CN101197598B - Power control method in multi-carrier frequency time division multiplex code division multiple access system - Google Patents
Power control method in multi-carrier frequency time division multiplex code division multiple access system Download PDFInfo
- Publication number
- CN101197598B CN101197598B CN200610161063.0A CN200610161063A CN101197598B CN 101197598 B CN101197598 B CN 101197598B CN 200610161063 A CN200610161063 A CN 200610161063A CN 101197598 B CN101197598 B CN 101197598B
- Authority
- CN
- China
- Prior art keywords
- time slot
- carrier frequency
- power control
- control method
- multiple access
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Mobile Radio Communication Systems (AREA)
Abstract
The invention provides a power control method in multi-carrier time division multiplexing code frequency division multiple access system, which can configure at least two carriers to at least one time slot signal with different transferring directions. The invention comprises the following steps: time slot transferring points of at least two carrier frequencies are configured in a staggering manner, one testing result of at least two carrier frequencies is sent to the opposite terminal from the other carrier frequency. Therefore, when the cell is configured with the multi-carriers, the quick close power control can be achieved on the time slot, so that the close power control time delay can be shortened, the fast fading can be tracked and the signal quality can be improved.
Description
Technical field
The present invention relates to a kind of method for the rapid power control in multi-carrier frequency time division multiplex code division multiple access (TD-SCDMA) system in 3G (Third Generation) Moblie, more specifically, a kind of method of the rapid power control for multi-carrier frequency cell and multi-carrier frequency cell phone system is related to.
Background technology
TD-SCDMA is a kind of interference limiting system, and in same frequency, this system has a lot of subscriber equipment (UE) receiving and transmitting signals.In order to reduce interference when receiving and transmitting signal, must control transmitting power.In addition, in order to resist the signal fadeout in wireless transmission environments, must power control be carried out, especially in the fast-changing environment of the signal fadeout faced by fast moving user, more will carry out power control.The main power control device of TD-SCDMA is closed-loop power control, closed-loop power control is to liking DPCH (DPCH), Physical Downlink Shared Channel (PDSCH) and up shared physical channel (PUSCH) three kinds of physical channels, and basic process is that recipient compares and measures the signal interference ratio (SIR obtained
est) and the target signal interference ratio (SIR that pre-sets
target), then in time slot (TS), transmitting power controls (TPC) order, and notice transmitting terminal increases or reduces transmitting power.
At present, in the realization of multi-carrier frequency cell, the position of the time slot transfer point in the subframe of all carrier frequency is all identical, and the signal transmission direction of all carrier frequency in same time slot is identical.When carrying out uplink closed-loop power control, mobile phone transmits in an ascending time slot, base station is measured it, the result measured is to issue mobile phone in the descending time slot of the form of TPC command below, adjust in the transmitting power of next subframe to this ascending time slot after mobile phone receives this TPC command, producing from measurement result the delay that power control commands comes into force is subframe, namely a 5ms, that is, closed-loop power control time delay at least needs 5ms.
So long closed-loop power control time delay has a strong impact on the bandwidth of the user of high-speed mobile.Therefore, in order to overcome the problems referred to above, the invention provides the circule power control method in a kind of multi-carrier frequency time division multiplex code division multiple access system.
Summary of the invention
In order to the problem that the bandwidth solving high velocity mobile users affects by rapid fading, the invention provides the circule power control method in a kind of multi-carrier frequency time division multiplex code division multiple access system.Interlocked by multi-carrier frequency system time slot transfer point, the time delay of closed-loop power control can be shortened, follow the tracks of rapid fading, improve signal quality.May be simultaneously operated in the mobile phone on two carrier frequency for one, its closed-loop power control time delay can reduce to 1.35ms.
One aspect of the present invention provides the circule power control method in a kind of multi-carrier frequency time division multiplex code division multiple access system, and at least two carrier configurations are the signal transmission direction difference at least in a time slot by it.
According to an aspect of the present invention, the method comprises the following steps: be in staggered configuration by the time slot transfer point of at least two carrier frequency, and the measurement result of the carrier frequency of at least two carrier frequency is sent to transmitting terminal with the form of emissive power control command on another carrier frequency.
Method according to one aspect of the invention comprises the following steps: step S 102, when configuring the time slot transfer point of at least two carrier frequency, according to pre-defined rule interlaced arrangement ascending time slot and descending time slot; And step S 104, when transmitting in ascending time slot and descending time slot one of transmitting terminal, recipient measures transmitting, and by measurement result to issue transmitting terminal in another in the ascending time slot of the form of emissive power control command below and descending time slot.
Be existing ascending time slot within the time of two or more time slots according to the pre-defined rule of one aspect of the invention, also have descending time slot.
After receiving emissive power control command, the transmitting power when next time slot is adjusted according to the transmitting terminal of one aspect of the invention.
According to an aspect of the present invention, multi-carrier frequency time division multiplex code division multiple access system is time division multiplex code division multiple access system more than two carrier frequency time division multiplex code division multiple access systems or two carrier frequency.
Circule power control method in multi-carrier frequency time division multiplex code division multiple access system proposed by the invention, when configuring the time slot transfer point of different carrier frequency, by reasonably interlock ascending time slot and descending time slot, make measurement result can control its transmitting power to signal transmitting terminal by rapid feedback, thus realize rapid power control, therefore, it is possible to better follow the tracks of fast-fading, support the service of fast moving user.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart of the circule power control method in multi-carrier frequency time division multiplex code division multiple access system of the present invention;
Fig. 2 is the view according to the circule power control method in two carrier frequency time division multiplex code division multiple access systems of the embodiment of the present invention; And
Fig. 3 is the view according to the circule power control method in three carrier frequency time division multiplex code division multiple access systems of the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
At least two carrier configurations are that the signal transmission direction at least in a time slot is different by the circule power control method in multi-carrier frequency time division multiplex code division multiple access system, it comprises the following steps: be in staggered configuration by the time slot transfer point of at least two carrier frequency, and the measurement result of the carrier frequency of at least two carrier frequency is sent to opposite end on another carrier frequency.
Fig. 1 is the flow chart according to the circule power control method in multi-carrier frequency time division multiplex code division multiple access system of the present invention.As shown in Figure 1, the circule power control method in multi-carrier frequency time division multiplex code division multiple access system comprises the following steps:
(1) step S102, when configuring the time slot transfer point of at least two carrier frequency, according to pre-defined rule interlaced arrangement ascending time slot and descending time slot, wherein, pre-defined rule is existing ascending time slot within the time of two or more time slots, also has descending time slot;
(2) step S104, when transmitting in ascending time slot and descending time slot one of subscriber equipment, base station is measured transmitting, and by measurement result to issue subscriber equipment in another in the ascending time slot of the form of emissive power control command below and descending time slot, wherein, subscriber equipment adjusts the transmitting power when next time slot after receiving emissive power control command.
In the present invention, multi-carrier frequency time division multiplex code division multiple access system is time division multiplex code division multiple access system more than two carrier frequency time division multiplex code division multiple access systems or two carrier frequency.
Fig. 2 is the view of the circule power control method according to an embodiment of the invention in two carrier frequency time division multiplex code division multiple access systems.
As shown in Figure 2, this cell configuration two carrier frequency, wherein, the time slot transfer point of two carrier frequency f1 and f2 is respectively between TS2-TS3 and between TS4-TS5.
If the time slot transfer point of two carrier frequency is different, within the time of two or more time slots, existing ascending time slot also has descending time slot, and this point just can be utilized in a subframe, to transmit TPC command and come into force.
Hereinafter, for uplink closed-loop power control, when TS2, radio network controller (RNC) is measured the carrier frequency f2 being in uplink state, when TS3, carrier frequency f1 is in downstream state, RNC issues UE by carrier frequency f1 TPC command, and UE adjusts the transmitting power of carrier frequency f2 when TS4 after receiving the TPC that carrier frequency f1 transmits.Like this, producing from measurement result the delay that power control commands comes into force is two time slots, that is the time delay that power controls is reduced to two time slots, i.e. 1.35ms.
Fig. 3 is the view of the circule power control method according to an embodiment of the invention in three carrier frequency time division multiplex code division multiple access systems.
As shown in Figure 3, this community is provided with three carrier waves.Wherein, the time slot TS2-TS6 of carrier frequency f2 is all configured to descending time slot, and the time slot TS2-TS6 of carrier frequency f3 is all configured to ascending time slot, and the time slot indicating TPC arrow points in figure has carried out rapid power control.To the uplink power control of carrier frequency f3, can control slot TS 1, TS3, TS4, TS5 and TS6.Also the flow process sent out mutually is had to the downlink power control of carrier frequency f2, at most can control slot TS0, TS2, TS3, TS4, TS5 and TS6.Like this, 11 are just had can to carry out rapid power control in 14 time slots of carrier frequency f2 and f3.
By above description of the invention, can see that the present invention realizes following beneficial effect: when allocating multiple carrier-frequency domain, be staggered, in the measurement result of a carrier frequency by the time slot transfer point different carrier frequency, another carrier frequency issues opposite end, and the fast closed-loop power that can realize time slot controls.Thus, the time delay of closed-loop power control can be shortened, follow the tracks of rapid fading, improve signal quality.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. the circule power control method in a multi-carrier frequency time division multiplex code division multiple access system, it is characterized in that, it is the signal transmission direction difference at least in a time slot by least two carrier configurations, the time slot transfer point of described at least two carrier frequency is in staggered configuration, the measurement result of a carrier frequency in described at least two carrier frequency is sent to transmitting terminal with the form of emissive power control command on another carrier frequency.
2. circule power control method according to claim 1, is characterized in that, comprises the following steps:
Step S102, when the time slot transfer point of at least two carrier frequency described in configuring, according to pre-defined rule interlaced arrangement ascending time slot and descending time slot; And
Step S104, when transmitting in described ascending time slot and described descending time slot one of described transmitting terminal, recipient measures described transmitting, and by measurement result to issue described transmitting terminal in another in the described ascending time slot of the form of emissive power control command below and described descending time slot.
3. circule power control method according to claim 2, is characterized in that, described pre-defined rule is existing ascending time slot within the time of two or more time slot, also has descending time slot.
4. the circule power control method according to Claims 2 or 3, is characterized in that, described transmitting terminal adjusts the transmitting power when next time slot after receiving described emissive power control command.
5. circule power control method according to any one of claim 1 to 3, is characterized in that, described multi-carrier frequency time division multiplex code division multiple access system is the time division multiplex code division multiple access system of more than two carrier frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610161063.0A CN101197598B (en) | 2006-12-04 | 2006-12-04 | Power control method in multi-carrier frequency time division multiplex code division multiple access system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610161063.0A CN101197598B (en) | 2006-12-04 | 2006-12-04 | Power control method in multi-carrier frequency time division multiplex code division multiple access system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101197598A CN101197598A (en) | 2008-06-11 |
| CN101197598B true CN101197598B (en) | 2015-06-03 |
Family
ID=39547778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610161063.0A Active CN101197598B (en) | 2006-12-04 | 2006-12-04 | Power control method in multi-carrier frequency time division multiplex code division multiple access system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101197598B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101895307B (en) * | 2009-05-22 | 2013-08-21 | 傲世通科技（苏州）有限公司 | Frequency scanning method for time division-synchronization code division multiple access (TD-SCDMA) system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1719935A (en) * | 2004-07-09 | 2006-01-11 | 中兴通讯股份有限公司 | Auxiliary carrier signal quality estimating and carrier selecting method for TD-SCDMA system |
| CN1750702A (en) * | 2004-09-13 | 2006-03-22 | 大唐移动通信设备有限公司 | Method for flexibly supporting asymmetric service of multiple carrier time division duplex mobiole communication system |
-
2006
- 2006-12-04 CN CN200610161063.0A patent/CN101197598B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1719935A (en) * | 2004-07-09 | 2006-01-11 | 中兴通讯股份有限公司 | Auxiliary carrier signal quality estimating and carrier selecting method for TD-SCDMA system |
| CN1750702A (en) * | 2004-09-13 | 2006-03-22 | 大唐移动通信设备有限公司 | Method for flexibly supporting asymmetric service of multiple carrier time division duplex mobiole communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101197598A (en) | 2008-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11317355B2 (en) | System and method for wireless power control | |
| CN108934188B (en) | Interference measurement method and related equipment | |
| Li et al. | Full-duplex cellular networks | |
| EP2264912B1 (en) | Method and system for suppression of interferences between cells | |
| CN101044700B (en) | Apparatus and method for adaptively changing uplink power control scheme according to mobile status in a tdd mobile communication system | |
| CN201893939U (en) | Wireless transmitting/receiving unit (WTRU) | |
| CN108924920B (en) | Method for determining and configuring transmission power, terminal and base station | |
| CN102118756B (en) | Carrier aggregation method and dynamic spectrum allocation method | |
| CN100459755C (en) | Mobile terminal with power control and method | |
| US9532314B2 (en) | Method and apparatus for uplink transmission power control of multi-link connections | |
| EP2002562B1 (en) | Radio coverage enhancement | |
| KR101616155B1 (en) | Radio communication device and control method | |
| CN101610104B (en) | Method and device for distributing power of user dedicated reference symbols | |
| CN109314934B (en) | Power control method and related equipment | |
| JP4904437B2 (en) | Base station apparatus, mobile station apparatus, radio communication system, program, and integrated circuit | |
| CN101860947B (en) | Method and equipment for multi-carrier uplink power control | |
| CN102714867A (en) | System and method for scheduling users on a wireless network | |
| CN101222253B (en) | Opened loop power control method | |
| CN101197598B (en) | Power control method in multi-carrier frequency time division multiplex code division multiple access system | |
| US20120003985A1 (en) | Co-channel interference reduction in femtocell networks | |
| CN101197597A (en) | Power control device in multi-carrier frequency time division multiplex code division multiple access system | |
| CN101197596A (en) | Power control method and device | |
| CN1816199A (en) | Method for reducing small-region interference in time-division synchronous CDMA accessing system | |
| US20220110064A1 (en) | Systems and methods for high power uplink transmission | |
| KR20190000961A (en) | Method for transmitting multiple beam in radio communication system based on beam-forming |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |