WO2014173210A1

WO2014173210A1 - Method and device for transmitting downlink dedicated physical channel

Info

Publication number: WO2014173210A1
Application number: PCT/CN2014/073282
Authority: WO
Inventors: 孙国平; 宋廷山; 余擎旗
Original assignee: 中兴通讯股份有限公司
Priority date: 2013-04-23
Filing date: 2014-03-12
Publication date: 2014-10-30
Also published as: CN104125627B; CN104125627A

Abstract

A method and a device for transmitting a downlink dedicated physical channel (DPCH). The method comprises: determining whether a preset condition is met; if yes, performing processing of discontinuously sending a pilot of a pilot domain of a DPCH; and otherwise, continuously sending the pilot of the pilot domain of the DPCH.

Description

Method and device for downlink dedicated physical channel transmission

The field of mobile communication systems, and in particular, a method for downlink dedicated physical channel (DPCH) transmission and

Background technique

At present, how to effectively reduce the power consumption of the base station equipment has been a problem and operators concerned, therefore ^{3GPP (The 3 rd Generation Partnership Project} , Third Generation Partnership Project) protocol version is given in R7 downside CPC (continuous packet Connectivity, continuous packet connection technology, which saves the base station side transmit power and improves the system capacity through downlink discontinuous transmission. However, the protocol-defined CPC function can only be used in pure HSPA (High-Speed Packet Access). Incoming/access technology can only be used, that is, the F-DPCH (Fractional Dedicated Physical Channel) is used in the downlink. This function requires terminal support of R7 and above versions. At present, there are many common 3GPP protocols for the R99, R5 and R6 versions of the commercial network. These terminals do not support the CPC function. Therefore, based on the current status, there is no similar technology for these terminals to save the power of the base station. , can only use continuous transmission mode.

Summary of the invention

Embodiments of the present invention provide a downlink dedicated physical channel (DPCH) transmission method and apparatus to save power of a base station.

An embodiment of the present invention provides a method for transmitting a downlink dedicated physical channel, including: determining whether a predetermined condition is met;

If the predetermined condition is satisfied, the pilot of the pilot domain of the downlink dedicated physical channel is discontinuously transmitted, and if the predetermined condition is not satisfied, the pilot of the pilot domain of the downlink dedicated physical channel is continuously transmitted.

Optionally, the foregoing method further has the following features: the processing of performing pilots of the pilot domain of the downlink dedicated physical channel discontinuously, including: Transmitting a pilot of a pilot domain of a downlink dedicated physical channel periodically during a specified period, and performing downlink inner loop power control during the specified period;

During the period in which the pilot of the pilot domain of the downlink dedicated physical channel is not transmitted in the period, the uplink power control command is masked, and the downlink inner loop power control is not performed.

Optionally, the foregoing method further has the following features: the predetermined condition includes:

The user service is at least one of a R99 data service and a high speed downlink packet access service carried by the associated channel on a dedicated physical channel, and the data field of the dedicated physical channel has no data to be transmitted.

Optionally, the foregoing method further has the following features: in the process of performing the process of continuously transmitting the pilot of the pilot domain of the downlink dedicated physical channel, including:

For example, if the data field of the dedicated physical channel is to be transmitted, the preamble for adjusting the power control is transmitted in a period specified before the data is transmitted, and the pilot of the pilot domain of the downlink dedicated physical channel is continuously transmitted after the preamble is transmitted.

An embodiment of the present invention further provides an apparatus for processing downlink dedicated physical channel transmission, including: a first module, configured to determine whether a predetermined condition is met;

a second module, configured to perform a process of discontinuously transmitting a pilot of a pilot domain of a downlink dedicated physical channel if the first module determines that the predetermined condition is met;

And a third module, configured to continuously transmit a pilot of a pilot domain of the downlink dedicated physical channel if the first module determines that the predetermined condition is not met.

Optionally, the foregoing apparatus further has the following features: the second module includes:

a first unit, configured to, when the first module determines that the predetermined condition is met, periodically transmit a pilot of a pilot domain of a downlink dedicated physical channel within a specified period, and perform downlink inner loop power control during the specified period ; as well as

The second unit is configured to mask the uplink power control command during the period in which the pilot of the pilot domain of the downlink dedicated physical channel is not transmitted during the period, and does not perform downlink inner loop power control.

Optionally, the foregoing device further has the following features: the predetermined condition includes:

The user service is at least one of the R99 data service and the high speed downlink packet access service carried by the associated channel on the dedicated physical channel, and the data domain of the dedicated physical channel has no data to be transmitted. Optionally, the foregoing apparatus further has the following features: the second module further includes: a third unit, configured to determine whether a data field of the dedicated physical channel has data to be sent, and if the data to be sent is sent before the data is sent Sending a preamble for adjusting power control in advance of a specified period, and notifying the third module;

The third module is further configured to continuously transmit pilots of the pilot domain of the downlink dedicated physical channel upon receipt of the notification.

In summary, the embodiments of the present invention provide a downlink dedicated physical channel (DPCH) transmission method and device, which can save power of a base station. BRIEF abstract

1 is a flowchart of a method for downlink DPCH transmission according to an embodiment of the present invention;

2 is a schematic diagram of a DPCH channel structure defined in the 3GPP protocol;

3 is a schematic diagram of a downlink DPCH Pilot domain discontinuous transmission mode according to an embodiment of the present invention; FIG. 4 is a schematic diagram of mutual conversion between a downlink DPCH Pilot domain discontinuous transmission mode and a continuous transmission mode according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of an apparatus for processing a downlink DPCH according to an embodiment of the present invention. Preferred embodiment of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

FIG. 1 is a flowchart of a method for downlink DPCH transmission according to an embodiment of the present invention. As shown in FIG. 1, the method in this embodiment includes:

Sl l, determine whether the predetermined condition is met, if the predetermined condition is met, then go to step S12, otherwise go to step S13;

S12. Perform a process of discontinuously transmitting pilots of a pilot domain of a downlink dedicated physical channel.

S13. Continuously transmit pilots of a pilot domain of a downlink dedicated physical channel.

According to the method of the embodiment of the present invention, when the downlink DPCH pilot domain is discontinuously transmitted, when The pre-defined termination condition stops transmitting the pilot domain of the DPCH until the pre-defined starting condition is met, and the transmission is resumed, which can save the transmission power of the downlink dedicated physical channel, thereby increasing the system capacity.

For example, the mode for defining the discontinuous transmission of the DPCH pilot domain is DL-Pilot-DTX, and the base station determines whether the DPCH pilot domain enters the discontinuous transmission mode by whether DL-Pilot-DTX-Active is activated.

DL—Pilot—DTX—Active is true (true) and needs to meet the following conditions: 1. The user's service is pure data service, and it is RSD data service or HSDPA (High Speed Downlink Packet Access, high speed with accompanying channel carried on DPCH). The downlink packet access service is either a mixture of the two services; 2. The base station supports the DPCH discontinuous transmission mode; 3. The data of the DPCH has no data transmission; otherwise, the DL_Pilot_DTX_Active is false (false).

The upper layer defines the pilot domain discontinuous transmission (DL-Pilot-DTX) process by the following parameters.

Pilot—DTX—Cycle: The period of the downlink DPCH pilot domain burst pattern, usually in frames or time slots.

DL—Pilot—DTX deactivation: When the Data field of the DPCH has data, it is converted from the discontinuous transmission mode of the DPCH pilot domain to the continuous transmission mode, and DL—Pilot—DTX—Active is set to false.

Pilot—DTX_preamble—length: The length of the preamble that the DPCH pilot field needs to send in advance when data is sent in the Data field of the DPCH, usually in slots.

The preamble is mainly used to adjust the power control. During the transmission of the preamble, no data is transmitted, but the downlink power control is performed, so that the power control can keep up with the channel change when the data is transmitted, so as to control the SIR (Signal to Interference Ratio). ), how many time slots and data delay times in advance are related to performance requirements, which can be determined by simulation or testing.

Pilot—DTX—burst: The burst length of the downlink DPCH pilot domain under Pilot-DTX—Cycle, usually in frames.

When DL-Pilot-DTX-Active is true, the base station performs the following operations:

The Pilot of the DPCH is only transmitted during the burst, and the length of the transmission is Pilot_DTX_burst. During this period, the inner loop power control is performed in the downlink; The length of the Pilot domain gap (gap) of the DPCH is:

Pilot — DTX — Cycle-Pilot — DTX — burst;

In the gap time, the uplink TPC (power control command) is masked, and the downlink inner loop power control is not performed.

For example, the frame number C of the first burst satisfies the following conditions:

C mod Pilot — DTX— Cycle == 0;

The period is in units of frames, indicating that the burst is in the front part of the period, that is, the pilot of the pilot domain of the DPCH is transmitted at the beginning of the period of the Pilot-DTX-Cycle. Of course, it can also be at other times during this period. As long as it is sent periodically.

If the Data field of the DPCH has data transmission starting at time slot S, then

The S-Pilot_DTX_preamble_length sends a preamble, and the base station knows that the data field is to be transmitted in the time slot S. At this time, the preamble is transmitted in advance of the time slot S in advance of Pilot_DTX_preamble_length. It can also be said that the base station knows that there is Data in Slot A. The domain has data to send. At this point, the preamble is sent. The length of the transmission is Pilot_DTX_preamble_length. After the preamble is sent, it enters the DPCH Pilot domain continuous transmission mode and starts to send data. At this point, enter the DPCH Pilot domain continuous transmission mode, continuously send the DPCH Pilot domain and use the uplink TPC command to do the downlink inner loop power control until the data domain has no data.

In the slots where burst and preamble start, the way of downlink power control may be different from the protocol, for example, using smaller steps or ignoring several TPC commands.

For the R99 service, the service is carried on the DPDCH (Dedicated Physical Data Channel), the control information is carried on the DPCCH (Dedicated Physical Control Channel), and the DPDCH and the DPCCH are time-division multiplexed to form the downlink dedicated physical channel. (DPCH), as shown in FIG. 2, where TPC is an inner loop power control command, TFCI is a transport format combination indication, Pilot is a pilot, and Data is data information. When there are few data channel services, at this time, the DPCH basically sends control information, namely TPC, TFCI, Pilot.

For the HSDPA service that carries the channel in the DPCH, the service is carried in the HSDPA, and the signaling is carried in the Data field of the DPCH. When doing the service, the signaling is generally less. The DPCH is basically sending TPC, TFCI, and Pilot. Figure 2 shows the channel structure of the DPCH in the 3GPP protocol. The DPCH radio frame length is 10ms, including 15 slots, each slot has DPDCH and DPCCH, DPCCH is the control channel, including TPC, TFCI and Pilot domain, DPDCH is Data channel, including the Data field.

3 is a schematic diagram showing downlink transmission of the DL-Pilot-DTX mode in the embodiment of the present invention. As shown in FIG. 3, when entering the DL Pilot DTX mode, DL-Pilot-DTX-Active is true, and The initial CFN (Connection Frame Number) C satisfies (C mod Pilot- DTX— Cycle ) ==0 into the burst, and starts to transmit the pilot of the pilot domain of the DPCH. The duration is Pilot — DTX — burst For example, 1 frame, at this time, the pilot of the pilot domain of the DPCH is transmitted, and the downlink is used for power control, and then enters the gap. During this period, the pilot of the pilot domain of the DPCH is not transmitted, and the duration of the duration is Pilot_DTX- Cycle (for example, 4 frames) minus Pilot_DTX_burst, at this time, the upstream TPC command is masked, and downlink power control is not performed. At the same time, the pilot of the pilot domain of the DPCH is not transmitted; later, when the CFN satisfies the CFN mod Pilot — DTX— Cycle==0, send burst, duration Pilot — DTX — burst.

Figure 4 shows a schematic diagram of an embodiment of a downlink DPCH Pilot domain discontinuous transmission mode and continuous transmission mode transition, including the following steps:

Step 301: When DL_Pilot_DTX_Active is true and the CFN satisfies (CFN mod Pilot_DTX_Cycle) ==0, the burst is entered, and the pilot of the pilot domain of the DPCH is started to be transmitted, and the duration is Pilot_DTX_burst, DPCH The pilot of the pilot domain is normally transmitted, and downlink power control is performed;

Step 302: Then enter the gap. At this time, the pilot of the pilot domain of the DPCH is not sent, and the uplink TPC command is blocked, and the downlink inner loop power control is not performed.

Step 303: When there is data to be sent in the DPCH Data field at time T, and it is determined to be sent in slot S (the base station can know by means of high-level notification or the like, or set the time for data transmission by itself), then DL-Pilot-DTX is deactivated. DL—Pilot—DTX—Active is false, and the preamble is sent in S-Pilot_DTX_preamble_length, and the pilot continuous transmission mode is entered until the data transmission in the DPCH Data field is completed;

Step 304: At this time, the Pilot field of the DPCH needs to be transmitted, and the downlink power control is performed by using the TPC command reported by the uplink, and the data is transmitted in the slot S, and the Pilot field of the DPCH is continuously transmitted, and the TPC command reported by the uplink is used for downlink power control. ; Step 305: After the data is sent, determine whether to activate DL-Pilot-DTX-Active in the next slot.

Step 306: After the condition is met, the activation is true, and then the DPCH Pilot DTX mode is transmitted, and the CFN of the first burst satisfies the condition (C mod Pilot_DTX_Cycle ) ==0.

In the case of a number of slots in the preamble and burst, the way of downlink power control may be different from the protocol, such as using smaller steps or ignoring several TPC commands.

FIG. 5 is a schematic diagram of an apparatus for processing a downlink DPCH according to an embodiment of the present invention. As shown in FIG. 5, the apparatus in this embodiment may include:

a first module 51, configured to determine whether a predetermined condition is met;

a second module 52, configured to perform, after the first module determines that the pilot of the pilot domain of the downlink dedicated physical channel is discontinuously transmitted;

The third module 53 is configured to continuously transmit the pilot of the pilot domain of the downlink dedicated physical channel if the first module determines that the content is not satisfied.

The second module may include:

a first unit 521, configured to periodically transmit a pilot of a pilot domain of a downlink dedicated physical channel within a specified period, and perform downlink inner loop power control within the specified period, if the first module determines that the content is satisfied;

The second unit 522 is configured to mask the uplink power control command and not perform the downlink inner loop power control during the period in which the pilot of the pilot domain of the downlink dedicated physical channel is not transmitted during the period.

The predetermined condition includes:

In a preferred embodiment, the second module may further include

The third unit 523 is configured to determine whether the data field of the dedicated physical channel has data to be sent, and if there is data to be sent, send a preamble for adjusting the power control in a period specified before the data is sent, and notify the first Three modules 53;

The third module 53 is further configured to continuously send the downlink dedicated physical channel after receiving the notification The pilot of the pilot domain.

The embodiments of the present invention may be implemented in a software system or may be implemented in hardware.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program instructing the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

The above is only a preferred embodiment of the present invention, and of course, the present invention may be embodied in various other embodiments without departing from the spirit and scope of the invention. Corresponding changes and modifications are intended to be included within the scope of the appended claims.

Industrial Applicability The embodiments of the present invention provide a downlink dedicated physical channel (DPCH) transmission method and apparatus, which can save power of a base station.

Claims

claims

1. A method for transmitting a downlink dedicated physical channel, including:

Determine whether predetermined conditions are met; and

If the predetermined conditions are met, the processing of discontinuously transmitting the pilots in the pilot domain of the downlink dedicated physical channel is performed. If the predetermined conditions are not met, the process of continuously transmitting the pilots in the pilot domain of the downlink dedicated physical channel is performed.

2. The method of claim 1, wherein: the processing of discontinuously transmitting pilots in the pilot domain of the downlink dedicated physical channel includes:

Periodically transmit the pilot in the pilot domain of the downlink dedicated physical channel within a specified period, and perform downlink inner loop power control within the specified period; and

During the period when the pilot in the pilot domain of the downlink dedicated physical channel is not sent within the period, the uplink power control command is shielded and downlink inner loop power control is not performed.

3. The method of claim 1, wherein the predetermined conditions include:

The user service is at least one of the R99 data service and the high-speed downlink packet access service carried by the accompanying channel on the dedicated physical channel, and the data domain of the dedicated physical channel has no data to be sent.

4. The method according to any one of claims 1 to 3, wherein the process of discontinuously transmitting pilots in the pilot domain of the downlink dedicated physical channel includes:

If it is determined that there is data to be sent in the data domain of the dedicated physical channel, a preamble for power control adjustment is sent at a specified period in advance before data is sent, and after the preamble is sent, the pilot in the pilot domain of the downlink dedicated physical channel is continuously sent.

5. A device for processing downlink dedicated physical channel transmission, including:

The first module is configured to determine whether predetermined conditions are met;

The second module is configured to perform the process of discontinuously transmitting pilots in the pilot domain of the downlink dedicated physical channel when the first module determines that predetermined conditions are met; and

The third module is configured to continuously send pilots in the pilot domain of the downlink dedicated physical channel when the first module determines that the predetermined conditions are not met.

6. The device of claim 5, wherein the second module includes:

The first unit is configured to periodically activate the Transmit pilots in the pilot domain of the downlink dedicated physical channel within a designated period, and perform downlink inner loop power control within the designated period; and

The second unit is configured to shield the uplink power control command and not perform downlink inner loop power control during the period when the pilot in the pilot domain of the downlink dedicated physical channel is not sent within the period.

7. The device according to claim 5, wherein the predetermined conditions include:

8. The device according to any one of claims 5 to 7, wherein the second module further includes a third unit configured to determine whether there is data to be sent in the data field of the dedicated physical channel. If there is data to be sent, Send, then send a preamble for adjusting power control at a specified period in advance before sending data, and notify the third module; and

The third module is further configured to continuously send pilots in the pilot domain of the downlink dedicated physical channel after receiving the notification.