CN102281592B - A method and device for transmission power control command transmission - Google Patents

Abstract

A method for transmitting a transmission power control command, the method comprising: a base station or a radio resource controller RNC-radio network control issues a parameter tpc-index related to an uplink transmission power control command for a terminal UE, and a physical downlink control channel PDCCH is configured according to a predetermined The order and position of each uplink carrier carry the TPC information of the uplink channel of each uplink carrier; for the TPC information of PUSCH, use the physical uplink shared channel scrambling code TPC-PUSCH-RNTI to scramble the PDCCH; for the TPC information of PUCCH, use the physical uplink control The channel scrambling code TPC-PUCCH-RNTI scrambles the PDCCH and sends the PDCCH to the UE. This paper also discloses a device for transmitting power control command transmission. After applying the embodiment of the present invention, the overhead of control signaling can be reduced.

Description

A method and device for transmission power control command transmission

technical field

The present invention relates to the technical field of communications, and more specifically, to a method and device for transmitting a transmission power control command.

Background technique

In the LTE (Long Term Evolution, long-term evolution) R8 standard, when the UE is performing uplink data transmission, the TPC for PUCCH (Physical uplink control channel, physical uplink control channel) and PUSCH (Physical uplink shared channel, physical uplink shared channel) The (transmitpower control, transmission power control) command is notified by the base station to the UE (user) through the bearer transmission of the PDCCH (Physical downlink control channel, physical downlink control channel) DCI (downlink control information, downlink control information) format3/3a. The main difference between PDCCH DCI format 3 and format 3a is: for a specific UE's uplink channel PUCCH or PUSCH, format 3 has 2-bit transmission power control (TPC) information, while format 3a has only 1-bit TPC information.

When using PDCCH DCI format3/3a to bear and transmit TPC information, for the TPC information of PUCCH, the PDCCH is scrambled by the physical uplink control channel scrambling code TPC-PUCCH-RNTI, and the parameter tpc related to the TPC information of the PUCCH channel is used -index indicates which position corresponds to the UE's own TPC information; similarly, for the TPC information of the PUSCH, the PDCCH is scrambled by the physical uplink shared channel scrambling code TPC-PUSCH-RNTI, and the TPC information related to the PUSCH channel is used The related parameter tpc-index indicates which position corresponds to the UE's own TPC information. In addition, the TPC-PUCCH-RNTI is different from the TPC-PUSCH-RNTI, which is used to distinguish whether the TPC information corresponds to the uplink PUCCH channel or the PUSCH channel of the UE. For a certain UE, TPC-PUCCH-RNTI, TPC-PUSCH-RNTI and TPC information-related parameter tpc-index are all configured by higher layers.

LTE-Advanced (LTE Enhanced) proposes the concept of uplink and downlink carrier aggregation, that is, multiple carriers can be used for uplink and downlink transmission. According to the conclusion reached so far: Uplink and downlink can support up to five carriers, and each carrier can have a maximum bandwidth of 20M. In this way, both uplink and downlink can support up to 100M bandwidth. If the UE is performing uplink data transmission at this time, for the TPC information of the PUCCH/PUSCH on each uplink carrier, how the base station uses the PDCCH DCI format 3/3a to carry and transmit the information to the UE is a problem that needs to be solved.

The prior art has the following methods to solve the above problems:

(1) Use multiple PDCCH channels to carry TPC information

See FIG. 1 for a schematic diagram of a signaling structure of a certain uplink carrier transmitting a power control command in LTE-Advanced in the case of carrier aggregation. For a certain uplink carrier of UE, add carrier indication information (CIF) in PDCCH DCIformat 3/3a. The CIF is used to indicate which uplink carrier the TPC information transmitted by the bearer corresponds to. In this way, the UE can know which uplink carrier of the UE the following TPC information corresponds to from the CIF information. The following TPC information is related to the parameter tpc-index configured by the upper layer, and the tpc-index is used to indicate which position corresponds to the UE's own TPC information on the uplink carrier. Among them, for the TPC information of PUCCH, the PDCCH is scrambled by TPC-PUCCH-RNTI; for the TPC information of PUSCH, the PDCCH is scrambled by TPC-PUSCH-RNTI, so as to distinguish whether the TPC information corresponds to the uplink PUCCH channel or the PUSCH channel. Wherein, since the uplink channels PUCCH and PUSCH of each uplink carrier correspond to corresponding PDCCH channels, the uplink channels of multiple uplink carriers correspond to different downlink PDCCH channels for bearer transmission. Therefore, the TPC-PUCCH-RNTI related to the TPC information of the PUCCH channel for different uplink carriers can be the same or different, and the TPC-PUSCH-RNTI related to the TPC information of the PUSCH channel for different uplink carriers can also be the same or different .

(2) Use a PDCCH channel to carry and transmit TPC information

Refer to the left figure in Figure 2, which is a schematic diagram of the signaling structure for transmitting two uplink carrier transmission power control commands in one PDCCH channel. Two CIF indication information are added to indicate that the subsequent TPC information corresponds to different uplink carriers. . Correspondingly, the TPC information after the corresponding CIF is related to the parameter tpc-index configured by the upper layer, and this parameter tpc-index is used to indicate which position in the following TPC information is the TPC information of the corresponding UE. For the two uplink carriers, one PDCCH channel is used to bear and transmit related TPC information. The TPC information of PUCCH is scrambled to PDCCH by TPC-PUCCH-RNTI; the TPC information of PUSCH is scrambled to PDCCH by TPC-PUSCH-RNTI to distinguish whether TPC information corresponds to uplink PUCCH channel or PUSCH channel. At this time, one TPC-PUCCH-RNTI and one TPC-PUSCH-RNTI are required.

The difference between the right diagram in Figure 2 and the left diagram is that the tpc-index parameters of the two uplink carriers corresponding to a certain UE related to the TPC information in the left diagram are the same, while the tpc-index parameters in the right diagram is different. Similarly, for the TPC information of PUCCH, the PDCCH is scrambled by TPC-PUCCH-RNTI; for the TPC information of PUSCH, the PDCCH is scrambled by TPC-PUSCH-RNTI to distinguish whether the TPC information corresponds to the uplink PUCCH channel or the PUSCH channel . At this time, 1 TPC-PUCCH-RNTI and 1 TPC-PUS CH-RNTI are required.

To sum up, in the prior art, for each uplink carrier carrying PUCCH/PUSCH of the UE, when carrying and transmitting its TPC information, it is necessary to add a corresponding CIF in the PDCCH for carrier indication. The added CIF at this time reduces the content of the TPC information carried and transmitted by the PDCCH, and increases the overhead of control signaling.

Contents of the invention

An embodiment of the present invention proposes a transmission power control command transmission method to reduce control signaling overhead.

The embodiment of the present invention also proposes an apparatus for transmitting a transmission power control command, so as to reduce control signaling overhead.

The technical scheme of the embodiment of the present invention is as follows:

A method for transmitting a transmission power control command, wherein a base station or a radio resource controller RNC-radionetwork control issues a parameter tpc-index related to an uplink transmission power control command for a terminal UE, the method comprising:

The physical downlink control channel PDCCH bears and transmits the TPC information of the uplink channel of each uplink carrier according to the predetermined order and position;

For the TPC information of the PUSCH, use the physical uplink shared channel scrambling code TPC-PUSCH-RNTI to scramble the PDCCH; for the TPC information of the PUCCH, use the physical uplink control channel scrambling code TPC-PUCCH-RNTI to scramble the PDCCH, and The PDCCH is sent to the UE.

The carrying according to the predetermined order and position includes continuously carrying according to the number of carriers, and the number of bits of the TPC information is the same.

The carrying according to the predetermined order and position includes carrying sequentially according to the number of carriers, the number of bits of the TPC information is the same, and the interval between adjacent carriers is the same.

The uplink carriers further include a segment identifier, and the segment identifier distinguishes the starting position of the tpc-index.

The uplink carriers further include carrier indication information CIF, and the CIF distinguishes the starting position of the tpc-index.

When there are at least two TPC-PUSCH-RNTIs, the TPC-PUSCH-RNTIs are the same; when there are at least two TPC-PUCCH-RNTIs, the TPC-PUCCH-RNTIs are the same.

The tpc-index is the same.

The tpc-index is different.

A device for transmitting a transmission power control command. A base station or a radio resource controller RNC-radionetwork control issues and uplink transmission power control parameters tpc-index for a terminal UE. The device includes:

At the sending end, the physical downlink control channel PDCCH bears and transmits the TPC information of the uplink channel of each uplink carrier in a predetermined order and position; for the TPC information of the PUSCH, the physical uplink shared channel scrambling code TPC-PUSCH-RNTI is used to scramble the PDCCH ; For the TPC information of the PUCCH, use the physical uplink control channel scrambling code TPC-PUCCH-RNTI to scramble the PDCCH;

The receiving end uses TPC-PUSCH-RNTI to descramble the PDCCH, and uses TPC-PUCCH-RNTI to descramble the PDCCH, and the receiving end uses the tpc-index index to the position corresponding to the TPC information on the PDCCH , further obtaining the TPC information according to a predetermined sequence.

The sender includes,

The control module carries and transmits the TPC information of the uplink channel of each carrier in the uplink according to the predetermined sequence and position on the PDCCH;

The scrambling module, for the TPC information of the PUSCH, scrambles the PDCCH by using TPC-PUSCH-RNTI; for the TPC information of the PUCCH, uses TPC-PUCCH-RNTI to scramble the PDCCH;

The receiver includes,

The descrambling module uses TPC-PUSCH-RNTI to descramble the PDCCH, and uses TPC-PUCCH-RNTI to descramble the PDCCH;

The message module, indexed by the tpc-index to the position corresponding to the TPC information of the receiving end on the PDCCH, further carries the TPC information in a predetermined order to obtain the TPC information.

The control module is configured to control the PDCCH to carry successively according to the number of carriers, and the number of bits of the TPC information is the same.

The control module is configured to control the PDCCH to carry sequentially according to the number of carriers, the number of bits of the TPC information is the same, and the interval between adjacent carriers is the same.

The control module is further configured to set a segment identifier between uplink carriers, and the segment identifier distinguishes the starting position of the tpc-index.

The control module is further configured to set carrier indication information CIF between uplink carriers, and the CIF distinguishes the starting position of the tpc-index.

The control module is further configured to, when there are at least two TPC-PUSCH-RNTIs, set the TPC-PUSCH-RNTIs to be the same, and when there are at least two TPC-PUCCH-RNTIs, set the TPC-PUCCH-RNTIs to be the same.

It can be seen from the above technical solutions that, in the embodiment of the present invention, the high layer configures and sends the parameter tpc-index related to uplink transmission power control for the UE, and uses the PDCCH to carry the transmission information on each uplink carrier of the UE according to the predetermined order and position. TPC information on the PUCCH/PUSCH; for the TPC information of the PUSCH channel, use TPC-PUSCH-RNTI to scramble the PDCCH; for the TPC information of the PUCCH channel, use the TPC-PUCCH-RNTI to scramble the PDCCH, and then send The PDCCH. Since the PDCCH is used to carry TPC information in a predetermined order, the CIF may not be used, thereby reducing the overhead of control signaling.

Description of drawings

FIG. 1 is a schematic diagram of a signaling structure of a certain uplink carrier transmission power control command in a carrier aggregation situation in the prior art;

FIG. 2 is a schematic diagram of a signaling structure of an uplink channel transmission power control command for two uplink carriers carried by the same PDCCH in the prior art;

FIG. 3 is a schematic flowchart of a method for transmitting a transmission power control command according to an embodiment of the present invention;

4 is a schematic diagram of a signaling structure of an uplink channel transmission power control command that uses the same PDCCH to bear and transmit multiple uplink carriers according to an embodiment of the present invention;

5 is a schematic diagram of a signaling structure of an uplink channel transmission power control command that uses the same PDCCH to carry and transmit multiple uplink carriers according to Embodiment 2 of the present invention;

FIG. 6 is a schematic diagram of a signaling structure of uplink channel transmission power control commands of two uplink carriers transmitted using the same PDCCH bearer in Embodiment 3 of the present invention;

7 is a schematic diagram of a signaling structure of uplink channel transmission power control commands of two uplink carriers transmitted using the same PDCCH bearer in Embodiment 4 of the present invention;

FIG. 8 is a schematic structural diagram of a device for transmitting power control commands according to the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

In the embodiment of the present invention, in the transmission process of the TPC information, since the number of bits (bits) of the TPC information carried and transmitted by the PDCCH is limited, and adding the CIF information of a carrier just needs to occupy 3 bits, the present invention makes full use of the uplink of the uplink carrier The sequential transmission of TPC information of the channel does not need to use CIF for carrier indication, and compared with the prior art, the increase of control signaling overhead is avoided. In addition, in Embodiments 3 and 4, for the PUCCH channel, since the same TPC-PUCCH-RNTI is used to scramble the PDCCH carrying and transmitting its TPC information, the corresponding increase in the number of uplink carriers is avoided. -PUCCH-RNTI; for the PUSCH channel, since the same TPC-PUSCH-RNTI is used to scramble the PDCCH that carries and transmits its TPC information, it avoids the corresponding increase of TPC-PUSCH-RNTI due to the increase in the number of uplink carriers . The reduction in the number of TPC-PUCCH-RNTI and TPC-PUSCH-RNTI further reduces the complexity of UE blind detection of PDCCH.

For a certain UE, generally corresponding to the TPC information of the PUCCH channel on different uplink carriers, different TPC-PUCCH-RNTI can be used to scramble the PDCCH; corresponding to the TPC information of the PUSCH channel on different uplink carriers, different The TPC-PUSCH-RNTI scrambles the PDCCH. In this case, the corresponding relationship between different scrambling codes and uplink carriers can be used to distinguish whether the TPC information transmitted by the PDCCH corresponds to which uplink carrier's PUCCH channel or PUSCH channel . If the above method is adopted, the complexity of blind detection of the PDCCH by the UE will be increased. For example, a certain UE has uplink PUCCH and PUSCH channels on its two uplink carriers respectively, and the TPC information of the PUCCH channel on each uplink carrier is carried and transmitted in the same downlink PDCCH channel. In the prior art, corresponding to the TPC information of the PUCCH channel on the two uplink carriers of the UE, two different TPC-PUCCH-RNTIs are required to scramble the PDCCH carrying the TPC information respectively; For the TPC information of the PUSCH channel, two different TPC-PUSCH-RNTIs are required to scramble the PDCCH carrying the TPC information respectively; it is used to distinguish which uplink PUCCH channel of the UE the TPC information carried by the PDCCH corresponds to. Or PUSCH channel. After receiving the PDCCH information, the UE needs to use the corresponding scrambling code to descramble the PDCCH four times in total. Therefore, reducing the number of TPC-PUCCH-RNTI and TPC-PUSCH-RNTI can reduce the number of descrambling times for the UE on the PDCCH, and further reduce the complexity of blind detection of the PDCCH by the UE. Therefore, in the third and fourth embodiments of the present invention, for the TPC information of the PUCCH channels of multiple uplink carriers of a certain UE, multiple TPC-PUCCH-RNTIs can be the same, and the PUSCH channels of multiple uplink carriers For TPC information, multiple TPC-PUSCH-RNTIs may also be the same.

Referring to Figure 3, it is a schematic flow chart of a method for transmitting a transmission power control command according to an embodiment of the present invention, which specifically includes the following steps:

Step 301 , sending parameters and carrying TPC information.

The base station or the radio resource controller (RNC-radio network control) sends the parameter tpc-index related to the TPC information of the uplink channel to the UE, and carries and transmits the information of each uplink carrier in the predetermined order and the position specified by the parameter tpc-index in the PDCCH TPC information of the uplink channel.

Step 302, scrambling the PDCCH.

For the TPC information of PUCCH, the PDCCH is scrambled by TPC-PUCCH-RNTI; for the TPC information of PUSCH, the PDCCH is scrambled by TPC-PUSCH-RNTI to distinguish whether the TPC information corresponds to the uplink PUCCH channel or the PUSCH channel.

Step 303, sending the PDCCH.

The TPC information of the PUCCH and the PUSCH is notified to the UE through the bearer transmission of the PDCCH. The PDCCH is delivered to the UE by the base station after channel coding and other operations.

Step 304, the UE receives the PDCCH, and performs descrambling according to the scrambling code.

The UE receives the PDCCH, descrambles the received PDCCH information according to the scrambling code allocated by itself, and judges whether the PDCCH has the TPC information of the uplink channel of its own uplink carrier.

Step 305, UE obtains TPC information.

If the descrambling is correct, use the tpc-index to index the position of the TPC information of the UE on the PDCCH, and read the TPC information of the uplink channels of each uplink carrier in a predetermined order.

Embodiment one

In Figure 4, when the base station performs semi-static data scheduling, first the high-level base station or radio resource controller (RNC-radio network control) sends the parameter tpc-index related to TPC information to the UE, and then according to the predetermined The order and position of the parameter tpc-index carry the corresponding TPC information. For the TPC information of PUCCH, the PDCCH is scrambled by TPC-PUCCH-RNTI; for the TPC information of PUSCH, the PDCCH is scrambled by TPC-PUSCH-RNTI to distinguish whether the TPC information corresponds to the uplink PUCCH channel of the uplink carrier or the PUSCH channel . The TPC information of the PUCCH and the PUSCH is notified to the UE through the bearer transmission of the PDCCH. Then the PDCCH is delivered to the UE by the base station after channel coding and other operations. In the same PDCCH, the TPC information of each carrier is successively carried and transmitted in sequence according to the predetermined carrier order, that is, from the first carrier to the fourth carrier, the number of bits occupied by the TPC information of the uplink channel of each carrier is the same, The order of the carriers can be specified according to certain methods and principles. For example, for a certain UE, which uses four carriers for uplink, the same PDCCH is used to carry the TPC information of the aggregated uplink channel of the four uplink carriers. The TPC information of the uplink channel of the first carrier is indicated by the tpc-index1 parameter, the TPC information of the uplink channel of the fourth carrier is indicated by the tpc-index2 parameter, and the uplink channel of the second carrier and the third carrier The TPC information is carried between the first carrier and the fourth carrier in a predetermined order. In this way, as long as two parameters are used, that is, the start and end positions of the TPC information, the UE can know the TPC information of the uplink channel of each uplink carrier.

For the above method, of course, only one parameter tpc-index can be used, which indicates the initial position of the TPC information of the uplink channel of the first carrier in the predetermined order of a certain UE, and then carries its uplink channel according to the number of carriers and the order of the carriers TPC information.

For the TPC information of the PUCCH of the uplink carrier, the PDCCH is scrambled by TPC-PUCCH-RNTI; for the TPC information of the PUSCH of the uplink carrier, the PDCCH is scrambled by the TPC-PUSCH-RNTI to distinguish whether the TPC information corresponds to the uplink PUCCH The channel is still the PUSCH channel.

After receiving the PDCCH information delivered by the base station, the UE first descrambles the PDCCH according to the scrambling code. If the descrambling is consistent, read the TPC information of the uplink channel of the corresponding carrier on the PDCCH according to the position indicated by the parameter tpc-index in the order of the carriers.

For different numbers of uplink carrier aggregation, a similar above-mentioned technical solution can be used, and details will not be repeated herein. Certainly, the TPC information of the uplink channel of each uplink carrier may also be sequentially and discontinuously carried, that is, it may be transmitted according to the order of the carriers at intervals, and the intervals between the carriers are the same. For example: at intervals of one or several carriers, corresponding TPC information is carried and transmitted through the PDCCH according to a predetermined sequence of carriers.

Embodiment two

Referring to Figure 5, when the base station performs semi-static data scheduling, the base station or the RNC-radionetwork control first sends the parameter tpc-index related to the TPC information to the UE, and then carries the corresponding TPC information according to the position of the parameter tpc-index. The number of bits of the TPC information is the same. For the TPC information of PUCCH, the PDCCH is scrambled by TPC-PUCCH-RNTI; for the TPC information of PUSCH, the PDCCH is scrambled by TPC-PUSCH-RNTI, so as to distinguish whether the TPC information corresponds to the uplink PUCCH channel or the PUSCH channel. The TPC information of the PUCCH and the PUSCH is notified to the UE through the bearer transmission of the PDCCH. Then the PDCCH is delivered to the UE by the base station after channel coding and other operations. In the same PDCCH, the TPC information of each carrier is successively carried and transmitted in sequence according to the predetermined carrier order, that is, from the first carrier to the fourth carrier, the number of bits occupied by the TPC information of the uplink channel of each carrier is the same, The order of the carriers can be specified according to certain methods and principles. For example, the same PDCCH is used to bear the TPC information of four aggregated uplink channels of uplink carriers. The TPC information of the uplink channel of the first carrier is indicated by tpc-index1, while the TPC information of the second uplink carrier, the third uplink carrier and the fourth uplink carrier do not need to be indicated by tpc-index. The second uplink carrier, the third uplink carrier and the fourth uplink carrier are carried after the first carrier in a predetermined order. In this way, as long as one parameter is used, that is, the starting position of the TPC information, the UE can know the TPC information of the uplink channel of each uplink carrier according to the number and order of the uplink carriers.

For the TPC information of the PUCCH of the uplink carrier, the PDCCH is scrambled by TPC-PUCCH-RNTI; for the TPC information of the PUSCH of the uplink carrier, the PDCCH is scrambled by the TPC-PUSCH-RNTI to distinguish whether the TPC information corresponds to the uplink PUCCH The channel is still the PUSCH channel.

After receiving the PDCCH information delivered by the base station, the UE first descrambles the PDCCH according to the scrambling code. If the descrambling is consistent, read the TPC information of the uplink channel of the corresponding carrier on the PDCCH according to the order of the carriers and the number of carriers according to the starting position indicated by the parameter tpc-index.

For different numbers of uplink carrier aggregation, a similar above-mentioned technical solution can be used, and details will not be repeated herein. Of course, the TPC information of the uplink channel of each uplink carrier may also be sequentially and discontinuously carried, that is, it may be transmitted at intervals according to the order of the carriers, and the intervals between the carriers are the same. For example: at intervals of one or several carriers, corresponding TPC information is carried and transmitted through the PDCCH according to a predetermined sequence of carriers.

Embodiment three

Referring to FIG. 6 , the left and right diagrams are schematic diagrams of PDCCH structures of two uplink carrier transmission power control commands in Embodiment 3. The difference from the technical solutions of Embodiment 1 and Embodiment 2 is that the intervals between adjacent carriers may be different, and segment identifiers are added between the TPC information of each carrier. The TPC information of the PUCCH and the PUSCH is notified to the UE through the bearer transmission of the PDCCH. For the TPC information of the uplink channel PUCCH, the TPC-PUCCH-RNTI scrambles the PDCCH; for the TPC information of the uplink channel PUSCH, the TPC-PUSCH-RNTI scrambles the PDCCH to distinguish whether the TPC information corresponds to PUCCH or PUSCH .

In FIG. 6 , the number of UE carrier aggregation is 2, and the TPC information of the uplink channel PUCCH/PUSCH of each uplink carrier is carried and transmitted by using the same PDCCH. When performing semi-static data scheduling, the base station may add a segment identifier at a fixed position between PDCCHs for TPC information of different uplink carriers. The TPC information before the segment identifier corresponds to a certain uplink carrier, and the parameter tpc-index 1 is used to indicate which position is the TPC information of the UE; the TPC information after the segment identifier corresponds to another uplink carrier , and use the parameter tpc-index2 to indicate which location is the TPC information of the UE.

For the TPC information of the uplink channel PUCCH of the uplink carrier, the PDCCH is scrambled by TPC-PUCCH-RNTI; for the TPC information of the uplink channel PUSCH of the uplink carrier, the PDCCH is scrambled by TPC-PUSCH-RNTI to distinguish whether the TPC information is corresponding The uplink PUCCH channel is still the PUSCH channel. And for the TPC information of the PUCCH of the two uplink carriers, the TPC-PUCCH-RNTI is the same; for the TPC information of the PUSCH of the two uplink carriers, the TPC-PUSCH-RNTI is also the same.

After receiving the PDCCH information delivered by the base station, the UE first descrambles the PDCCH according to the scrambling code. If the descrambling is correct, first obtain the TPC information of the uplink channel of one of the carriers according to the position indicated by tpc-index 1, and then obtain the TPC information of the uplink channel of the other carrier according to the segment identifier and tpc-index 2.

It should be noted that: the position of the segment identifier can be set arbitrarily, that is, it can be set at any position of the PDCCH information; and the number of bits occupied by the segment identifier can be changed, that is, a certain bit can be used for indication, or Segmentation can be carried out according to a certain number of information bits (the bit information does not need to be displayed for indication, for example: 1-15 information bits correspond to a certain carrier, and the following information bits correspond to another uplink carrier, between 15 and 15 A segment identifier is added between the 16 information bits).

After implementing the technical solution in this embodiment, since CIF is no longer used for carrier indication, the increase of control signaling overhead is avoided; in addition, for the TPC information of the PUSCH channels of two uplink carriers, TPC-TPC-PUSCH-RNTI The same; TPC-TPC-PUCCH-RNTI is the same for the TPC information of the PUCCH channels of the two uplink carriers, thus reducing the complexity of blind detection of the PDCCH by the UE.

For the two uplink carriers of the UE, the same tpc-index can be allocated for indexing (as shown in the left figure of FIG. 6 ), or different tpc-indexes can be allocated for indexing (as shown in the right figure of FIG. 6 ). For more than two uplink carriers, multiple segment identifiers can be used. For example, if one uses three uplink carriers, two segment identifiers can be used in the PDCCH; four uplink carriers can use three segment identifiers. I won't repeat them here. Using the same tpc-index can reduce the number of parameters sent by the base station or RNC-radio network control; and using different tpc-index can make the TPC information of the uplink channel carrying different uplink carriers of the UE more flexible.

Embodiment Four

On the basis of the third embodiment, the base station changes the segment identifier in the PDCCH to CIF information when performing semi-static data scheduling. In FIG. 7 , the number of UE carrier aggregation is 2, and the TPC information of the uplink channel PUCCH/PUSCH of each uplink carrier is carried and transmitted by using the same PDCCH. When performing semi-static data scheduling, the base station can add CIF at a fixed position between PDCCHs for TPC information of different uplink carriers. The TPC information before the CIF corresponds to a certain uplink carrier, and uses the parameter tpc-index 1 to indicate which position is the TPC information of the UE; the TPC information after the CIF corresponds to another uplink carrier, and uses The parameter tpc-index 2 indicates which position is the TPC information of the UE. For the two uplink carriers of the UE, the same tpc-index can be assigned to indicate TPC information (shown in the left figure of Figure 7), or different tpc-index can be allocated to indicate TPC information (shown in the right figure of Figure 7 Show). For the TPC information of the uplink PUCCH, the PDCCH is scrambled by TPC-PUCCH-RNTI; for the TPC information of the uplink PUSCH, the PDCCH is scrambled by the TPC-PUSCH-RNTI to distinguish whether the TPC information corresponds to the uplink PUCCH channel or the PUSCH channel . The TPC information of the PUCCH and the PUSCH is notified to the UE through the bearer transmission of the PDCCH. And the TPC information corresponding to the uplink PUCCH channels of the two uplink carriers, TPC-PUCCH-RNTI is the same; the TPC information corresponding to the uplink PUSCH channels of the two uplink carriers, TPC-PUSCH-RNTI is also the same.

After receiving the PDCCH information delivered by the base station, the UE first descrambles the PDCCH according to the scrambling code. If the descrambling is consistent, first obtain the TPC information of the uplink channel of one carrier according to the position indicated by tpc-index 1, and then obtain the TPC information of the uplink channel of the other carrier according to CIF and tpc-index 2.

Similarly, the above technical solution is also applicable to the case where the number of carriers is more than two, so it will not be repeated here.

In the case that the number of carriers aggregated by the UE is N, compared with the prior art, N-1 CIFs need to be added in the technical solution in Embodiment 4, and one CIF information is less than that of the prior art. Since the number of TPC-PUCCH-RNTI and TPC-PUSCH-RNTI is reduced, and the CIF information used in the prior art is less, it not only reduces the complexity of UE blind detection, but also reduces the overhead of control signaling.

Referring to FIG. 8 , it is a schematic structural diagram of a device for transmitting a transmission power control command according to the present invention, and the device includes a transmitting end and a receiving end respectively.

The base station or the RNC-radio network control sends the parameter tpc-index related to the uplink transmission power control command to the UE. Set the same tpc-index or different tpc-index.

The sending end includes a control module 801 and a scrambling module 802 .

The control module 801 carries and transmits the TPC information of the uplink channel of each uplink carrier on the PDCCH according to a predetermined order and position; it is used to continuously carry or discontinuously carry the TPC information on the PDCCH according to the number of carriers, but carry according to a preset rule, And the number of bits of the TPC information is the same; a segment identifier is set between carriers, and the segment identifier sequentially distinguishes the starting position of the tpc-index; a CIF is set between carriers, and the CIF distinguishes the tpc - the starting position of index; when there are at least two TPC-PUSCH-RNTIs, the control module 801 sets the TPC-PUSCH-RNTIs to be the same; when there are at least two TPC-PUCCH-RNTIs, the control module 801 sets The TPC-PUCCH-RNTI is the same.

The scrambling module 802, for the TPC information of the PUSCH, uses the TPC-PUSCH-RNTI to scramble the PDCCH; for the PUCCH TPC information, uses the TPC-PUCCH-RNTI to scramble the PDCCH;

The receiving end includes a descrambling module 803 and a message module 804 .

The descrambling module 803 uses TPC-PUSCH-RNTI to descramble the PDCCH, and uses TPC-PUCCH-RNTI to descramble the PDCCH;

In the message module 804, the receiving end uses the tpc-index index to the position corresponding to the TPC information on the PDCCH, and further carries the TPC information in a predetermined order to obtain the TPC information.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. A method for transmission power control command transmission, base station or radio resource controller RNC-radionetwork control issues the parameter tpc-index relevant with uplink transmission power control command for terminal UE, it is characterized in that, the method comprises: The physical downlink control channel PDCCH bears and transmits the transmission power control TPC information of the uplink channel of each uplink carrier according to the predetermined sequence and position; The carrying according to the predetermined order and position includes carrying sequentially according to the number of carriers, the number of bits of the TPC information is the same, and the interval between adjacent carriers is the same; For the TPC information of the physical uplink shared channel PUSCH, use the physical uplink shared channel scrambling code TPC-PUSCH-RNTI to scramble the PDCCH; for the TPC information of the physical uplink control channel PUCCH, use the physical uplink control channel scrambling code TPC-PUCCH-RNTI Scrambling the PDCCH and sending the PDCCH to the UE. 2 . The method for transmitting a transmission power control command according to claim 1 , wherein the uplink carriers further include a segment identifier, and the segment identifier distinguishes the starting position of the tpc-index. 3 . 3 . The method for transmitting a transmission power control command according to claim 1 , wherein the uplink carriers further include carrier indication information (CIF), and the CIF distinguishes the starting position of the tpc-index. 4 . 4. according to the method for transmission power control command transmission described in claim 2 or 3, it is characterized in that, when TPC-PUSCH-RNTI has at least two, described TPC-PUSCH-RNTI is identical, when TPC-PUCCH-RNTI has at least two Two, the TPC-PUCCH-RNTI is the same. 5. The method for transmitting a transmission power control command according to any one of claims 1-4, wherein the tpc-index is the same. 6. The method for transmitting a transmission power control command according to any one of claims 1-4, wherein the tpc-index is different. 7. A device for transmission power control command transmission, the base station or the radio resource controller RNC-radionetwork control issues and uplink transmission power control parameter tpc-index for the terminal UE, it is characterized in that the device includes: At the sending end, the transmission power control TPC information of the uplink channel of each uplink carrier is carried and transmitted on the physical downlink control channel PDCCH according to the predetermined order and position; for the TPC information of the physical uplink shared channel PUSCH, the physical uplink shared channel is used to scramble the code TPC-PUSCH -RNTI scrambles the PDCCH; for the TPC information of the physical uplink control channel PUCCH, uses the physical uplink control channel scrambling code TPC-PUCCH-RNTI to scramble the PDCCH; The receiving end uses TPC-PUSCH-RNTI to descramble the PDCCH, and uses TPC-PUCCH-RNTI to descramble the PDCCH, and the receiving end uses the tpc-index index to the position corresponding to the TPC information on the PDCCH , further obtaining the TPC information according to a predetermined sequence; The sender includes, The control module carries and transmits the TPC information of the uplink channel of each carrier in the uplink according to the predetermined sequence and position on the PDCCH; The scrambling module, for the TPC information of the PUSCH, scrambles the PDCCH by using TPC-PUSCH-RNTI; for the TPC information of the PUCCH, uses TPC-PUCCH-RNTI to scramble the PDCCH; The receiver includes, The descrambling module uses TPC-PUSCH-RNTI to descramble the PDCCH, and uses TPC-PUCCH-RNTI to descramble the PDCCH; A message module, indexed by the tpc-index to the position corresponding to the TPC information of the receiving end on the PDCCH, and further carrying the TPC information in a predetermined order to obtain the TPC information; The control module is configured to control the PDCCH to carry sequentially according to the number of carriers, the number of bits of the TPC information is the same, and the interval between adjacent carriers is the same. 8. The device for transmitting a transmission power control command according to claim 7, wherein the control module is further configured to set a segment identifier between uplink carriers, and the segment identifier distinguishes the tpc-index starting point. 9. The device for transmitting a transmission power control command according to claim 7, wherein the control module is further configured to set carrier indication information (CIF) between uplink carriers, and the CIF distinguishes the origin of the tpc-index start position. 10. The device for transmitting a transmission power control command according to claim 7 or 8, wherein the control module is further configured to, when there are at least two TPC-PUSCH-RNTIs, set the TPC-PUSCH-RNTIs to be the same , when there are at least two TPC-PUCCH-RNTIs, set the TPC-PUCCH-RNTIs to be the same.

Images