CN101374009B - Method for switching business channel of relay network - Google Patents
Method for switching business channel of relay network Download PDFInfo
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- CN101374009B CN101374009B CN2007101957867A CN200710195786A CN101374009B CN 101374009 B CN101374009 B CN 101374009B CN 2007101957867 A CN2007101957867 A CN 2007101957867A CN 200710195786 A CN200710195786 A CN 200710195786A CN 101374009 B CN101374009 B CN 101374009B
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Abstract
A service channel switching method for a relay network comprises: a user terminal accesses to a base station and/or a relay station of a relay network, constructs a control channel and a service channel, and originating service; the user terminal performs computation of signal parameters or service channel parameters of the base station and/or the relay station providing the service channel and the signal parameters of the base station or the relay station capable of providing the service channel to obtain statistics of the parameters; and the reported statistics and corresponding thresholds are compared, when switching conditions are judged to be satisfied, the base station indicates the user terminal to construct the service channel of the base station or the relay station capable of providing the service channel, and the used service channel is switched to the newly constructed traffic channel or the original service channel and the newly constructed traffic channel are used at the same time. The inventive method makes full use of the service channel resources of the base station and the relay station, and improves the transmission speed and the quality of service (QoS) of the service data.
Description
Technical field
The present invention relates to a kind of Traffic Channel changing method of junction network.
Background technology
In follow-on cordless communication network, need to solve the problem that has defect area in the coverage of base station (Base Station is called for short BS), the zone of failing to be covered by base station is covered; And the capacity problem in base station range, comprise that the capacity between zones of different community in is allocated and adjacent cell in the allotment of capacity.The problems referred to above can not obtain effectively solving make in such as buildings such as subway stations, the indoor overlay models such as tunnel or other hypogee, and the problems such as the user's of the application model such as some interim application models and the mobile vehicles or cell edge covering and throughput are faced with formidable challenges.
At present, in the international standards such as IEEE (institute of Electrical and Electronic Engineers) 802.16J, all propose to adopt the mode of relay station (RS) to solve the covering of user in the scene that above-mentioned existence covers defect and the problem of capacity.With increase base station in having the zone that covers defect, compare, the use relay station has reduced the complexity that system starts, simultaneously by making the complexity that can further reduce whole system that minimizes of relay station complexity.
At present, the mode of operation of relay station can be divided into following two kinds:
(1) transparent relay pattern:
Downlink Control Information and data service are independent transmission, and wherein Downlink Control Information is directly from the base-station transmission to the user terminal, and without relay station; And data service can be transferred to user terminal by relay station.Relay station is not launched synchronous, system configuration and the information such as resource distribution of oneself in the downlink broadcast channel.That is to say, under the transparent relay pattern, control channel is provided by base station, and Traffic Channel is provided by relay station.
(2) nontransparent repeater mode
Downlink Control Information and data service all are transferred to user terminal by relay station, and relay station is launched oneself synchronous, system configuration and the information such as resource distribution in the downlink broadcast channel.That is to say, under nontransparent repeater mode, control channel and Traffic Channel are all provided by relay station.
Fig. 1 is the schematic diagram of the junction network that comprises a base station and two relay stations (relay station 1, relay station 2).In Fig. 1, in user terminal 1, the signal cover of 2 while of user terminal in base station and relay station 1; In the signal cover of 3 while of user terminal in base station and relay station 2.
In prior art, for each user terminal, control channel and Traffic Channel are determined when it accesses, and after determining, can not be switched.That is to say, in the situation in the signal cover of user terminal while in base station and relay station, if while accessing, definite Traffic Channel is provided by relay station, can't switch to by base station and provide, vice versa.This just can not reselect according to the variation of Traffic Channel preferably Traffic Channel, thereby provides better service for the user.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the deficiency of Traffic Channel changing method in prior art, and proposition can, after user terminal accesses and determines Traffic Channel, be carried out the dynamically Traffic Channel changing method of switching to the Traffic Channel of this user terminal.
In order to address the above problem, the invention provides a kind of Traffic Channel changing method of junction network, it is characterized in that, comprise the following steps:
A) base station and/or the relay station of user terminal access junction network, set up control channel and Traffic Channel and initiate business;
B) user terminal is to base station that Traffic Channel is provided or signal parameter or the Traffic Channel parameter of relay station, and can provide the base station of Traffic Channel or the signal parameter of relay station to be added up, and obtains the statistical value of described parameter;
C) statistical value relatively reported and respective threshold, when judgement meets switching condition, the base station that base station indicates this user terminal to be established to can to provide Traffic Channel or the Traffic Channel of relay station, be switched to the Traffic Channel of use newly-established Traffic Channel or use former Traffic Channel and newly-established Traffic Channel simultaneously.
In addition, step B), user terminal reports the statistical value obtained to base station by control channel; Step C) statistical value relatively reported by described base station in and respective threshold, carry out switch decision.
In addition, step C) in, by the more described statistical value of user terminal and respective threshold, as meet switching condition, send the Traffic Channel handover request to base station and indicate switching type, after this request is received in base station, as allowed switching, then indicate this user terminal to be switched.
In addition, described switching condition is: provide the base station of Traffic Channel or signal or the Traffic Channel of relay station to worsen lower than default standard, and can provide the base station of Traffic Channel or the signal of relay station to be better than default standard.
In addition, described signal parameter is: one or more in signal strength signal intensity, signal quality; Described switching condition is: provide the base station of Traffic Channel or the signal parameter statistical value of relay station to be less than or to be less than or equal to the reservation threshold value of this parameter, and switched during the switching threshold that can provide the signal parameter statistical value of the base station of Traffic Channel or relay station to be greater than or to be more than or equal to this parameter; The base station that corresponding switching type can provide Traffic Channel for this user terminal is established to or the Traffic Channel of relay station, be switched to newly-established Traffic Channel by the Traffic Channel of use; For the business of the same priority of base station or relay station, described switching threshold is greater than described reservation threshold value.
In addition, described switching condition also comprises, as provide the signal of the base station of Traffic Channel or relay station or Traffic Channel parametric statistics value at the switching threshold of this parameter and retain between threshold value, and the signal parameter statistical value that the base station of Traffic Channel or relay station can be provided is switched while being greater than or being more than or equal to the switching threshold of this parameter, the base station that corresponding switching type can provide Traffic Channel for this user terminal is established to or the Traffic Channel of relay station, and use original Traffic Channel and this newly-established Traffic Channel simultaneously.
In addition, described signal parameter is Timing Advance; Described switching condition is: provide the base station of Traffic Channel or the Timing Advance statistical value of relay station informing user terminal to be greater than or to be more than or equal to the reservation threshold value of this parameter, and switched during the switching threshold that can provide the Timing Advance statistical value of the base station of Traffic Channel or relay station informing user terminal to be less than or to be less than or equal to this parameter; Corresponding switching type is: this user terminal is established to base station that Traffic Channel can be provided or the Traffic Channel of relay station, and the Traffic Channel of use is switched to newly-established Traffic Channel; For the business of the same priority of base station or relay station, described switching threshold is less than described reservation threshold value.
In addition, described switching condition also comprises: as the Timing Advance statistical value that the base station of Traffic Channel or relay station informing user terminal be provided is at the switching threshold of this parameter with retain between threshold value; And the Timing Advance statistical value that the base station of Traffic Channel or relay station informing user terminal can be provided is switched while being less than or being less than or equal to the switching threshold of this parameter; Corresponding switching type is: this user terminal is established to base station that Traffic Channel can be provided or the Traffic Channel of relay station, and uses original Traffic Channel and this newly-established Traffic Channel simultaneously.
In addition, described signal parameter statistical value is the accumulative total mean value that the statistical value in a plurality of timing statistics sheets is added up on average to obtain; Described switching threshold and reservation threshold value are the accumulative total average threshold.
In addition, user terminal, when fixed intervals timer meter is full, reports described statistical value mode directly or is sent to base station by relay station with fixed intervals by control channel.
In addition, user terminal carries out across before the switching of base station, if this user terminal comprises a plurality of Traffic Channels, base station indicates this user terminal that Traffic Channel is merged, and uses one in base station or relay station for it, to provide Traffic Channel.
In addition, step C) in, message directly or by relay station is switched to the terminal transmitting channel by control channel in base station, the indication information that comprises the Traffic Channel switching type in described channel switching message, described Traffic Channel switching type comprises: the Traffic Channel of only using base station to provide, the Traffic Channel of only using relay station to provide, the Traffic Channel of simultaneously using base station and relay station to provide.
In addition, steps A) before, base station or relay station arrange switching threshold, reservation threshold value and the switching condition of described Traffic Channel according to service priority and traffic channel types, described traffic channel types comprises: the Traffic Channel provided by base station and the Traffic Channel provided by relay station.
As from the foregoing, the present invention passes through in base station and the enterprising industry business of relay station channel statistical, carry out the Traffic Channel switching according to Traffic Channel statistical value indicating user terminal, take full advantage of the traffic channel resource of base station and relay station, improved transmission speed and the service quality of business datum.
The accompanying drawing explanation
Fig. 1 is the schematic diagram of the junction network that comprises a base station and two relay stations;
Fig. 2 is the Traffic Channel changing method flow chart of embodiment of the present invention junction network.
Embodiment
Basic ideas of the present invention are, in base station and relay station, obtain signal parameter that the user terminal statistics obtains and with corresponding Traffic Channel switching threshold relatively, as meet switching condition, base station indicates this user terminal to carry out the Traffic Channel switching.
Below in conjunction with drawings and Examples, describe the present invention.
Fig. 2 is the Traffic Channel changing method flow chart of embodiment of the present invention junction network, and as shown in Figure 2, the method comprises following steps:
101: base station, relay station and user terminal are each class business setting service priority;
Service priority is that business is divided into to different grades according to demand, with the grade of service quality (Quality ofService, be called for short QoS) be corresponding.For each class business, base station, relay station and user terminal arrange identical service priority for it.
102: base station, relay station and user terminal are selected the signal parameter for the Traffic Channel switching judging, and base station arranges corresponding switching threshold, retains threshold value and switching condition in conjunction with service priority and traffic channel types;
Above-mentioned signal parameter be for reflecting in real time the parameter of the Traffic Channel quality between terminal to base station or relay station, as signal strength signal intensity, signal quality, Timing Advance (Timing Advance, TA) etc. or be the combination of above parameter.
The Traffic Channel switching threshold is can be switched to from other Traffic Channel a threshold value of this Traffic Channel for judging whether.Outside the Pass the signal parameter with selected and service priority phase, switching threshold can also be relevant to traffic channel types.Traffic channel types comprises two kinds of BTS service channeling and trunking station Traffic Channels.To each signal parameter, the size of its corresponding switching threshold is determined by service priority and traffic channel types.The present embodiment, except switching threshold, also arranges a reservation threshold value for each signal parameter.This retains threshold value also can be relevant with service priority and traffic channel types, is need to be switched to from this Traffic Channel a threshold value of other Traffic Channel for judging whether.For same parameter and traffic channel types, retain threshold value and usually be not equal to switching threshold, to avoid frequent switching.Certainly, both also can equate, now retain threshold value and are switching threshold.
And switching condition can trigger the Traffic Channel switching while having stipulated between signal parameter value and corresponding switching threshold to meet which kind of relation (as be greater than, be more than or equal to, be less than, be less than or equal to or other logical relation), can adopt single parameter to be judged, also can a plurality of parameter combinations get up to be judged.
Only have and meet this two sub-conditions simultaneously, just met at last switching condition.
103: user terminal access base station and/or relay station in base station and relay station signal cover, set up control channel and Traffic Channel and initiate business;
Control channel and Traffic Channel that user terminal is set up comprise following several situation: A, and control channel and Traffic Channel are the channel between terminal and base station; B, control channel and Traffic Channel are the channel between terminal and relay station; C, control channel is the channel between terminal and base station, Traffic Channel is the channel between terminal and relay station; D, control channel is the channel between terminal and relay station, Traffic Channel is the channel between terminal and base station.
In literary composition, the Traffic Channel provided by institute's access base station or relay station of the current choice for use of user terminal is called to resident Traffic Channel.Will be except resident Traffic Channel, this user terminal can select to set up but still unfounded other Traffic Channel be called non-resident Traffic Channel.
The user terminal 1 of take in Fig. 1 is example, during as this user terminal 1 access, select to have set up and base station between Traffic Channel, the Traffic Channel between itself and base station is called to resident Traffic Channel; As this user terminal 1 can also set up and relay station 1 between Traffic Channel, the Traffic Channel between itself and this relay station 1 is called to non-resident Traffic Channel.
For resident Traffic Channel and non-resident Traffic Channel, switching condition can be divided into to two sub-conditions:
The first sub-condition: be directed to resident Traffic Channel, user terminal need be switched to from this Traffic Channel the condition of other Traffic Channel, as user terminal is added up the base station that Traffic Channel is provided or the signal strength signal intensity of relay station or the reservation threshold value that signal quality was less than or was less than or equal to this parameter obtained, or the lead of user terminal is greater than or is more than or equal to the reservation threshold value of this parameter;
The second sub-condition: be directed to non-resident Traffic Channel, user terminal can be switched to from other resident Traffic Channel the condition of this Traffic Channel, as user terminal is provided by base station or the signal strength signal intensity of relay station or the switching threshold that signal quality was greater than or was more than or equal to this parameter of the provided Traffic Channel obtained, or Timing Advance is less than or is less than or equal to the switching threshold of this parameter.
104: the service priority of base station recording user business that terminal is used (following also referred to as teleservice priority);
105: user terminal obtains to be provided Traffic Channel and can provide the base station of Traffic Channel and the signal parameter of relay station, and by information reporting base station or the relay station of control channel;
When base station provides control channel for user terminal, or base station and relay station be while providing control channel for user terminal simultaneously, and user terminal sends to base station by signal parameter value; When relay station provides control channel for user terminal, user terminal sends to relay station by signal parameter value.For resident Traffic Channel, also can adopt other parameter, as the direct parameter of reflection Traffic Channel quality such as the signal to noise ratio of descending signal, the error rate, these parameters report after can being detected by terminal.
Above-mentioned signal parameter value can be that user terminal is added up signal parameter, the statistical value of the signal parameter of acquisition.Carry out signal parameter and add up the method that can adopt accumulative total average, that is: divide a plurality of timing statistics sheets, statistics is started to the signal parameter statistical value of current each timing statistics sheet comprised, carry out addition and get the corresponding accumulative total of average acquisition mean value.Adopt the average mode of accumulative total to carry out the signal parameter statistics, the dynamic change situation of reflected signal parameter value more accurately, the irregular change of erasure signal parametric statistics value.When adopting the accumulative total averaging method to carry out the signal parameter statistics, corresponding reservation threshold value and switching threshold are the accumulative total average threshold.
In the present embodiment, user terminal with Fixed Time Interval to base station or relay station periodically report signal parameter value, in this case user terminal can not preserve the Traffic Channel switching threshold and the switching sub-condition.In the mode reported at Fixed Time Interval, user terminal also can be preserved Traffic Channel switching threshold and the sub-condition of switching, upper giving the correct time, only need report resident Traffic Channel and non-resident Traffic Channel whether to meet the subconditional information of above-mentioned switching.
In another embodiment, user terminal also can adopt burst to report mode, meet while switching sub-condition changing because of associated signal parameter, with burst mode to base station or relay station report the signal parameter value of this user terminal.In this case, user terminal also needs to arrange and preserve reservation threshold value and/or the switching threshold of each signal parameter.
Certainly, user terminal also can report above-mentioned signal parameter after the indication that receives base station, relay station.For example, when the Service Source of base station or relay station is nervous, to the user terminal in signal cover, sends and report Indication message, user terminal to receive transmitted signal parameter after this Indication message.
User terminal can, by control channel, sending the Traffic Channel notification message, report each signal parameter value.If do not retain the switching threshold of relay station signal parameter in base station and retain threshold value, can in notification message, comprise above-mentioned two threshold values, so that the implication of the signal parameter value comprised in this notification message is known in base station.
For example, while adopting signal strength signal intensity as signal parameter, it retains threshold value accordingly and switching threshold is denoted as respectively: STs and STc, STs<STc; When the change in signal strength of user terminal when being less than STs or being greater than STc, report this signal strength values (or this signal strength values and respective threshold) of described user terminal with burst mode, or with burst mode, report described user terminal to meet Traffic Channel to switch sub-condition.The present embodiment does not report when signal strength signal intensity is less than STc, is for fear of in some cases, when signal strength signal intensity fluctuates up and down near STc, causes user terminal frequently to base station, to report related news.
Report mode and the burst of above fixed intervals report mode to adopt simultaneously.
106: the relay station that receives the message reported forwards this message to affiliated base station;
107: the Traffic Channel switch decision is carried out according to the base station in the message of receiving and the signal parameter value of relay station in base station, as met the Traffic Channel switching condition arranged, carries out next step; Otherwise, jump to step 105;
For example, while adopting signal strength signal intensity as signal parameter, it retains threshold value accordingly and switching threshold is denoted as respectively: STs and STc, STs<STc; When the signal strength signal intensity of the base station that Traffic Channel is provided or relay station is less than STc and is greater than STs, do not carry out the Traffic Channel switching.Only have base station that Traffic Channel can be provided or the signal strength signal intensity of relay station to be more than or equal to corresponding switching threshold, and when the signal strength signal intensity that the base station of Traffic Channel or relay station are provided is less than corresponding reservation threshold value, while meeting the first sub-condition and the second sub-condition, just judgement meets the Traffic Channel switching condition simultaneously.Adopt signal quality similar as the situation of signal parameter.
While adopting Timing Advance as signal parameter, it retains threshold value accordingly and switching threshold is denoted as respectively: TAs and TAc, TAs>TAc; When the Timing Advance of the base station that Traffic Channel is provided or relay station notification terminal is less than TAs and is greater than TAc, do not carry out the Traffic Channel switching.Only have base station that Traffic Channel can be provided or the Timing Advance of relay station notification terminal to be less than or equal to corresponding switching threshold, and when the Timing Advance that the base station of Traffic Channel or relay station notification terminal are provided is greater than corresponding reservation threshold value, while meeting the first sub-condition and the second sub-condition, just judgement meets the Traffic Channel switching condition simultaneously.
Can find out, if signal parameter value retains between threshold value and switching threshold (can be described as resident interval) corresponding, not carry out the Traffic Channel switching.The purpose of doing like this is, when the quality of resident Traffic Channel, during in the acceptable scope, even non-resident Traffic Channel meets the Traffic Channel switching condition, also needn't carry out the Traffic Channel switching, to avoid the frequent switching of Traffic Channel.
108: base station is switched message by control channel to the user terminal transmitting channel;
Comprise channel switching type field in above-mentioned channel switching message, this field is 0 o'clock, and indicating user terminal switches to Traffic Channel by base station and provides; This field is 1 o'clock, and indicating user terminal switches to Traffic Channel by relay station and provides.
If control channel is based upon between base station and terminal, base station can directly be switched message by this control channel by channel and be sent to terminal.As control channel is based upon between relay station and terminal, channel can first be switched the relay station that message sends to the terminal access in base station, then by relay station, re-sends to terminal.
109: user terminal is set up and the base station of Traffic Channel or the Traffic Channel between relay station can be provided after receiving above-mentioned channel switching message, and the Traffic Channel of use is switched to the Traffic Channel of this foundation from former Traffic Channel, and former Traffic Channel can discharge.
In another embodiment, because user terminal can be learnt the statistical value of needed all parameters, therefore user terminal also can configure corresponding switching threshold and switching condition, and the judgement of switching at local finishing service channel by same way as is also switched to base station requests.After receive base station, can be to user terminal Return Channel switching indication as agreed switching, user terminal is processed and is got final product in a manner described after receiving.
In the above-described embodiments, realized the switching of Traffic Channel between base station and relay station.In another embodiment, can use above-mentioned Traffic Channel to retain the grand diversity that threshold value realizes Traffic Channel, user terminal is used base station and two Traffic Channels of relay station simultaneously.Realize that the grand diversity of Traffic Channel need to carry out to above-described embodiment the variation of the following aspects:
In above-mentioned steps 107, if the result of Traffic Channel switch decision is: the non-resident Traffic Channel of this user terminal meets the second sub-condition of Traffic Channel switching, and resident Traffic Channel meets the first sub-condition of Traffic Channel switching or its signal parameter value in resident interval; Judge and can carry out grand diversity operation, base station and relay station can provide Traffic Channel for this user terminal simultaneously;
In above-mentioned steps 108, while carrying out grand diversity operation, the channel switching type field value in signaling channel switching message is 2, and it is its Traffic Channel provided that indicating user terminal is used base station and relay station simultaneously;
In above-mentioned steps 109, user terminal carries out corresponding Traffic Channel handover operation according to channel switching type field, as be grand diversity operation, retain former resident Traffic Channel, and former non-resident Traffic Channel is switched to resident Traffic Channel, use base station and relay station for its Traffic Channel provided simultaneously.
It should be noted that user terminal carries out across base station switching (being cell reselection) front, base station need be to this user terminal transmitting channel switching message, and now can make the channel switching type field in this message is 3, is designated as the switching across base station; After user terminal is received, carry out the switching of control channel and/or Traffic Channel, and guarantee only to use one in base station or relay station for it, to provide control channel and Traffic Channel after switching.
Claims (13)
1. the Traffic Channel changing method of a junction network, is characterized in that, comprises the following steps:
A) base station and/or the relay station of user terminal access junction network, set up control channel and Traffic Channel and initiate business;
B) user terminal is to the signal parameter of each base station of Traffic Channel or relay station is provided, and can provide each base station of Traffic Channel or the signal parameter of relay station to be added up respectively, obtains the statistical value of described parameter;
C) described base station or relay station relatively report statistical value and respective threshold, when judgement meets switching condition, the base station that the described base station that Traffic Channel is provided indicates this user terminal to be established to can to provide Traffic Channel or the Traffic Channel of relay station, be switched to the Traffic Channel of use newly-established Traffic Channel or use former Traffic Channel and newly-established Traffic Channel simultaneously;
Described signal parameter is: one or more in signal strength signal intensity, signal quality, Timing Advance;
Described statistics is added up respectively one or more in described signal strength signal intensity, signal quality, Timing Advance.
2. the Traffic Channel changing method of junction network as claimed in claim 1, is characterized in that,
Step B) in, user terminal reports the statistical value obtained to base station by control channel; Step C) statistical value relatively reported by described base station in and respective threshold, carry out switch decision.
3. the Traffic Channel changing method of junction network as claimed in claim 1, is characterized in that,
Step C) by the more described statistical value of user terminal and respective threshold, as meet switching condition in, send the Traffic Channel handover request to base station and indicate switching type, after this request is received in base station, as allowed to switch, then indicate this user terminal to be switched.
4. the Traffic Channel changing method of junction network as claimed in claim 2 or claim 3, is characterized in that,
Described switching condition is: provide the base station of Traffic Channel or signal or the Traffic Channel of relay station to worsen lower than default standard, and can provide the base station of Traffic Channel or the signal of relay station to be better than default standard.
5. the Traffic Channel changing method of junction network as claimed in claim 2 or claim 3, is characterized in that,
Described switching condition is: provide the base station of Traffic Channel or the signal parameter statistical value of relay station to be less than or to be less than or equal to the reservation threshold value of this parameter, and switched during the switching threshold that can provide the signal parameter statistical value of the base station of Traffic Channel or relay station to be greater than or to be more than or equal to this parameter; The base station that corresponding switching type can provide Traffic Channel for this user terminal is established to or the Traffic Channel of relay station, be switched to newly-established Traffic Channel by the Traffic Channel of use; For the business of the same priority of base station or relay station, described switching threshold is greater than described reservation threshold value;
Wherein, described reservation threshold value is to judge whether terminal needs to carry out the threshold value of Traffic Channel switching;
Described switching threshold is the threshold value for judging whether terminal carries out the Traffic Channel switching.
6. the Traffic Channel changing method of junction network as claimed in claim 5, is characterized in that,
Described switching condition also comprises, as the signal parameter statistical value that the base station of Traffic Channel or relay station be provided is at the switching threshold of this parameter with retain between threshold value, and the signal parameter statistical value that the base station of Traffic Channel or relay station can be provided is switched while being greater than or being more than or equal to the switching threshold of this parameter, the base station that corresponding switching type can provide Traffic Channel for this user terminal is established to or the Traffic Channel of relay station, and use original Traffic Channel and this newly-established Traffic Channel simultaneously.
7. the Traffic Channel changing method of junction network as claimed in claim 2 or claim 3, is characterized in that,
Described signal parameter is Timing Advance; Described switching condition is: provide the base station of Traffic Channel or the Timing Advance statistical value of relay station informing user terminal to be greater than or to be more than or equal to the reservation threshold value of this parameter, and switched during the switching threshold that can provide the Timing Advance statistical value of the base station of Traffic Channel or relay station informing user terminal to be less than or to be less than or equal to this parameter; Corresponding switching type is: this user terminal is established to base station that Traffic Channel can be provided or the Traffic Channel of relay station, and the Traffic Channel of use is switched to newly-established Traffic Channel; For the business of the same priority of base station or relay station, described switching threshold is less than described reservation threshold value;
Wherein, described reservation threshold value is to judge whether terminal needs to carry out the threshold value of Traffic Channel switching;
Described switching threshold is the threshold value for judging whether terminal carries out the Traffic Channel switching.
8. the Traffic Channel changing method of junction network as claimed in claim 7, is characterized in that,
Described switching condition also comprises: as the Timing Advance statistical value that the base station of Traffic Channel or relay station informing user terminal be provided is at the switching threshold of this parameter with retain between threshold value; And the Timing Advance statistical value that the base station of Traffic Channel or relay station informing user terminal can be provided is switched while being less than or being less than or equal to the switching threshold of this parameter; Corresponding switching type is: this user terminal is established to base station that Traffic Channel can be provided or the Traffic Channel of relay station, and uses original Traffic Channel and this newly-established Traffic Channel simultaneously.
9. the Traffic Channel changing method of junction network as claimed in claim 2 or claim 3, is characterized in that,
Described signal parameter statistical value is the accumulative total mean value that the statistical value in a plurality of timing statistics sheets is added up on average to obtain; Described respective threshold comprises switching threshold and reservation threshold value, and described switching threshold and reservation threshold value are the accumulative total average threshold; Described reservation threshold value is to judge whether terminal needs to carry out the threshold value of Traffic Channel switching; Described switching threshold is the threshold value for judging whether terminal carries out the Traffic Channel switching.
10. the Traffic Channel changing method of junction network as claimed in claim 2, is characterized in that,
User terminal, when fixed intervals timer meter is full, reports described statistical value mode directly or is sent to base station by relay station with fixed intervals by control channel.
11. the Traffic Channel changing method as claim 1,2 or 3 described junction networks, is characterized in that,
User terminal carries out across before the switching of base station, if this user terminal comprises a plurality of Traffic Channels, base station indicates this user terminal that Traffic Channel is merged, and uses one in base station or relay station for it, to provide Traffic Channel.
12. the Traffic Channel changing method of junction network, is characterized in that as claimed in claim 2 or claim 3,
Step C) in, message directly or by relay station is switched to the terminal transmitting channel by control channel in base station, the indication information that comprises the Traffic Channel switching type in described channel switching message, described Traffic Channel switching type comprises: the Traffic Channel of only using base station to provide, the Traffic Channel of only using relay station to provide, the Traffic Channel of simultaneously using base station and relay station to provide.
13. the Traffic Channel changing method of junction network as claimed in claim 1, is characterized in that,
Steps A) before, base station or relay station arrange switching threshold, reservation threshold value and the switching condition of described Traffic Channel according to service priority and traffic channel types, described traffic channel types comprises: the Traffic Channel provided by base station and the Traffic Channel provided by relay station;
Described reservation threshold value is to judge whether terminal needs to carry out the threshold value of Traffic Channel switching;
Described switching threshold is the threshold value for judging whether terminal carries out the Traffic Channel switching.
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| EP2497316B1 (en) * | 2009-11-03 | 2014-05-21 | Telefonaktiebolaget LM Ericsson (publ) | Multi-link scheduling to compensate for multi-path fading |
| CN102137442A (en) * | 2010-01-22 | 2011-07-27 | 中兴通讯股份有限公司 | Cell selecting and switching method and system |
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