CN101420264B - Uplink control signaling transmission method and apparatus thereof - Google Patents

Abstract

The present invention, pertaining to time division duplex systems and frequency division duplex systems, discloses a method for transmitting uplink control signaling and a device thereof. The method comprises the step that when a transmitting end transmits data frames carrying data information, the transmitting end transmits uplink control signaling on at least two uplink time slots in one data frame or uplink time slots of at least two data frames. According to the present invention, the cover range of uplink control signaling is increased, the receiving performance of the uplink control signaling is improved, furthermore, the system performance is also improved.

Description

Transmission method and device for uplink control signaling

technical field

The present invention relates to the field of wireless communication, in particular to a method and device for transmitting uplink control signaling.

Background technique

In a wireless communication system, uplink control signaling is transmitted in an uplink time slot, and the transmission cycle is usually one time slot. For some systems with a short uplink time slot, on the one hand, due to the limited uplink transmission Send control signaling with greater power to expand the coverage of control signaling. On the other hand, due to the short duration of energy (one slot time) of control signaling, it will lead to a direct decline in system coverage and affect system performance. This greatly increases the operator's networking and network planning costs.

Taking the LTE TDD (Time Division Duplex) system as an example, in the LTE TDD (Time Division Duplex) system, the radio frame for transmitting data information includes a downlink time slot for transmitting downlink data, and a time slot for transmitting uplink data. An uplink time slot, wherein the uplink control signaling is transmitted in the uplink time slot. At present, the LTE TDD system defines two types of wireless frames (LTE Type1 TDD and LTE Type2 TDD). The time slot length of the LTE Type2 TDD wireless frame is 0.675ms, and the time slot length of the LTE Type1 TDD wireless frame is 1ms. Figure 1 shows the time slot structure of the LET Type2 TDD radio frame, where each solid line square represents a time slot. In the LET Type2 TDD wireless frame time slot structure shown in Figure 1, a 10ms wireless frame includes two 5ms half-frames (also data frames), and each half-frame consists of 7 business hours of equal length (675us) The three special time slots are DwPTS (downlink special time slot, length 83.72us), GP (guard interval, length 50us), UpPTS (uplink special time slot, length 141.28us) us).

The current LTE Type2 TDD bearer uplink control signaling design is: the control signaling transmission period is one time slot, that is, the control signaling transmission energy duration is one time slot (675us). Since the LTE Type2 TDD time slot length (0.675ms) is shorter than the LTE Type1 TDD time slot length (1ms), the coverage of uplink control signaling is smaller.

Table 1 shows the link budget comparison results of LTE Type1 TDD and LTE Type2 TDD radio frames, that is, the comparison of the maximum coverage that meets the minimum system quality of service requirements.

Table 1

Required average bit error rate (BER) Reachable cell radius (1ms) Reachable cell radius (0.675ms) 10^-2 ＜1.8km ＜1.6km 10^-4 ＜1.2km ＜1.1km

According to the simulation results of uplink ACK-SINR provided by DoCoMo 3GPP R1-070101, combined with the time slot length of LTE Type2 TDD radio frame is 0.675ms, the comparison results shown in Table 1 can be obtained. It can be seen from this that LTE Type2 TDD has a coverage drop of about 10% compared to LTE Type1 TDD wireless frames.

Contents of the invention

The embodiment of the present invention discloses a method and device for transmitting uplink control signaling, so as to increase the coverage of the uplink control signaling, improve the receiving performance of the uplink control signaling, and improve system performance.

The uplink control signaling transmission method disclosed in the embodiment of the present invention is applied to a time division duplex system and a frequency division duplex system, and the method includes:

When the sending end sends a data frame carrying data information, the sending end transmits uplink control signaling in at least two uplink time slots in a data frame, or in at least two uplink time slots in a data frame.

The data information transmission device disclosed in the embodiment of the present invention is applied to a time division duplex system and a frequency division duplex system, and the device includes:

Setting up a module for carrying uplink control signaling in at least two uplink time slots in one data frame, or in uplink time slots in at least two data frames, and generating a data frame;

a sending module, configured to send the data frame generated by the setting module.

In the above embodiments of the present invention, when the sender sends a data frame, it transmits uplink control signaling in multiple uplink time slots in one data frame, or transmits uplink control signaling in multiple uplink time slots in a data frame, thereby realizing repeated sending The uplink control signaling increases the coverage of the uplink control signaling, improves the receiving performance of the uplink control signaling, and further improves the system performance.

Description of drawings

Fig. 1 is the time slot structure schematic diagram of LTE Type2 TDD radio frame in the prior art;

FIG. 2 is a schematic diagram of a radio frame time slot structure according to Embodiment 1 of the present invention;

FIG. 3 is an example diagram of an inter-slot repetition and frequency hopping structure according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a radio frame time slot structure according to Embodiment 2 of the present invention;

FIG. 5 is a schematic structural diagram of a device for transmitting data information according to an embodiment of the present invention.

Detailed ways

In the embodiment of the present invention, the coverage of the uplink control signaling is improved by repeatedly sending the uplink control signaling in two data frames of one radio frame, thereby improving the receiving performance of the uplink control signaling.

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

Embodiment one

This embodiment describes the transmission mode of uplink control signaling by taking the 10ms wireless frame of the LTE Type2 TDD system, where the ratio of uplink and downlink time slots is 3:4, as an example. The data information sending end constructs a wireless frame as shown in FIG. 2 for sending, so as to achieve the purpose of improving the coverage of the uplink control signaling.

Referring to FIG. 2 , it is a schematic diagram of a radio frame time slot structure according to Embodiment 1 of the present invention. The 10ms wireless frame in Figure 2 includes two 5ms half-frames, and each half-frame includes one downlink time slot TS0, three uplink time slots TS1, TS2, and TS3, and three downlink time slots TS4, TS5, and TS6. .

In order to improve the coverage of the uplink control signaling, this embodiment carries the uplink control signaling in the uplink time slot of each 5ms half-frame, so as to repeatedly send the uplink control signaling twice in a 10ms frame, so that the energy duration It is extended to 2 uplink time slots (that is, 2×Ttimeslot, where Ttimeslot is the length of the uplink time slot).

In this embodiment, the method of repeatedly sending the uplink control signaling can adopt the time slot repetition mode between 5ms frames, that is, the uplink control signaling is first sent in a certain uplink time slot in the previous 5ms frame, and then sent in the next 5ms frame One of the uplink time slots is sent repeatedly. As shown in Figure 2, the uplink control signaling is sent in the TS1 time slot of the previous 5ms frame, and then repeatedly sent in the TS1 time slot of the next 5ms frame, and so on, the TS2 time slot in the two 5ms frames before and after, Both the TS3 time slot and the uplink control signaling can be carried.

In order to ensure the reception performance of the uplink control signaling of the cell edge and high-speed users, in this embodiment, the uplink control signaling is carried by frequency hopping in the uplink time slots in which the uplink control signaling is repeatedly sent, that is, between the time slots. Different frequency resources carry the same information to obtain frequency diversity gain. As shown in Figure 3, in the previous 5ms frame, frequency resource block 1 and frequency resource block 2 can respectively carry the uplink control signaling in the TS1 time slot; in the next 5ms frame, the TS1 time slot repeatedly sends the uplink control signaling Signaling, the information carried by the frequency resource block 1 in the uplink time slot TS1 of the previous 5ms frame is carried by the frequency resource block 2 in the uplink time slot TS1 of the next 5ms frame, and the information carried by the frequency resource block 2 in the uplink time slot TS1 of the previous 5ms frame The information carried by the frequency resource block 2 in the slot TS1 is carried by the frequency resource block 1 in the uplink time slot TS1 of the next 5 ms frame, so as to obtain time and frequency diversity gain. For the LTE system, its total bandwidth can be 5MHz, 10MHz, 20MHz, etc. The above-mentioned bandwidth of a frequency resource block can be set to 180KHz, and the remaining bandwidth in the time slot can be used for data or other information transmission. In this embodiment, two frequency resource blocks are used to carry uplink control signaling in each uplink time slot. In specific implementation, more frequency resource blocks may be used to carry uplink control signaling according to system requirements.

Using the above method to transmit uplink control signaling, as shown in Figure 2, it can be seen that TS1 of the two 5ms frames before and after form a double-slot pairing, and similarly, TS2 and TS3 of the last two 5ms frames form a double-slot pairing respectively . The uplink time slots forming the double time slot pair may carry the same uplink control signaling in a frequency hopping manner or not in a frequency hopping manner, and the frequency hopping manner may be used to obtain gains in time and frequency. Therefore, the above-mentioned method for transmitting uplink control signaling in this embodiment can not only improve the coverage of uplink control signaling, but also solve the problem that dual time slots cannot be performed within a 5 ms frame in the prior art when the number of uplink time slots is odd. gap pairing problem.

Embodiment two

This embodiment describes the transmission mode of uplink control signaling by taking the 10ms wireless frame of the LTE Type2 TDD system, where the ratio of uplink and downlink time slots is 3:4, as an example. The data information sending end constructs a wireless frame as shown in FIG. 2 for sending, so as to achieve the purpose of improving the coverage of the uplink control signaling.

Referring to FIG. 4 , it is a schematic diagram of a radio frame time slot structure according to Embodiment 1 of the present invention. The 10ms wireless frame in Figure 4 includes two 5ms half-frames, and each half-frame includes one downlink time slot TS0, three uplink time slots TS1, TS2, and TS3, and three downlink time slots TS4, TS5, and TS6. .

In this embodiment, by carrying the uplink control signaling in the uplink time slot of each 5ms half-frame, the uplink control signaling is repeatedly sent twice in a 10ms frame, so that the energy duration is extended to two uplink time slots (that is, 2×Ttimeslot, where Ttimeslot is the length of the uplink time slot).

In this embodiment, the method of repeatedly sending the uplink control signaling can adopt the time slot repetition mode between 5ms frames, that is, the uplink control signaling is first sent in a certain uplink time slot in the previous 5ms frame, and then sent in the next 5ms frame One of the uplink time slots is sent repeatedly. As shown in Figure 2, the uplink control signaling is sent in the TS1 time slot of the previous 5ms frame, and then repeatedly sent in the TS1 time slot of the next 5ms frame, and so on. All TS3 time slots can carry uplink control signaling.

In this embodiment, frequency hopping is used to carry the uplink control signaling in the uplink time slots in which the uplink control signaling is repeatedly sent, that is, different frequency resources are used to carry the same information between time slots, so as to obtain time and frequency diversity gain . As shown in Figure 3, in the previous 5ms frame, frequency resource block 1 and frequency resource block 2 can respectively carry the uplink control signaling in the TS1 time slot; in the TS2 time slot in the 5ms frame, the uplink control signal is repeatedly sent Therefore, the information carried by frequency resource block 1 in TS1 is carried by frequency resource block 2 in TS2, and the information carried by frequency resource block 2 in TS1 is carried by frequency resource block 1 in TS2, thereby obtaining frequency diversity gain . Similarly, in the previous 5ms frame, frequency resource block 1 and frequency resource block 2 respectively carry uplink control signaling in TS3; in the next 5ms frame, frequency resource block 1 The information carried is carried by frequency resource block 2 in TS1 of the next 5ms frame, and the information carried by frequency resource block 2 in TS3 of the previous 5ms frame is carried by frequency resource block 1 in TS1 of the next 5ms frame Bearing, thereby obtaining time and frequency diversity gain. For the time slots carrying uplink control signaling, the remaining bandwidth carrying uplink control signaling can be used for transmission of data or other information.

It can be seen that TS1 and TS2 in the previous 5ms frame form a double-slot pair, TS2 and TS3 in the next 5ms frame form a double-slot pair, and TS3 in the previous 5ms frame and TS1 in the next 5ms frame A two-slot pair is formed. The uplink time slots forming the double time slot pair may carry the same uplink control signaling in a frequency hopping manner or not in a frequency hopping manner, and the frequency hopping manner may be used to obtain gains in time and frequency. Therefore, the above-mentioned method for transmitting uplink control signaling in this embodiment can not only improve the coverage of uplink control signaling, but also solve the problem that dual time slots cannot be performed within a 5 ms frame in the prior art when the number of uplink time slots is odd. gap pairing problem. Moreover, the transmission delay caused by simply using inter-frame time slot pairing can be reduced.

In the above embodiment of the present invention, when performing double time slot pairing on the uplink time slots carrying uplink control signaling in the previous 5ms frame and the next 5ms frame, flexible pairing can be adopted according to the ratio of uplink and downlink time slots in the system It can be realized in different ways, including: performing double-slot pairing within a 5ms frame, or performing double-slot pairing between 5ms frames, or performing double-slot pairing within a 5ms frame for some time slots, and performing dual-time slot pairing between 5ms frames for some time slots gap pairing.

The above embodiment is a preferred embodiment of the present invention. In addition, if only two or more uplink time slots in a 5ms frame carry uplink control signaling, compared with the prior art, the uplink control signaling can also be increased. Further, if these uplink time slots are paired and frequency hopping is used to transmit uplink control signaling, gains in time and frequency will also be obtained.

For the frequency division duplex system, the coverage of the uplink control signaling can also be increased by repeatedly sending the uplink control signaling. In a frequency division duplex system, data frames can be divided into uplink data frames and downlink data frames. In the two uplink data frames, the uplink time slot carrying uplink control signaling in the first uplink data frame is paired with the uplink time slot carrying uplink control signaling in the second uplink data frame, or, in Perform double-slot pairing between uplink time slots carrying uplink control signaling in the first uplink data frame, and perform double-slot pairing between uplink time slots carrying uplink control signaling in the second uplink data frame; or, Part of the uplink time slots carrying uplink control signaling in the first uplink data frame performs double-slot pairing, and part of the uplink time slots carrying uplink control signaling in the second uplink data frame performs double-slot pairing, and the second uplink data frame carries out double-slot pairing. The remaining uplink time slots carrying the uplink control signaling in one uplink data frame are paired with the remaining uplink time slots carrying the uplink control signaling in the second uplink data frame.

The two uplink time slots that form a double-slot pair can use frequency hopping or not to transmit the same uplink control signaling. When frequency hopping is used, the two uplink time slots that form a double-slot pair use different Frequency resource blocks transmit the same uplink control signaling.

Embodiments of the present invention also provide a device for transmitting data information, which can be applied to time division duplex systems and frequency division duplex systems, as shown in Figure 5, the device includes a setting module and a sending module, wherein

The configuration module is used to carry uplink control signaling in at least two uplink time slots in one data frame, or in uplink time slots in at least two data frames, and generate a data frame. For example, the uplink control signaling is respectively carried in the uplink time slots of the two 5ms frames of the 10ms radio frame in the time division duplex system, and the 10ms radio frame is generated;

The sending module is used to send the data frame generated by the settings of the above setting module.

The setting module in the above-mentioned data information transmission device is further configured to carry uplink control signaling in at least one uplink time slot of the first data frame and the second data frame of the two data frames, for example, within 10 ms The TS1, TS2 and TS3 time slots in the 5ms frames before and after the radio frame carry uplink control signaling respectively. When the setting module is configured to carry uplink control signaling, in each of the uplink time slots used to carry uplink control signaling in the first data frame and the second data frame of the wireless frame, use multiple The time and frequency resource blocks carry the uplink control signaling. The setting module can set the resources other than those carrying uplink control signaling in these time slots to carry other data information, such as user data or other control information.

The setting module in the above-mentioned data information transmission device can also be further used to carry the uplink control signaling in the first data frame of the two data frames in the process of setting the uplink control signaling. The uplink time slots carrying uplink control signaling in the first data frame perform double-slot pairing; or, perform double-slot pairing on the uplink time slots carrying uplink control signaling in the first data frame, and perform double-slot pairing in the second data frame Double-slot pairing is performed on the uplink time slots carrying uplink control signaling; or, double-slot pairing is performed on part of the uplink time slots carrying uplink control signaling in the first data frame, and uplink control signaling is carried in the second data frame The part of the uplink time slots of the signaling is paired with double time slots, and the remaining uplink time slots carrying the uplink control signaling in the first data frame are paired with the remaining uplink time slots carrying the uplink control signaling in the second data frame. Slot pairing. The two uplink time slots forming a double time slot pair can use frequency hopping or not to transmit the same uplink control signaling. When frequency hopping is used, the two uplink time slots forming a double time slot pair can use the same Or different frequency resource blocks transmit the same uplink control signaling.

To sum up, in the above-mentioned embodiment of the present invention, when the sending end sends a 10ms wireless frame, the uplink control signaling is transmitted in each 5ms half frame of the wireless frame, thereby repeatedly sending the uplink control signaling in a 10ms wireless frame. The control signaling increases the coverage of the uplink control signaling, improves the receiving performance of the uplink control signaling, and further improves the system performance. In addition, the embodiment of the present invention adopts frequency hopping to transmit the uplink control signaling, which can ensure the reception performance of the uplink control signaling of the cell edge and high-speed users. The above-mentioned embodiments of the present invention also provide a flexible double-slot pairing manner, which solves the problem in the prior art that time slot pairing cannot be performed when the uplink time slots are odd.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (8)

1. a uplink control signaling transmission method is applicable to time division duplex and frequency division duplex system, it is characterized in that, comprising:

When transmitting terminal sends the Frame of carry data information, the ascending time slot transmission upstream control signaling of this transmitting terminal at least two Frames;

In first Frame, be used for sending and carry out two time slot pairings between described uplink control signaling ascending time slot, in second Frame, be used for sending and carry out two time slot pairings between described uplink control signaling ascending time slot, form two identical upstream control signalings of ascending time slot transmission of two time slot pairings; Perhaps, in first Frame, be used for sending and carry out two time slot pairings between described uplink control signaling part ascending time slot, in second Frame, be used for sending and carry out two time slot pairings between described uplink control signaling part ascending time slot, and with carrying out two time slots pairings for sending all the other ascending time slots of described uplink control signaling and described second Frame for sending all the other ascending time slots of described uplink control signaling in described first Frame, form two identical upstream control signalings of ascending time slots transmission that pair time slots match.

2. the method for claim 1 is characterized in that, described transmitting terminal is the described upstream control signaling of transmission at least one ascending time slot of first Frame in two Frames and second Frame respectively.

3. method as claimed in claim 2 is characterized in that, described transmitting terminal at the upper transmission upstream control signaling of at least one ascending time slot of described first Frame and described second Frame, is specially respectively:

Described transmitting terminal sends described upstream control signaling by a plurality of times, frequency resource block respectively in each time slot of the described ascending time slot of described first Frame and second Frame.

4. such as claim 1,2 or 3 described methods, it is characterized in that two ascending time slots that form two time slot pairings are used the identical or different identical upstream control signalings of frequency resource block transmission.

5. the transmitting device of a data message is characterized in that, is applicable to time division duplex and frequency division duplex system, comprising:

Module is set, is used for the ascending time slot carrying upstream control signaling at least two Frames, and the generated data frame; And the described uplink control signaling ascending time slot of carrying carries out two time slot pairings in first Frame, the described uplink control signaling ascending time slot of carrying carries out two time slot pairings in second Frame, forms two identical upstream control signalings of ascending time slot transmission of two time slot pairings; Perhaps, the described uplink control signaling part ascending time slot of carrying carries out two time slot pairings in first Frame, the described uplink control signaling part ascending time slot of carrying carries out two time slot pairings in second Frame, and all the other ascending time slots of the described uplink control signaling of carrying in carrying all the other ascending time slots of described uplink control signaling and described second Frame in described first Frame are carried out two time slots match, form two identical upstream control signalings of ascending time slot transmission of two time slot pairings;

Sending module is used for sending the described described Frame that module arranges generation that arranges.

6. transmitting device as claimed in claim 5 is characterized in that, the described module that arranges is further used for, respectively the described upstream control signaling of carrying at least one ascending time slot in first Frame in described two Frames and second Frame.

7. transmitting device as claimed in claim 6, it is characterized in that, the described module that arranges is further used for, and in each time slot of the described ascending time slot of described first Frame and described second Frame, sends described upstream control signaling by a plurality of times, frequency resource block respectively.

8. such as claim 5,6 or 7 described transmitting devices, it is characterized in that two ascending time slots that form two time slot pairings are used the identical or different identical upstream control signalings of frequency resource block transmission.

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