CN101868027A - Configuration and sending method of uplink signal transmission resource, base station and user terminal - Google Patents
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Abstract
The invention provides a configuration and sending method of uplink signal transmission resource, a base station and a user terminal (UE). The base station configures resource corresponding to the uplink pilot time slot (UpPTS) with more than two of orthogonal frequency division multiplexing (OFDM) symbols to be uplink signal transmission resource, or configures N OFDM symbols in guard space (GP), which are adjacent to UpPTS and resource corresponding to UpPTS, to be uplink signal transmission resource, and informs the uplink signal transmission resource configuration information to UE through system broadcasting or high-level signaling, wherein N is an integer larger or equal to 1. The invention can meet the user requirement that more SRS resources are occupied in the multipoint cooperative transmission technology and solve the problem that the SRS resource is not enough.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly a kind of configuration of uplink signal transmission resource and sending method, base station and user terminal.
Background technology
The enhancement mode Long Term Evolution (LTE-A, LTE-Advanced) system is the evolution system of 3-G (Generation Three mobile communication system), it has introduced the service quality that the multi-point cooperative transmission technology improves Cell Edge User.The multi-point cooperative transmission technology is by the combined dispatching or the collaborative transmission of a plurality of sub-districts of separating on the geographical position, improve user's received signal quality, reduce the interference of minizone, thereby effectively improve power system capacity and edge customer spectrum efficiency.
In the multi-point cooperative transmission technology, user terminal (UE) is key factors that influence systematic function to the channel information of a plurality of sub-districts.On the one hand, up in the multi-point cooperative transmission technology united reception and need be dispatched and modulating-coding (MCS, Modulationand Coding Scheme) is selected to the up channel of many sub-districts according to UE; On the other hand, if UE can survey the up channel of a plurality of sub-districts, time division duplex (TDD, Time Division Duplex) has saved a large amount of UE feedback burdens just utilize up-downgoing channel reciprocity directly to obtain descending channel information in the system.For a UE who supports multi-point cooperative transmission, it need send out-hole run reference signal (SRS, SoundingReference Signal) channel detection is carried out in a plurality of sub-districts, take the SRS resource of a plurality of sub-districts, because the SRS resource that disposes in the existing protocol is at the LTE system, the user demand of multi-point cooperative transmission technology in the LTE-A system can not be satisfied, the scarcity of SRS resource may be caused.
Summary of the invention
In view of this, the invention provides a kind of configuration and sending method, base station and UE of uplink signal transmission resource,, solve the problem of SRS scarcity of resources so that satisfy the user demand of multi-point cooperative transmission technology in the LTE-A system.
A kind of collocation method of uplink signal transmission resource, this method comprises:
The base station is uplink signal transmission resource with the OFDM number of symbols greater than the resource distribution of 2 UpPTS correspondence, be uplink signal transmission resource perhaps with N the OFDM symbol of next-door neighbour UpPTS and the resource distribution of UpPTS correspondence among the GP, and the uplink signal transmission resource configuration information is notified to user terminal UE by system broadcasts or high-level signaling, wherein N is the integer more than or equal to 1.
A kind of method that sends upward signal, this method comprises:
UE is according to the uplink signal transmission resource configuration information in system broadcasts or the high-level signaling, on the resource of OFDM number of symbols greater than 2 UpPTS correspondence, perhaps sends upward signal on the resource of N the OFDM symbol of next-door neighbour UpPTS and UpPTS correspondence among the GP; Wherein N is the integer more than or equal to 1.
A kind of base station, this base station comprises: resource configuration unit and information transmitting unit;
Described resource configuration unit, being used for the OFDM number of symbols is uplink signal transmission resource greater than the resource distribution of 2 UpPTS correspondence, is uplink signal transmission resource with N the OFDM symbol of next-door neighbour UpPTS among the GP and the resource distribution of UpPTS correspondence perhaps;
Described information transmitting unit is used for the uplink signal transmission resource configuration information of described resource configuration unit is notified to UE by system broadcasts or high-level signaling, and wherein N is the integer more than or equal to 1.
A kind of UE, this UE comprises: information acquisition unit and signal transmitting unit;
Described information acquisition unit is used for obtaining the uplink signal transmission resource configuration information from system broadcasts or high-level signaling;
Described signal transmitting unit is used for according to described uplink signal transmission resource configuration information, on the resource of OFDM number of symbols greater than 2 UpPTS correspondence, perhaps sends upward signal on the resource of N the OFDM symbol of next-door neighbour UpPTS and UpPTS correspondence among the GP; Wherein N is the integer more than or equal to 1.
As can be seen from the above technical solutions, the present invention is by being uplink signal transmission resource with the OFDM number of symbols greater than the resource distribution of 2 UpPTS correspondence or being uplink signal transmission resource with N the OFDM sign resources of next-door neighbour UpPTS among the GP and the resource distribution of UpPTS correspondence, the uplink signal transmission resource configuration of the existing LTE system that compares can be disposed more uplink signal transmission resource by the present invention and is used for sending SRS in special subframe, thereby make UE on more uplink signal transmission resource, to send SRS, satisfy the user demand that takies more SRS resource in the LTE-A system in the multi-point cooperative transmission technology, solve the problem of SRS scarcity of resources.
Description of drawings
Fig. 1 is the second type frame structural representation in the LTE system;
(a) (b) (c) special time slot schematic diagram of providing for the embodiment of the invention one among Fig. 2;
The special time slot schematic diagram that Fig. 3 provides for the embodiment of the invention two;
The architecture of base station figure that Fig. 4 provides for the embodiment of the invention;
The UE structure chart that Fig. 5 provides for the embodiment of the invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
The collocation method of SRS resource provided by the invention mainly comprises: is uplink signal transmission resource with OFDM (OFDM) number of symbols greater than the resource distribution of 2 UpPTS correspondence, be uplink signal transmission resource perhaps with N the OFDM symbol of next-door neighbour UpPTS and the resource distribution of UpPTS correspondence among the GP, and the uplink signal transmission resource configuration information is notified to UE by system broadcasts or high-level signaling, wherein N is the integer more than or equal to 1.
Correspondingly, uplink signal sending method provided by the invention mainly comprises: UE is according to the uplink signal transmission resource configuration information in system broadcasts or the high-level signaling, in the resource of OFDM number of symbols, perhaps send upward signal on the resource of N OFDM symbol among the next-door neighbour UpPTS and UpPTS correspondence among the GP greater than 2 UpPTS correspondence.
Above-mentioned uplink signal transmission resource can be used to carry out the transmission of SRS, can certainly be used for the transmission of other upward signal.
In order to help the understanding of the present invention, at first the second type frame structure (FS2, Frame Structure Type 2) of LTE system is simply introduced.Fig. 1 is the second type frame structural representation in the LTE system, and as shown in Figure 1, the field that the radio frames of a 10ms is 5ms by two length is formed, the subframe that to comprise 5 length in each field be 1ms, 4 conventional subframes wherein, 1 special subframe.Special subframe comprises three special time slots: descending pilot frequency time slot (DwPTS), protection be (GP) and uplink pilot time slot (UpPTS) at interval.DwPTS is used to send downlink synchronous signal and user's business datum; GP is used to protect the up-downgoing data not interfere with each other, and depends on conditions such as radius of society; The SRS signal that relates among the present invention sends in UpPTS, and UpPTS also is used to send Physical Random Access Channel (PRACH) in addition.
As can see from Figure 1, the total length of three special time slots is fixed as 1ms, and length separately can be configured according to the actual needs of network, has 9 kinds of configurations in the existing standard, and as shown in table 1, wherein the length of UpPTS mostly is 2 OFDM symbols most.
Table 1
Row are described in detail said method provided by the invention for two example two respectively below.
Embodiment one, the new special subframe configuration of employing, the OFDM number of symbols of UpPTS is greater than 2, and correspondingly, the OFDM number of symbols that reduces DwPTS or GP is constant with the total length that keeps special subframe.
For example, the configuration of this new special subframe can be that special subframe configuration 5 is expanded and obtained, the OFDM number of symbols of UpPTS can be 4, correspondingly, the OFDM number of symbols of GP reduces 2, as shown in Figure 2, (a) among Fig. 2 is the special subframe configuration 5 in the existing protocol, the OFDM number of symbols of DwPTS is 3, and the OFDM number of symbols of GP is 9, and the OFDM number of symbols of UpPTS is 2.(b) among Fig. 2 is the configuration of new special subframe, and the resource of dash area is 2 OFDM symbols reducing resource as UpPTS among the figure from GP.Certainly, also can reduce the OFDM symbol among the DwPTS, as the resource among the UpPTS, shown in (c) among Fig. 2, wherein the resource of dash area is 2 OFDM symbols reducing from DwPTS resources as UpPTS.
Need to prove, in this new configuration, still need the length of GP to satisfy the requirement that the sub-district covers at least.
In this new configuration, be uplink signal transmission resource with the resource distribution of UpPTS correspondence.Because the PRACH resource may take the part of GP in existing protocol, therefore, in new configuration, between OFDM symbol that increases newly and PRACH resource, clash, can will keep the default time interval between the OFDM symbol that increase newly among the UpPTS and the original OFDM symbol.
In the present embodiment, OFDM symbol among the UpPTS of new configuration can adopt the CP configuration identical with uplink conventional subframe, if promptly uplink conventional subframe adopts conventional CP, then the OFDM symbol among the UpPTS also adopts conventional CP, if uplink conventional subframe adopts expansion CP, then the OFDM symbol among the UpPTS also adopts expansion CP.More preferably, reach better synchronous effect, can dispose the fixing expansion CP that adopts of UpPTS in order to guarantee UE.
Correspondingly, UE can adopt CP configuration identical with uplink conventional subframe or the fixing expansion CP that adopts to dispose in the UpPTS of new configuration.
Can notify new configuration to the UE that supports multi-point cooperative transmission in the LTE-A system, still,, can be respectively among the present invention notify different configurations the UE of difference in functionality because the UE of LTE R8 may not support the configuration that this is new.For example, can notify new configuration, the UE of LTE R8 be notified the configuration of existing protocol the UE that supports multi-point cooperative transmission.More preferably, in concrete selection of configuration process, the length of DwPTS is less than or equal to the length of the DwPTS in the configuration that the UE for multi-point cooperative transmission selects in the configuration of selecting for the UE of LTE R8.
By this embodiment one, UE can carry out the transmission of SRS on the resource of OFDM number of symbols greater than 1 UpPTS correspondence, can certainly carry out the transmission of other upward signal.
Embodiment two, still adopt the configuration of existing protocol, the resource of N OFDM symbol correspondence among the next-door neighbour UpPTS among the GP also is configured to uplink signal transmission resource.
More preferably, in order to guarantee that satisfying the sub-district covers requirement, above-mentioned N OFDM symbol among the present embodiment GP is N OFDM symbol except satisfying sub-district covering requirement among the GP, that is to say that other OFDM symbol except this N OFDM symbol among the GP still can satisfy the sub-district and cover requirement.
This N OFDM symbol is still the resource among the GP, just can be used for uplink signal transmissions, still the configuration 5 with special subframe is an example, as shown in Figure 3, dash area is 2 the OFDM symbols of next-door neighbour UpPTS among the GP, and these 2 OFDM symbols are configured to the transmission that uplink signal transmission resource is used for upward signal together with the resource of UpPTS correspondence.
Equally,, therefore, between above-mentioned N OFDM symbol and PRACH resource, clash, can will keep the default time interval between above-mentioned N OFDM symbol and the UpPTS because the PRACH resource may take the part of GP in existing protocol.
Therefore this configuration in the present embodiment can notify the UE of support multi-point cooperative transmission or the UE of LTE R8 owing to be the configuration of adopting former protocols having.
In this embodiment, the special subframe configuration information of the existing LTE system that adopts can be notified to the base station by system broadcasts or high-level signaling, wherein, the configuration information of N OFDM symbol can be notified to UE by the high-level signaling of extra definition, and the configuration information of this N OFDM symbol can be the number N of OFDM symbol and positional information etc.Perhaps, corresponding a kind of uplink signal transmission resource configuration of the configuration of each wireless sub-frame, it is the configuration information of N OFDM symbol, this corresponding relation of making an appointment, after by system broadcasts or high-level signaling the configuration information of special subframe being notified to UE, UE can determine corresponding uplink signal transmission resource configuration information by corresponding relation according to a preconcerted arrangement.
Above-mentioned N OFDM symbol among the GP can adopt the parameter identical with UpPTS, for example identical with the OFDM symbol employing among UpPTS CP configuration; Correspondingly, UE can adopt the processing identical with UpPTS on this N OFDM symbol, for example adopts the CP configuration identical with UpPTS to send upward signal.
Correspondingly, UE is close in GP when sending upward signal on the resource of N the OFDM symbol of UpPTS and UpPTS correspondence, adopts CP configuration identical with UpPTS or fixing the employing to expand CP and dispose.
Above-mentioned N OFDM symbol among the GP also can adopt the parameter different with UpPTS, for example disposes the fixing expansion CP that adopts of above-mentioned N OFDM symbol and reaches better synchronous effect to guarantee UE.Correspondingly, UE can send upward signal at the fixing expansion CP that adopts of this N OFDM symbol.
By this embodiment two, UE can be close in GP on the resource of N the OFDM symbol of UpPTS and UpPTS correspondence and send SRS, can certainly carry out the transmission of other upward signal.
More preferably, in above two embodiment, the influence between the neighbor cell is considered in the base station as far as possible for UE collocating uplink signal transmission resource the time, be specifically as follows: neighbor cell is that same UE adopts identical uplink signal transmission resource configuration as far as possible, thereby makes things convenient for UE to unite transmission.
More than be the detailed description that method provided by the present invention is carried out, below base station provided by the present invention and UE be described in detail.
The architecture of base station figure that Fig. 4 provides for the embodiment of the invention, as shown in Figure 4, this base station mainly comprises: resource configuration unit 401 and information transmitting unit 402.
More preferably, other OFDM symbol lengths except above-mentioned N OFDM symbol need satisfy the requirement that the sub-district covers among the GP.
Particularly, resource configuration unit 401 can adopt the expansion special subframe based on the special subframe configuration of existing LTE system, OFDM number of symbols with UpPTS in this expansion special subframe increases M, OFDM number of symbols with GP or DwPTS reduces M simultaneously, with the resource distribution of UpPTS correspondence is uplink signal transmission resource, and wherein M is the integer more than or equal to 1.
Accordingly, information transmitting unit 402 is notified to UE with the configuration information of above-mentioned expansion special subframe by system broadcasts or high-level signaling.
In this expansion special subframe, the length of GP need satisfy the requirement that the sub-district covers.
In addition, resource configuration unit 401 can also be in UpPTS, the default time interval of configuration between the M of increase OFDM symbol and other OFDM symbol; The default time interval of configuration between N OFDM symbol and UpPTS.
The UE structure chart that Fig. 5 provides for the embodiment of the invention, as shown in Figure 5, this UE mainly comprises: information acquisition unit 501 and signal transmitting unit 502.
Signal transmitting unit 502 is according to the uplink signal transmission resource configuration information, on the resource of OFDM number of symbols greater than 2 UpPTS correspondence, perhaps sends upward signal on the resource of N the OFDM symbol of next-door neighbour UpPTS and UpPTS correspondence among the GP; Wherein N is the integer more than or equal to 1.
This upward signal can be SRS, perhaps other upward signal.
Wherein, information acquisition unit 501 can be obtained the special subframe configuration information of expansion special subframe configuration information or existing LTE system from system broadcasts or high-level signaling; Wherein, among the UpPTS of expansion special subframe the number of OFDM symbol greater than 2; Perhaps from system broadcasts or high-level signaling, obtain the special subframe configuration information of existing LTE system, and further obtain the configuration information of N OFDM symbol in the high-level signaling by extra definition, perhaps obtain the configuration information of N OFDM symbol according to the corresponding relation between the configuration information of pre-configured special subframe configuration information and N OFDM symbol.
When signal transmitting unit 502 sends upward signal at the OFDM number of symbols on greater than the resource of 2 UpPTS correspondence, adopt CP configuration identical or fixing the employing to expand CP and dispose with uplink conventional subframe; When in GP, sending upward signal on the resource of N the OFDM symbol of next-door neighbour UpPTS and UpPTS correspondence, adopts CP configuration identical or fixing employing to expand CP and dispose with UpPTS.
By above description as can be seen, the present invention is by being uplink signal transmission resource with the OFDM number of symbols greater than the resource distribution of 2 UpPTS correspondence or being uplink signal transmission resource with N the OFDM symbol of next-door neighbour UpPTS among the GP and the resource distribution of UpPTS correspondence, uplink signal transmission resource configuration the present invention of the existing LTE system that compares has disposed more uplink signal transmission resource in special subframe, thereby make UE on more uplink signal transmission resource, to send SRS, satisfy the user demand that takies more SRS resource in the LTE-A system in the multi-point cooperative transmission technology, solve the problem of SRS scarcity of resources.
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 made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (18)
1. the collocation method of a uplink signal transmission resource is characterized in that, this method comprises:
The base station is uplink signal transmission resource with the orthogonal frequency division multiplex OFDM number of symbols greater than the resource distribution of 2 uplink pilot time slot UpPTS correspondence; perhaps will protect N the OFDM symbol of next-door neighbour UpPTS among the GP at interval and the resource distribution of UpPTS correspondence is uplink signal transmission resource; and the uplink signal transmission resource configuration information is notified to user terminal UE by system broadcasts or high-level signaling, wherein N is the integer more than or equal to 1.
2. method according to claim 1, it is characterized in that, is that uplink signal transmission resource is specially with the OFDM number of symbols greater than the resource distribution of 2 UpPTS correspondence: the expansion special subframe based on the special subframe configuration of existing LTE system is adopted in described base station, OFDM number of symbols with UpPTS in this expansion special subframe increases M, OFDM number of symbols with GP or descending pilot frequency time slot DwPTS reduces M simultaneously, with the resource distribution of UpPTS correspondence is uplink signal transmission resource, and wherein M is the integer more than or equal to 1;
Describedly the uplink signal transmission resource configuration information is notified to UE by system broadcasts or high-level signaling is: the configuration information of described expansion special subframe is notified to UE by system broadcasts or high-level signaling.
3. method according to claim 1, it is characterized in that, describedly the uplink signal transmission resource configuration information is notified to UE by system broadcasts or high-level signaling is: the special subframe configuration information that described base station will have the LTE system now is notified to UE by system broadcasts or high-level signaling; And the configuration information of described N the OFDM symbol high-level signaling by extra definition is notified to UE, the corresponding relation between the configuration information of a perhaps pre-configured special subframe configuration information and described N OFDM symbol.
4. according to claim 1,2 or 3 described methods, it is characterized in that described OFDM number of symbols adopts the cyclic prefix CP configuration identical with uplink conventional subframe greater than 2 UpPTS, perhaps fixing the employing expanded the CP configuration;
Described N OFDM symbol adopts the CP configuration identical with UpPTS, and perhaps fixing the employing expanded the CP configuration.
5. method according to claim 2 is characterized in that, in UpPTS, and the default time interval of configuration between the M of increase OFDM symbol and other OFDM symbol;
The default time interval of configuration between described N OFDM symbol and the UpPTS.
6. method according to claim 2 is characterized in that, adopts the configuration of notice expansion special subframe, the special subframe configuration to the existing LTE system of the UE of LTE R8 notice to the UE that supports multi-point cooperative transmission.
7. a method that sends upward signal is characterized in that, this method comprises:
UE is according to the uplink signal transmission resource configuration information in system broadcasts or the high-level signaling, on the resource of OFDM number of symbols greater than 2 UpPTS correspondence, perhaps sends upward signal on the resource of N the OFDM symbol of next-door neighbour UpPTS and UpPTS correspondence among the GP; Wherein N is the integer more than or equal to 1.
8. method according to claim 7 is characterized in that, described UE obtains expansion special subframe configuration information from system broadcasts or high-level signaling; Wherein, among the UpPTS of expansion special subframe the number of OFDM symbol greater than 2; Perhaps,
Described UE obtains the special subframe configuration information of existing LTE system from system broadcasts or high-level signaling; And further obtain the configuration information of described N OFDM symbol by the high-level signaling of extra definition, perhaps obtain the configuration information of described N OFDM symbol according to the corresponding relation between the configuration information of pre-configured special subframe configuration information and N OFDM symbol.
9. method according to claim 7 is characterized in that, when described UE sends upward signal at described OFDM number of symbols on greater than the resource of 2 UpPTS correspondence, adopts CP configuration identical with uplink conventional subframe or fixing the employing to expand CP and dispose;
Described UE is close in GP when sending upward signal on the resource of N the OFDM symbol of UpPTS and UpPTS correspondence, adopts CP configuration identical with UpPTS or fixing the employing to expand CP and dispose.
10. a base station is characterized in that, this base station comprises: resource configuration unit and information transmitting unit;
Described resource configuration unit, being used for the OFDM number of symbols is uplink signal transmission resource greater than the resource distribution of 2 UpPTS correspondence, is uplink signal transmission resource with N the OFDM symbol of next-door neighbour UpPTS among the GP and the resource distribution of UpPTS correspondence perhaps;
Described information transmitting unit is used for the uplink signal transmission resource configuration information of described resource configuration unit is notified to UE by system broadcasts or high-level signaling, and wherein N is the integer more than or equal to 1.
11. base station according to claim 10, it is characterized in that, described resource configuration unit adopts the expansion special subframe based on the special subframe configuration of existing LTE system, OFDM number of symbols with UpPTS in this expansion special subframe increases M, OFDM number of symbols with GP or DwPTS reduces M simultaneously, with the resource distribution of UpPTS correspondence is uplink signal transmission resource, and wherein M is the integer more than or equal to 1;
Described information transmitting unit is notified to UE with the configuration information of described expansion special subframe by system broadcasts or high-level signaling.
12. base station according to claim 10, it is characterized in that, the special subframe configuration information that described information transmitting unit will have the LTE system now is notified to UE by system broadcasts or high-level signaling, and the configuration information of described N the OFDM symbol high-level signaling by extra definition is notified to UE.
13., it is characterized in that described resource configuration unit also is used for described OFDM number of symbols is disposed greater than 2 UpPTS employing CP configuration or the fixing expansion CP that adopts identical with uplink conventional subframe according to claim 10,11 or 12 described base stations; Perhaps, adopt CP configuration identical or fixing the employing to expand the CP configuration to described N OFDM symbol with UpPTS.
14. base station according to claim 11 is characterized in that, described resource configuration unit also is used at UpPTS, the default time interval of configuration between the M of increase OFDM symbol and other OFDM symbol; The default time interval of configuration between described N OFDM symbol and UpPTS.
15. base station according to claim 11, it is characterized in that, described information transmitting unit is used for the configuration information of described expansion special subframe is notified to the UE that supports multi-point cooperative transmission by system broadcasts or high-level signaling, the configuration information of the special subframe of described existing LTE system is notified to the UE of LTE R8 by system broadcasts or high-level signaling.
16. a UE is characterized in that, this UE comprises: information acquisition unit and signal transmitting unit;
Described information acquisition unit is used for obtaining the uplink signal transmission resource configuration information from system broadcasts or high-level signaling;
Described signal transmitting unit is used for according to described uplink signal transmission resource configuration information, on the resource of OFDM number of symbols greater than 2 UpPTS correspondence, perhaps sends upward signal on the resource of N the OFDM symbol of next-door neighbour UpPTS and UpPTS correspondence among the GP; Wherein N is the integer more than or equal to 1.
17. UE according to claim 16 is characterized in that, described information acquisition unit is obtained expansion special subframe configuration information from system broadcasts or high-level signaling, and wherein, the number of OFDM symbol is greater than 2 among the UpPTS of expansion special subframe; Perhaps from system broadcasts or high-level signaling, obtain the special subframe configuration information of existing LTE system, and further obtain the configuration information of described N OFDM symbol by the high-level signaling of extra definition, perhaps obtain the configuration information of described N OFDM symbol according to the corresponding relation between the configuration information of pre-configured special subframe configuration information and N OFDM symbol.
18. UE according to claim 16, it is characterized in that, when described signal transmitting unit sends upward signal at described OFDM number of symbols on greater than the resource of 2 UpPTS correspondence, adopt CP configuration identical or fixing the employing to expand CP and dispose with uplink conventional subframe; When in GP, sending upward signal on the resource of N the OFDM symbol of next-door neighbour UpPTS and UpPTS correspondence, adopts CP configuration identical or fixing employing to expand CP and dispose with UpPTS.
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| WO2018126854A1 (en) * | 2017-01-06 | 2018-07-12 | 华为技术有限公司 | Uplink transmission method, terminal, and network-side device |
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