=4 then, the M value be (1,2 ... 8), the offset value be (0,1,2 ... 7), offset=0 is then for from first radio frames group; Offset=1 is 1 radio frames group of skew.
In embodiment 1, be equivalent to N=32, promptly comprise 32 radio frames.
C, begin to calculate from first radio frames group when agreement is fixing, and the number of radio frames is that (fixed value also can be 2 to fixed value 4 continuously, 3), i.e. expression: each radio frames group comprises 4 continuous radio frames, the location parameter of radio frames group is in the signaling of network element configuration: in the cycle, the radio frames group that satisfies following formula is a downlink relay frame group:
(SFN?div?4)mod?M＝0
When N fixedly equals 4, and offset is fixed as 0 (always from first radio frames group), in the cycle of a 320ms, has 32 radio frames that is:, and each radio frames group comprises 4 continuous radio frames, then has 8 groups.N=4 then, the M span be (1,2 ... 8) be can be 1,2 in the cycle ..., or 8.
It is disclosed that the parameter that configuration information comprised of downlink radio frame group is not limited to above-mentioned execution mode, also can carry other parameters based on above-mentioned thought, as long as make UE can locate the radio frames group according to the parameter of carrying in the configuration information.
● locate the method for the relative position of downlink relay sub-frame in the downlink relay frame group by positional information:
The mode of the bitmap (bit mapping) of A, 24 bit of employing (bit)
Because each radio frames group comprises 4 radio frames, totally 40 subframes, and as can be known according to preamble, each subframe has 6 subframes can be configured to downlink relay sub-frame at most, so each downlink relay frame group has 24 subframes can be configured to downlink relay sub-frame at most, so can adopt the bitmap mode of 24 bit.
B, indicate the position of downlink relay sub-frame in each downlink relay frame group by location parameter (one or more in cycle, skew and the length):
1) when the location parameter of configurating downlink relay sub-frame has cycle, skew and length, the subframe that then satisfies following formula is a downlink relay sub-frame:
SFN-subframe mod period '=offset '+(0 ... length ') (formula 9)
Wherein: SFN_subframe represents 24 sequence numbers that can be configured to downlink relay sub-frame in 4 continuous radio frames, from first subframe to a last subframe, i.e. downlink relay sub-frame sequence number:
In the cycle of Period ' expression downlink relay sub-frame, promptly every what SFN-subframe of interval can be configured to downlink relay sub-frame once more, and in order to guarantee the downlink relay sub-frame interval of minimum 8ms, the period value is more than or equal to 8, and smaller or equal to 24; Usually, the value in cycle can dispose simply 8,10,12,14,16,18,20,22,24}, 8,12,16,20,24}, or 8,16,24}.
Offset ' expression downlink relay sub-frame is in the skew of downlink relay sub-frame in the cycle, promptly can be configured to the deviant that the subframe for downlink relay sub-frame begins, offset '=0 from first, then not skew of expression, the offset span is (0,1,2 ..., 23);
The length of the downlink relay sub-frame that Length ' expression is continuous, span (0,1 ..., 23), length '=0, expression is a downlink relay sub-frame only, length '=1, expression has 2 continuous downlink relay sub-frame.Usually the length value is 1 or 3 just enough, that is: continuous 24 downlink relay sub-frame, can be with 1 bit{0,1} or 2 bit{0,1,2,3} represents length, and wherein: the former represents 1 downlink relay sub-frame and 2 continuous downlink relay sub-frame respectively, and the latter represents 1 downlink relay sub-frame and 2 respectively, 3,4 continuous downlink relay sub-frame.
2) when agreement adopts the fixing cycle, the location parameter of configurating downlink relay sub-frame has skew and length, and the subframe that then satisfies following formula is a downlink relay sub-frame:
When adopting the fixing cycle to be 8 (in order to guarantee the downlink relay sub-frame interval of minimum 8ms), promptly 8 SFN-subframe in every interval dispose one or continuous a plurality of downlink relay sub-frame in each radio frames group.
SFN-subframe mod 8 (or 16,24)=offset '+(0 ... length ') (formula 10)
(or16,24) in the bracket, what expression was adopted is the fixed cycle: 16 or 24.
3) when agreement adopted fixing length, the location parameter of configurating downlink relay sub-frame had cycle and skew, and the subframe that then satisfies following formula is a downlink relay sub-frame:
When adopting fixing length to be 0, promptly dispose the subframe that a downlink relay sub-frame satisfies following formula is downlink relay sub-frame at every turn: SFN-subframe mod period=offset '
When the fixing length value 1,2 or 3 of each employing, that is: dispose 2,3 or 4 downlink relay sub-frame continuously at every turn, the subframe that then satisfies following formula is a downlink relay sub-frame:
SFN-subframe mod period=offset '+(0 ... 1 (or2,3)) (formula 11)
4) when agreement adopted fixing length and cycle, the location parameter of configurating downlink relay sub-frame had skew, and the subframe that then satisfies following formula is a downlink relay sub-frame:
Cycle is disposed a downlink relay sub-frame for fixing 8 or 16,24 at every turn:
SFN-subframe?mod?8(or?16，24)＝offset’
(formula 12)
Cycle is for fixing 8 or 16,24,, dispose 2,3 or 4 continuous downlink relay sub-frame at every turn:
SFN-subframe mod 8 (or16,24)=offset '+(0 ..1 (or2,3)) (formula 13)
Above-mentioned execution mode only is an example, except several examples of carrying parameter of mentioning, can also adopt other modes of carrying parameter herein, and as carrying the example of parameter among the embodiment 1, perhaps agreement adopts fixing skew etc.In a word, no matter be to carry parameter, still arrange partial parameters and carry partial parameters, still arrange all parameters, principle is to make UE can know the position of downlink relay sub-frame according to the parameter of carrying in the configuration information.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
The network side network element can also be existing other network elements, as eNB, GGSN or RNC etc. except Relay.
Claims (23)
1. the method for configurating downlink relay sub-frame in the LTE system is characterized in that,
Network side network element and user equipment (UE) agreement are in advance represented the wireless sub-frame that allows to be configured to downlink relay sub-frame in one group of radio frames by several indicating bits, and described network element and UE write down the corresponding relation of each indicating bit and described wireless sub-frame; Described network element sends in the sub-district by the configuration information of signaling with downlink relay sub-frame, and described configuration information is used to indicate which or which indicating bit to be configured; After the UE of described sub-district receives described signaling, determine the position of downlink relay sub-frame in this group radio frames according to the described corresponding relation of described configuration information and preservation.
2. the method for claim 1 is characterized in that,
Described network element and UE arrange the configuration information of radio frames group in advance, and each radio frames group is downlink relay frame group, and the configuration of downlink relay sub-frame is identical in each downlink relay frame group; Described network element only comprises the positional information of downlink relay sub-frame in the configuration information of the downlink relay sub-frame of sub-district transmission, after UE receives described signaling, know that according to the positional information of described downlink relay sub-frame which or which indicating bit is configured, be the relative position of downlink relay sub-frame in the radio frames group, described UE determines the actual location of downlink relay sub-frame in this group radio frames again according to the corresponding relation of described indicating bit of preserving and wireless sub-frame.
3. method as claimed in claim 2 is characterized in that,
The configuration information of the radio frames group of described network element and UE agreement: a repetition period is 1 radio frames group, and the repetition period comprises 32 continuous radio frames when being 320ms in the radio frames group, and described indicating bit has 192 or 256.
4. method as claimed in claim 2 is characterized in that,
The configuration information of the radio frames group of described network element and UE agreement: the repetition period of a 320ms is 8 radio frames groups, has 4 radio frames, indicating bit to have 24 or 32 in each radio frames group.
5. the method for claim 1 is characterized in that,
The positional information that comprises downlink relay sub-frame in the positional information of downlink relay frame group and the group in the configuration information of the downlink relay sub-frame that described network element sends to the sub-district, wherein: the positional information of described downlink relay frame group is used to locate the position of downlink relay frame group, has promptly disposed the position of the radio frames group of downlink relay sub-frame; The positional information of described downlink relay sub-frame is used to indicate which or which indicating bit to be configured, i.e. the relative position of downlink relay sub-frame in the downlink relay frame group of location;
After UE receives described signaling, according to the positional information of described downlink relay frame group location downlink relay frame group, determine the actual location of downlink relay sub-frame in this radio frames group again according to the corresponding relation of the described indicating bit of the positional information of described downlink relay sub-frame and preservation and wireless sub-frame.
6. method as claimed in claim 5 is characterized in that,
The number of the indicating bit of agreement is determined by the number of radio frames in the radio frames group:
The number * 6 of radio frames in the number of indicating bit=radio frames group, perhaps
The number * 8 of radio frames in the number of indicating bit=radio frames group.
7. method as claimed in claim 5 is characterized in that,
The positional information of described downlink relay frame group comprises one or more in the following parameter: the number of radio frames, the cycle of radio frames group, the skew of radio frames group continuously in the radio frames group.
8. method as claimed in claim 7 is characterized in that,
When the positional information of described downlink relay frame group comprised in the radio frames group continuously cycle of number, radio frames group of radio frames and skew, UE determined the position of downlink relay frame group according to following formula:
(SFN div N) mod M=offset, wherein:
SFN represents to allow the sequence number as the radio frames group of downlink relay sub-frame group;
N represents the number of the continuous radio frames that comprises in each radio frames group;
M represents the cycle of downlink relay frame group, repetition period of N*M=;
The skew of Offset radio frames group in the repetition period, offset=0, then not skew of expression, offset=1 represents to be offset 1 radio frames group, by that analogy.
9. method as claimed in claim 8 is characterized in that,
Described network element and UE arrange the value of N in advance, only comprise the cycle and the skew of radio frames group in the positional information of then described downlink relay frame group.
10. method as claimed in claim 9 is characterized in that,
Described network element and UE arrange the value of offset in advance, only comprise the cycle of radio frames group in the positional information of then described downlink relay frame group.
11. as the described method of arbitrary claim among the claim 2-10, it is characterized in that,
The positional information of described downlink relay sub-frame is bitmap or location parameter, and which indicating bit described bitmap directly indicates be configured by the mode of assignment; Described location parameter comprises one or more in the following parameter: the cycle of downlink relay sub-frame, skew and length.
12. method as claimed in claim 11 is characterized in that,
When the location parameter of described downlink relay sub-frame only comprised the cycle of downlink relay sub-frame, UE determined the relative position of downlink relay sub-frame according to following formula:
SFN-subframe mod period=0, wherein:
SFN-subframe represents the sequence number of the indicating bit that is configured;
Period represents the cycle of downlink relay sub-frame.
13. method as claimed in claim 11 is characterized in that,
The location parameter of described downlink relay sub-frame comprises cycle and when skew of downlink relay sub-frame, and UE determines the relative position of downlink relay sub-frame according to following formula:
SFN-subframe mod period=offset, wherein:
SFN-subframe represents the sequence number of the indicating bit that is configured;
Period represents the cycle of downlink relay sub-frame;
Offset represents the skew of downlink relay sub-frame in the cycle.
14. method as claimed in claim 11 is characterized in that,
When the location parameter of described downlink relay sub-frame comprised cycle of downlink relay sub-frame and length, UE determined the relative position of downlink relay sub-frame according to following formula:
SFN-subframe mod period+ (0 ... length)=0, wherein:
SFN-subframe represents the sequence number of the indicating bit that is configured;
Period represents the cycle of downlink relay sub-frame;
Length represents the length of downlink relay sub-frame, and length=0 represents only to dispose a downlink relay sub-frame, and length=1 represents to have 2 continuous downlink relay sub-frame, by that analogy.
15. method as claimed in claim 11 is characterized in that,
When the location parameter of described downlink relay sub-frame comprised the cycle, skew of downlink relay sub-frame and length, UE determined the relative position of downlink relay sub-frame according to following formula:
SFN-subframe mod period=offset+ (0 ... length), wherein:
SFN-subframe represents the sequence number of the indicating bit that is configured;
Period represents the cycle of downlink relay sub-frame;
Offset represents the skew of downlink relay sub-frame in the cycle;
Length represents the length of downlink relay sub-frame, and Length=0 represents only to dispose a downlink relay sub-frame, and length=1 represents to have 2 continuous downlink relay sub-frame, by that analogy.
16. method as claimed in claim 15 is characterized in that,
When described network element and UE agreement length are fixed value, then only comprise the cycle and the skew of downlink relay sub-frame in the location parameter of described downlink relay sub-frame, described Length is fixed as 0 or 1 or 3.
17. method as claimed in claim 15 is characterized in that,
When described network element and UE agreement period are fixed value, then only comprise the skew and the length of downlink relay sub-frame in the location parameter of described downlink relay sub-frame.
18. as the described method of arbitrary claim among the claim 12-17, it is characterized in that,
Described period value is more than or equal to 8, and smaller or equal to 24, described Period is configured to one of several groups: 8,10,12,14,16,18,20,22,24}, 8,12,16,20,24} or 8,16,24}, but can only select the one-period value simultaneously.
19. as claim 1,2 or 5 described methods, it is characterized in that,
After UE is known the position of downlink relay sub-frame in the sub-district, in the time will receiving data and/or measure, only on non-downlink relay sub-frame, carry out.
20. as claim 1,2 or 5 described methods, it is characterized in that,
Described signaling is high-level signaling or medium access control signaling or physical layer signaling.
21. method as claimed in claim 20 is characterized in that,
Described signaling is radio resource control layer signaling or the system broadcast message in the high-level signaling;
When adopting system broadcast message to carry the configuration information of downlink relay sub-frame, be to carry by in the following message blocks any one:
Host system message block MIB, System information block 1 SIB1, System information block 2 SIB2, System information block 3 SIB3, system message be 4 SIB4, System information block 5 SIB5, System information block 6 SIB6, System information block 7 SIB7, System information block 8 SIB8, System information block 9 SIB9, System information block 10SIB10, System information block 11 SIB11 certainly.
22. as the described method of arbitrary claim among claim 1-10, the 12-17, it is characterized in that,
Described network side network element is one of following network element: relaying Relay, improved Node B eNB, GPRS gateway are supported node GGSN, radio network controller (RNC).
23., it is characterized in that described several indicating bits are continuous indicating bits as the described method of arbitrary claim among claim 1-10, the 12-17.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012000183A1 (en) * | 2010-06-30 | 2012-01-05 | Nokia Corporation | Method and apparatus for coordinated un sub-frame configuration for lte-a relay |
| CN103108400A (en) * | 2013-01-29 | 2013-05-15 | 大唐移动通信设备有限公司 | Radio frame processing method and device |
| CN107113117A (en) * | 2015-04-17 | 2017-08-29 | 华为技术有限公司 | A kind of method, apparatus and system of feedback of the information |
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| CN101174873B (en) * | 2006-10-30 | 2011-08-10 | 华为技术有限公司 | Relay station equipment and communication forwarding method |
| CN101188816B (en) * | 2006-11-15 | 2011-06-15 | 华为技术有限公司 | Relay method, relay system and relay device |
| CN101184076B (en) * | 2007-12-18 | 2012-06-06 | 中兴通讯股份有限公司 | Multicast Single frequency network subframe structure in mobile broadband system and transmitting method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012000183A1 (en) * | 2010-06-30 | 2012-01-05 | Nokia Corporation | Method and apparatus for coordinated un sub-frame configuration for lte-a relay |
| CN103108400A (en) * | 2013-01-29 | 2013-05-15 | 大唐移动通信设备有限公司 | Radio frame processing method and device |
| CN103108400B (en) * | 2013-01-29 | 2015-09-09 | 大唐移动通信设备有限公司 | Radio frames processing method and device |
| CN107113117A (en) * | 2015-04-17 | 2017-08-29 | 华为技术有限公司 | A kind of method, apparatus and system of feedback of the information |
| CN107113117B (en) * | 2015-04-17 | 2021-04-20 | 华为技术有限公司 | Information feedback method, equipment and system |
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